在普通镗床上加工孔距精度较高的零件时,定位比较困难,以往我们都是采用块规支垫镗杆和以靠表测量相结合的办法定位。由于镗杆本身有一定的误差,块规支垫镗杆时每次用力的情况也不相同,再加上镗杆静止时和转动时不在同一中心,这就造成了一个累计误差。这个误差值的大小也无法掌握,所以这种定位方法并不精确。为了保证图纸所要求的精度,采用上述方法定位后,还必须试镗小孔,进行测量,调整偏差,往往需要进行多次试镗和调整,才能满足图纸的要求。这种方法,不 In the ordinary boring machine processing hole pitch higher precision parts, positioning more difficult, in the past we are using block gauge pad boring bar and table by the combination of measurement methods. Due to the boring bar itself has some error, the block rules pad boring bar each time the force is not the same situation, together with the boring bar stationary and rotating at the same center, which resulted in a cumulative error. The size of this error can not grasp, so this positioning method is not accurate. In order to ensure the accuracy required by the drawings, after positioning using the above method, you must also test boring holes, measurement, adjust the deviation, often need to test and adjust several times to meet the drawings requirements. This method, no