电焊机2024，Vol.54Issue(6)：39-44,6.DOI:10.7512/j.issn.1001-2303.2024.06.07
机器人点焊板材厚度检测的数值模拟与变量程序应用研究
Research on Variable Program Application of Plate Thickness Detection in Robot Resistance Spot Welding
摘要
Abstract
This study addresses the issue of welding quality degradation in the spot welding process of car door inner panels,where the gap between workpieces expands and the sheet metal thickness changes after the robot servo welding gun passes through multiple welding points.Based on ANSYS finite element technology,a thermal conduction numerical simulation analysis of the robot spot welding process for high-strength dual-phase steel was conducted to investigate the impact of plate thickness variation on welding heat conduction efficiency and nugget diameter size.The experimental results indicate that when the plate thickness is between 1.9～2.0 mm,the nugget diameter reaches its maximum value,and as the plate thickness increases,the nugget diameter decreases,leading to a decline in welding quality.To resolve this issue,the dynamic detection function of the KUKA robot servo welding gun for plate thickness and the variable program jump command were utilized.When the plate thickness exceeds the tolerance value(1.8～2.5 mm),the robot welding program is interrupted and an alarm is issued in a timely manner,reducing defects such as spatter and false welding caused by the increase in plate gap,and im-proving nucleation quality and welding precision,thus ensuring the stability of the front and back welding points'quality in the spot welding of high-strength dual-phase steel for car door inner panels.关键词
机器人点焊/板材厚度/熔核直径/热传导模拟/变量程序Key words
robot resistance spot welding/plate thickness/nugget diameter/heat conduction simulation/variable program分类
信息技术与安全科学引用本文复制引用
卢健能,柯世金,谈毅,罗邦芬..机器人点焊板材厚度检测的数值模拟与变量程序应用研究[J].电焊机,2024,54(6):39-44,6.基金项目
2022广东省教育科学规划课题(高等教育专项)(2022GLK388) （高等教育专项）
