Torch and impulse TIG a - ku welding process null for TIG a - ku welding

摘要

PURPOSE: To obtain a stable arc and to enable the suitability even in the case of welding a narrow part without developing any welded defect of blow holes, etc., by forming a smaller step part than a base part side at the projecting end part of a non-consumable electrode and also sharpening the tip part of the projecting end part. ;CONSTITUTION: The non-consumable electrode 1 concentrically enclosing an insulating member 2 forms the projecting end part 102 cutting off the tip part in the X₂ direction and separated with a welding wire 3 in the X₁ direction, and in the Z₂ direction side of the projecting end part 102, a cut-off semi-circular part 103 cut off in the X₂ direction is formed. At the boundary between the projecting end part 102 and the cut-off semi-circular part 103, a secondary step part 105 is formed and the tip part 106 of the projecting end part 102 is made to sharp. The cross sectional area of the projecting end part 102 in the Z₁ direction side is formed to smaller than the cross sectional area of the first step part 104 of the non-consumable electrode 1 in the Z₁ direction side, and as the current density at this projecting end part 102 becomes high, the arc generating point is concentrated to projecting end part 102 and does not come upward, and the arc is made to stable.;COPYRIGHT: (C)1993,JPO&Japio