用加工中心进行多面体加工时零点的设置及计算

Setting and Calculating of Zeropoint for Polyhedron Processing in Machining Center

卧式加工中心是具有X、Y、Z和工作台旋转功能的四轴联动数控机床,具有自动换刀功能,一次装夹可进行4个工作面的多道工序的加工,非常适合进行各种箱体的加工。在进行箱体加工程序的编制时,工件各个侧面可以设置不同的编程原点,但在加工时,这些编程原点必须通过对刀校零来转化为机床可以识别的位置数据。本文给出了一种工件各个侧面编程原点在对刀校零时的计算方法,采用这种方法,可以避免对刀时的重复误差,提高工件的加工精度。

Horizontal machining centre is a four-axis mutual moving computer numerical control machine with X, Y, Z and stage rotary functions ,and also with automatic exchanging tools function, one time loading is able to process four work- ing surface with multi-procedure , it is very suitable to process various boxes ,when programing box machining procedure, each side of workpiece may set different programing zero point . But when machining, these programing zero point must be calibrated zero by tools to convert into machine distinguishable placement date. an algorithm of various side programing zero point of a workpiece when calibrating tool zero point is supplied in this paper , this algorithm can avoid repetitive error when calibrating tools ,so improve machining precision of workpieee.