High-speed welding hump defect suppression method based on non-coupling of laser arc common molten pool

Abstract

The invention relates to the field of welding, and provides a high-speed welding hump defect suppression method based on non-coupling of a laser arc common molten pool, which comprises the following steps: connecting an argon tungsten-arc welding gun behind a laser welding gun in series along the welding direction, then adjusting the distance between the argon tungsten-arc welding gun and the laser welding gun, and adjusting the arc of the argon tungsten-arc welding gun. A certain distance is kept between the electric arc of the argon tungsten-arc welding gun and the laser beam of the laser welding gun, the coupling effect of metal vapor caused by the electric arc and the laser beam can be avoided, and the electric arc only regulates and controls the behavior of a molten pool generated by the laser beam. The arc force and arc heat of the arc can be changed by adjusting the arc, and the maximum distance Z between the highest point of the molten pool and the surface of the to-be-welded workpiece is smaller than or equal to the preset height. Therefore, under the action of arc force, high-speed liquid flow in the molten pool is decelerated, and under the action of arc heat, the width of the molten pool is increased, so that the stability of the liquid flow in the molten pool is enhanced, and the hump defect is inhibited.

Description

technical field [0001] The invention relates to the field of welding technology, in particular to a high-speed welding hump defect suppression method based on laser arc eutectic pool uncoupling. Background technique [0002] Lasers have a higher energy density, so compared to arc welding, laser welding usually has a higher welding speed, which can achieve higher production efficiency. In order to further improve the production efficiency of laser welding, it is necessary to further increase the welding speed. However, when the welding speed of laser welding is too high, periodic fluctuations will appear on the weld, that is, hump defects. The generation of hump defects destroys the mechanical integrity of the weld, reduces the effective bearing area of ​​the weld and causes stress concentration, seriously damages the mechanical properties of the weld, and also makes the weld unsightly, thus limiting the welding speed further improvement. [0003] The formation of hump def...

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Problems solved by technology

[0004] The present invention provides a high-speed welding hump defect suppression method based on laser arc eutectic pool uncoupling, which is used to solve the problem of high laser welding speed in the prior art. The welding seam is prone to hump defects, and the effect of speeding up the welding speed and ensuring the forming quality is achieved

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