凸轮列表点曲线数控编程方法研究

针对平面凸轮轮廓列表点曲线的数控加工,提出了一种采用三次样条等误差双圆弧拟合法实现数控编程的计算方法.首先求出凸轮轮廓列表点的三次样条函数曲线方程,用等误差法计算插值点的坐标.再用双圆弧拟合插值点,得到各分段圆弧的圆心坐标,取圆弧的起点、终点坐标,作为编程所需的刀具中心轨迹的数据,并用相应的数控机床指令写出数控加工程序.该方法既能满足精度要求又能使程序段最少,可以保证数控加工时曲线的光滑性及加工精度,提高加工效率.

Study on NC Programming Approach of the Listing Point Cam Curve

Based on NC processing of the listing point cam curve,a NC programming approach of adopting the bi-arc fitting is presented by the cubic spline interpolation with equal error.Firstly,it is required to acquire cubic spline function equation of the listing point cam curve and to calculate the coordinate points with an equal error.Next,the coordinate points of step-length circular center can be computed using the approach of the bi-arc fitting.Both of the start point coordinate and the end coordinate can be se...