基于机器视觉的电极帽对中误差测量方法研究
Research on Measurement Method for Electrode Cap Alignment Error Based on Machine Vision
赵雪微 1侯跃谦 1刘思远 2任真 2邓成杨 1胡正乙 3白元龙1
作者信息
- 1. 长春大学机械与车辆工程学院,吉林 长春 130022
- 2. 吉林大学机械与航空航天工程学院,吉林 长春 130022
- 3. 长春汽车职业技术大学产教融合发展中心,吉林 长春 130013
- 折叠
摘要
电阻点焊是一种重要的焊接形式,点焊电极帽的对中误差会造成焊点出现扭曲、飞溅或击穿等缺陷.在摄像机坐标系下,获得电极帽表面三维点坐标,并利用这些扫描点通过椭圆拟合及最小二乘直线拟合获得上、下电极帽轴线的空间直线方程,进而测量出一对电极帽的偏移距离和角度.通过试验对电极帽对中误差测量模型进行验证,表明该模型可以在非接触下获得两个电极帽轴线之间的偏移距离和夹角.
Abstract
Resistance spot welding is an important form of welding,and the alignment error of spot welding electrode cap will cause defects such as distortion,splash or breakdown of the solder joint.In the camera coordinate system,the three-dimensional point coordinates on the surface of the electrode cap are obtained.The spatial linear equation of the upper and lower electrode cap axis is obtained by ellipse fitting and least square line fitting by using these scanning points,and then the offset distance and angle of a pair of electrode caps are measured.The measurement model of the alignment error of the electrode cap is verified by experiments,which shows that the model can obtain the offset distance and angle between the axes of the two electrode caps without contact.
关键词
机器视觉/线结构光/电阻点焊/对中误差Key words
machine vision/line structured light/resistance spot welding/alignment error引用本文复制引用
出版年
2024
NETL
NSTL
万方数据