Double-sided laser-TIG (Tungsten Inert Gas) electric arc compound welding method

Abstract

The invention provides a double-sided laser-TIG (Tungsten Inert Gas) electric arc compound welding method, relating to a compound welding method. The method comprises the following steps of firstly, implementing groove processing on a to-be-welded workpiece, and cleaning a tool fixture; secondly, arranging two sets of relatively independent laser TIG electric arc systems on two sides of the to-be-welded workpiece, and adjusting the positions; thirdly, setting welding technology parameters; fourthly, starting the systems to implement welding. According to the new double-sided laser-electric arc compound welding method, the grooves are formed in two side faces when a medium plate is welded, the laser-electric arc compound welding method is simultaneously implemented on two faces of the plate to weld, shown as Figure 4; as a welding gun is integrally designed with a laser working head, the precision of welding is guaranteed; the end part of a tungsten electrode and the extension line of a laser beam are intersected at one point of the welding centre together; the double-sided laser-electric arc welding process is synchronously implemented along the same direction.

Description

technical field [0001] The invention relates to a double-sided laser-TIG arc compound welding method. Background technique [0002] As we all know, laser-arc hybrid welding is a new modern laser welding method, such as figure 1 As shown, using the interaction of two heat sources with different functions to give full play to their respective advantages while making up for the shortcomings of each other has unique advantages: ①High efficiency and energy saving; ②Increased weld penetration and stable welding arc; ③Improved welding Adaptability, high-speed welding can be performed; ④By adjusting the energy matching of the two heat sources, the weld shape can be improved. In the hybrid welding process, the laser heat source mainly includes CO 2 Laser, YAG laser, fiber laser, etc.; arc heat sources mainly include: TIG, GMA, Plasma arc, etc.; the compounding methods include coaxial compounding, paraxial compounding, and even multi-electrode and single laser compounding. [0003]...

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Problems solved by technology

[0005] 1. The two sides of the weldment are affected by two heat sources with different properties. The heating of the base metal on both sides is asymmetrical, and the resulting deformation of the workpiece is also asymmetrical. The mutual offset effect is not obvious, which makes the weld deformation larger and increases the post-weld correction. workload;

[0006] 2. Since the laser and TIG arc are on both sides of the workpiece, the reserved gap when the weldment is clamped reduces the adaptability of the laser, and the difficulty of centering the laser and the arc increases, and laser or arc bias is prone to occur, such as image 3 shown

All of these increase the difficulty of assembling the workpiece and reduce the work efficiency;

[0007] 3. When welding high-reflectivity materials such as aluminum alloy, due to the action of laser beam on one side, the reflection of laser energy is obvious, resulting in serious energy waste and low utilization rate, which increases the welding cost

[0008] These shortcomings have limited the popularity and application of laser-TIG hybrid welding and laser-TIG double-sided welding methods. In view of the above problems, the present invention proposes a new laser-arc hybrid welding method for medium and thick plate welding: double-sided A New Method of Laser-TIG Arc Hybrid Welding

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