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Gap adaptive laser welding method

Inactive Publication Date: 2019-10-18
哈尔滨现代焊接技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that in the welding process of the existing laser welding method, the joint group affects the weld formation due to the change of the gap, especially when the gap is too large, the weld cannot be formed stably, and then provides a gap-adaptive laser welding method

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Experimental program
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Effect test

Embodiment 1

[0021] A gap adaptive laser welding method, the welding system used in the welding method is composed of a laser welding system 2, a wire feeding system 4, a signal acquisition system 1, and a control system 3, and the signal acquisition system is in front, responsible for collecting the size of the weld gap Signal, the laser welding torch is in the middle, responsible for outputting laser for welding, and the wire feeding system is behind, responsible for filling the welding wire;

[0022] The gap adaptive laser welding method comprises the following steps:

[0023] (1) The signal acquisition system monitors the change of the gap size in real time, and the detection accuracy value is not higher than 0.1mm. When the gap size b is less than the threshold value, the wire filling system does not start, and the laser welding proceeds normally, and the welding speed is 0.5-5m / min;

[0024] (2) When it is detected that the gap size is greater than the set threshold, start the wire f...

Embodiment 2

[0027] According to the gap adaptive laser welding method described in Embodiment 1, in the step (1), the gap threshold value is 1 / 5 of the plate thickness and is not greater than 1.5mm.

Embodiment 3

[0029] According to the gap adaptive laser welding method described in Embodiment 1 or 2, in the step (2), the wire feeding speed Vf=(10-15)*b m / min.

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Abstract

The invention relates to a gap adaptive laser welding method. The gap size requirement of a laser welding butt joint is strict, if a gap is large, the conditions of the undercutting of a welding seam,collapse, bad forming of the back surface and the like are easily caused, and the welding quality is influenced. According to the gap adaptive laser welding method, a welding system adopted by the welding method is composed of a laser welding system (2), a wire feed system (4), a signal collecting system (1) and a control system (3), wherein the signal collecting system (1) is arranged in the former and is used for collecting a gap size signal of the welding seam, a laser welding gun is arranged in the middle and is used for outputting laser for welding, and the wire feed system is arranged at the back and is used for filling welding wires. The gap adaptive laser welding method is used for gap adaptive laser welding.

Description

Technical field: [0001] The invention relates to a laser welding method, in particular to a gap adaptive laser welding method. Background technique: [0002] Laser welding has outstanding advantages such as fast welding speed, high joint quality, small welding deformation, and high welding efficiency. Laser welding is more and more widely used in the welding field of medium and thin plate materials. Laser welding has relatively strict requirements on the gap size of the joints. If the gap is too large, it is easy to cause weld undercut, slump, and poor forming of the back side, which will affect the welding quality. When solving the problem of excessive clearance, it is difficult to meet the clearance requirements of the joint group even through the above methods. How to develop a new laser welding method to realize automatic welding under the condition that the joint group has looser requirements on the gap size has become an urgent need. Invention content: [0003] The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/21B23K26/12B23K26/70
CPCB23K26/123B23K26/21B23K26/702
Inventor 徐良王旭友徐富家杨海锋滕彬李荣李洪伟
Owner 哈尔滨现代焊接技术有限公司