电阻点焊中电极位移三段距离测量方法及试验验证  

Three distance method and its experimental verification for electrode displacement measurement in resistance spot welding

作　　者：王先锋 蒋忠城 段华东 彭章祝 

机构地区：[1]中车株洲电力机车有限公司,株洲412001

出　　处：《焊接学报》2016年第8期63-66,132,共4页Transactions of The China Welding Institution

摘　　要：针对电阻点焊中传统的上电极运动测量方法和长臂工装测量方法中,因焊接过程中焊接热膨胀力引起的焊钳变形带来电极位移测量误差,提出了采用梯形关系和三段距离的电极位移测量方法,并对比分析了这两种测量方法的累计计算误差;然后针对误差较小的三段距离测量方法,通过设计倒F形工装,采用激光位移传感器和基于Lab VIEW编程的嵌入式工控机数据采集系统等组成的电极位移试验监测和验证系统,用工艺试验进行验证.结果表明,三段距离测量方法具有准确性和可行性,由动态电极力引起的C形焊钳下电极的变形位移是不可忽略的电极位移值的组成部分.For the traditional measurement methods including the upper electrode movement and long arm tooling in resistance spot welding,there are errors in measuring electrode displacement,which introduced by the deformation of welding torches caused by the welding thermal expansion force during resistance spot welding process. Therefore,the trapezoidal relationship measurement method and three distance measurement method were suggested, and their accumulative calculation errors were analyzed and compared. Then,the three distance measurement method with less errors was experimentally verified through using the inverted F type tooling and experimental monitoring and verification system for electrode displacement measurement using laser displacement sensors and data acquisition system of embedded industrial control computer with LabV IEW programming.The results showed that it is correct and feasible,and the deformation displacement of lower electrode of the C type welding torches is not the neglectful part of the electrode displacement introduced by the dynamic electrode force.

关 键 词：电阻点焊 电极位移 梯形关系测量方法 三段距离测量方法 试验验证 

分 类 号：TG441[金属学及工艺—焊接]