Protective measures adopted by manual tungsten argon arc welding
The argon meter to be used shall be inspected regularly, and the damaged argon arc shall be replaced in good time. The outer sleeve, often check the torch nozzle, and the sandwich is intact, there is no damage, clogging, bulging phenomenon, various joints looseness and leakage, tungsten is bent, timely eliminate the trouble.
When welding should choose appropriate welding parameters and assembly clearance, transport of arc, argon arc welding torch and workpiece angle control at 50 DEG ~80 DEG, the wire and the workpiece is 15 DEG ~30 DEG, length of tungsten pole is 3~5mm, the tungsten electrode tip from the pool should be 3~5mm.
Work in the field should take rainproof windproof shed, when the wind is greater than the welding shall be stopped at level 6, some of the long pipe, exhaust pipe should be carried out, wind testing with a lighter flame before welding, in the humid coastal area, northern winter, frost and moisture with parts of oxyacetylene welding welding before baking. When the difficulty of dense pipe rows or more obstacles, welding position is difficult, welding technology should be selected higher welders welding.
According to the process requirements, the oil, rust, water and other substances in the 10~15mm range of the base metal surface are cleaned before welding, and the purity of argon is checked. Qualified welding material is selected.
