The Difference Between TIG and MIG Welding
The Difference Between TIG and MIG Welding
The difference between TIG and MIG welding
1. TIG Welding
is generally a hand-held Torch
, the other hand-held wire, suitable for small-scale operation and
Repair the manual welding.
2. MIG and MAG, the wire is sent from the Welding Torch
through automatic wire feeding mechanism, suitable for automatic welding,
Of course you can also use hand.
3. The difference between MIG and MAG is mainly in the protection of the atmosphere. Equipment similar to the former, but the former is generally protected with argon, suitable for welding non-ferrous metals; the latter in the argon generally mixed with carbon dioxide active gas,
Suitable for welding high strength steel and high alloy steel.
4. TIG, MIG are inert gas shielded welding, commonly known as argon arc welding. The inert gas may be argon or helium, but the argon is cheap, so it is commonly used, and the inert gas arc welding is generally referred to as argon arc welding.
Tungsten inert gas protection welding is based on tungsten or tungsten alloy as the electrode material, under the protection of inert gas, the use of electrode and the parent metal (workpiece) between the arc heat generated by the parent metal and filler welding process.
English called GTAW - Gas Tungsten Arc Welding or TIG - Tungsten Inert Gas Welding
1) Hand Arc Welding (STICK)
Shielded Arc Welding (abbreviation SMAW), the principle is: in the leather electrode and the base material between the arc, the use of arc heat welding electrode and base metal welding method. The outer layer of the electrode is covered with the flux, and the heat is melted, and the arc is stabilized to form slag, deoxidation and refining.
The welding power supply uses an alternating current welder or a DC arc welder with a descending characteristic. General use of AC arc welding machine, in particular, requires the use of arc arc stability of arc welding machine.
Welding operation simple welding clamp light, easy to move, suitable for a wide range of operations
2) melting very gas welding (CO2 / MAG / MIG)
Consumption of electrode gas protection 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 protective gas, generally divided into MAG welding and MIG welding. MAG welding using CO2, or mixing argon in the C02 or oxygen (these are called active gases). The use of CO2 gas alone is known as CO2 arc welding, which is distinguished from MIG welding. MIG welding using argon, helium and other inert gases. The principle is: in the small diameter consumption electrode (wire) and the mother material between the arc, with the protection of gas around the seal, melting base metal and welding wire welding method. Widely used in the operator's hand-held welding torch semi-automatic welding and robot welding and automatic welding field.
CO2 welding characteristics: welding speed fast arc high efficiency deep pool
High cost of welding a variety of welding wire can be applied to a variety of thickness welding quality welding after welding a small welding wire can be applied to a variety of base metal
MAG welding features:
In addition to the advantages of CO2 welding outside the appearance of the appearance of beautiful splash less double-sided forming welding, all-round welding is easy for high-speed welding pulse MIG (GMAW) welding features:
MIG method for aluminum welding, the general use of pulse control.
Pulsed MIG welding can achieve minimal spatter by jet transition. Weld appearance beautiful, can be flattened weld pile high shape. Compared with pulsed MAG / MIG welding, the welding of the wire can also be achieved due to the thicker wire, so that the improvement of the wire feed performance and the reduction of the welding wire cost can be achieved in the sheet welding. Especially in the aluminum and alloy welding in the automation, robotization to play the superiority.
Pulse MIG (GMAW) welding principle: the welding current to pulse current Ip and the base value of the current Ib in the form of periodic, in a wide range of welding current field can achieve droplet transfer
3) TIG welding (TIG)
Non-melting electrode type gas protection 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 argon and other inert gas environment, so that the tungsten electrode and the parent material between the arc, so that the base metal and the addition of welding materials melting, welding methods.
DC TIG welding
DC welding power supply as a welding power to the electrode is negative, the base metal is a positive welding method, widely used in stainless steel, titanium, copper and copper alloy welding. Exchange TIG welding
To AC arc welding power supply for the welding power, electrodes, base metal positive and negative polarity change. Electrode is positive (EP polarity), the electrode overheating consumption, can remove the surface of the base metal oxide layer, the so-called cleaning effect. The use of the cleaning effect, in the aluminum, magnesium and other welding widely used.
TIG (GTAW) welding features:
Can be welded to almost all industrial metal and alloy welding quality is good, high reliability welding is good, do not have to clear the slag no splash smoke
Wide range for thin plate to thick plate
4) Resistance welding (RESISTANCE)
Resistance welding with the same arc welding in the metal welding is widely used as automotive, home appliances, electronic equipment, railways, construction, civil engineering and other industries indispensable welding methods. The principle is a method of soldering and bonding a base material by concentrating a high current and applying pressure, and using a heat of resistance at the junction of the material to be welded. The use of resistance to heat the metal melting, pressure, combined with the basic principles of resistance welding, including resistance spot welding, convex welding, seam welding, roll welding and so on.
Resistance welding characteristics of two lap welding spot welding high speed welding, suitable for mass production beginners can also be simple welding welding deformation small
Do not need wire, pharmaceutical, no consumables production costs low prestige 0 points
5) Plasma cutting (PLASMA)
The principle of Plasma cutting
is: in the base metal (including the torch of the nozzle) and the torch between the electrodes of the arc discharge, the use of thermal energy to produce high-temperature compressed gas, high-speed plasma arc, welding base metal cutting method. The holes in the nozzles make the plasma flow finer and denser.
Air plasma cutting features: easy to cut all metal cutting speed
Cutting deformation is small, can not be fixed fixture to achieve cutting cutting shape unrestricted heat affected small
Contact, non-contact cutting can be no skilled, simple operation.