自由曲线轮廓数控刀具路径生成及加工

摘要

Describes the method of plane free curve with arc and straight line fitting to generate tool paths, the method according to the curvature variation on the curve contour segment, select the fitting Arc and line, control total least square error, Calculated parameters of the spatial location of the arc and line segments, With mapping software to draw the fitting of arc and line segments, Get the endpoint coordinates of the arc and line by measuring, Then using simple interpolation instruction generating machining tool path. To the processing of a forming tool cutter as an example, described in detail the application of this method, Realization of complex rotary surface contour curve parts manual programming processing, Upon examination, the cutter parts in full compliance with the relevant requirements.%介绍了一种平面自由曲线轮廓用圆弧和直线拟合生成数控加工刀具路径的方法,该方法依据曲率变化情况,对需加工的截面轮廓曲线进行分段,分别用圆弧和直线线段去拟合,采用控制总体最小误差的方法,计算得到拟合圆弧和直线线段的空间位置参数,借助绘图软件,画出拟合的圆弧和直线线段,通过测量计算得到圆弧和直线的端点坐标,然后用简单插补指令生成数控加工刀具路径程序.以某成型刀具刀盘的加工为例,详细介绍了此方法的应用,实现了具有复杂回转面轮廓曲线零件的手工编程加工,经检验应用此方法加工的刀盘零件完全符合相关要求.