中文摘要：

针对由直线和圆弧组成的封闭轮廓生成环切加工刀具路径的问题,提出了一种基于边等距偏移的环切加工刀具路径生成方法。该方法分别从封闭轮廓的凸点和干涉凹点出发,结合边干涉检测程序和圆弧边分段处理方法对包含直线和圆弧的轮廓分别进行局部和全局无效区域检测,删除轮廓的无效区域后进行等距偏移,生成无干涉环切加工路径。利用自主开发的CAD/CAM软件实现了该方法,仿真实验结果表明,该方法能够准确、有效地生成无干涉区域的刀具加工路径,同时适用于带有孤岛的封闭轮廓偏移。

英文摘要：

A contour-parallel tool path generation method was proposed based on pair-wise offset to solve the problems of generating contour-parallel tool paths,which were composed of lines and arcs.The convex vertex and interfering concave vertex of closed contour were used as a start point respectively,and the local and global invalid areas of contour including lines and arcs were identified respectively with the method combining pair-wise-interference-detection（PWID）procedures and arc segmentation processing.Non-interference contour-parallel tool path was generated by offsetting the closed contour without invalid area.The proposed method was realized in the self-developed CAD/CAM software.The simulation results show that the tool path without interference area may be generated accurately and effectively with the proposed method,and may be applied to closed contours with islands as well.