Laser-tig arc welding method and clamping tool for double-sided rotating laser-tig arc of cross-shaped joint

Abstract

The invention relates to the technical field of laser welding, in particular to a welding method and a clamping tool for cross-shaped joint bilateral rotating laser-TIG arc. A double-sided rotating laser-TIG arc welding method for a cross-shaped joint, in which two laser emitting heads arranged on both sides of the upper part of the cross-shaped joint and two TIG welding torches arranged on both sides of the lower part of the cross-shaped joint are matched to the cross-shaped joint For welding, the laser emitting head and the TIG welding torch each rotate with a center line parallel to their own axis, and the laser emitting head and the TIG welding torch at the diagonal position remain coaxial; before welding, the positions on both sides of the upper part of the cross joint are preset and The metal powder matched with the laser beam emitted by the laser emitting head lifts the liquid metal in the molten pool through the shielding gas nozzles located on both sides of the lower part of the cross-shaped welding head during the welding process. The invention can solve the problems that the fillet welds on the upper part of the criss-cross joints lie down and undercut, the fillet welds on the lower part protrude to cause stress concentration, and the joint surfaces are not fused.

Description

technical field [0001] The invention relates to the technical field of laser welding, in particular to a welding method and a clamping tool for double-sided rotating laser-TIG arcs of a cross-shaped joint. Background technique [0002] Compared with traditional welding methods, laser welding technology has many advantages such as small welding deformation, deep weld penetration depth and high welding efficiency, so it has been widely used in aerospace, automobile, shipbuilding and other manufacturing fields. [0003] With the development of my country's industry, unconventional joints, such as cross joints, are required in some fields. At present, it is generally used for cross-shaped joints to use laser beams to weld on one side and then weld on the other side. This method not only has low welding efficiency, but also tends to cause unfused joints. Filler metal tends to appear in the upper fillet weld and undercut defects, and the lower fillet weld bulges to cause stress c...

AI Technical Summary

Problems solved by technology

However, this method is prone to defects such as undercut and undercut in the upper fillet weld, and a weld formed by excessive liquid metal protruding from the bottom of the fillet weld, which can easily cause stress concentration and affect the mechanical properties of the product.

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