数控车床上修复螺纹时的对刀问题

The Problem of Aiming at Cutting-tool While Renovating Screw Thread on the NC Lathe

针对数控车床修复钻杆螺纹及精加工蜗杆时,怎样使刀尖对准原螺旋线从而修复螺纹的问题,提出利用光电编码器的零位信号,用光电隔离电路控制外部指示灯和发声器,通过发光和声音确定修复螺纹的零位和起始位置,从而实现旧螺纹修复和蜗杆精加工的方法。该方法简单且对数控机床无大的改动,使用方便,效果较好。

There is a problem of how to make knifepoint aim at primary helixes for machining while renovating drill pipe screw thread or completing finish machining of worm.In order to let primary screw thread renovate or finish machining of worm come true,the paper brings forward a method that lets light and electricity isolation circuit to control outer indicator light and acoustic generator,produces light signal and sound signal,then ascertains the starting location of renovated screw thread through utilizing zero position signal of photoelectric encoder.Its structure is simple and need no big change for the NC lathe.The method is proved to be convenient and effective.