How to choose an argon welding machine

Design features of argon arc welding machines

To perform argon arc welding, special welding machines are used, which combine structural elements of electric arc and gas welding devices.

 The essence of this technology, which is actively used for welding parts made of alloy steels, aluminum and other metals, is that the melting of the edges of the joined products and filler wire is ensured by the combustion of the welding arc, and the entire process takes place in a protective gas environment, in which is used as argon. To perform argon arc welding, two types of electrodes can be used - consumable and non-consumable, made from refractory tungsten.

Multifunctional welding station for industrial use

Equipment for welding in a protective atmosphere of argon

The devices used for argon arc welding can be of several types: universal, specialized and special. The most common type of welding equipment due to its high functionality is universal type welding equipment.

Using it, you can equally successfully perform argon welding both in production and at home. Unlike universal devices, special and specialized ones are used to perform welding work only in production conditions.

Adapter designed for tungsten welding and used in conjunction with a rectifier

Argon-arc equipment, classified as universal, consists of the following mandatory elements:

• welding torch (it is better to have a set of such torches with different parameters);
• a device used to regulate or compensate for the direct component of the welding current;
• a source of direct (DC) or alternating (AC) current (devices that have both such sources are often used);
• a device that provides control and protection of the welding cycle;
• a device responsible for the rapid ignition of the welding arc, as well as its stabilization during further combustion.

Argon welding kit: gas reducer, TIG torch and tungsten electrodes

Universal devices are often equipped with additional modules that make it possible to increase the efficiency of welding work and significantly improve the quality and reliability of the formed joints. In particular, the following advanced techniques allow you to achieve such results:

• preheating the welding wire before starting work;
• the use of devices that generate pulsating welding current (the use of pulsating current minimizes deformations in the finished joint and makes it possible to efficiently melt metal when performing work in any spatial position);
• performing argon arc welding using several tungsten electrodes simultaneously (it is advisable to use this technique if welding is performed at high speeds and it is necessary to form high-quality welds without undercutting).

The most popular universal welding machines used to perform work in a protective argon environment are inverters. Using such devices, you can obtain high-quality welded joints both in production conditions and in the home workshop.

The popularity of these argon-arc devices is explained by a number of significant advantages that they have.

• Inverters are mobile devices because they are small in size and relatively light in weight.
• These devices are easy to operate and maintain. In order to start the operation of such a device and turn on the supply of argon to the welding area, just press one button.
• The weld seam formed using an argon-arc apparatus is not only high-quality and reliable, but also very neat. Thanks to this, inverters can be used even in cases where increased demands are placed on the appearance of the weld.
• Compared to other types of welding machines, inverters consume less energy.
• The welding arc can be ignited using both contact and non-contact methods using such devices.
• The use of such argon-arc equipment makes it possible to perform high-quality connections even on thin-walled parts.
• An electrical circuit is built into the inverter design, which is responsible for stabilizing the welding current, which eliminates unplanned attenuation of the electric arc during the work process.
• Work performed using an inverter is highly productive.
• The use of such equipment is highly safe, since the fan included in its design makes it possible to effectively remove harmful volatile compounds from the welding zone.

Selection of argon arc devices

If you are thinking about which machine to choose for welding in a protective argon environment, then you can be guided by the following simple rules.

• Frequent welding work with parts made of aluminum and alloys based on this metal requires the purchase of argon-arc equipment that produces direct or alternating current.
• It is better to weld stainless steel parts (especially of small thickness) using argon-arc machines, the functions of which include a pulse mode.
• The choice of equipment is also influenced by the thickness of the parts that will be connected with it. Thus, for welding workpieces whose thickness does not exceed 7 mm, an argon-arc machine that produces a welding current of up to 200 A is perfect. If the thickness of the products being joined is greater, equipment is needed that provides a welding current of up to 300 A.
• If the equipment will be operated in intensive mode and a large number of continuous cycles of work will be performed on it, then serious attention should be paid to the choice of burner. Its design must allow for the use of water cooling.

Budget burner SR-20 with liquid cooling

You should not purchase devices that have functions that you will never need. Otherwise, you'll have to pay for unnecessary functionality.

What else is required to perform welding in an argon environment?

In addition to the welding machine itself, to perform argon arc welding you will need to purchase:

• a gas cylinder that will contain argon;
• a reducer, which will be used to adjust the pressure of the supplied gas;
• gas valve;
• protective equipment – ​​a welder’s mask and gloves made of dense material;
• welding torch.

After the basic equipment and all additional devices have been purchased, you can begin to perform argon arc welding yourself. First of all, it is necessary to thoroughly clean the surfaces of the products to be joined and degrease them using a solvent or acetone. If aluminum parts are to be cooked, they will need to be additionally cleaned of the refractory oxide film.

In order for the welded joint created using an argon arc apparatus to be of high quality and reliability, a number of simple recommendations should be followed.

• It is best to weld parts made of stainless steel using direct current. In this case, not only does the quality of the formed connection improve, but also the service life of the tungsten electrode increases significantly.
• The connection of parts made of aluminum and alloys containing this metal should be performed using alternating current. The use of such a current makes it possible to more effectively melt the surface layer of a given metal, on which there is always a refractory oxide film.
• It is desirable that the machine used for argon arc welding has a function of automatic stabilization of the welding current, which will ensure stable burning of the electric arc during operation. In addition, it is important that the strength of the current used can be adjusted within a wide range. This is of particular importance in cases where the presence of craters at the ends of welds is unacceptable. To avoid their occurrence, the welding current at the end of the process is reduced to an acceptable minimum, for which a regulator is used.

On the modern market there is a wide variety of domestic and foreign equipment that can be successfully used to perform welding in an argon protective environment. Thus, everyone can choose exactly the argon arc apparatus that best suits their needs and financial capabilities.

Source: http://met-all.org/oborudovanie/svarochnye/argonodugovoy-svarochnyj-apparat.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.

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

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.

 

Source: https://mcgrp.ru/article/4847-kak-vyibrat-apparat-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:

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

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

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.

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:

1. 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.
2. 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:

1. Manual. Inverter welding machines, when working with which the welder must independently move the torch and feed the wire.
2. 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.
3. 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:

1. 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.
2. Special. Used when working with workpieces of the same type. Perform 1 or more similar operations.
3. 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:

1. You can easily create high-quality welds thanks to the extensive number of settings.
2. Modern models are economical, productive, and reliable.
3. Protection of the weld seam from oxidation.
4. You can connect parts both in equipped rooms and outdoors.

Flaws:

1. High cost of components.
2. An inert gas cylinder is required.
3. 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:

1. Burner type. Tungsten non-consumable electrode or consumable element.
2. AC or DC current is converted from the connection to the network.
3. 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:

1. 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.
2. Set the amperage on the equipment.
3. 20 seconds before the arc ignites, open the valve of the argon cylinder.
4. Movements with the torch and wire are made strictly along the seam being formed.
5. 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

Argon welding machine: review of models, advantages | mk-soyuz.rf

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.

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 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

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 arc formation 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-200 pnac/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