Application research of laser overlay welding EMAT technology for stainless steel car body

TIAN Meng; ZHANG Yong; WANG Liping; SUN Minghui; LV Jianwei

doi:10.7512/j.issn.1001-2303.2020.07.15

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Application research of laser overlay welding EMAT technology for stainless steel car body
Vol. 50, Issue 7, Pages: 96-103(2020)
DOI： 10.7512/j.issn.1001-2303.2020.07.15

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TIAN Meng, ZHANG Yong, WANG Liping, et al. Application research of laser overlay welding EMAT technology for stainless steel car body. [J]. 50(7):96-103(2020)
DOI：

TIAN Meng, ZHANG Yong, WANG Liping, et al. Application research of laser overlay welding EMAT technology for stainless steel car body. [J]. 50(7):96-103(2020) DOI： 10.7512/j.issn.1001-2303.2020.07.15.

摘要

结合不锈钢车体激光叠焊的结构特点,开发了激光叠焊电磁超声自动在线检测技术,采用该技术对不锈钢车体激光叠焊质量进行在线检测。研究表明,电磁超声检测技术适用于不锈钢薄板激光叠焊质量检测,对不锈钢激光叠焊焊缝检测有较高的灵敏度,反射波的高低与不锈钢激光叠焊熔深有良好的对应关系,可根据焊缝的回波能力检测不锈钢薄板激光叠焊熔深。应用研究中,比较了熔深与熔宽的关系,并采用机器人进行全自动检测判断激光叠焊焊缝质量,机器人的扫查速度快,提高了检测效率,对不锈钢激光叠焊质量检测优势明显。

Abstract

Combine the structural characteristics of laser overlay welding of stainless steel body,the automatic on-line EMAT technology for laser overlay welding are developed,adopts EMAT automatic detection technology on-line inspect the quality of laser overlay welding of stainless steel car body. The research shows that the reflection wave height has a good correspondence with the laser overlay welding depth of stainless steel,and the penetration can be detected according to the echo ability of the weld. In the application research,the relationship between penetration and weld width is compared,and the robot is used for automatic detection to judge the weld quality of laser overlay welding. The robot has fast scanning speed and improves the detection efficiency. It has obvious advantages in the quality inspection of stainless steel laser overlay welding.