Welding produce mode- JCG Industrial Co., Ltd. Manufacturing Factory

There are two welding methods: MIG and TIG
1. MIG and MAG, the welding wire is sent out from the welding gun through the automatic wire feeding mechanism, suitable for automatic arm welding,
Of course, it can also be welded by hand.
2. TIG welding is a hand-held welding torch and the other hand-held welding wire, which is suitable for manual welding of small-scale operations and repairs.
3. The difference between MAG and MIG is mainly in the protective gas. The equipment is similar, but the former is protected by argon, which is suitable for welding non-ferrous metals; the latter is mixed with carbon dioxide active gas in argon, which is suitable for welding high-strength steel and high-alloy steel.
4. MIG and TIG are both inert gas shielded welding, commonly known as argon arc welding. The inert gas can be argon or helium, but argon is cheap, so it is often used in inert gas arc welding and is generally called argon arc welding.
5. Tungsten inert gas shielded welding is a welding process in which tungsten or tungsten alloy is used as the electrode material. Under the protection of inert gas, the metal (workpiece) is melted by the arc heat generated between the electrode and the metal (workpiece) and the welding wire is filled. .
It is called GTAW-Gas Tungsten Arc Welding or TIG-Tungsten Inert Gas Welding in English.

Principle and Application of Welding Method
♦Melting electrode gas shielded welding (CO2/MAG/MIG)
Consumable electrode gas shielded welding, English is Gas metal Arc Welding (abbreviation GMAW)
MAG welding: metal Active Gas Welding (Active Gas: Active Gas)
MIG welding: metal Inert Gas Welding, (Inert Gas: inert gas)
According to the type of shielding gas, it is divided into MAG welding and MIG welding.
MAG welding uses CO2 or mixed CO2 or oxygen in argon (these are called active gases), but the welding habit of using CO2 gas is called CO2 welding.
MIG welding uses inert gases such as argon and helium. The principle is: an arc is generated between the consumable electrode (welding wire) and the base material, the surrounding is sealed with a shielding gas, and the base material and the welding wire are melted. It is widely used in the semi-automatic welding where the operator holds the welding torch, as well as the field of robot welding and automatic welding. Schematic diagram of consumable electrode gas shielded welding:

The characteristics of CO2 welding: fast welding speed, high arc ignition efficiency, deep penetration, one type of welding wire can be applied to a variety of plate thicknesses, good welding quality, and small post-weld deformation.
Features of MAG welding: In addition to the advantages of CO2 welding, the weld has a beautiful appearance, less welding slag, double-sided forming welding, and easy omni-directional welding.
Features of pulsed MIG (GMAW) welding suitable for high-speed welding:
The MIG method is mostly used for welding aluminum, and pulse control is generally used.
Pulsed MIG welding can achieve very small spatter through jet transfer. The appearance of the weld seam is beautiful, and a flat weld seam stacking shape can be obtained.
Compared with non-pulse MAG/MIG welding, since thicker welding wires can be realized, the improvement of wire feeding performance and the reduction of welding wire cost can be realized in thin plate welding. Especially in aluminum and alloy welding, it is superior in automation and robotic arms.
The principle of pulsed MIG (GMAW) welding: the welding current is periodically repeated in the form of pulse current Ip and base current Ib, which can realize droplet transfer in a wide range of welding current fields.

♦Hand welding (STICK)
Electrode hand welding, English is Shielded Arc Welding (abbreviated as SMAW), its principle is: the arc is generated between the coated electrode and the base metal, and the welding method of using the arc heat to melt the electrode and the base metal. The outer layer of the electrode is covered with welding flux, which melts when exposed to heat, which has the functions of stabilizing the arc, forming slag, deoxidizing and refining.
Schematic diagram of electrode manual welding:

The welding power source uses an alternating current welding machine or a direct current welding machine with descending characteristics. Generally use AC welding machine, especially when arc stability is required, use DC welding machine.
main feature:
The welding operation is simple, the welding tongs are light, the movement is convenient, and the application range is wide.

♦Tungsten argon welding (TIG)
Non-melting electrode gas shielded arc welding, TIG welding, English is Tungsten Inert Gas (abbreviation TIG), also known as Gas Tungsten Arc Welding (abbreviation GTAW)
The principle is: TIG welding is a method in which an arc is generated between the tungsten electrode and the base metal in an inert gas environment such as argon, and the base metal and the added welding material are melted and welded.
DC TIG welding
The DC arc welding power source is used as the welding power source, and the electrode is negative and the base material is positive. It is widely used in the welding of stainless steel, titanium, copper and copper alloys.
AC TIG welding
The AC arc welding power source is used as the welding power source, and the positive and negative polarities of the electrode and the base metal are changed mutually. When the electrode is positive (EP polarity), the electrode is overheated and consumes a lot, and the oxide layer on the surface of the base material can be removed, which is the so-called cleaning effect. Using this cleaning effect, it is widely used in welding of aluminum and magnesium. Tungsten argon welding (TIG) schematic diagram:

Features of TIG (GTAW) welding:
It can weld almost all industrial metals and alloys, with good welding quality and high reliability. Good welding shape, no need to remove welding slag, no spatter and less fume, suitable for a wide range of thin to thick plates.


♦RESISTANCE
Resistance welding is widely used in metal welding like electric welding, and it has become an indispensable welding method in industries such as automobiles, home appliances, electronic equipment, railways, construction, and civil engineering. The principle is: a welding method in which the base material is melted and joined by using the resistance heat at the joint of the material to be welded by concentrating a large current and applying pressure. It is the basic principle of resistance welding to use resistance heating to melt metal, pressurize and combine, including resistance spot welding, projection welding, seam welding, seam welding and so on.
Features of Resistance Welding Two-piece overlap spot welding has high efficiency and fast welding speed, suitable for mass production. Beginners can also simply weld. Small welding distortion does not require welding wires, chemicals, and no consumables. Low production cost.

♦Plasma cutting (PLASMA)
The principle of plasma cutting is: arc discharge is performed between the base material (including the nozzle in the torch) and the electrode in the torch, and the discharge heat is used to generate a high-temperature, high-speed plasma arc from the compressed gas to fuse the base material. The small holes of the nozzle make the plasma stream thinner and denser.
Features of air plasma cutting: easy to cut all metals, fast cutting speed, less cutting deformation, cutting can be achieved without a fixed fixture, the cutting shape is not restricted, the heat-affected part is small, contact and non-contact cutting can be performed without skill, operation simple.