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:
- What types of metals will you be working with?
- What is the thickness of the parts being welded?
- Is it useful to weld structures less than 1 mm thick or made of stainless steel?
- How intensively do you plan to use the device?
- 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.
| 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/
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
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.
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://naobzorah.ru/articles/kak_vibrat_apparat_argonodugovoj_svarki
Review of equipment for argon arc welding
Argon arc welding is rightfully considered universal. It is suitable for working with any metals: alloyed, carbon, non-ferrous or refractory.
This ensures excellent quality of seams without the need for mechanical modification, as well as precise maintenance of the penetration depth (this is especially important when working with thin materials), and there is no slag or metal spattering.
This set of characteristics cannot but attract both amateur and professional welders.
Applications of argon arc welding
What is needed for welding work?
Successful welding requires three components:
- Knowledge of the basic technology of joining metals using the argon arc method.
- Experience with gas and/or electric arc welding.
- Compliance of the technical characteristics and capabilities of the welding machine with the tasks being solved.
What parameters are regulated in welding machines?
Tig welding machines are complex equipment and have many different settings. Some of the adjustable parameters should be highlighted separately:
- The magnitude and nature of the starting and main welding current.
- Forcing the arc for easy ignition.
- Time interval for supplying shielding gas at the beginning and end of welding.
- Smooth reduction of welding current at the end of welding to prevent the appearance of craters.
- Frequency and duration of pulses when operating in pulse mode.
- The relationship between direct and reverse polarity when welding with alternating current.
To work successfully, you need to know how to use these settings.
Argon arc machine control panel
Classification of welding machines
Welding machines for argon welding can be classified according to two main characteristics:
- Based on the number of phases, they are divided into single- and three-phase. The first are powered from a mains voltage of 220 V, the second - 380 V. Single-phase models are intended for domestic use. Their maximum welding current is up to 250 A. Three-phase devices are in demand in the professional field. Their maximum welding current can reach 500 A.
- Depending on the supported operating modes, welding machines can be of two types: DC and AC/DC. The former operate in direct current mode. They are optimally suited for joining elements made of ordinary or stainless steel. AC/DC devices can operate in alternating current (AC) or direct current (DC) mode. They are universal, but are of greatest interest for welding aluminum and its alloys. Additionally, it should be noted that AC/DC devices are definitely more expensive than DC ones.
Features of working with products made of aluminum alloys
Aluminum alloys are characterized by high strength, corrosion resistance and low weight. Thanks to these qualities, they are widely used in the automotive, food and chemical industries, as well as in the rocket, ship and aircraft industries. At the same time, welding such alloys is a rather complicated matter.
The thermal conductivity of aluminum is five times higher than that of other metals, so heat from the welding zone quickly spreads throughout the body of the part, and the penetration depth remains very small. At the same time, the melting point of the metal is quite low (only 660 °C) and there is a risk of burning through it. Molten aluminum is covered with a refractory oxide film (its melting point is more than 2000 ° C), which prevents the formation of seams.
One of the most effective ways to level out all of these difficulties is to use alternating current argon arc welding.
Manufacturers of welding equipment
The modern welding equipment market can offer dozens of options for different types of equipment. Moreover, all of them can be divided into three large groups.
Chinese welding machines
Chinese products successfully compete with other manufacturers mainly due to their low prices. You can highlight the brand “Svarog”. It is owned by Shenzhen Jasic Technology Development Company. Equipment under this brand is supplied not only to the Russian, but also to the European market. It is manufactured in compliance with the European standard EN/IEC60974 and directives 73/23/EEC, 89/336/EEC, and also has a Russian certificate of conformity.
Svarog TECH TIG 200 P DSP AC/DC
All Svarog equipment is of the inverter type and includes more than 10 modifications of devices with gradation by phase, maximum welding current and the presence of a pulsed operating mode (it is indicated by the indices “P” or “PD” in the name).
Most devices are intended for household use and connection to a network with a voltage of 220 V. However, some models can be used to solve industrial problems.
It should be noted that Svarog devices are inferior to European or Russian models in durability, and their repairs are expensive.
Another noteworthy brand is Fubag. Its owner is the German company of the same name. Currently, products under this brand are produced at 19 factories located in different countries of the world. Equipment manufactured in China is supplied to the Russian market. It is cheaper than the European one and is distinguished by good quality, reliability and functionality. All devices are of the inverter type and weigh no more than 27 kg.
According to this parameter, they can be classified as mobile. The arc ignition of the devices is carried out in a non-contact manner, and the maximum welding current varies between 160-400 A. Most models support a pulsed welding mode, used when joining thin-sheet parts (the devices have the “PULSE” index in the name). Some Fubag devices are designed for industrial purposes. They are connected to a three-phase network.
Overall, this is a good choice for a reasonable price.
Fubag INTIG 315 T DC Pulse
Another German company, Hans Brilmayer Schweibfachgrobhandlung GmbH, followed a similar path. She owns the BRIMA brand, which is currently produced in China. The range of products is quite large. You can choose household and professional devices with wide functionality, but in terms of quality they cannot compare with their European counterparts.
Equipment under the FoxWeld brand is, in fact, a cheap Chinese copy of the most popular European models of argon arc devices. The owner of the brand established its production at several third-party enterprises in order to maximize the range of products.
There are AC/DC and DC devices powered from a single-phase or three-phase network. All of them are equipped with digital displays, and some models are equipped with a function for recording and recalling used welding programs.
FoxWeld is an economical option, inferior in quality to Svarog and Fubag equipment.
In general, equipment from Chinese manufacturers is more suitable for domestic use or small production or repair shops with low workload.
Russian welding machines
Russian enterprises have proven in practice their ability to produce quite competitive welding equipment. Particularly noteworthy is the equipment under the FORSAGE brand, produced by the State Ryazan Instrument Plant. Its range is limited to five models with a clear gradation (from household to professional devices). The former are connected to a network with a voltage of 220 V and have a maximum welding current of 200 A, the latter are designed for 380 V and 500 A, respectively.
Devices operating only on direct current are designated by the index “BP” in the labeling. This is modern technology, manufactured taking into account the latest advances in inverter technology. Its only drawback is the occasional software flaws that affect the functionality of the devices. This is due to the constant process of refinement or improvement of technology, and in the near future this drawback will be eliminated.
FORSAZH-200 AC/DC
Another Russian manufacturer that deserves attention is Electro Intel. It produces products under the NEON brand. This technique contains algorithms for the operation of the control system and power switches of our own design. NEON devices are intended for industrial use. Their distinctive features: functionality, reliability and long service life.
European welding machines
In this segment, EWM products from the German company EWM HighTec Welding GmbH should be highlighted. It was she who, in 1988, became the developer of the world's first TIG inverter operating in AC/DC modes. Currently, the company can offer customers a wide range of products, most of which are intended for professional use.
EWM HighTec Welding GmbH did not follow the path of Fubag or Hans Brilmayer Schweibfachgrobhandlung GmbH and continues to produce welding inverters in Germany. The company offers a large selection of models for all types of work, a wide range of auxiliary functions to facilitate welding, excellent quality and exceptional reliability.
EWM devices are premium products. It cannot be called budget. Even the simplest models include convenient control, quick selection of any form of alternating current (for AC/DC devices), pulse operation and safe arc ignition. This is an excellent choice for working with any metals.
EWM Tetrix 230 AC/DC
Conclusion
Thus, modern manufacturers of welding inverters for argon arc welding can be divided into three groups: economy (China), standard (Russia) and premium (Germany). Based on this division, you can select equipment for your own or production needs.
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Source: https://vistek-weld.ru/reviews-articles/obzor-oborudovaniya-dlya-argonodugovoy-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:
- 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.
- 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.
- 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 a welding machine for argon welding?
Welding equipment is used to reliably connect metal structures. It comes in different types. To avoid mistakes when choosing equipment, you need to study the features of each of them. In our article we will talk about an argon welding machine. When working with the device, the following are used: inert gas, consumable or non-consumable electrodes.
Argon welding machine
Device and principle of operation
Most often, welders use an inverter-type argon apparatus. The inverter converts alternating current into direct current. During the conversion, a low voltage of great strength is created.
Modern power tools have a mechanism for automatically feeding welding wire, which is melted using an electrode. It is fixed in a burner through which inert gas is supplied. Argon closes the working area from oxygen, which prevents the formation of an oxide film on the surface of the material and the destruction of the seam. For modern installations, two types of burners are used:
- With non-consumable electrode. This is a design that is equipped with a tungsten rod. During operation, alternating or direct current is used. It is important not to touch the working part of the tungsten electrode to the metal surface. It is necessary to maintain the arc at a distance. It melts the base metal and creates a strong connection.
- Burner with consumable electrode. The cheapest option for completing inverters. Provides a narrow zone of heat exposure to the parts being welded, which allows you to make a more accurate seam. However, using a melting electrode, it is impossible to accurately select the depth of weld welding.
When choosing a device, you need to connect the key components to the seller and check their functionality.
Types of equipment
There are different models of argon welding machines in stores. They are classified according to characteristics, functionality, management. By type of control:
- Manual. Inverter welding machines, when working with which the welder must independently move the torch and feed the wire.
- Semi-automatic. On such devices, a mechanism is installed with which the wire is automatically fed to the working surface. The welder remains to operate the torch.
- Automatic. Equipment whose working parts move in a sealed container filled with protective gas. The operator sets a program according to which the torch moves and the wire is fed.
Devices can be divided by functionality:
- Highly specialized devices. Argon-arc devices used for one operation. At the same time, it can work with workpieces of the same size. Designed for mass production.
- Special. Used when working with workpieces of the same type. Perform 1 or more similar operations.
- Universal devices. Sold in construction stores. Used for repair work, creating metal structures, cutting parts.
For garages, workshops, and home work, it is better to choose universal devices.
Areas of use
Argon welding equipment is used in various industries. It effectively connects stainless steel, non-ferrous metals, titanium alloys. Argon arc welding is used in mechanical engineering, shipbuilding, aircraft construction, the manufacture of metal structures, and joining parts of industrial machines. Universal power tools are used during repair work.
Positive and negative sides
Any technological process has strengths and weaknesses. The advantages of argon welding include:
- You can easily create high-quality welds thanks to the extensive number of settings.
- Modern models are economical, productive, and reliable.
- Protection of the weld seam from oxidation.
- You can connect parts both in equipped rooms and outdoors.
Flaws:
- High cost of components.
- An inert gas cylinder is required.
- Due to the large number of components of welding equipment, the process of moving it becomes more complicated.
How to choose a welding machine
When purchasing an argon welding machine, you must consider a number of criteria:
- Burner type. Tungsten non-consumable electrode or consumable element.
- AC or DC current is converted from the connection to the network.
- Device power.
To weld with argon you will need an inert gas cylinder.
If welding equipment is used to create metal structures or parts subject to load, it is better to choose devices from global manufacturers. Saving in this case can lead to catastrophic consequences. An overview of the models can be viewed on the Internet.
What is argon welding and how to choose an argon arc machine?
Argon welding at home
Equipment for argon welding is available to any craftsman. This applies to factories, large enterprises, private workshops, and garages. It is important for a beginner to be able to prepare for welding work. The welding technique is complicated at first glance, but it is enough to practice 2-3 times to learn how to connect parts.
Argon welding at home
Preparation
Initially, you need to prepare equipment for argon welding. Check the connections of the gas supply hoses to the burner and the network connection. Set the device settings. Before starting the equipment, it is necessary to prepare the working surface. To do this, it is cleaned of dirt, rust, and plaque. After cleaning, it must be degreased with a solvent.
Stages of work
Argon welding is a technological process that consists of several stages. These include:
- Connect the ground on the workpiece. If it is not possible to attach it to the workpiece, you can attach the crocodile to a metal work table.
- Set the amperage on the equipment.
- 20 seconds before the arc ignites, open the valve of the argon cylinder.
- Movements with the torch and wire are made strictly along the seam being formed.
- The equipment is switched off before closing the inert gas valve.
When moving the torch, do not move to the side. It is important to remember about the protective mask, equipment, and gloves. You need to stand on a rubber mat. Carry out work in a room with a ventilation system. Fusible electrodes must be free of cracks. They are warmed up before work. The work table must be cleared of unnecessary objects and wiped clean of flammable liquids.
Argon welding is a method of joining metal parts. You can make high-quality seams on various metals and alloys. It is important to take into account the features of this equipment, strictly follow the technology, and do not forget about protective equipment. When purchasing a welding machine, it is better to choose tools from world brands. Consumables (filler wire, electrodes) must be checked for integrity before starting work.
How to choose a welding machine for argon welding? Link to main publication
Source: https://metalloy.ru/obrabotka/svarka/argonnyj-svarochnyj-apparat
Choosing the best argon welding machine
A welding machine is always needed in a private home, to repair a gate, or to weld something in your car. Whatever one may say, almost everyone who lives in a private house, and not only has to deal with welding work. The variety of types of welding machines confuses a beginner.
The question becomes which welding is best for your needs. There is no exact answer to the question of which one to choose. A beginner needs to know general information about all types of welding machines in order to make a decision. Let's talk only about the argon unit.
Scope of use
Argon, an inert gas, is used to perform a type of welding called argon arc welding. During such welding operations, the electrodes may melt or remain unchanged. Non-consumable electrodes are made from tungsten materials. This material can withstand temperatures over three thousand degrees.
The use of argon helps improve the quality and strength of welding. Argon has an atomic weight of almost half that of air, which helps it displace it and most of the gases that occupy space in the weld groove that is created during argon arc welding. It also actively interacts with the metal in the melting zone and affects its future properties.
In this article we will help you understand argon welding machines. We will give advice on how to choose a device for your needs, compare several models and highlight the average price that you should rely on. Having chosen the right welding machine for yourself, you will be completely satisfied, and it is guaranteed to justify its cost.
Summarize
Remember, the chosen argon welding machine will affect the quality of work. By choosing it following the presented rules, you are guaranteed to receive a high-quality product that will serve you for a long and fruitful service. But still, even the most expensive and high-quality device will not provide you with high-quality work, everything depends on you, practice and the argon device you choose will be able to show its positive qualities one hundred percent.
Source: http://GeneratorVolt.ru/invertornyjj/vybor-luchshego-argonnovogo-svarochnogo-apparata.html
Choosing the Ideal TIG Welding Inverter
Argon welding has become quite popular in our time. Its technology is distinguished by the fact that during operation, electric and gas welding techniques are used simultaneously.
What is an argon apparatus for and how does it work?
This type of welding involves the use of an arc that melts the metal, but at the same time the arc is blown with gas - argon. Blowing is necessary to displace oxygen from the working area, which argon successfully does. If the exposure to oxygen is not eliminated, the metal being welded will not melt, but burn, which will not lead to the desired result.
A good welding machine is the key to excellent work
For such work, an inverter for argon arc welding is used. You should find out where exactly it is used. The scope of application of the device includes:
- Connection of alloy steels and non-ferrous metals.
- Joining thin metals, since the inverter allows you to make very neat, high-quality seams.
- The need to weld only on one side of the product.
- Carrying out quite popular work on connecting parts of the pipeline.
- Welding work on metals such as aluminum and stainless steel.
Due to the listed features, an argon-arc welding machine is very useful when performing repair work on aircraft, cars, and yachts. It is also used in medicine.
Device selection
When purchasing a welding inverter, you need to know what exactly is required from the device, so as not to make a mistake when choosing. If when purchasing another type of welding machine one of the important indicators was the weight of the device, then in this case this parameter can be missed.
The argon arc inverter is very compact in size and light in weight. It is enough to hang it on your shoulder using the included strap and work without any complications for a long time.
However, weight is not all that is required from this device.
It is necessary to consider the main indicators, without which it is difficult to decide on the choice of argon arc equipment.
- Range of possible adjustment of welding current. The standard option is 150-200 A.
- Time of continuous operation until the argon arc inverter is switched off for cooling.
- Voltage value at idle. Generally, the higher the voltage, the better.
- Power consumption. If it is too high, you should consider using the device at home. When choosing a machine based on power, you need to take into account the type of work for which argon welding will be used. The thicker the electrodes, the higher the power should be.
- Availability of built-in protection against voltage drop in the electrical network. This will allow the device to work much longer than without protective functions. Typically, protection on domestic devices is triggered when the deviation from the norm is within 10-15%. Foreign models are less sensitive. Their protection is activated only when there is a deviation of 25%.
- Overheat protection. It is simply necessary when the welding inverter operates for a long time. There are two types of protection. In the first case, it works automatically, as a result of which the device turns off, in the second, the device has a corresponding indicator that shows that the welding machine has overheated, which means it needs to be turned off.
- Short circuit protection.
These are the main parameters by which you need to choose a machine for argon-arc welding. They relate to the technical characteristics of the device. You should also clarify how a household inverter for argon welding differs from a professional one.
The household one is much cheaper, since every 20-30 minutes of continuous operation it requires a break of about 30-60 minutes. The professional one is designed to work for 8 hours.
However, for use at home, a household device is quite enough, so why overpay for a professional one?
Before purchasing, it will not be superfluous to look at the product package to check the presence of all the equipment necessary for operation.
Working with argon means being a jeweler in welding
Main differences in the operation of the device
In order to understand the difference between welding, during which an argon-arc inverter is used, you need to know what kind of device it is. The welding inverter itself is a power transformer, which is necessary to reduce the voltage in the network to the required no-load voltage of the source, and the block of power electrical circuits used significantly reduces the ripple of the rectified current.
From this we can conclude that during welding the argon-arc inverter performs the following sequence of actions:
- voltage from the AC mains goes to the rectifier;
- direct current is converted into alternating current at high frequency using a power module;
- the resulting alternating current is supplied to the high-frequency welding transformer (its mass is significantly less than that of the network one);
- the voltage from the transformer, after rectifying the current, goes to the welding arc.
All this significantly distinguishes the arc welding inverter from other similar devices, because when working with it a number of advantages are noticeable, namely:
- The arc is more stable at direct current.
- Small size power transformer.
- Increasing the dynamic characteristics of the arc.
- Increased efficiency.
- Reduces spattering of molten metal during welding.
- Possibility of smooth adjustment of the operating parameters of the device.
- Small size and weight of the device.
How to check the quality of a seam?
Despite the fact that an argon arc inverter is capable of performing welding work much more accurately and efficiently than any other device, the quality of the resulting seam can vary significantly. After all, it also depends on the specialist who performed this work. Therefore, you need to know what defects in welding seams exist and how they can be identified (if these defects are not visible to the naked eye). Main signs of low quality work:
- Lack of connection between the welded surfaces in some places (in other words, gaps in the seam);
- Presence of slag inclusions after arc welding;
- Presence of undercuts;
- Presence of visible cracks;
- The appearance of irregularities on both parts of the metal;
- Incompleteness;
- Presence of large pores.
All these signs can be detected “by eye”, but if nothing of the kind could be seen, this does not mean that the seam is of sufficient quality.
An argon arc welding seam, like any other, may outwardly seem quite strong and of high quality, but inside have certain flaws.
If such flaws are not detected, the entire structure will soon simply collapse at the slightest physical impact on it. That is why additional research is carried out after arc or other welding.
These include:
- Ultrasound testing. To do this, use a special device that emits ultrasonic waves. Such waves, upon encountering a pore or crack, are reflected, and the person doing the inspection sees the corresponding image on the screen.
- Color flaw detection. In order to check the weld for small cracks, this method is the most ideal. For diagnostics, a special substance is applied to one side of the seam, which, seeping through the cracks, gets to the other side. There it manifests itself through the application of another substance. If the first liquid managed to penetrate the weld seam after argon arc welding, it means that there are cracks in this seam, and the quality of work leaves much to be desired.
- Mechanical tests for hardness and impact bending.
- Hydraulic testing is a test with water, in which the pressure on the surface should exceed the working pressure by 25-50%.
- Pneumatic check. That is, the container is tested using compressed air.
- Vacuum test.
- Using X-rays and gamma rays to test the density of a substance.
There are other methods for controlling arc welding, but most of them are used in very rare cases.
Most often, the test is carried out using the first and second methods after a visual inspection of the product.
conclusions
All experienced welders recommend using an argon arc welding inverter instead of other types of devices for such work.
Such recommendations are quite justified, because the device is very light, small in size and can be easily operated even by a beginner, so it does not require special education. I am also pleased with the seam that is obtained after arc welding with this device.
It is very neat and, at the same time, quite reliable, as a result of which you can work with any thin metals.
However, some experts do not recommend that beginners use an argon-arc inverter in order to learn high-quality welding. This device is too easy to use.
After this, a novice welder simply cannot get used to more complex equipment and will not be able to perform the necessary work in the absence of his own inverter.
Unlike a beginner, a more experienced specialist will gladly switch to an arc inverter, but, if necessary, he will just as easily return to the old equipment again, and this will not affect the quality of his work.
Source: http://zavarimne.ru/oborudovanie/vybor-idealnogo-invertora-argonodugovoj-svarki/
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
How to choose a machine for argon arc welding
If this is argon arc welding equipment, then it means that an electric arc will be used, which operates in argon. Blowing with this inert gas is necessary to ensure that the weld does not come into contact with oxygen. And this makes the quality of the seam higher. After all, if there is no atmospheric air, then melting occurs, not combustion of the metal.
Welding can be done using both consumable and non-consumable electrodes. Often, a non-consumable electrode is made from tungsten. Argon, when processing metal, does not cause chemical reactions with gases, molten products in the area where the electric arc is exposed.
Advantages of a argon arc welding machine
In fact, argon is a preservative that protects the surface of a metal part from forming an oxide film.
Argon is 38% heavier than air. This gas causes air to be actively displaced from the area where the arc interacts with the metal. As a result, argon forms complete isolation of the weld pool from the interaction of the working surface with air.
Such welding units are used to process thin-walled metals. We are talking about titanium, aluminum, brass, copper, magnesium alloys. They are also suitable for welding black, low alloy, carbon, galvanized, galvanized and structural steel. Working with such devices involves the use of non-consumable tungsten electrodes in a protective argon environment. Occasionally - helium.
The machine for argon arc welding is intended for those who have great skills in this matter and are highly qualified, that is, for professionals.
Argon arc welding equipment has its own technical features. Nowadays, you rarely come across an argon arc machine that works on the principle of welding transformers. They are being replaced by more modern inverter equipment.
An inverter argon arc apparatus is a power transformer. It reduces the voltage from the electrical network to the no-load voltage value, which must be indicated in the product data sheet. It also reduces current ripple using electronic circuits.
The many advantages of such equipment have led to the fact that argon arc welding has become widespread among professional welders. Thanks to the use of direct current, it has a high degree of arc stability. And even better dynamic characteristics of the arc, relatively small dimensions and weight of the product, smooth control of the welding current, high efficiency and little spatter.
What factors should you consider when purchasing?
In addition to its small dimensions and light weight, when purchasing, you need to take into account that the product has many technical parameters that are worthy of your attention.
* This is, for example, idle speed. The higher the voltage in this operating mode, the better.
*This is also an overheat shutdown. It is possible in manual and automatic mode. Therefore, you need to look at a special indicator.
* This is also the welding current adjustment range. For household purposes, say, 150-200 A is suitable.
* Duration of continuous operation. 15-20 minutes is enough.
* And also – protection against power surges in the network. The device may turn off with fluctuations of 10-15%. If it is a more expensive model, then it will be able to withstand deviations of up to 25%.
A professional device differs from a household one, first of all, in that it has a longer period of operation without a technical break. This is up to eight hours. The average household unit should be turned off after a 20-minute welding cycle. For half an hour or an hour. Automatic shutdown is allowed.
Purchasing professional argon arc welding equipment (TIG) will cost more. There is no point in using such devices in everyday life.
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Source: https://mcgrp.ru/article/4847-kak-vyibrat-apparat-dlya-argonodugovoy-svarki
