To date, dozens of welding methods have been developed. The most common types are mig, mag, tig, and mma welding. All of them belong to the thermal class according to the method of obtaining energy for the welding process.
The thermal energy released during the formation of an electric arc allows you to weld any metals. The main heat is generated in the arc itself due to the fact that its resistance is greater than the resistance of the electrode and the part being welded, so melting occurs near the arc. This, in turn, leads to the formation of a weld pool, which, when cooled, provides a permanent connection.
Application of inert gases
MIG welding is the international designation for the welding process of metals in an inert gas environment. Argon, helium or mixtures thereof are used as inert gases.
Gas is supplied from cylinders through high-pressure hoses to the burner. It displaces atmospheric air around the electric arc, thereby eliminating the harmful effects of oxygen on the welding joint.
The seam is of high quality and dense, without pores. The disadvantage of MIG welding is the high cost of inert gas. Argon costs 45 times, and helium 156 times more expensive than carbon dioxide.
MAG welding is the international designation for the welding process in an active gas environment. The most widely used active gases are carbon dioxide and nitrogen. Their function is the same as that of inert gases - protection from atmospheric oxygen.
Carbon dioxide in the welding area decomposes into oxygen and carbon monoxide, which leads to harmful effects such as weld porosity. To avoid this, it is necessary to use electrodes or filler wire containing manganese and silicon .
They bind the released oxygen and deoxidize the welding medium. Gases are stored in high-pressure cylinders; reduction reducers are used for use. When using carbon dioxide, it is recommended to turn the cylinder over and release water vapor, only then start MAG welding.
With tungsten electrode
TIG welding is the international designation for the welding process of metals in an inert gas environment using a tungsten non-consumable electrode.
In Russia and the CIS, TIG welding is called argon arc welding due to the inert gas used. Thanks to the constant length of the electrode, the welding process is greatly simplified; the absence of other impurities allows us to obtain seams of the highest quality.
Pulsed TIG welding is a variation of conventional TIG, but uses pulsed current instead of direct current. In some MAG TIG welding machines, this mode is present along with the main one.
It is useful when working with thin sheets, it does not overheat them, and there is no warping during welding. Typically, several modes are set at a frequency of 1 Hz, 10 Hz, 500 Hz. The result is a beautiful scaly seam.
MMA welding is the international designation for manual electric arc welding. It is produced by electrodes coated with a special protective coating. The MMA welding process occurs due to the formation of an arc between the electrode and the part being welded.
The electrode, melting, enters the weld pool, which was formed due to the melting of the edges of the workpieces. The coating also melts and forms a protective layer on the surface of the bath, after cooling it turns into slag. Easily removed with a hammer.
Semi-automatic welding
The choice of equipment for a welder is huge. The MIG MAG welding machine is very popular. It is used in almost all auto repair shops due to the high quality weld it produces.
Most welding machines now use inverters. The frequency of the welding current in them is practically independent of changes in the mains voltage. At the same time, they have compact dimensions and weight, which allows them to be mobile.
Since the power source for most types of electric arc welding has the same parameters, manufacturers began to create universal models capable of operating in different modes and different types of torches. Semi-automatic MIG MAG and TIG welding has especially developed.
Semiautomatic welding machine Solaris MULTIMIG-221 (MMA/MIG-MAG/SPOT/TIG LIFT)
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A little about installments through Tinkoff Bank
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A little about installments through Post Bank
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Welding wire
Semi-automatic MIG MAG TIG welding involves the use of welding wire, which is threaded into the machine. The quality of the seam also depends on its characteristics. In some cases, you can even do without shielding gas when using cored wire.
There are four types of additives: aluminum, steel, copper and powder. The last two are the most popular. Their use guarantees no splashes and high productivity.
In addition to cored wire, filler wire must be used in a protective gas atmosphere. When purchasing, be sure to check compatibility with the materials and tips being welded.
Universal semi-automatic
A striking example of universalization is a semi-automatic welding machine of the Triton MIG MT 250 brand. This semi-automatic machine belongs to professional equipment and is a small-sized inverter on wheels that produces 250 A in peak mode.
It provides high-quality welding in MIG, MAG, TIG DC, MMA modes and can weld with Spot Stitch technology. For this purpose, the delivery package of the welding machine includes torches for three types of welding.
In peak mode, the on-time is 60%, at currents up to 200 A - 100%. For easy and reliable initiation of the electric arc, the Arc Force and Lift TIG function is provided.
To supply filler wire, a 4-roller drive is used; it is possible to use a 300 mm reel.
A special connector allows the device to work with push-pull and spool gun burners. These are torches that have their own filler wire feeder, with a coil located on it. Filler wire is used of any grade, including flux-cored wire with a diameter of up to 1.2 mm.
How to buy a semi-automatic welding machine MIG / MAG / TIG / MMA
It is profitable to buy a semi-automatic welding machine in Krasnodar, Rostov-on-Don, Stavropol or other cities in southern Russia through our website. The online store “1001 Welding” offers a wide range of such equipment, accessories and consumables at the best prices. You don’t even have to go to our company’s stores. By placing an order remotely and spending a minimum of time, you can receive the goods at the nearest delivery point of the courier company in your locality. Registration is not required to place an order. You fill in the minimum contact information. Then our managers will contact you and agree on all the terms of the transaction.
Operating modes
A welding machine with four modes (MIG, MAG, TIG, MMA) opens up wide possibilities. It allows you to create a seam in different positions, weld ferrous and non-ferrous metals, galvanized, thin and thick sheets.
Spot/Stitch
“Dot/stitch” - this is how you can translate the name of the mode. In it, the MIG MT 250 welds with stitches. The welding drop is transferred when there is no short circuit, which reduces heat input into the product being welded. This eliminates overheating and warping of the metal.
The mode is used when welding galvanized products and stainless steel. Reduced heating of the electrode and the part allows you to increase the performance of the device and its service life.
MIG/MAG
In MIG and MAG modes, the welding machine operates semi-automatically. The filler wire is fed evenly with the simultaneous supply of shielding gas.
The welder only has to move the torch along the future seam at a certain height from the part being welded. This ensures a high welding speed and a high-quality weld, thanks to protection from air oxygen by inert gas. The welding current can be adjusted over a wide range from 30 to 250 A.
TIG
Unlike most semi-automatic MIG MAG devices, the MIG MT 250 model can weld metals in TIG mode using direct current. The device provides for rapid ignition of the electric welding arc when the end of the electrode touches the part to be welded.
There is no high-frequency interference at the moment of arc initiation, which allows it to be used in the radio industry and other areas of manufacturing (or amateur welding) related to electronics.
MMA
Traditional manual electric arc welding provides welding of ferrous metals and their alloys. Direct current allows you to obtain a stable arc.
A special function of the ARC-FORCE welding machine provides adjustment of the arc power, which allows you to obtain the required parameters and a high-quality weld.
Semi-automatic welding machines MIG/MAG/TIG/MMA: advantages and disadvantages
What other advantages are inherent in such devices? The most significant strengths that encourage you to buy a semi-automatic welding machine include:
- Versatility. Using one inverter from this section of the catalog, you can perform several types of welding work;
- Compactness. Modern inverter-type devices are small in size. This allows them to be used effectively for working in areas with a small amount of free space;
- Exceptional reliability. Any inverter semi-automatic welding machine from our range has a manufacturer’s warranty of at least one year. In case of the slightest problem, the buyer should contact our branches - and we will replace the device without any problems;
- Enviable efficiency. The MIG/MAG welding machine features low power consumption;
- Low noise level emitted during operation of the device;
- Highest weld quality. The operating technologies used ensure the absence of metal oxidation in the working area. This has a positive effect on the durability and smoothness of the formed junction of the welded elements;
- Ergonomic operation. Such devices can be used by both beginners in welding and experienced performers;
- Good performance;
- Ability to work with thin-walled structures;
- Affordable price. It is beneficial for any buyer to buy a universal semi-automatic welding machine, the price of which is less than the total cost of several devices.
