How to choose a TIG machine

How to choose a machine for argon arc welding?

Rikon-S LLC reminds that argon arc welding (TIG) is welding performed in an argon, inert gas environment, using consumable or non-consumable (tungsten) electrodes.

Mandatory factors to consider when choosing a TIG machine

In order for welding work to be carried out successfully, it is necessary to choose the right welding machine that is optimally suited for this type of welding. Here's what's important to consider:

• If welding work will be carried out on aluminum, then it is worth using universal argon arc installations. They need to be characterized by the ability to use direct and alternating current, which is indicated by the letter symbol TIG AC/DC.
• If welding work is required for metals with small thickness, then it is necessary to use devices with a pulse mode.
• If you need to weld metal with a thickness of up to 6 mm, then you may prefer settings up to 150-200 A, and if the thickness is greater, then from 250 A.
• If you plan to work continuously with current values ​​above 180 A, it is better to purchase a TIG torch with liquid (water) cooling and the corresponding unit for it. It is clear that at lower DC values, air-cooled systems can also be used.

Useful information

Please also pay attention to a number of functions that may or may not be present in the device. Let's take only the basic options available in most common models.

This is the name of non-contact ignition, which operates from a high-frequency current pulse without touching the product. An oscillator is closely connected to it; this is a block responsible for contactless ignition of the arc.

This is polarity balance, it is present in alternating current devices. Needed to adjust the amplitude of the + and - half-waves.

Airflow is required at the end of the weld when it is exposed to the open air, which can reduce its quality characteristics. This option allows you to control the blowing time.

Needed in pulse welding when work is performed on thin sheet metals and workpieces.

Required to improve quality, especially in the final segment, as it is responsible for the smooth fading of the arc.

We hope that the information received will help you choose the optimal equipment for welding work. If detailed professional advice is required, you can always get it from Rikon-S LLC.

Source: https://www.rikon-svarka.ru/articles/kak-vyibrat-apparat-dlya-argonodugovoj-svarki

Choosing an argon welding machine for the home: rating of the best models

Argon welding is an improved version of traditional welding. The main difference between this method is the use of argon gas during operation. An argon welding machine is used not only for professional welding, but also when working in an apartment or on a personal plot. Let's talk in more detail about the distinctive features of the method and about choosing a device for your home.

Argon welding principle

During normal welding work, one electrical wire is connected to the metal object being processed, and a second one is connected to the electrode. When they come into contact, an electric arc is formed. It is a plasma clot that has a very high temperature that can melt metal. It melts, as a result of which several parts are connected to each other.

However, this technique has one significant drawback - the metal at the processing site is highly oxidized, interacting with oxygen. As a result, the welds become less strong.

To combat this problem, an argon apparatus was created. The principle of operation of the device is to protect the surface being treated from chemically active substances (for example, oxygen contained in the atmosphere), it is coated with another substance. Its role is played by argon. It belongs to the group of inert gases. Their distinctive feature is their inability to enter into chemical reactions with other substances.

Therefore, if a layer of this gas is located above the workpiece, it will:

• Will not allow atmospheric oxygen to reach its surface.

• At the same time, he himself will not react with her.

Due to its physical properties and the design of the equipment, argon forms a kind of protective dome over the area being welded.

For welding work using this method, not only a standard set of equipment is required, but also an argon cylinder.

Device

An argon welding machine consists of the following components:

1. Main block . It is a transformer that connects to a 220-volt household electrical network. Increases the voltage and current supplied to the electrode so that an arc can form. Also converts alternating current to direct current.
2. Electrode holder . It is an improved version of the traditional electrode holder. In addition to the standard fastening, it has a gas nozzle. Argon flows into it through a special pipe. Using a nozzle, it evenly covers the workpiece being processed, protecting it from exposure to oxygen.
3. Portable control unit . An electronic device that connects to the main unit. It allows you to adjust the voltage and current on the electrode. On most models of devices, argon passes through it, so the intensity of the gas supply is most often adjusted here too.

In the absence of a control unit, the gas pressure is adjusted by turning the valve on the cylinder.

Scope of application

Argon devices are used both in professional construction and at home. Today, you can find many compact and simple models on the market that are intended exclusively for home use.

How to choose

When choosing equipment for argon welding, you should pay attention to a number of important parameters!

Equipment selection options:

• Possibility of fine tuning

The intensity of the arc must be adjusted. In this case, values ​​from the smallest to the largest should be available. This will provide the ability to work with various materials. If the arc cannot be “reduced” to a minimum, then processing thin metal sheets (no thicker than 1.5 mm) will not be possible. If you plan to weld thin metal sheets, then the machine should allow you to reduce the current to 80 A or less.

• Availability of pulse mode

In some devices, the electric arc is not constant, but occurs at certain intervals. The intervals between its occurrences are thousandths of a second. This mode of operation has shown greater efficiency than the traditional one. It moves molten metal better, does not require contact of the electrode with the workpiece, and reduces the risk of oxidation at the seams.

If a person has not had welding experience before, then he will definitely make mistakes at the initial stage. The most common is untimely separation of the electrode from the workpiece, which leads to “sticking”. It can not only cause equipment damage, but also cause harm to health. Therefore, the device must have a protection system that automatically turns it off in such a situation.

• Reviews from real owners

The manufacturer of the equipment does not always report problems during its use, operating nuances, or shortcomings. This is due to the desire to sell as many of their products as possible. Therefore, before purchasing, it will not be superfluous to read the reviews of people who already own the equipment. You can also study reviews and reviews from independent experts.

What welding machine do you use?

ArgonInverter

If you plan to work with metal workpieces of large thickness, then the equipment must have a current strength of at least 200 A.

• Possibility of working with alternating current

Steel, copper and iron are welded using direct current. However, some metals cannot be processed with it. In particular, this applies to aluminum, as well as alloys with magnesium. The fact is that they are capable of oxidizing on their own, even without the participation of oxygen, therefore, argon cannot protect them.

Direct current helps with this.

Sometimes, to make it easier for the buyer to understand what materials can be processed using equipment, a list of metals available for work is indicated in the technical passport. This eliminates the need for a detailed study of the technical characteristics of the device.

best models

Below are several argon welding machines that have proven themselves in their work.

Gigant TIG-200

The Gigant TIG-200 is a low-cost, affordable welding machine. It costs in the range from 15,000 to 17,000 rubles, so it is accessible to almost everyone.

Here are the main technical characteristics of this device:

• The maximum possible power is 7,100 W.
• The maximum possible current is 200 A.
• Overall dimensions 45 x 25 x 33.5 cm.

Source: https://tehno-gid.net/power/vybiraem-argonovyj-svarochnyj-apparat-dlya-doma-rejting-luchshih-modelej.html

How to choose an argon welding machine

TIG welding is most often used where the appearance of the weld is important or where the metals being welded are thin and precise control of arc parameters is necessary. Argon arc welding allows you to weld aluminum, copper and other non-ferrous metals.

Choosing a argon arc welding machine is quite simple if you know what criteria to adhere to.

TIG welding using a tungsten argon electrode is a very precise welding method that produces a clean, neat weld with no metal spatter and no fumes.

Argon arc welding is popular among car enthusiasts, restorers, home craftsmen, and is used by metal sculptors.

The TIG method is used to weld thin stainless steel parts, chrome-molybdenum pipes, aluminum and copper parts. These materials require very precise control of the arc, since if overheated, the part will deform or burn through. Tig welders, which produce a stable arc at low amperage, are best suited to solve such problems.

How to choose argon arc welding machines

When choosing a argon arc welding machine, you should be guided by the following criteria:

Current range

When choosing a TIG welding machine, the amperage range should be given special attention. The wider the operating current range, the better. A machine with a narrow range will significantly limit your ability to weld different materials. A welding machine with a range from 5 to 230 amperes will allow you to weld stainless steel with a thickness of 0.6 millimeters and aluminum with a thickness of 6.3 millimeters.

Welding aluminum parts requires more current than welding stainless steel. A welder with a 200-amp operating range will limit your ability to weld aluminum sheets between 3.2 and 4.8 millimeters thick. Thus, the wider the operating current range of the welding machine, the more different problems it can solve.

Lowest operating current

When choosing a argon arc welder, you should also pay attention to the stability of the arc at a current strength of less than 10 amperes. This determines the ease of arc formation and good arc control. Tungsten welding is often used to weld thin sheets of metal. In this case, it is better if the arc is formed without using high frequencies or a hot start.

Some welding machines are equipped with a function for facilitating arc formation - hot start. With a hot start, a higher current is applied to the electrode for a few milliseconds to start the arc. A hot start risks burning a hole if you are cooking thin sheets. In addition, a hot start does not guarantee a stable arc during the welding process and does not allow the welder to accurately control the arc.

The stability of the welding arc is important not only for the formation of the arc, but also for the quality of the welding process as a whole. For example, when repairing a propeller for a boat motor, you need to weld the corner joint. At the same time, it is very important not to burn a hole in the material and it will be extremely inconvenient to work if the arc keeps jumping off.

The stability of the welding arc is also important when completing a weld. In TIG welding, during the completion phase of the weld, the amperage is usually reduced to fill the cavity at the end of the weld.

When welding aluminum, a large cavity at the end of the weld can cause cracks to form in the material as the part cools.

Good control of the welding arc with a gradual decrease in the working current prevents the formation of a large depression at the end of the weld and promotes a smoother cooling of the weld pool (area of ​​molten metal).

Some TIG welding machines are equipped with electronics that provide a stable start of the welding arc at low operating current and a smooth reduction in current at the end of the weld, both with alternating and direct current.

AC and DC welding current

If you plan to weld not only steel and stainless steel, the welding machine must be able to weld with both alternating and direct current. Alternating current is used when welding self-oxidizing metals such as aluminum and magnesium alloys. Direct current welds steel, stainless steel and copper.

When welding with alternating current, the current constantly changes from positive to negative. When aluminum is welded, the surface of the metal is cleaned of oxides by a positive current, and melting is carried out by a negative current.

When choosing a TIG welding machine, pay attention to the ability to adjust the balance of positive and negative operating current. This will allow you to change the welding time with a current of a certain polarity. In other words, this will allow you to control the oxide cleaning time and melting time. Not all devices on the consumer market allow you to control this parameter.

Ease of use

Argon arc welding requires a fairly highly qualified welder. A good welding machine is easy to use and has intuitive controls.

The wear-resistant, metal pedal for controlling the working current greatly facilitates the welding process and allows you to accurately increase or decrease the working current as needed. The amperage control pedal is a must-have accessory for aluminum welding.

Welding cold aluminum requires more amps. However, aluminum heats up quite quickly during the welding process.

A foot pedal allows the current to be reduced as the aluminum heats up. This makes it possible to maintain a good electrode conduction speed and allows you to obtain a high-quality weld with a constant profile.

The pedal allows you to smoothly reduce the current at the end of the weld, which ensures proper filling of the cavity at the end of the weld. There are also manual operating current regulators on the market.

However, using them is as convenient as using a car without a gas pedal.

What else to pay attention to

TIG welding machines are equipped with fans for cooling. At the same time, the fan can run continuously or be turned on by a temperature sensor when the electronics heat up.

A constantly running fan draws in dust and dirt, which shortens the life of the welding machine.

In turn, the fan, which turns on when heated, changes the temperature of the internal environment of the device from hot to cold, which is also stressful for the electronic components. Ideally, the fan should only cool the boards when absolutely necessary.

Some welders turn on the fan when a welding arc is formed and the fan runs for several minutes after welding is completed. This reduces the amount of dust sucked in as the fan turns on when needed. At the same time, such a system does not greatly change the temperature inside the device.

Replacement burner

Sometimes, during the process of welding with a tungsten electrode, it becomes necessary to change the torch to a lighter or longer one for welding in hard-to-reach places. Some welding machines are equipped with a non-replaceable torch. If the burner of such a device becomes unusable, you must contact a service center to replace it.

Source: https://steelfactoryrus.com/kak-vybrat-argonovyy-svarochnyy-apparat/

Tig welding machine

The argon arc welding (TIG) method is used to join stainless alloys and non-ferrous metals. It is also used for welding ferrous metal in cases where appearance is especially important or when thin-rolled workpieces are joined. The method requires special equipment - a argon arc welding machine and sufficient welding skills.

Tig welding machine

Argon welding equipment

Manufacturers offer many models of devices with different configurations and functionality. Equipment for argon welding can operate in several modes:

• Manual. The welder manually feeds the welding wire and operates the torch.
• Semi-automatic. The wire is fed into the working area at a constant speed by a special mechanism. Gas is also supplied through the burner.
• Auto. Argon arc welding is carried out in a sealed volume filled with shielding gas. The welding module moves under the control of an external operator or according to a program embedded in it. For use only in industrial environments.

Manual weldingSemi-automatic machineAutomatic welding machine

Equipment for argon arc welding, depending on its purpose, is classified into one of the following types:

• Universal. Argon arc devices for a wide range of applications. This includes most of the models on the market.
• Special. Industrial devices modified for a specific type of operation on similar parts, for example, I-beams or main pipelines.
• Highly specialized. To perform one operation with parts of the same standard size. Used in mass production. When changing parts, they require readjustment and replacement of some parts and equipment.

The modern type of welding units are inverter-type argon-arc devices. They undergo a multi-stage conversion of the alternating voltage of the supply network into a direct voltage of low voltage and high power.

Argon welding machines are characterized by:

• compactness;
• light weight;
• stability of operating current parameters;
• stability of arc parameters;
• facilitated arc ignition;
• protection against electrode sticking;
• independence from voltage fluctuations in the supply network.

Inverter argon arc welding machine

They have practically replaced outdated welding transformers and rectifiers. The cost of argon devices is affordable for the home craftsman, but remains considerable. It is not difficult to master such a argon arc welding machine due to the large number of service functions that make the work easier.

The argon welding machine is equipped with a mechanized supply of welding wire and a gas supply through the torch.

Tungsten electrode torch

During argon arc welding, special torches with a tungsten infusible electrode are used. It is not consumed during welding, but serves only to create an electrical circuit to ignite and maintain the welding arc. A reinforced hose is also attached to the burner, through which gas is supplied from the cylinder. Some models are equipped with water cooling to operate at particularly high currents. The main parameters of the burner are:

• operating current;
• cooling type;
• length of cable/hose;
• control method: push-button or valve;
• type of connector for connection to the main unit.

Tungsten electrode torch

When choosing a torch, you should check its compatibility with the existing argon arc apparatus.

How to choose a device for home work

If you need to choose a welding machine, it will be useful to have a clear idea of ​​the types and volumes of work to be done. If you need to weld a couple of parts, then an expensive argon arc device will not pay for itself. It will be easier to contact a specialist. If you plan to open a small auto repair or specialized welding business, then a productive multifunctional unit may well justify itself.

The next stage is to study the reviews of experienced craftsmen and their experience in operating a particular device.

Vega device suitable for home work

The most significant parameters when choosing are:

• Operating current.
• Operating modes.
• Ease of use and ergonomics.
• Cooling system.
• Burner connector type.
• Price/functionality and price/quality ratio.
• Equipment.

Any additional equipment increases the price of the kit, but is cheaper in its composition than if purchased separately. It remains to decide whether you really need it.

Alternating and direct welding current (AC DC)

Most argon arc machines provide a constant welding voltage to the electrode. They are used to cook ferrous metals and stainless alloys, copper alloys and a number of non-ferrous metals.

If you plan to argon arc welding of aluminum or magnesium alloys, then you should choose a model with the function of supplying both alternating and direct voltage. Reversing polarity 50 times per second avoids oxidation of light metals during welding.

AC and DC welding current DC welding

An important additional function of the argon arc apparatus is to adjust the balance of positive and negative current during operation. The shape of the pulse changes in such a way that the phase of positive polarity is shorter than that of negative polarity (or vice versa). This makes it possible to find the optimal relationship between the phase of cleaning from oxides and the actual heating of the workpieces.

Scope of application and features of argon arc welding

The main area of ​​application of argon arc welding (or TIG method) is welding of thin-walled products, the thickness of which does not exceed 6 mm. This method is universal because it allows you to weld both non-ferrous metals and stainless, low-carbon, low-alloy steel. Moreover, this can be done in any spatial position.

TIG welding provides a neat, strong weld without smoke or metal spattering. Before starting work, special attention should be paid to the choice of shielding gas. The most common gases used to protect the weld pool are helium and argon.

With porous metal, oxygen is mixed with argon (up to 3-5%), which provides more active protection of the seam from the negative influence of atmospheric air. This also eliminates the risk of pores or cracks in the weld.

However, you should always remember that when welding, pure argon does not protect the metal being processed from moisture or dirt, which can be on both the filler material and on uncleaned or poorly cleaned edges.

Operating principle of TIG welding

Tungsten Inert Gas (TIG) is a manual argon arc welding process using a non-consumable tungsten electrode protected by an inert gas.

During the creation of an arc between the electrode and the metal part, gas (argon or helium) is supplied from the nozzle, which acts as protection for the weld pool and the electrode. The latter is located in the middle of the nozzle and does not melt.

During the welding process, gas must flow constantly - otherwise the seam will turn out to be of poor quality. If it is necessary to supply filler material to the welding zone, a manual or automatic method is used.

The main advantages of TIG welding

• Highest weld quality. TIG welding allows you to qualitatively weld even aluminum - a metal that is quite finicky to process. The thermal conductivity of aluminum is almost 5 times higher than that of other metals. Due to these thermal conductivity characteristics, at the beginning of the welding process, heat spreads very quickly from the beginning of the contact and throughout the entire aluminum part, while the penetration depth remains small. The use of shielding gas avoids this situation. Also, when welding aluminum, it is important to ensure a low temperature at which it begins to melt, since the metal in the molten state does not change its color. Only an experienced welder can “recognize” this transition.
• Precise maintenance of penetration depth. This parameter is one of the most important when working with thin metals, as it eliminates the risk of parts not being properly welded and, conversely, burning through metal elements.
• Versatility. Using argon arc welding, metals can be joined in various spatial positions - vertical, horizontal, bottom or ceiling.

What do you need to consider to get a quality seam?

In order to get a high result of your work, you must also consider the following points:

• The welder must have sufficient experience, since when welding, you need to hold the torch with one hand and apply the additive with the other hand (if necessary). Only a true professional can handle this task.
• Understanding the essence of the argon arc welding method and following the recommendations. In addition to dexterity and relevant skills, the welder must know that when using the TIG method, the torch should be held at a certain angle, namely 15-40 ° C relative to welding. Otherwise, the connection will be fragile and, as a result, unreliable.
• Welding machine. A guarantee of obtaining a high-quality seam, subject to the above points, is the use of reliable welding equipment. It is better to give preference to products from well-known brands that have long proven themselves on the Russian market on the positive side.

What criteria should you pay attention to when choosing a TIG welding machine?

• Current range. One of the important criteria when choosing a welding machine for argon arc welding. The narrow current range limits the possibilities when working with various metals. For example, a unit with a range of 5-230 A allows you to weld aluminum with a thickness of no more than 6.3 mm and stainless steel with a thickness of 0.6 mm. Welding aluminum parts requires more operating current than joining stainless steel workpieces. Welding equipment with a current range of 200 A does not allow working with aluminum, the thickness of which ranges from 3.2 to 4.6 mm. That is why the larger the range of operating current, the wider range of problems you can solve.
• Lowest operating current. When purchasing a welding machine for argon-arc welding, special attention should be paid to the stability of the arc at a current strength of less than 10 A. The ease of formation of the arc and its adjustment during further work depend on this parameter. Thin sheets of metal are welded using tungsten electrodes, but high frequencies and hot starts should be avoided. The “Hot Start” function does not ensure arc stability and deprives the welder of the ability to accurately control it during work. Also, when using this function, there is a high risk of burning through a thin metal sheet. It is important to ensure arc stability at the end of the welding process - at the completion of the seam. During the final stage of TIG welding, the amperage is usually reduced to fill the cavity at the end of the weld.
• Alternating and direct current. If you plan to weld not only stainless steel, but also aluminum, then you should choose welding equipment with alternating current (AC) and direct current (DC). For example, alternating current is used for welding magnesium and aluminum alloys (self-oxidizing metals), and direct current is used for copper and stainless steel. When working with alternating current, it changes from positive to negative. When connecting aluminum workpieces, a positive current cleans the metal surface of oxides, and a negative current causes the material to melt. When choosing a welding machine for argon arc welding, pay attention to whether it is possible to adjust the operating current balance from negative to positive and vice versa. This function will allow you to change the welding time with current of one polarity or another. Simply put, you will be able to control both the oxide purification time and the melting time.
• Easy to use. Most modern models on the market have clear control panels and are generally easy to operate. However, if you are going to work with aluminum, then the unit must have a pedal that regulates the current. The pedal will greatly facilitate the work process, allowing the welder to precisely reduce or increase the amperage as needed. Using a foot pedal, you can maintain a good speed of electrode conduction, resulting in an even seam with a constant profile. A smooth reduction in current at the end of welding ensures proper filling of the cavity. You can also find manual analogues for adjusting the operating current, but they are less convenient to use.
• Ventilation. TIG welding equipment is equipped with fans that can run continuously or can be activated by a temperature sensor when the device heats up. A constantly running fan draws dust and fine dirt into the device, which negatively affects the service life of the equipment. A fan that turns on only when heating changes the temperature of the internal environment of the unit (from hot to cold), which adversely affects the electronic components of the device. Some models of welding machines are equipped with a fan that turns on only when an arc is formed. The fan also continues to operate for several minutes after welding is completed. This approach minimizes the amount of dust drawn into the device and eliminates sudden temperature changes inside the welding machine.

Comparison of different models of TIG welding machines

An important factor for high-quality TIG welding, in addition to the experience of the welder and a suitable shielding gas option, is the welding machine itself. For example, when welding aluminum parts, you need to take into account the ability of the equipment to operate on alternating current. If you plan to work with various metals, then you should choose a device that operates on both alternating current and direct current.

Below is a comparative overview of models from various manufacturers, the prices and functionality of which are optimal.

The Aurora PRO INTER TIG 200 AC/DC PULSE Mosfet is based on inverter technology, which allows for a high level of welding work. The model has protection against network fluctuations; the arc is ignited using a non-contact method (NF). The “PULSE” mode is intended for performing particularly important and decorative welding work with different thicknesses of materials.

The Russian-made model KEDR TIG-200PN AC/DC 220 V is equipped with a pulse mode that operates on both direct and alternating current. This function ensures a constant penetration depth, which ultimately allows you to obtain a neat welding seam and the correct geometric dimensions. Arc ignition – non-contact (NF). Features of the model include air cooling of the burner and the presence of the “Arc Force”, “Hot Start” and “Anti Stick” functions.

The START WEGA 205 AC/DC Pulse is an inverter source for argon arc welding and stick electrode welding. The presence of a pulse mode allows not only to obtain a beautiful weld, but also to control heat input in the welding zone. Using a convenient panel, you can configure any arc parameters for specific tasks.

specifications	aurora pro inter tig 200 ac/dc pulse mosfet	cedar tig-200pnac/dc 220 V	wega 205 ac/dc pulse
power, kWt	4,5	4,5	4,8
current (min-max), and	10-200	5-200	5-200
pv at maximum current, %	60	60	35
voltage, V	220	220	220
dimensions, mm	395x153x301	380x132x235	410x146x278
Weight, kg	20	9	10
manufacturer country	China	Russia	China/Czech Republic/Italy?

When choosing welding equipment for argon arc welding, you should give preference to products from reliable manufacturers. This is the only way you will get high-quality welds, and the unit itself will serve you for a long time.

Source: https://zursvarka.ru/kak-vibrat-apparat-dlja-argonodugovoj-svarki

Aspects of selection of TIG welding inverters

A TIG welding inverter is a device that performs welding with non-consumable electrodes in an argon gas environment. Depending on what material is planned to be affected with its help, there are fundamentally different welding methods.

The equipment can produce direct electric current, the designation in this case will be with the prefix DC. This type of equipment is designed for connecting steel structural elements. A welder that produces alternating current is used when working with aluminum alloys.

Scope of argon arc welding

The high quality of the resulting seam allows the welder to be used in various fields, primarily for solving the most important tasks, such as the manufacture of tanks intended for high-pressure liquids, or oil and gas pipelines.

The welding machine ensures accurate execution of seams, as it eliminates metal spattering. An additional advantage of such a unit is the ability to weld structural elements of small thickness.

Also, in operation, an electric inverter welding using the TIG method is simpler than its analogues, meaning precisely the control of the parameters of the created arc.

Let's watch the video, the scope of argon welding and execution techniques:

However, despite a number of advantages from using such a device, there is also a disadvantage, which, in fact, determines the intended purpose of such equipment. Thus, an electric inverter welding using the TIG method requires certain knowledge and experience for free operation.

Therefore, it is not always easier and more effective to use this type of equipment in everyday life. But if you use an electric welding unit using the TIG method as a means of performing the manual welding method, then the connection of elements can be performed without the use of a cylinder, but through the action of coated electrodes. This opportunity is in great demand in everyday life.

Overview of characteristics for a successful choice

Welding machine diagram

The TIG welding electric inverter differs from other equipment of this type in that it produces different types of current at the output: direct or alternating.

Therefore, first of all, an electric welding inverter using the TIG method should be selected based on this parameter. If the designation indicates DC, then we are talking about direct current used for welding ferrous metal.

If you select an inverter welding machine using the TIG AC method, then only aluminum alloys should be used as the material. There are also versions that combine both options - AC/DC.

At the same time, an inverter electric welding machine using the TIG method produces direct or alternating current depending on the needs of the consumer. However, such designs will cost more, since they have a more complex circuit.

The TIG welding unit must also be selected in accordance with the power and current. The higher the last of these characteristics, the better the metal penetration.

Watch the video, features of choosing a device:

The TIG welding inverter produces a performance level that matches the current value: the higher the current value, the more efficient the machine will be. Accordingly, such equipment can cope with almost any task. An inverter for TIG welding when working with thin metal will provide even higher quality of the connecting seam if the design provides a pulsation function.

As a nice bonus, the TIG welding inverter can be equipped with an oscillator, the task of which is to support the possibility of non-contact ignition of the arc, which will save the user from having to do it himself.

By the way, the TIG inverter cannot withstand constant attempts to ignite the arc, which leads to poor results and a reduction in the service life of the electrode.

Popular makes and models

The TIG inverter today comes in different versions from different manufacturers. One of the leaders is the Brima brand. The range of models is represented by a large number of items, each of which differs in the level of performance and values ​​of electrical parameters. For example, the BRIMA TIG 180A welding inverter is designed to work with ferrous metal; accordingly, this device produces direct current.

The BRIMA TIG welding inverter in this version operates with a current in the range from 20 to 180 A. The design includes an oscillator, which allows you to connect metal 10 mm thick. The inverter welding machine manufactured by BRIMA TIG provides a stable arc even if you connect a cylinder with the mixture.

The device allows switching modes and switching to the MMA welding method. But it is not recommended to use the BRIMA TIG welding electric inverter in this mode all the time, since this is only an option and not the main functionality.

Power consumption is 3.2 kW, and the permissible load level on the BRIMA TIG welding electric inverter of this model at a maximum output current of 180 A corresponds to 60%. The cost of this option is around 15,000 rubles.

A slightly more functional device, an analogue from the same manufacturer, is a 200A TIG inverter. The operating current limit is 200 A. Otherwise, the values ​​of the initial parameters are identical.

Equipment in this version costs about 20,000 rubles.

Watch a video about model 165:

An alternative option to the device discussed above is the Telwin Force welding inverter. One of the versions is model 170 DC-LIFT VRD c. The device produces a maximum current of 150 A, a minimum value of 140 A. The inverter welding machine manufactured by Telwin Force can withstand a load level corresponding to 60% at 150 A.

The permissible electrode diameter is in the range from 1.6 to 4 mm. The Telwin welding inverter of this model is relatively lightweight, which makes it easy to transport.

In general, such a unit as the Telwin inverter welding machine is presented in a very wide range, which greatly simplifies the choice and expands the user’s capabilities.

Imported or domestic device?

Many people mistakenly believe that Russian devices by default are of low quality and low price. This is not true, because today the level of equipment offered to domestic users is at a high level. Some models, for example, the Svarog TIG 200P inverter welding machine, cost twice as much as their imported counterpart.

The price of this option is within 30,000 rubles. Moreover, this version contains an order of magnitude more possibilities than a device such as the Telwin electric inverter model 170 DC-LIFT VRD c.

When choosing, the user should be guided by a number of electrical parameters that characterize the level of efficiency of equipment such as a TIG inverter. And you should pay attention to the brand of the device secondarily, as well as the cost.

After all, the main task that an inverter welding machine manufactured by Telwin and other analogues must perform is to ensure high quality welds. It is quite possible to purchase an affordable unit, but in the end the user will be disappointed with the result of the work.

Accordingly, there is no fundamental difference whether a Telwin Force or Svarog welding inverter is purchased; the most important thing is the quality of the equipment, which you can first inquire about by studying the reviews.

Thus, if the choice is between a device such as a Telwin welding inverter or another domestically produced analogue, then the most important thing is to choose a suitable unit in terms of its level of performance and electrical characteristics.

Additionally, and with much greater priority, the issue of ease of use is resolved, which is ensured by how much the Telwin welding inverter or its equivalent weighs, as well as by the dimensions of the device and the presence of a handle for transportation. Cost should also not be decisive, since as a result of using cheap equipment, the user will be convinced of the veracity of the common expression: “the miser pays twice.”

Source: http://GeneratorVolt.ru/invertornyjj/aspekty-podbora-svarochnykh-invertorov-tig.html

Welding in TIG and MIG modes

Dear novice welders, this article is written for you. We have studied all the frequently asked questions about TIG and MIG welding and made a short article in which we answer these questions. Perhaps this will help you when working with equipment.  

For TIG welding you will need:

• Tig welding machine.
• Gas cylinder (Argon or Helium)
• Gearbox.
• Filler rod.

What should you pay attention to first?

• Most TIG machines weld metals using DC current. If you need to weld aluminum, you need to purchase a machine that welds metals using alternating current AC. A DC machine will never weld aluminum! Only AC current can be used to weld aluminum.
• TIG welding can weld: steel, aluminum, copper, titanium and two dissimilar metals. This process is ideal for welding hard-to-reach seams, S-shape seams, and corners. Welding with a TIG machine will allow you to make very thin and high-quality seams, especially where it is important that the seam is not noticeable. Since you yourself control the entire welding process using a welding torch, you will be able to make cosmetic seams, automotive seams, and weld thin metals.
• Gas. In 99% of cases you will need Argon. Helium is used very rarely, for example, the American Welding Association recommends using Helium for welding copper, but Helium is very expensive and that’s why everyone uses Argon. Gas is needed to prevent air from entering the weld pool, which will destroy the connection. Argon is an inert gas, it is harmless to breathe and non-explosive.
• Filler rod. As a rule, it is sold in tubes. When you bring the torch to the metal and current flows through the tungsten electrode to the products that you will weld, you will need to insert a filler rod. The current will melt the metal and filler rod, which in turn will form a weld. As the torch advances, the seam will cool and weld the product firmly.
• Gearbox. You will need a special reducer for Argon, which is attached to the gas cylinder.
• Tungsten electrode - before you choose a tungsten electrode, you need to understand what metal you will be welding; in principle, there is a universal option WC 20 (gray). If you weld aluminum, then the tip of the electrode needs to be sharpened in the shape of a ball, and if you weld steel products, you need to sharpen it in the shape of a sharp tip. You can sharpen the electrode on any grinding machine.

MIG welding in semi-automatic mode

In our opinion, one of the most practical types of welding is semi-automatic welding in an active gas environment.

For the correct operation of a semi-automatic welding machine, you will need carbon dioxide (CO2) or a mixture of inert gases, for example Argon + CO2, a reducer corresponding to the gas, as well as welding wire (solid or flux-cored.

During the welding process, welding wire and shielding gas are supplied from the torch nozzle. The task of the gas is to create a protective shell, pushing air out of the weld pool, thereby protecting the weld from oxygen and nitrogen.

A mixture of argon and carbon dioxide helps to increase arc stability and also improves seam formation when welding thin sheet metal.

To select the diameter of the welding wire below, we have provided a universal table

Metal thickness, mm.	0.5-1.0	1.0-2.0	2.0-4.0	5.0-8.0	8.0-12	12-18
Diameter of welding wire, mm.	0.5-0.8	0.8-1.0	1.0-1.2	1.6-2.0	2.0	2.0-2.5

At a gas flow rate of 20 l/min. carbon dioxide turns into dry ice. To prevent the reducer from freezing, we advise you to purchase heated gas flow regulators.

As a rule, the heating is connected to a 36V socket, which is equipped with most semi-automatic welding machines.

When choosing an apparatus, pay attention to the maximum wire diameter you can use. As a rule, all “household” devices have a maximum diameter of 1.0 mm.

The device settings are adjusted to this thickness of the welding wire and correct operation of the device is possible only if this diameter is observed. Industrial machines can weld with thicker wire.

If you take the device to the garage or to the country, you will only need a device that produces up to 140A. Many manufacturers make such devices with a maximum current of up to 180 Amps.

Usually inverter equipment is purchased, but some people like to work with transformer equipment. The inverter machine from the Svarog company EASY MIG 160 N219 can weld aluminum.

Buyers' choice. Semiautomatic machines for welding in MIG mode

Cable and panel sockets and plugs →← Selection of welding machines for beginners

Source: https://svarkamall.ru/stati/103-svarka-v-rezhimah-tig-i-mig.html

How to choose a argon arc welding machine

TIG welding is most often used where the appearance of the weld is important or where the metals being welded are thin and precise control of arc parameters is necessary. Argon arc welding allows you to weld aluminum, copper and other non-ferrous metals.

Choosing a argon arc welding machine is quite simple if you know what criteria to adhere to.

TIG welding using a tungsten argon electrode is a very precise welding method that produces a clean, neat weld with no metal spatter and no fumes.

Argon arc welding is popular among car enthusiasts, restorers, home craftsmen, and is used by metal sculptors.

The TIG method is used to weld thin stainless steel parts, chrome-molybdenum pipes, aluminum and copper parts. These materials require very precise control of the arc, since if overheated, the part will deform or burn through. Tig welders, which produce a stable arc at low amperage, are best suited to solve such problems.

Choosing a argon arc welding machine - 5 main principles

There are dozens, if not hundreds of argon arc welding machines on the market. The possibility of TIG welding is implemented in many modern models of manual arc welding inverters and in semi-automatic machines. The variety of options creates certain difficulties in choosing the right model, especially for a beginner.

To get started, you should answer 5 simple questions:

1. What types of metals will you be working with?
2. What is the thickness of the parts being welded?
3. Is it useful to weld structures less than 1 mm thick or made of stainless steel?
4. How intensively do you plan to use the device?
5. Do you have experience in TIG welding or are you just starting out?

The answers will determine the functionality that must be present in welding equipment in order for it to flawlessly cope with the assigned tasks. There are important differences between AC and DC devices. Direct current is required while welding various types of steel, copper, cast iron, etc. For materials such as aluminum, magnesium and metals with an oxide film on the surface, machines operating on alternating current must be used.

     D.C    Alternating current    

Various types of steels	Aluminum
Stainless steel	Magnesium alloys
Cast iron
Copper
Titanium alloys

There are also universal options. Their functionality determines the required type of current to be used for welding a specific type of metal. It's easy to distinguish them. The name of such devices often uses the abbreviation AC/DC (for example, FUBAG INTIG 200 AC/DC).

ANSWER #2. Welding current range

TIG welding of metal structures of a certain thickness is available in the appropriate welding current range. Let’s say the main scope of work is steel metal structures up to 6 mm thick. An inverter with a current of up to 200 A is suitable here. Welding aluminum 6 mm thick will require more than 200 A.

Well, a device with a range from 5 to 200 A will allow you to work with stainless steel up to 1 mm thick and aluminum up to 5 mm. Here we provide general recommendations for the INTIG series welding machines and for the most commonly used metals and thicknesses. This will help you navigate when choosing equipment for your tasks.

 Type of metal   Metal thickness, mm   Type of current     Current strength¸ A 

Steel alloys	1,0	DC	20 — 40
1,5	DC	40 — 70
4,0	DC	120 — 140
Aluminum	1-2	A.C.	20 — 60
4-6	A.C.	120 — 180
6-10	A.C.	220 — 230
11-15	A.C.	280 — 360

   

When choosing a device, pay attention to the stability of the arc at a current strength of less than 10 amperes. The parameter determines the ease of arc formation and the level of control. It is important to know that the starting current should be much lower than the operating current. This is especially critical for welding thin sheets of metal. .

If you have to weld metals of small thickness, then you should pay attention to argon arc welding machines operating in pulse mode. The pulse mode facilitates welding at low currents. During the welding cycle, the welding current changes from maximum (pulse current) to minimum (pause current) with a certain frequency. The process is stable, heat input is reduced - metal warping is minimized, the part does not overheat.

This mode is necessary to control the heat input into the weld or welding without a filler rod. At the same time, welding can be carried out using both direct and alternating current.

The operating time of the welding machine (work cycle) directly depends on such characteristics as the duration of switching on. The higher its indicator, the longer the tig installation is used without interruption. For example, consider the operating cycle of the FUBAG INTIG 200 DC device. It will work for 6 minutes at a maximum welding current of 200A and will need 4 minutes for a technological break. In practice, it is extremely rare for anyone to cook without stopping for longer than 3-4 minutes, because... Periodically you need to stop to prepare the area for welding, adjust parts, change the welding rod, etc. By correctly assessing the expected load, you can save a lot. An underestimated value of this parameter will lead to an increase in the time required to complete welding operations, since welding will have to be interrupted frequently to cool the inverter. Unreasonably high switching times for tasks significantly increase the cost of equipment. All TIG welding machines are equipped with high-frequency ignition and crater filling functions.

• Crater filling. From the point of view of the quality of the welded joint, it is necessary to exclude the formation of a crater in the final part of the weld. For this purpose, the tig device provides a smooth current reduction mode.

• High frequency ignition. Provides a confident start to the welding process - the arc ignites without contact with the metal surface, which eliminates metal burning. In addition, no tungsten inclusions remain on the metal.

And some more useful stuff

1. Gas purging. This function protects the seam from oxidation.

2. Liquid cooling of the torch. Intensive use of the device implies overheating of the burner. To prevent this from happening, the models are equipped with a cooling system, which is also worth considering when choosing a TIG installation.

3. Supply voltage. Devices with high welding currents are usually produced in a three-phase version. Their younger brothers are single-phase.

Now you have everything you need to make the right choice. If you have any additional questions or want to visually consolidate your knowledge, check out our video tutorial on the FUBAG RUSSIA channel:

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Source: https://fubag.ru/tips/vybor-apparata-argonodugovoy-svarki-5-glavnykh-printsipov/

TIG welding machine: characteristics, comparison of the best models and reviews of the manufacturer

Of all the manual welding methods available today, argon gas, or TIG, welding is considered the most versatile. Welding in an inert gas environment allows you to achieve a high-quality weld due to the complete isolation of the weld pool from atmospheric oxygen, which makes it possible to weld metals such as magnesium and titanium alloys and aluminum, although they are considered highly active.

Operating principle of argon welding

The operating principle of TIG welding is to heat the welding site with an electric arc created by a refractory tungsten electrode.

Due to the strong heating of argon burners during operation, they use a water cooling system. The electric arc melts not only the joints of the parts being welded, but also the filler wire fed into the welding zone.

Wire feeding can be done either mechanically or manually.

The welding site is protected from atmospheric oxygen by inert gases, and in most cases argon is used, and therefore this type of welding is called argon arc welding, and the inverters used for its implementation are called TIG welding machines.

Features of argon arc welding

TIG welding combines the advantages of other types of welding: continuity and cleanliness of the seam, characteristic of semi-automatic welding machines, the ability to work with deep penetration at high currents, for which manual arc welding is used using piece consumable electrodes. Since the arc is formed without the participation of metal supplied to the weld pool, it is much easier to control the quality of the seam: a seam made with a TIG welding machine cannot be confused with any other.

Welding in an inert environment is performed on any metal; only the filler material and current characteristics differ.

TIG inverter design

TIG welding machines for argon arc welding consist of a torch and a welding power source.

Ignition of the arc and its maintenance with the specified parameters is ensured by the welding current source. A TIG welding machine can be used for welding a wide range of materials, but at the same time requires various adjustments, and therefore combined models of semiconductor inverters with a combined output are used today:

• TIG DC mode is designed for welding copper alloys and stainless steels;
• TIG AC mode – for welding magnesium and aluminum;
• Pulse mode with intermittent current is used for welding parts of small thickness.

The design of such devices is very close to devices for manual arc welding, which leads to the appearance of combined MIG TIG MMA welding machines, in which the type of welding is changed after replacing the welding torch with a holder.

Types of welding

In industrial and domestic conditions, electric arc welding machines are widely used, which differ in the type of technology used in the work and the type of welding.

MMA welding

The simplest and most common method of welding parts made of cast iron, stainless steel and ordinary steel is manual arc welding using coated electrodes.

The principle of operation of such welding is to ignite an electric arc between the edges of the parts and the electrode, which melts the metal being welded. In this case, the electrode material is used as an additive, which allows the formation of a seam.

Its coating guarantees stable arc burning and forms a slag protective coating, which is easily removed after the surfaces have cooled.

TIG welding

Argon-arc welding, used when working with steel and non-ferrous metals - nickel alloys, aluminum and copper. The advantage of this type of welding is the absence of slag and a high-quality seam, the disadvantage is the slow speed of work. When working with aluminum and its alloys, there are no alternative welding methods. TIG welding machines use tungsten non-consumable electrodes with automatic or manual supply of filler material in the form of wire.

MIG welding

The wire is used as a filler and electrode at the same time in semi-automatic MIG welding. With this type of welding, you can adjust various parameters in a wide range: wire feed speed, type of gas mixture, operating current and others. MIG welding is mainly used in body work, creating perfect seams.

SAW welding

Compared to open arc machines, SAW welding, or submerged arc welding, has greater productivity. The process is fully automated, produces a high-quality seam and economically consumes filler wire. The arc burns under a thick layer of powder - flux - thanks to which the welder can work without special protection

Cutting CUT

Air-flame cutting is one of the types of welding used when working with products of small thickness. Inverters for such cutting are compact in size, making this method considered one of the most common in industry and everyday life.

Types of welding inverters

The availability of TIG welding machines is due to dumping by Chinese manufacturers and cheaper power electronics, which is why welding equipment stores offer a wide range of inverters.

Aurora PRO INTER

MMA+TIG welding machine produced by the Russian-Chinese company Aurora. Can use both piece electrodes with protective coating and non-consumable electrodes. Welding light alloys requires the use of an external oscillator since the inverter only has DC current. The welding machine can work in rooms with weak electrical wiring thanks to its low power of 4.5 kW.

At the same time, the current adjustment range is from 10 to 200 A, which allows you to work with thin-walled and massive parts. The open circuit voltage is quite high - 60V. The high-frequency ignition circuit of the device makes working with it easier, since sticking of the electrode is almost completely absent.

Due to its low price and good characteristics, the TIG 200 welding machine is an excellent option for learning argon welding.

"Svarog" TIG 160

The TIG AC/DC welding machine “Svarog” is distinguished by its small size and relatively low maximum current of 160 A, but at the same time it has the ability to carry a long load (according to the attached passport - 60% duty cycle) and multifunctionality.

The efficiency of the output stage of the inverter power converter is 85%, which allows reducing power consumption to 2.7 kW. Welding modes with alternating and direct current are easily switched; in the TIG AC mode, polarity balance adjustment is available, and the time of final and preliminary gas supply is adjustable.

For the convenience of the welding station, you can connect a foot pedal. For such functions and characteristics, its price of 44,500 rubles is very reasonable.

PV is the maximum burning time of the electric arc in comparison with the total operating time of the inverter. In the case of this device, a duty cycle value of 60% means that for every six minutes of continuous operation it is necessary to take a break of at least 4 minutes.

"Svarog" TECH TIG

Wide-functional TIG 200 AC/DC welding machine with three operating modes (AC, DC and Pulse), a maximum current of 200A and a large number of settings. The device settings are adjusted by 9 knobs, which professional welders will appreciate. This inverter is very popular in repair shops and auto repair shops.

When preparing a workplace for argon welding, several rules must be taken into account:

1. Despite the fact that the harmfulness of argon welding is several times less than manual arc welding, it is necessary to use protection: you will need a welding mask, leggings, and a robe. Modern “Chameleon” protective masks are very convenient to use, but at the same time they have their drawback - a smaller viewing angle due to the located photocell. The room should have good ventilation, ideally forced exhaust.
2. No flammable substances or materials should be located in the immediate vicinity of the workplace. A carbon dioxide fire extinguisher must be available. It is better not to use powder analogues. Despite their effectiveness, the powder formed during their use is very difficult to remove, and therefore can damage the welding machine.
3. The ventilation openings of the inverter should not be blocked by foreign objects.

Depending on the material and thickness of the parts, the welding current and thickness of the electrodes used are selected. In the case of aluminum alloys, for example, the welding current should be 180-250 A with an electrode diameter of 4-5 mm. This mode will allow you to work with parts with a thickness of 3 mm. Thinner elements are welded in Pulse mode. Compared to working with an argon-helium mixture, the current when working in pure argon is set to 10-20% higher.

To make it easier to control the welding process, the electrode is held at a small angle to the direction of movement, while the additive is supplied strictly perpendicular to the electrode. You can get a strong and beautiful seam if the rod is fed in a fixed position.

Gas pre-supply time is one of the important parameters for setting up a TIG inverter. The maximum time – up to 2 seconds – is set when working with aluminum, titanium and magnesium alloys.

This is done so that the inert gas completely covers the ignition site, otherwise the metal may ignite upon contact with oxygen and form a cavity.

The chemical activity of the metal being welded also affects the delay in turning off the gas: after the arc is turned off, the torch is held above the welding site for a set time to protect the created seam.

Argon welding is one of the most popular welding processes. Affordable prices for TIG MIG welding machines allow you to purchase such devices for personal use. The high demand for argon welding, the performance and efficiency of inverters will quickly pay for all the costs of purchasing such a device.

Source: https://FB.ru/article/319060/tig-svarochnyiy-apparat-harakteristiki-sravnenie-luchshih-modeley-i-otzyivyi-o-proizvoditele