What is a soldering iron

Soldering gun: design features, recommendations for making it yourself

A soldering iron visually resembles a regular household appliance. The difference lies in the temperature produced. Thus, thanks to the maximum power, the device can be used to solder various parts. In this case, it will be possible to assemble the structure using an old soldering iron or a household hair dryer.

What do you need to know about this technique?

A soldering hair dryer is a modern electrical device that allows you to heat metal taps in a short period of time. Thanks to its high-quality assembly and ease of operation, the device is suitable for professional and even novice welders .

A soldering gun is almost never used separately, since precise direction is important during the work process. Therefore, experienced craftsmen often use entire soldering stations. We are talking about a semi-professional heating device, represented by a soldering iron and a welding heater. Such equipment is suitable for working with components of electrical networks and circuits. Also, thanks to the device, it will be possible to perform heat treatment of small parts.

It is worth noting that any soldering guns differ in their characteristics:

• diameter within 2–5 mm;
• power about 450 W;
• fan productivity is maximum 30 liters per minute;
• reaching a temperature of about 500°C.

Equipment design features

A similar device is often used to soften or melt plastic, thin metal and tin. Such processing occurs due to the blowing of a heated spiral. The air heats up and transfers thermal energy to the material.

To make such a functional device with your own hands, you need to understand its design . This includes:

• heater, that is, a housing represented by a tube;
• a supercharger, the function of which is performed by a pump or fan;
• pen;
• switch.

In some cases, a temperature sensor and various attachments are additionally installed.

Making your own soldering gun

People who want to make a soldering gun with their own hands should remember that any used device will be suitable for creating such a product. You can also use a steel tube. Aluminum or copper elements will not work.

Naturally, you need to take into account the fact that during the heating process the element will become too hot and will weigh down the soldering iron, and this will make it inconvenient to use for a long time. Accordingly, some craftsmen choose special heat-resistant fabric .

The soldering guns themselves are stationary. In this case, it is necessary to fix the device on a fixed stand and move the board while working. Naturally, such a design has a number of disadvantages.

When creating such a unit with your own hands, old hair dryers are often used, because there are mica plates that can withstand elevated temperatures. For this element, it is necessary to prepare a foundation that can easily bear significant loads.

If we talk about heating coils, they should be created exclusively from soft nichrome . But fechral will not work because it is too hard.

Particular attention should be paid to the power of the device, since the flux will not melt if the heating is insufficient. However, it must be remembered that due to excess heat, the microcircuit may be damaged.

Making a structure from an old soldering iron

Often, instead of a household hair dryer, a traditional soldering iron, namely its body, is used. All internal filling must be carefully removed, leaving the metal clip and handle intact. You will also need a halogen lamp with a power of 1.5–2.2 kW . It is needed to organize a quartz insulator, and even a burnt-out lamp is suitable for this purpose.

Using a diamond machine, it is necessary to carefully cut off the flattened ends, resulting in a quartz tube, on one side of which there is a technological nipple. Here you need to prepare a hole for the heater outlet.

Nichrome acts as a heating element. Its thickness should range from 0.3–0.7 mm. If the diameter is larger, the wire will take too long to cool. Additionally, you will need a regulator to properly configure the operation of the equipment.

Next, the assembly is performed in a certain sequence .

1. The quartz tube is carefully placed in a spiral, previously created with your own hands. Its end is extended with a wire.
2. To reduce the heating temperature, the tube is carefully wrapped in foil.
3. After this, the element is placed in a metal casing and the wire is fixed from the handle side.
4. Then the prepared structure is inserted here, and the tube is carefully wrapped with asbestos cord, so that the product is located in the central part of the holder.
5. The front terminal is carefully clamped, and then the hose is placed in the handle for air supply. In this case, the air source is a conventional compressor used in aquariums.

Errors made during the assembly process

Some inexperienced people believe that you can assemble a structure with your own hands if you only have a heater and a fan . For this reason, they use a traditional household hair dryer, but you need to understand that even a powerful device will not be able to melt the tin.

Reducing engine speed and reducing the size of the hole will help raise the temperature. However, in the first option, the spiral will overheat and then turn off or break. In the second case, the temperature will increase significantly, as a result of which the structure may melt.

Features of soldering stations

A similar design is represented by the main unit, as well as a hot air gun manipulator responsible for heating the air. Such units are used to repair various household appliances.

All stations are divided into two groups:

• turbine, where a small vane electric motor is responsible for the air supply;
• compressor units, in which air is supplied due to the presence of a compressor.

The first option is distinguished by its ability to generate a significant air flow, while the second helps it pass through really narrow nozzles.

In general, the operating principle of the soldering station is very simple. So, the air passes through a heater located in the tube, and then it heats up and exits onto the part through the corresponding nozzle.

Naturally, hot air stations have several disadvantages:

• the ability to blow off a small part;
• uneven heating of the surface;
• the need for various additional attachments.

Creating a station yourself

This design can be done with your own hands. A hairdryer and a coil, which is a heating element, are suitable for these purposes. Any small fan will act as a supercharger. For example, it could be a cooler from a power supply. It is placed on the handle of a hot air gun. A tube for heating the air is also connected here. The cooler itself is tightly closed on one side, and a small hole is prepared on the other.

Assembling the heater can cause certain difficulties, so the work is done very carefully .

1. Nichrome wire is wound onto the base, and the turns should be at a short distance.
2. To create a base, you will need a material with low thermal conductivity and increased resistance to high temperatures. For this purpose, you can take mica plates that are built into old household hair dryers. It can also be a halogen lamp used in a spotlight.
3. 5–7 cm of the base should remain free. This place is wrapped in heat-resistant fabric.
4. Then a ceramic or porcelain nozzle is prepared. Here you need to fix the thermal insulation material, which will increase the efficiency of the finished structure.
5. All elements must be assembled so that air enters the tube and the heater is located in the middle of the nozzle.

The finished product will look like a pistol . To make it convenient for them to do their work, it is possible to fix various holders or attachments.

There are 4 wires coming out of the back of such a station, which are recommended to be insulated. It is also worth making sure that you have a pair of rheostats, thanks to which you can adjust the power of the air flow and the heating element. Then all that remains is to install the switch and prepare the outlet for the outlet.

It is very simple to make a soldering gun for performing various tasks with your own hands. For these purposes, you can use any old soldering iron or hair dryer. The main thing is to correctly assemble all the components so that the device does not overheat and provides the necessary power.

Source: https://stanok.guru/metalloobrabotka/payka/sozdanie-payalnogo-fena-svoimi-rukami.html

DIY soldering gun: a simple diagram of a homemade hot air gun for soldering microcircuits

High-quality professional equipment for soldering microcomponents costs a lot of money, and inexpensive hot air guns are not suitable for most tasks. Many repairmen and radio amateurs from time to time encounter low-quality hot air guns for soldering.

To avoid such misunderstandings, it makes sense to make a soldering gun with your own hands. This option is perfect for repairmen and radio amateurs who have specific equipment requirements and a very limited budget.

Hair Dryer Basics

Before you start designing a homemade soldering gun, you should familiarize yourself with the basic methods of using this tool.

A hot air gun for soldering, as a rule, may be needed in the following cases:

1. Soldering very small parts in SMD packages.
   Most small radio components cannot be soldered with a soldering iron. To install such components, it is necessary to tin the landing site, lubricate it with flux and position the microcircuit. After this, you can safely start heating the mounting contacts using a hair dryer until the solder under the component melts and it sits on the printed circuit board.
2. Lack of free space to use a soldering iron.
   With a very dense arrangement of elements on a printed circuit board, using a soldering iron is significantly difficult. In this case, a hot air gun is the best option for a radio amateur.
3. Repair work related to mobile phones or tablet computers.
   Most modern gadgets are almost impossible to disassemble without using a heat gun. For example, replacing the screen on any phone requires pre-heating the old matrix using a heat gun. Serious heat neutralizes the adhesive and allows the screen to separate from the device body.
4. Removing BGA chips from pads.
   Work on reballing and warming up modern video chips is carried out using a soldering hot air gun.

The soldering process using a soldering hot air gun involves the following steps:

• applying solder or soldering paste to the intended installation site;
• installation of the microcircuit on the seat;
• warming up the mounting contacts using a soldering hot air gun.

In order to protect nearby components from heat, special screens made of aluminum foil should be placed on them.

After carrying out the work, you should check the quality of soldering of all contacts using a needle.

Removing the element using a hair dryer is even easier. To remove a faulty microcircuit you must:

• heat all contacts evenly;
• Carefully remove the element using tweezers or a suction cup.

When heating the surface with a hot air gun, it is necessary to make circular movements. This technique allows you to avoid local overheating of the board and disruption of its geometry.

equipment requirements

Electrical circuit of a soldering gun.

The basic requirements for a hot air gun for soldering microcircuits with your own hands are:

1. Compliance with soldering temperature conditions.
   Most soldering work is carried out within 190 – 250 degrees Celsius. The lower bar concerns lead-containing solders, and the upper bar concerns factory lead-free solders. The soldering hot air gun must produce an air flow of a strictly specified temperature in order to protect the microcircuits from overheating and failure.
2. Stable air flow.
   If the air flow is uneven, working with soldering equipment becomes seriously difficult.
3. Safety and ease of use.
   The heat gun should not overheat and pose a danger to the technician. Ideally, a powerful DIY soldering gun should be designed based on a transformer power supply.

The soldering equipment must contain exclusively safe elements. When making a homemade compressor power supply, special attention should be paid to the reliability of the design and its safety for others.

Hairdryer from a soldering iron

Before you make a soldering gun with your own hands, you should:

• think over a device for air supply;
• assemble a special heating element;
• equip the equipment with thermocouples;
• think over a system for monitoring the current temperature of the equipment.

When considering how to make a soldering iron from a regular soldering iron, you should take into account all the subtle points so as not to expose yourself to excessive risk.

The main criteria that a soldering iron-based thermal device must meet are:

• temperature adjustment;
• normal heater power;
• safe compressor.

What do you need to create a hair dryer from a soldering iron?

When creating a hair dryer for soldering with your own hands, you should prepare:

• a regular old soldering iron running on AC power;
• a quartz tube to create a hair dryer air flow heating chamber;
• a halogen lamp for spotlights for heating the air and melting flux with a hairdryer;
• nichrome wire up to 0.7 millimeters thick;
• thermostat;
• soldering gun fan.

Schematic diagram of a soldering gun.

All equipment must be connected to specially prepared connectors at the soldering station, the pinout of which depends on the manufacturer of the soldering equipment.

The process of assembling a hair dryer from a soldering iron

A homemade hair dryer for soldering microcircuits from an old soldering iron is assembled in several stages:

1. Laying a homemade spiral of nichrome wire inside a quartz tube.
2. Connecting the spiral to the power wire.
3. Threading a thermocouple wire to regulate the temperature of the filament.
4. Insulation of the device using a layer of tube wound on a quartz tube.
5. Installing a tube in the handle of a soldering iron instead of a tip.
6. Centering the tube by wrapping it with asbestos cord.
7. Clamping the front tube outlet using a clamp.
8. Threading a hose to supply air flow.
9. Connecting a compressor that creates an air flow.

It is better to place the temperature regulator of the heating source on the body of the heat gun.

The operating principle of a hot air gun based on a soldering iron is as follows:

A small current is applied to the nichrome thread, causing it to become hot. The air coming from the compressor is collected in a special insulated chamber and heated under the action of a spiral and insulating foil. After this, the air leaves the heating chamber and goes directly to the printed circuit board.

Soldering gun - drawing for manufacturing.

Unfortunately, this method of making a thermal hair dryer has a lot of disadvantages.

The disadvantages of a hot air gun made from a conventional soldering iron include:

• difficulties with temperature calibration;
• The air flow force is adjusted by pinching the air duct;
• the inability to adjust the heating intensity in most conventional soldering irons;
• labor intensity of work;
• poor thermal insulation of the device.

In most cases, making a heat gun from a soldering iron is not justified. Remaking an inexpensive construction hot air gun is a much more efficient method of making a hot air gun for soldering micro components.

Conclusion

There are a huge number of instructions on the Internet on how to make a soldering hair dryer. Most methods for making a thermal hair dryer are based on modifying existing equipment, for example, a construction hot air gun, a household hair dryer, or a regular soldering iron with a metal tip.

In many cases, if you need to use a soldering hot air gun, you should think about purchasing the appropriate station. A hot air gun connected to the soldering station provides data on the current temperature of the air flow and allows you to calibrate the thermocouple.

Source: https://tutsvarka.ru/oborudovanie/payalnyj-fen-svoimi-rukami

Homemade hair dryer for soldering small parts

Due to the improvement of assembly technologies for various types of products assembled from small metal parts (electronic microcircuits), their manual soldering is causing more and more difficulties.

A homemade soldering gun will allow the operator to cope with the difficulties that arise in these situations without any special complications and eliminate the risks that arise.

So, with the help of a self-assembled soldering station, anyone can install and dismantle parts without the threat of damaging fragile electronic elements located near the soldering site. One of the possible solutions to this problem allows you to make a hot air gun from a soldering iron, which is available in the household kit of any home craftsman.

Principle of operation

The operating principle of a typical soldering station with a hair dryer is quite simple and is as follows.

The air accelerated by a fan or compressor is pumped into a special channel made in the form of a tube with an electric spiral. Passing through this channel, the flow is heated to the required temperature (from 100 to 800 degrees) and immediately enters a plastic calibrated nozzle, which directs the hot jet onto the workpiece.

In most industrial models of soldering guns, the main parameters of the heated jet (its temperature, direction of movement, and power) can be adjusted within certain limits.

Turbine and compressor type

The circuit diagram of a DIY soldering station can be presented in the form of a main module and a terminal device (thermal hair dryer) that provides heating of the air in the soldering zone.

Before its manufacture, you need to know that according to the method of forming a forced air flow, such devices are divided into turbine and compressor type soldering devices.

In turbine units, air is supplied to the treatment zone by means of a small electric motor with a fan built directly into the hair dryer body. In products of the second class, the air flow is formed using a special compressor located in the main module (controller for a soldering gun).

When choosing the required type of station for soldering small parts, one usually proceeds from an assessment of the following multidirectional factors:

• fan soldering stations are capable of generating a more powerful air flow, which is an obvious advantage of the hair dryer built into them. However, the flow created with their help hardly passes through nozzles that are too narrow;
• compressor hair dryers, on the contrary, are more effective when working with relatively narrow nozzles used when soldering parts located in hard-to-reach places.

The choice of the optimal version of a soldering gun capable of working with a given set of plastic nozzles is carried out taking into account the specific conditions of its operation.

Cooler based

The easiest way to make a hairdryer with your own hands at home is to use the turbine principle of air injection, implemented using any small-sized fan suitable for these purposes.

A soldering hair dryer can be made with your own hands using the cooler that comes with the power supply of any desktop computer.

In this case, the fan is built into the handle of a thermal element made of a fireproof tube with an electric spiral, passing through which the air will heat up and then enter the soldering zone.

The outer part of the soldering gun body must be made airtight, which eliminates the possibility of air being sucked into the surrounding space. To assemble the heater, you will need nichrome wire wound in a spiral on a ceramic tube.

The total length of the winding is selected so that the resistance of the entire wire segment is about 70-90 Ohms.

The individual turns of the spiral wound on a ceramic base should be located at some distance from one another. For safe operation of the heater, this removal should be about 1-2 mm.

From a soldering iron and a dropper

To make a soldered hair dryer with your own hands, you can use a simple soldering iron with the protective casing removed from it.

When taking it as the basis for a future heater, it is necessary to modify the design, which consists of the following:

• First, the tip is removed from the working part of the soldering iron, after which the mica tube with the nichrome winding placed underneath it is completely pulled out of the wooden handle-holder.
• Then the power wires suitable for the heating element are disconnected and also pulled out of the wooden holder, but from the other side.
• After this, a hole of the required size is drilled in the side of the handle, into which the previously disconnected network wire is threaded (towards the working part).
• At the next step of making a soldering gun, take a dropper, from which the tip is cut off in the area where the rubber skirt is located. Then the exposed part of the tube is inserted into the network hole of the wooden handle.
• Next, the rubberized seal (skirt) of the dropper is pressed with force against the end part of the holder, ensuring reliable sealing of the docking area.
• Upon completion of these actions, the ends of the drawn power wire are reconnected to the nichrome winding and reliably insulated.
• A piece of telescopic antenna of suitable diameter is inserted into the hole where the soldering iron tip was previously located and carefully clamped with a locking screw.

The tightness of the inlet hole in the handle will ensure effective inflation with cold air coming from the compressor station.

At the final stage of assembling the soldering gun, you should return the heating tube with the nichrome winding to its place, having previously wrapped it with several layers of aluminum foil.

Then the heater prepared in this way is recessed into a wooden handle and securely fixed using a flexible copper wire wound along the entire length of the protective coating.

Self-repair of industrial designs

Before repairing a soldering gun, first of all, you need to familiarize yourself with the connection diagram of the fan and heater to the electrical network (its other name is pinout).

Knowledge of this circuit allows you to check the correctness of the power supply to each of the main elements of the thermal module and make sure that they are in good condition.

Direct repair of a non-working soldering device comes down to replacing failed or damaged parts, which can be detected by the presence of characteristic burn marks.

When operating a soldering gun, sudden changes in operating modes (heater temperature jumps, in particular) should be avoided. In addition, it is strictly forbidden to touch the working thermal element, as well as the replaceable nozzles.

Otherwise, the operator risks serious skin burns from the hot air. Changing plastic attachments is allowed only after the soldering gun has been completely turned off and all its working parts have cooled down.

Source: https://svaring.com/soldering/instrumenty/pajalnyj-fen-svoimi-rukami

DIY soldering hair dryer. And a little theory

I have long wanted to make a soldering gun for myself. I'm not interested in ready-made ones. Since I started converting ATX power supplies into laboratory ones, it became possible to get 24-25 volts at currents up to 8 amperes. In reality, my hair dryer works up to 5 amperes.

As a compressor, I used a hybrid of an axial fan, designed in a casing (volute) according to the principles of a centrifugal fan. There were also simply centrifugal ones, but I’m curious to try this option. The idea turned out to be quite workable.

It blows no worse than my other centrifugal fans, even in the presence of aerodynamic resistance (the main problem of axial fans). I recommend it if you don’t find a suitable turbine.

Received parameters

• Heater power 110 watts.
• The supply voltage is adjustable within 24.2 volts.
• Current consumption up to 4.8 amperes.

It takes mosfets from boards with lead-free solder quite well. Small things even more so.

I also took the composite video output connector from the same board.
the processor is gone. Small things can be removed from boards with regular solder already at 75 watts of power quite comfortably. It can be lower if you reduce the fan speed.

At full power, forty-legged microcircuits are completely removable. Phone payments are easy.

Where to begin?

Decide on the power you can and want to receive. Less than 100 watts doesn't make much sense. It's enough for the little things, however, if you do the rest correctly. I came out at 100-110 watts. It's not enough to fix video processors.

Second. The current you can get from the power supply. The choice of nichrome for the spiral depends on it. I have nichrome 0.4 mm. If sclerosis does not change, it was sold on the market as a 1.5 kW tile spiral. I found it optimal. Thin wire does not hold its shape well, thick wire requires a large current to obtain sufficient temperature.

For a 0.4 mm wire, a current of about 3.5 - 5.5 amperes is needed. So that the wire heats up to a yellow glow approximately. With intense airflow, its temperature will decrease. Let us remember that the diameter of the wire uniquely determines the current. But the power will have to be gained by voltage. Since my power supply supplies 24 volts for this purpose, I stopped there.

The resistance of the cold spiral turned out to be around 3 ohms. In a heated form, according to calculations - about 4. The spiral does not care what kind of current, constant or alternating. You can power it directly from the transformer through a dimmer for adjustment. True, the trance will then buzz.

And it must have sufficient power and a winding made of thick enough wire to hold the selected current.

An important element is the fan. Axial ones can be used as a last resort, but they do not cope well with pushing air through labyrinths. Their path is to blow in a straight line. Therefore, a centrifugal fan is preferable for a hair dryer. It is precisely designed to push air through significant aerodynamic resistance.

It so happened that some time ago I visited a friend and he showed me a heating system of his design. Where there is also a centrifugal fan. Homemade too. It turned out that he made both possible mistakes there for fans of this kind. I incorrectly chose the direction of rotation for the impeller from the vacuum cleaner and incorrectly made the snail for it.

I’m not a fan designer at all, but I studied physics at school, so I have an idea of ​​how it works. Well, it seems like a well-worn topic, so while preparing the article I went to Google. And, to my surprise, I discovered that almost a third of the pictures on this topic contain one of two or both errors at once. Therefore, I will give my diagrams so that no one gets confused.

Moreover, this makes direct sense for beginners.

This is the general principle for constructing centrifugal fans. Three different possible impeller options are shown. There are actually more options, but that's enough for us. Please note that these are three different versions of impellers. Just partially shown. This is by no means one. As you can understand from the diagram, the impeller should “push” the air to the sides, thereby creating pressure. (Oh, those “painters” from Google, they draw what they themselves do not understand).

Red option number 1 is the best. Green (2) is worse. Blue (3) is worse than the previous two, but it will work. If your impeller rotation direction is different, just mirror the diagram.

I did almost the same thing, only I installed the impeller from an axial fan.

The impeller, naturally, works to “blow” air inside. The difference from a simple axial fan is that the energy for swirling the air flow is not wasted, but is used according to centrifugal principles. In theory, such things should be patented. The resulting hybrid works quite adequately. It's noisy, but that depends on your luck.

The fact is that with a small impeller diameter (either axial or centrifugal), in order to ensure sufficient air flow, you will have to give high engine speeds. With all the ensuing consequences. With a large impeller it could be quieter, but the convenience of a hairdryer will be lower.

If you create a turbine, as I suggested, when choosing a base for a fan, preference should be given to small-sized blades with a high rotation speed, preferably straight blades (saber-shaped blades will work worse). The more blades the better. The steeper their inclination (angle of attack), the better. I used an impeller from a very old video card. 12 volts, about 1.5 watts. Impeller diameter 37 mm. Use what you find. Experiment.

Suitable centrifugal fans in almost finished form, or as donor impellers with an engine for my snail. You can put it not “flat” like mine, but perpendicular to the hairdryer. In my first attempts I did just that. And the turbine from the laptop showed itself very well. And quieter too. But it was already very worn out and was designed for 3.5 volts, so I went a different route.

My hybrid compressor is larger.

The main body of the snail is made of polystyrene foam. It doesn’t matter what it’s made of, even wood. The structure is clearly visible. By the way, if you are planning to make protection for the impeller, I highly recommend not drilling small holes in the top cover.

If you want to know why, google the device of a mechanical hand-held siren from the war. The noise level will be three times higher than with the shown option.

I used a 18650 battery case as a sleeve for the hair dryer.

Mining technology of the type shown in this video (from someone else’s YouTube channel):

Only I didn’t bother with drilling, as the author suggests, through the bushings. Drilled it with a small drill. Drilled out 4 mm. Use a needle file to correct it if the center of the hole has shifted. I drilled further with a step drill, adjusting with a file at each step, if necessary. I also made the bushing differently. From some kind of chandelier there is a threaded tube with two thin nuts.

I riveted one nut at the end so that it would no longer rotate, and I tighten the second one. I insert the fixed nut from the inside of the battery cup. I ground off the excess part of the thread for beauty. You can do without a bushing, but the flow will be worse. Not a jet, but a diverging torch. I don't recommend very thin ones. An internal diameter of 7-10 millimeters, I think, will be more convenient. And there is no need to create unnecessary air resistance.

Mica is placed inside the 18650 cup. The spiral was wound on a glass fiber laminate plate 14 mm wide. Nichrome with a diameter of 0.4 mm. I wound 16 turns. If you use a different supply voltage, you will have to select the number of turns. The ends were bent at 90 degrees. Leave the ends longer, then cut them in place. And this spiral must be placed on a ceramic tube. I bought it at the Mitinsky radio market at one time.

Diameter 4 mm. In principle, almost any one will do, but if the diameter is very different, you may have to experiment with the width of the winding plate. One end of the spiral is passed through a ceramic tube. The spiral placed on a ceramic tube must be “twisted”, shifting each subsequent turn relative to the previous one. If you can unwind these 16 turns a couple of turns, that’s not bad.

Since the length of the spiral is short, we must strive to position it more evenly. To enhance the heating of the air, I additionally inserted an impeller made of galvanized iron (or tin), which additionally rotates the air flow against the rotation of the spiral, improving heat transfer. And at the same time it serves for some kind of centering of the ceramic tube inside the glass.

The resulting spiral should be freely inserted inside the cup with mica. But it is advisable that it does not flop around there too much. I insert it tightly enough.

The picture shows the same impeller for twisting the air flow and you can see how I finished it with nichrome. I bent it in half, twisted it a little, put on and flattened the brass tubes from the NShvi 0.7-8 tips (you can use a tube from an antenna, for example).

I wrapped the ends with a thin copper wire, soldered them, soldered silicone wires from some kind of heater (in principle, you can use ordinary ones), and also crimped the soldering area with brass tubes. All this is needed to reduce the heating of nichrome in the area of ​​contact with the wire. On top there are fiberglass tubes. Can be found in dead energy savings, for example. Instead of soldering, you can use mechanical clamps.

Which ones will you find? Keep in mind that the spiral and impeller for swirling air must be insulated to prevent short circuits to the housing and to each other.

The further “body” was assembled from a pipe (used in furniture and design) and a housing from a car cigarette lighter (it fits well on a battery cup), fortunately I had several of them accumulated after experiments with an infrared soldering iron. Use what you find, it doesn't matter. The tube was connected to the cigarette lighter body by soldering.

There is no special heat, it will hold up. The ends of the body were cut crosswise to get something like a collet, for clamping a cup from 18650 through a piece of glass insulating tape, or just fiberglass for thermal insulation.

I made the duct shell from tin and soldered it. A plate is soldered to it on top (I used foil fiberglass) to which the fan is attached with screws.

I cut the threads for the fastening screws directly into it.

In the picture the spiral is not yet completely twisted.

In the final form it looks something like this. This photo more or less shows how the rest of the wire was designed. This is not the final version, without the impeller yet.

At the exit.

Assembled.

A little about nutrition

Source: https://radioskot.ru/index/86-524-5-1

Soldering gun - what is it? :

Not every person who is faced with the need to carry out heat treatment at home has the opportunity to use professional welding tools. This is where a soldering gun comes in handy, allowing you to reliably, quickly and efficiently connect all kinds of metal parts.

Equipment Features

A soldering hair dryer is a modern electrical device that quickly heats metal taps to a certain temperature. Due to its ease of operation, it can be used not only by a professional welder, but also by a beginner who does not have the appropriate skills. Such devices differ in their characteristics. Thus, a hair dryer with a power of about 450 W can heat up to 500 degrees. The maximum fan output is about 30 l/min.

It must be said that in addition to heating the parts, it is also necessary to set the exact direction, which is why most craftsmen prefer soldering stations with a hair dryer.

This is semi-professional heating equipment, equipped with a welding heater and soldering iron. This device is intended for fine heat treatment of parts, as well as for connecting circuit elements and electrical network components.

The diameter of the soldering iron varies between 2-5 mm, so when choosing a device it is necessary to take into account the type of work being performed.

Homemade soldering iron

Not everyone has the opportunity to purchase a professional device. Therefore, more and more people are thinking about how to make a soldering gun themselves, the price of which is about 3,000 rubles. To make this device you will need a compressor from a refrigerator or an aquarium, a thin nichrome thread, a halogen lamp and an old soldering iron. It should be said that there is nothing complicated in this work, so even a beginner can handle it.

First of all, you should remove the tip from a conventional disassembled soldering iron and place a heating element made of a halogen lamp and nichrome thread into its body. The only thing you need to work hard on is the spiral. Before manufacturing it, it is advisable to determine all the parameters taking into account the existing compressor.

Power adjustment

Having made a soldering gun yourself, you will have to work a little on its settings. Changing the electrical parameters is carried out using a series-connected rheostat.

But to ensure optimal operating mode, you will have to experiment a little with the nozzle diameter. However, during the operation of such a device there is always a threat of overheating of parts, so it will have to be periodically disconnected from the network.

To partially eliminate the inconveniences that arise, you can mount it on a special tripod.

Common mistakes during assembly

Some ignorant people mistakenly believe that the manufacture of this device is impossible without a fan and a heater. That is why they recklessly use standard household hair dryers. However, it should be understood that even powerful devices cannot cope with melting tin.

To increase the temperature, you can reduce the caliber of the hole and reduce the engine speed. In the first case, there may be a risk of the structure melting due to significant heating of the device. In the second, there is a huge risk of overheating the spiral with subsequent shutdown of the equipment.

In general, a soldering gun is a simple and budget option that visually resembles a regular household appliance. Even a novice radio amateur can easily cope with its creation.

Source: https://www.syl.ru/article/230942/new_payalnyiy-fen---chto-eto

Making a soldering iron at home

A modern electronics engineer or radio amateur, in addition to a regular soldering iron, simply must have a soldering hair dryer in his arsenal. In addition to simple semiconductors, now it is necessary to solder microcircuits, and this implies the presence of such equipment.

But the problem is that factory-made devices are expensive, and a person who engages in this type of activity as a hobby has absolutely no need for such expenses.

That is why it is worth making a hot air gun for soldering microcircuits with your own hands, practically from scrap materials.

Despite the variety of models of soldering hair dryers, they all have a common structure and operating principle. Any hair dryer, including a household hair dryer, works in a similar way. The only difference is that the latter has a lower air flow temperature.

Otherwise, all devices have almost the same design, which includes:

• Frame.
• A heating element.
• A fan that forces air flow.

As you can see, the design of a soldering gun is extremely simple, which allows you to make it yourself at home, reducing costs to a minimum.

After all, if professionals who use such equipment constantly can easily afford to buy a factory model, or even a soldering station, then for an amateur who occasionally deals with radio electronics, it would be better to save a little. A DIY soldering hair dryer will be the best alternative.

When creating such a design, it is worth considering that the temperature of the exhaust air can reach 850 degrees Celsius, which is significantly higher than that of a hair dryer.

Therefore, it is necessary to understand that the body and handle of the device must be heat-resistant and have low thermal conductivity to avoid injury to the hand during use.

You can also make a stationary modification, but this option is less convenient, because in this case you will have to bring the board itself directly to the device, which is not always practical.

The biggest problem when creating a homemade soldering gun with your own hands is the heating element, since it will not be possible to remove it from any similar thing. Therefore, you will have to make this element yourself.

To do this, you need to take nichrome wire with a cross-section from 0.4 to 0.8 mm and wind it into a spiral with a ring diameter of 4 to 8 mm. The resulting spiral should be wound on a heat-resistant material.

A quartz or porcelain tube is best suited for this, for example, a resistor housing, a part of a halogen spotlight or an old hair dryer.

As an air blower when making a hair dryer for soldering microcircuits, you can use any household fan, a powerful fan from a broken hair dryer, or a compressor for aquariums.

Don't forget about safety. Since the soldering hair dryer runs on electricity, you will therefore have to think about a safe power source.

Of course, the created soldering iron can also be powered from a 220 V outlet, but craftsmen recommend using sources with a voltage of 24-36 V, which is safer, especially if a leak occurs on the case as a result of operation. The best option would be a 24 V power supply.

Making the device yourself

A hair dryer for soldering microcircuits should not only be convenient and safe, but also inexpensive. Therefore, it is preferable to use available means. Moreover, there are no special requirements for the design of the structure, and this allows you to give free rein to your imagination. The main thing is that the resulting product meets technical rather than aesthetic requirements.

The basic requirements for such devices include very few points:

• Temperature . For soldering microcircuits and other similar paraphernalia, a temperature of 600 degrees Celsius is sufficient. However, if you plan to solder silver or aluminum, the temperature should be at least 800 degrees. But such work is done extremely rarely, so 600 is quite enough.
• Power . Here it also all depends on what kind of work is supposed to be performed. If you just need to unsolder a burnt-out microcircuit or diode, then a power of 75 W will be quite enough. But when you need to work with processors or something similar, the device power must be at least 100 W.
• Spiral thickness . Considering that the soldering hair dryer must be compact, the thickness of the spiral is chosen in the range of 0.4-0.5 mm. It holds its shape well and does not require large currents. But a large section, although it behaves well in design, requires an increase in current, which in this case will not be very convenient.
• Voltage . The homemade soldering gun will come with a 24 V power supply, which is the optimal and safe value. If you use smaller voltages, you will not be able to achieve the required power. At a given voltage, the resistance of the spiral should be about 6 Ohms.

Work order

First of all, the required length of nichrome wire is measured, which should be wound in the form of a spiral on a ceramic tube with a diameter of about 5 mm. It should be noted that if the wire is pre-winded on a flat plate, the resulting shape will significantly increase heat transfer, and this will be highly desirable.

The air duct can be made from any heat-resistant material; a piece of blowing tube is good for this purpose. For the heater housing, you can even use a housing from a AA battery or similar battery.

The main thing here is that there is no electrolyte left in its walls. In turn, so that the heater spiral does not come into contact with the walls of the housing, either mica from an old soldering iron or fiberglass is placed inside.

Simply put, any non-flammable material that is also current-insulating.

It is recommended to equip the nozzle from which the hot air flow will come out with an outlet hole measuring 4-5 mm in order to achieve the required flow quality. The bushing from the ceiling lamp socket is perfect for these purposes.

All parts must be carefully and securely connected to each other, after which the main part of the soldering gun design is ready. All that remains is to attach the handle and, in fact, the fan.

You can use a handle from an old soldering iron as a handle. If this is not available, then any material with low thermal conductivity is quite suitable. For example, ebonite, which is easy to process and has all the required qualities.

As for the air blower, almost any aquarium fan or compressor will do. However, in this design it is still preferable to use a small computer fan installed and secured in a plastic case - the result is a fairly reliable and at the same time attractive design.

When the blower is ready, it must be connected to the air duct. This is done using a flange, which can be made of tin. The temperature at the attachment point will not be very high, so this material is quite suitable for these needs.

The homemade hot air gun is ready, but it still needs to be connected to a power source. And here everything depends on the type and complexity of such a source. It’s good if this is a model that allows you to regulate the supplied voltage, because in this case the product can have smooth power adjustment, which is especially convenient during operation.

There are times when a finer diameter nozzle is needed. This can be achieved in different ways, but the most interesting is to use a glass tube purchased from a medical equipment store. This tube is made of tempered glass, which allows it to be used at high temperatures.

Soldering iron design option

You can make a homemade soldering gun from a regular soldering iron. Although this device has some disadvantages, it is convenient, cheap and quick to manufacture, which is an undeniable advantage.

Such a soldering mechanism does not require any special costs or modifications, but the main disadvantage, which may seem significant in some cases, is that temperatures above 300 degrees cannot be achieved with its help. However, this is quite enough for working with SMD structures.

In order to make a hot air gun for soldering with your own hands from a soldering iron, you will need very little effort. First you need to select an air blower. In this case, an aquarium compressor is ideal.

The metal structure itself is removed, wrapped in foil and copper wire, thus increasing its heat capacity. After this, it is again tightly inserted into the wooden handle, in which a hole is pre-drilled for the power wire.

The sting is removed and a metal tube of suitable diameter is inserted instead, which will act as a nozzle.

All that remains is to hermetically seal the hole with the power cord and insert the hose from the compressor into the upper part of the handle, also sealing it tightly in the hole.

Now the simplest soldering gun is ready for use. After turning on the power, the corresponding part heats up. The air coming from the compressor is heated and comes out of the nozzle tube, which allows the resulting design to be used for soldering work.

Simple mini soldering setup

You can come up with countless models of a soldering gun - it all depends on the imagination of the master. For example, there is another version of the device, which is a miniature and convenient device. You can make it from a simple medicine bottle. Moreover, its capabilities are comparable to a factory-made soldering station.

All you need to make it is:

• Medicine jar.
• Capacitor housing.
• A good power supply that can regulate the supplied voltage.

The medicine jar is cut so that a small fan fits there, which should be installed at the bottom of the jar. A spiral is inserted into the aluminum case from the capacitor. Here they make a nozzle, and the entire resulting structure is tightly inserted into the neck of the jar. Then you need to remove the necessary wires and tape the bottom of the jar to the rest of the structure with electrical tape.

Thus, it turns out to be a simple and very easy-to-use hot air gun for soldering. At the same time, the power supply on the controller allows you to change the required temperature depending on the need for the work being carried out.

Source: https://goodidey.ru/delaem-v-domashnix-usloviyax-payalnyj-fen.html

Soldering gun

For a long time, radio electronics enthusiasts were forced to use a standard soldering iron with a copper tip to solder elements. But over time, the size of microcircuits and their components decreased and the use of a tool such as a soldering iron became difficult. It was replaced by a soldering hair dryer, or, as it is also called, a soldering hair dryer.

Soldering gun

This tool has become an indispensable assistant in everyday use for various jobs. The stores offer a large selection of soldering guns of different configurations. The cost of some of them is very high, so some people prefer to assemble this useful tool themselves. Doing this does not require much effort or knowledge.

Operating principle of a hot air gun

A soldering gun is in many ways similar to a construction gun, but has less power, compact dimensions and attachments. It works as follows: after pressing the power button, the heater and fan start working. The fan draws in air and through a small hole, heated air is supplied to the area that needs to be melted. Once the required melting temperature of the solder is reached, you can attach or disconnect microcircuit elements, etc.

Features of soldering hair dryers

A soldering hair dryer is used when working with low-melting alloys and metals. In addition, it is often used to remove paint coatings from the surface of old parts and when they are heated. The temperature of the air leaving the hair dryer nozzle reaches 800 °C. It is regulated using a special relay, but besides this, the temperature depends on the voltage used, the fan and the distance to the heated object.

Working with a soldering iron

The nozzle is made of heat-resistant materials and has a specific design that is convenient for use in one hand, if it is not a stationary soldering gun.

Hot air gun design

The main parts that make up a soldering hair dryer are similar to the elements of other heating devices:

1. Lever. It is made from heat-resistant materials with the expectation that it will withstand high temperatures. For example, ebonite, ceramics, porcelain. In addition, the handle can be wrapped in heat-resistant fabric, which will also reduce the surface temperature.
2. Frame. The same requirements apply to it as to the handle.
3. Nozzles Most often this is a steel tube with a small hole diameter. The use of other metals is not recommended due to less durability or higher cost.
4. A heating element. A small radius nichrome wire is used, which holds its shape well when heated.
5. Fan. It is installed on the back side of the soldering gun and supplies air to the heating element. It must be small for convenient use of the tool.

Soldering gun deviceAttachments for hot air gun

Main characteristics of a soldering hair dryer

There are several parameters that you should pay attention to when choosing a hair dryer for soldering - voltage and power.

To successfully solder computer chips and radio components at home, the power should be at least 100 watts, but more is better.

Let the resulting temperature be higher than necessary, it can be adjusted using a relay, wire or distance to the heated surface. In industrial soldering guns, the power reaches 1.7 kW or more.

Recommended voltage range 24-36 Volts. Smaller values ​​will not allow you to achieve the required power, and larger values ​​can be dangerous. Additionally, the voltage will depend on the resistance in the heater wire. It is recommended to use nichrome wire with a resistance of 6 Ohms for a voltage of 24 Volts.

It’s easy to assemble a hot air gun with your own hands from a simple soldering iron. The question arises, why are we upgrading the soldering iron? The answer is simple: there are often situations in which it is not possible to melt solder with a regular tip.

The design of such a device is simple and anyone can assemble it. To make it, you will need a regular pen with a wooden handle and a standard power of 40 watts. To supply air, you need a source of compressed air. An aquarium compressor is suitable for this.

It is necessary to remove the tip and leave the heating element unchanged. We make a hole in the wall and bring the power wire out through it. We glue a sleeve to the rear end of the soldering iron in which a tube connected to a source of compressed air will be attached. We seal the places where the wires pass.

In the metal part of the device, you need to cover the holes with foil, then wrap it with copper wire - this will increase the heat capacity. To replace the tip, you need to install a steel tube of the same diameter so that it holds well and does not fall out during operation. Such a tool usually allows you to heat the surface up to 300 °C.

The operating principle of a DIY soldering gun is as follows:

The air enters the heating element, the heat capacity of which was increased by wrapping the tube with foil and copper wire. Next, the heated air enters a steel tube installed instead of a tip, and through a hole in it is directed to the heated surface.

The disadvantages of such a device include the fact that there is no way to regulate the temperature and it is not high enough for some metals. It can be increased by changing the airflow. This tool, assembled with your own hands, will allow you to work with some radio circuits, but will not be able to replace professional equipment, such as a soldering station.

Mini soldering station with great capabilities

Such a station can be made, for example, from a plastic medicine jar. This device is very compact. It consists of a tube with a spiral installed inside (you can find one in old capacitors) and a fan.

No handle is required for the station, and the power supply on the controller allows you to adjust the temperature.

Such a tool, assembled independently, is comparable in quality to the original store-bought version.

How to properly assemble a hot air gun with your own hands

Before you start assembling a homemade soldering gun, you need to make a heating element spiral. A wire with a cross-section of 4 to 7 mm is used with tension, onto which a nichrome spiral (sometimes made of fechral) is wound. The required cross-section should be 0.5-0.6 mm.

The spiral should be wound onto a tubular base in neat, uniform turns. It is important to ensure that the turns do not touch. A layer of asbestos or fiberglass is placed on top of it, which should be secured with heat-resistant glue.

The ends and exit points of the spirals should also be covered with a layer of glue.

Hot air gun assembly diagram

Then, a tube is installed on the layer of glue to isolate the incoming heat from the coil. It is made from high-temperature resistant materials, such as ceramics. The ends and exit points of the spirals should also be covered with a layer of heat-resistant glue

The outputs of the spiral must be brought out and connected to the power drive using screws on the mount. It is important that it has heat-resistant insulation. The wire must be routed through the starting switch and rheostat. This will make it possible to regulate the voltage.

On the other side of the soldering gun, a fan or other air supply element to the heater is installed. If it is not possible to install it on the body of the hair dryer, then you can use a bushing to install a tube through which air will be supplied. The wires from the fan are also connected to the switch so that it is possible to control the air flow.

The nozzle is then attached to the body. It is recommended to provide a design that allows you to replace the nozzle with others of different diameters.

Necessary tool

In order to make a soldering hair dryer with your own hands, you will need the following tools:

• jigsaw;
• pliers;
• hacksaw;
• electric drill;
• ruler;
• calipers;
• glue brush;
• vice;
• electrical measuring instruments;
• soldering iron;
• screwdrivers.

With this minimal list of tools, you can make a simple soldering iron yourself.

Design of a homemade hair dryer for soldering microcircuits

It consists of the same parts as indicated above. The body deserves special attention, so below we will describe in detail how to make a hair dryer body for soldering.

DIY soldering gun

During production the following are used:

• Materials with good thermal insulation properties.
• Good insulation of hot spots.

In the first case, difficulties may arise in obtaining them and manufacturing a housing of the required dimensions. In addition, some materials cost a lot of money.

An unnecessary hairdryer works well as a body. The place to which the nozzle will adhere must be made of heat-resistant substances that can withstand high temperatures. In addition, it is necessary to design the case in such a way that the heat is not transferred to other places and it is comfortable for a person to hold the handle of the soldering gun without the use of gloves and heat-resistant mittens.

The hair dryer nozzle must be made of metal, for example steel, because... it may come into contact with heated surfaces.

You should wisely choose a place for switches and regulators for convenient use during operation. They can be used from old household appliances.

A homemade hot air gun will be a good helper in everyday life and will make many tasks easier and save money. The cost of assembling it is disproportionately less than buying a new soldering gun in a store.

Source: https://stankiexpert.ru/spravochnik/svarka/payalnyi-fen.html

Features of making a soldering gun yourself: requirements for the device, ideas for creating a device

When household appliances break down, not everyone is happy with the prospect of visiting a service center and paying a certain amount of money for repair work. Sometimes many people want to learn how to fix minor problems on their own. But for most, this dream remains unfulfilled.

This is hampered by the high cost of professional soldering equipment. After all, today household appliances have reached such a level that only a soldering iron and tweezers are not enough to repair a TV.

Each device uses printed circuit boards, which can only be returned to working condition by having a reliable soldering device on hand.

Many people try to get out of this difficult situation by making a soldering gun with their own hands. However, you must take into account that the cost of making it for you can range from 2 to 20 thousand rubles. But even if this is your first time doing such complex work, you still shouldn’t refuse it . If you can cope with this task , then you will have a DIY tool that you can use more than once to repair household appliances.

Soldering Basics

Before you start making a soldering hair dryer using a soldering iron or a regular hair dryer, it won’t hurt you to first find out how the soldering process works using this tool. Thanks to this information, you will avoid many errors during assembly and will be able to produce a properly functioning unit.

Features of the desoldering and soldering process

Now it’s time to find out how desoldering or soldering of a specific microcircuit is carried out.

• The first step is to tin the contacts. An ordinary soldering iron can help you with this - just run it along the line of contacts.
• For soldering you will need PIC solder and soldering acid. You can do this job with a hairdryer, but you will still need to use a soldering iron to apply the solder.
• At the next stage, thoroughly clean all the tracks between the contacts with a needle. This is necessary so that during soldering you do not inadvertently solder the tracks together. At the same time, you need to make sure that there are no tracks soldered together on the board.
• Then you can proceed directly to installing the chip in place. To place it you will need tweezers, and its fastening is done using a soldering hair dryer, which needs to heat all the contacts evenly.
• During soldering, the hair dryer is moved around the microcircuit to uniformly heat all contacts. When you handle this, you need to carefully press the microcircuit onto the board with tweezers and blow on it. This will cool the contacts and help them solder faster.
• After that, we take a needle and find out whether all contacts have joined. If this does not happen with one of them, then you need to solder them and clean the paths between the contacts with a needle.

You shouldn't have any problems with soldering the microcircuit To do this, you need to move the hair dryer along the soldered contacts. After they all come off, you can remove the microcircuit. However, here you must make sure that all contacts have been heated evenly. Then they will come off easily. While performing this operation, it is important that the microcircuit does not overheat, otherwise it will no longer be suitable for further use.

Requirements for soldering equipment

• To ensure high-quality work, the selected soldering equipment must maintain a certain temperature regime.

For microcircuits, the acceptable temperature range is from 190 to 240 degrees. If the temperature is higher during soldering, then you risk overheating the chip, which will cause it to become inoperable. As a result, you will not only waste your time, but also lose an expensive part.

• Another characteristic that soldering equipment must have is a stable heating area and jet.

Compared to a miniature soldering station, a hair dryer is able to maintain the required heating temperature in a stream of air, which remains so even with small changes in the distance between the device and the printed circuit board. When using a hairdryer, the heating area remains stable. It is determined by a direct flow of air. But at the edges of the jet, the heating temperature turns out to be below the minimum permissible, which is why it not only cannot harm the circuit parts, but also melt the solder.

A soldering gun that creates an unstable cone-shaped stream of hot air that expands as it approaches and contracts as it moves away will allow you to get the job done quickly and efficiently. Often craftsmen who decide to make a hair dryer for soldering microcircuits with their own hands do not take into account the stability of heating and the uniformity of air flow, which makes it uncomfortable for them to work.

• Another requirement is safety and ease of use.

Speaking of safety, we mean that you will not make fundamental changes in the design of an electrical appliance, violating the factory design diagram of the connection nodes, especially if they have an operating voltage of 220 V. To be on the safe side, you can connect a home-made soldering device without directly, but through a transformer, which can be made from a computer power supply. This way you will protect yourself from serious troubles.

As for ease of use, this means that the device should be obedient in your hands and not require much effort to perform certain manipulations. The hairdryer should be designed in such a way that your second hand remains free. Then, with its help, you will be able to hold tweezers or perform other necessary actions.

There are many cases where home craftsmen were able to make a soldering device from an ordinary hair dryer, a hair dryer, and even a soldering iron. But in the latter case, serious alterations have to be made. The fact is that a soldering iron initially does not have special air supply devices, and creating them is much more difficult than a heating element.

Regardless of which of the devices listed above you decide to use as the basis for making a do-it-yourself soldering device, you need to make sure that the finished hair dryer can maintain the set temperature.

If you find a good hair dryer with a thermostat, then be prepared to make certain changes to its design. And this will inevitably lead to the fact that the temperature scale on it will not display the real indicators created by the device on the printed circuit board.

Therefore, we advise you to first test your homemade soldering device using a contact digital thermometer. If, after numerous tests, the temperature remains in the range of 190-240 degrees, then this means that your hair dryer is ready for use. If you observe some deviations, then you will have to additionally work on its design and bring the temperature indicators to optimal levels.

The most difficult thing is to make a soldering device from a soldering iron. The fact is that here you will not only have to stabilize the temperature, but also somehow solve the problem of air supply, and for this you will have to do everything from scratch.

• To create such a device for soldering, you will need a heating element, which is placed in a glass tube, and air will be supplied through it from the other end.
• You will have to get rid of the soldering iron tip.
• For proper operation, air must enter the tube directly through the coil, which, in turn, will heat it.
• The second end of the tube should be slightly longer than the first. Subsequently, you will connect a hose to it to pump air. As suitable mechanisms for this task, you can choose a converted aquarium compressor, a home-made bellows from a plastic bottle, or you can completely abandon such devices and pump air through your mouth.

the most problems arise when creating such (setting the temperature, the inability to adjust the heating intensity), you will have to spend a lot of time and effort on making it, but even in this case you will not be sure that such a hairdryer will maintain the parameters you set . It is best to use a regular cheap hair dryer as a base, and you can use a soldering iron for other purposes.

Soldering hair dryer from a car cigarette lighter

If you have no other options left, then you can make your own soldering hair dryer from a car cigarette lighter.

To turn it into a soldering device, you will need to weld a convenient handle to it and apply a voltage of 12-14 V, which can be obtained from the vehicle’s on-board network.

When using such a homemade hair dryer, the work surface will heat up due to the heat created by infrared radiation.

In fact, it is incorrect to consider this device even a hairdryer for soldering. It's more like a mini soldering station.

With this hairdryer you can heat the necessary areas on the printed circuit board, as well as solder the elements located on it. But do not expect that the soldering temperature will remain stable when using such a hair dryer. The temperature will have to be selected experimentally, and it will depend on the distance between the cigarette lighter and the soldering area.

Another disadvantage of such a homemade soldering hair dryer is that it will heat not only the elements that need soldering, but also the areas located near them. Therefore, work with such a hairdryer must be carried out using screens.

The advantage of such a device is that you will have to make minimal changes to the design of the tool and incur few costs.

Of course, the result of the first soldering may not satisfy you, but with experience you will surely cope with this and learn how to properly use additional screens and prevent overheating of the microcircuit.

The failure of household appliances is an unpleasant event that forces owners to contact service centers for repairs, paying a considerable amount of money for their services. But someone may want to learn how to fix minor problems themselves. Unfortunately, not everyone can take advantage of this opportunity due to the lack of special expensive equipment.

However, in reality, you can make soldering equipment yourself. To do this, you can use a hair dryer, a hair dryer, or a regular soldering iron as a base. And don’t be afraid of the difficulties that may arise when turning one of the above devices into a soldering device.

There are many diagrams on the network from which you can understand how, even without the lack of special knowledge, to make soldering equipment from a conventional device. You just need to carefully study all the intricacies of the process and repeat it, after which you will no longer need to contact service centers if a new breakdown of household appliances occurs.

Source: https://tokar.guru/instrumenty/payalniki/osobennosti-izgotovleniya-payalnogo-fena-svoimi-rukami.html

Purpose of a homemade hair dryer

You need to have an accurate idea of ​​what a soldering iron of this type is needed for. The device must create the melting temperature of tin in a certain place in the circuit. When melting the mounting alloy, a radio component is mounted or an unnecessary element is removed from the board of any electrical device.

The hairdryer creates a directed hot air flow to the place where the board circuit needs to be soldered. Under the influence of high temperature, tin turns into a liquid state, thereby enabling the worker to carry out the necessary installation operations.

Design of a soldering iron hair dryer

Based on the fact that it is necessary to obtain a stream of hot air, the design of the soldering device is formed. A homemade soldering hair dryer made with your own hands consists of the following elements:

• heater;
• heater insulation;
• fan;
• nozzle;
• hair dryer body;
• body handle;
• control circuit;
• soldering iron holder.

Location of the main components of the hot air gun

Heater

Nichrome wire in the form of a spiral is used as a heater. To do this, you can use a simple spiral from an old household hair dryer. The spiral must be of such a diameter that there is a gap between the heater and the air duct body.

When winding a spiral, one end of the wire is threaded inside the heater, so that two ends of the conductor come out to connect to the power source. To insulate the spiral, it is wrapped in mica.

Heater insulation

In order to avoid heat loss, the heater spiral is insulated from the heater body. One of the insulation options is mica. Mica reliably isolates the spiral from the air duct tube. The fragile material is glued onto fiberglass.

Fiberglass is a good heat insulator. To glue mica to fiberglass, use rubber glue or the universal Moment product. In some cases, mica is glued onto paper. Subsequently, the glue and paper will burn out, but the mica will remain in the form of an insulating tube.

Air duct

The shells of various radio components, for example, resistor or resistance housings, are used as the air duct (casing) of the heater. You can use any steel tube of suitable diameter. The edges of one end of the tube will have to be rolled. This is necessary to ensure that the nozzle is securely held in the outlet of the tube.

For example, take an old C-5-5 resistor and carefully remove the rolled edge on one side of the shell with a file. The inner filling is removed and the air duct tube is ready.

Important! Following the advice of the “masters,” a ceramic or quartz glass tube is used for the air duct. If flux accidentally gets on the surface of these materials, the tube is destroyed. Therefore, the best material for this part would be steel.

Fan

It is quite possible to use a cooler from a computer operating unit as an air blower. The fan has dimensions in terms of 40 x 40 mm, which must be taken into account when forming the body of a homemade hair dryer.

Small fans can be found in old household hair dryer housings. In this case, you need to choose a device that is acceptable in terms of power and dimensions.

Nozzle

The nozzle is designed to concentrate and focus the air flow. To make the element, a metal washer is taken. The ring is deformed with a core so that it takes the shape of a bowl.

The nozzle is placed in the outlet of the air duct. The washer rests with its edges on the curved edge of the tube and does not fall out.

Hair dryer body

The body of the soldering iron can be cut from a tin can. Tin sheet 0.3 mm thick is an ideal material for making a hot air gun with your own hands. Bends are made at the joints of the sheet metal. Small holes are drilled into them, screws are inserted into them and tightened with nuts.

Cutting sheet metal for hair dryer body

Note! The use of tin is not a dogma. For homemade cases, any heat-resistant material is used. This can be construction plywood, textolite and even laminate.

The main requirement for the layout of the parts of a closed hair dryer chamber is its tightness. All joints of housing elements must fit tightly to each other. This is necessary to ensure the required pressure of the air flow pumped by the fan. The camera elements are connected with screws. Due to the high temperature inside the case, glue is not used.

Case handle

According to the advice of amateur craftsmen, the body of a disposable plastic syringe is well suited for the pen. The syringe has ears in which holes are drilled. The same holes are made in the body of the hair dryer. The handle is screwed to the hair dryer with screws, nuts and washers. To ensure reliable fastening, spring washers – “grovers” – are placed under the washers.

Control circuit

To solder a microcircuit with your own hands using a homemade hot air gun, you need a unit for adjusting the operating modes of the soldering device. These are two modes: setting the desired heater temperature and adjusting the number of revolutions of the fan blades.

The basis of the control unit is a transformer with two secondary windings. Instead of a transformer, you can use a power supply from an old computer or fluorescent lamp ballast. There are many options, as long as the heater and cooler resistances match the power sources. To adjust the operating modes of the hair dryer, two variable resistors are included in the control unit circuit, the control knobs of which are located on the surface of the unit body.

A detailed version of the control unit diagram for a hot air gun for soldering microcircuits with your own hands can be found in Internet publications.

Soldering iron holder

The holder is an important part for a soldering device. The fact is that a simple hair dryer holder frees the technician’s hands for positioning the wiring diagram in front of the soldering iron air duct, as well as for removing and installing radio components on the board.

The stand is made massive to prevent the entire soldering structure from tipping over. To do this, use a sheet of metal 100 x 100 mm and at least 20 mm thick.

The holder is made of tin, bending it to the size and shape of the hair dryer handle. The holder is placed on the stand with the input groove facing up. The bend of the tin element is secured to the stand with screws through drilled holes.

Additional Information. A soldering iron can be a mobile device. In this case, a frame with clamps is made in which the board being processed is fixed in a vertical position.

Homemade mobile hot air gun

Heating temperature of the coil

Changing the soldering iron temperature using a dimmer

When working with a soldering gun, you need to pay attention to the temperature of the air flow. For soldering and dismantling radio components and microcircuits, heating up to 600-7000C is considered a sufficient temperature.

The heating temperature can be approximately determined visually. The glow of the red spiral of medium brightness corresponds to heating in the range of 650-7500C. To be precise in determining the value of this parameter, a thermocouple is used.

The thermocouple is brought to a stream of hot air and, using a variable resistor, the desired temperature level of the air stream is set. You need to know that heating to 15000C or more will melt the nichrome spiral.

The article presents one of the options for making a soldering gun with your own hands. When creating a homemade soldering iron design, you need to take into account the safety of using the device.

How to make a dimmer for a soldering iron

Source: https://amperof.ru/elektropribory/payalnyj-fen.html