Laser double-consumable-electrode single-arc bypass-coupling hybrid welding system and method

Abstract

The invention discloses laser double-consumable-electrode single-arc bypass-coupling hybrid welding system and method. A main wire is used to initiate an arc, a slave wire is not arced, laser is utilized to provide a heat source, and hybrid welding is conducted. The method provided by the invention not only can overcome the defects of respective independent welding of two welding methods, namely laser welding and arc welding, but also can fully exert the respective advantages of two heat sources. The deposition efficiency of welding wires is greatly increased, high-efficiency welding is realized, a very stable welding process is realized, the heat input quantity of parent metal is controlled, the possibility of welding defects is reduced, and good welding quality can be favorably obtained.

Description

technical field [0001] The invention relates to the technical field of welding engineering, and more specifically relates to a laser-double melting pole single arc bypass coupling composite welding system and method. Background technique [0002] Laser welding is an advanced manufacturing technology. Compared with traditional welding methods, laser welding has the advantages of high energy density, low heat input, small deformation, and easy automatic control. It has been more and more widely used in industrial production. However, the general laser welding is mostly self-fluxing welding without filler metal, which has high requirements for welding groove processing accuracy and assembly accuracy, and the composition of the weld seam cannot be adjusted according to the requirements, which makes it subject to certain limitations in actual industrial applications. limits. There are two main schemes to expand the application field of laser welding in industrial production and ...

AI Technical Summary

Problems solved by technology

Although filler wire laser welding has many advantages compared with laser welding, it also has obvious disadvantages: since the heat for melting the welding wire needs to be provided by the laser, the laser power used to melt the workpiece is reduced; , it will also reflect a part of the laser, so that the utilization rate of the laser is further reduced

Laser + arc hybrid welding also has its disadvantages: laser-arc hybrid welding introduces a different form of heat source, laser, on the basis of arc welding, and uses the interaction between laser and arc to realize the welding process

Since the introduction of a new heat source does not increase the amount of deposited metal filling, the amount of molten filler metal per unit power of laser + arc hybrid welding is reduced.

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