凸轮轮廓的数控加工

以数控机床加工凸轮轮廓曲线是简单而高效的方法,但现有的数控系统无直接进行凸轮插补的功能,一般是用直线插补或圆弧插补代替。这样首先必须将要加工的轮廓曲线划分成微小的直线段或圆弧段,而后求出其节点坐标。提出了等误差直线逼近曲线的节点划分方法,其特点是计算简单、结果精确,并能保证所有插补段上的逼近误差均等,且能控制其大小。

Numerical Machining of Cam Contour

Numerical machining is a simple and efficient method for manufacturing of cam contour, but existing NC systems do not have the function of direct cam interpolation. General solution is substituting it with straight line or arc interpolation. In this way, first of all the machined contour curve must be divided in many micro-sections of line or arc, and then node coordinates are found. A new method for node dividing based on straight line approaching cam contour is presented. The feature of the method is very simple and accurate, and also the approaching errors can be controlled and are equal in all interpolation sections.