摘要
为解决由成形电极损耗而导致的异形孔尺寸精度和仿形精度下降的问题,提出和实施了一种基于激光测量的成形电极损耗检测及修整方法。首先,利用自主研发的非接触式激光测量系统测量成形电极,获取成形电极加工端三维形貌点云数据,处理点云数据并与标准电极点云数据进行比对,得到成形电极损耗情况。然后,根据电极损耗情况设置修正量及修整电参数,结合反成形修整技术,利用反拷块对成形电极损耗部位进行修整。最后,借助激光测量系统对成形电极修整效果进行检测,并利用修整后的成形电极进行异形孔加工实验。针对等腰梯形成形电极的实验结果表明:该方法能提高异形孔加工一致性,将标准差由0.441 mm降为0.377 mm。
To solve the problem of the decrease in dimensional accuracy and copying accuracy caused by the electrode wear,a method based on the laser measurement and the reverse molding dressing technique was proposed and applied.Firstly,an independently developed non-contact laser measuring system was used to measure the electrode and obtain the 3D shape point cloud data.The point cloud data is processed and compared with the standard electrode point cloud data to obtain the electrode wear.Secondly,according to the degree of electrode wear,the machining parameters are set adaptively.Combined with the reverse molding dressing technology,the reverse copying block was used to dress the electrode wear position.Finally,by using the laser measuring system,the effect of dressing for the electrode was detected,and the dressed electrode was used for machining irregular holes.Experimental results show that this method can accurately trim the electrode with wear,improve the utilization rate of the electrode and the machining accuracy of irregular holes.
作者
闫晓燊
朱思萌
奚学程
赵万生
YAN Xiaoshen;ZHU Simeng;XI Xuecheng;ZHAO Wansheng(State Key Laboratory of Mechanical System and Vibration,School of Mechanical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)
出处
《电加工与模具》
2020年第4期12-16,35,共6页
Electromachining & Mould
基金
国家自然科学基金资助项目(51775341)。
关键词
电火花加工
激光测量
点云处理
电极损耗
修整技术
EDM
laser measurement
point cloud processing
electrode loss
dressing technology
