Tungsten Inert Gas, abbreviated TIG.The literal translation is tungsten inert gas welding, commonly known as non-melting gas welding.Inert gas arc welding using pure tungsten or activated tungsten (thorium tungsten, cerium tungsten, zirconium tungsten, lanthanum tungsten) as non-melting electrode has high quality but low speed.TIG refers to non-melting electrode gas shielded welding, which is an arc welding method using external gas as a protective medium. Its advantages are good visibility of arc and molten pool and convenient operation.No slag or little slag, no post-weld slag cleaning.However, special wind protection measures should be taken when working outdoors.
Welding Skills (1)
TIG welding itself belongs to the open arc operation can observe the shape and flow of the molten pool, is much better than the electrode arc welding.
Welding Skills (2)
Control of welding hand stability is the biggest key to avoid shivering and burning of the dock pole resulting in tungsten inclusion in the molten pool.The control method can only be used to hold the welding gun index finger to support the welded pipe or plate.The length of the tungsten pole can be selected according to the depth of the hole, generally 3-5mm.
The wire transport method can be selected according to the size of the breach, the breach Angle is small, the wire can be placed in the middle of the tank, continuous feeding.When the tear is large, both sides can be used to feed the wire (to be quite skilled, avoid touching the dock pole), and the welding gun moves around to make the edge fuse well.
operating instruction
1, argon arc welding must be operated by special personnel switch.
2. Check the equipment and tools before work.
3, check welding power supply, control system whether there is grounding wire, transmission part add lubricating oil.Rotation should be normal, argon gas, water must be free.If there is water leakage, immediately notify repair.
4. Check whether the welding torch is normal and whether the ground wire is reliable.
5, check the high frequency arc starting system, welding system is normal, wire, cable joints are reliable, for automatic wire argon arc welding, but also check the adjustment mechanism, wire feeding mechanism is intact.
6. Choose polarity according to the material of the workpiece, connect the welding loop, the general material is connected with DC, and the aluminum and aluminum alloy are connected with reverse connection or AC power supply.
7. Check whether the welding groove is qualified. There shall be no oil and rust on the surface of the groove, and oil and rust shall be removed within 200mm on both sides of the weld.
8, for the use of birthgear to check its reliability, welding parts need to preheat also check the preheating equipment, temperature measuring instrument.
9. The argon arc welding control button shall not be far away from the arc, so that it can be closed at any time in case of failure.
10, the use of high frequency arc must often check whether there is leakage.
11, equipment failure should be outage maintenance, the operator shall not repair themselves.
12, in the vicinity of the arc is not allowed to naked and naked other parts, do not smoke, eat near the arc, in order to avoid ozone, smoke inhalation.
