A method for preventing and solving laser welding defects of car roof

A technology of laser welding and top cover, which is applied in the direction of laser welding equipment, welding equipment, instruments, etc., to achieve the effect of reducing manufacturing costs and solving laser welding defects

Inactive Publication Date: 2020-12-04
湖北大冶汉龙汽车有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a systematic and complete method for analyzing the influencing factors affecting laser welding defects and determining the main causes of laser welding defects to prevent and solve laser welding defects on the roof of the vehicle body

Method used

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  • A method for preventing and solving laser welding defects of car roof
  • A method for preventing and solving laser welding defects of car roof

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Embodiment Construction

[0035] In order to make the purpose, technical solution and advantages of the present invention clearer, the implementation manners of the present invention will be further described in detail below.

[0036] From the six aspects of human, machine, material, method, environment and measurement, the influencing factors of laser welding defects are analyzed, and the main reasons leading to the formation of laser welding defects are determined.

[0037] 1. Analysis from the whole process:

[0038] 1) Tolerance requirements for single-piece stamping of side walls and top cover, how to ensure the requirements of range (Range: maximum upper deviation - maximum lower deviation) when controlling tolerance (Tolerance); application in the GD&T stage of the product development stage.

[0039] 2) Requirements for the difference between laser-welded side wall and roof single-piece inspection fixtures and traditional resistance spot welding inspection fixtures;

[0040] 3) How to ensure th...

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Abstract

The invention discloses a method for preventing and solving laser welding defects of a vehicle body top cover. The structure relationship, the process, the equipment parameters, the measuring method and the laser welding defects of the vehicle body top cover are comprehensively analyzed, and the laser welding defects are prevented and solved.

Description

technical field [0001] The invention belongs to the technical field of automobile welding, and in particular relates to a method for preventing and solving laser welding defects of a vehicle body roof. Background technique [0002] The top cover and side wall of the car body are welded by laser, which not only has a beautiful appearance, but the welding strength of the top cover and side wall is better than that of ordinary resistance spot welding, and it also greatly reduces the cost (such as saving the top cover decorative strip). With the maturity of laser welding technology, more and more car body roofs adopt laser welding. Due to the influence of laser welding on plate material, cover precision, welding fixture, robot running track, real-time monitoring, tracking and adjustment of welding seam, Molds, fixtures, inspection tools, and laser welding equipment have extremely strict requirements. Once there is a problem in any link during the stamping and welding process, th...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): B23K26/24B23K26/60G01B5/14G01B21/00
CPCB23K26/24B23K31/125
Inventor张正施剑羽王钧程伟
Owner湖北大冶汉龙汽车有限公司