高速切削的刀位路径规划与控制策略  

High Speed Cutting Path Planning and Control Strategy

作　　者：郭新贵[1] 李从心[1] 

机构地区：[1]上海交通大学塑性成形工程系,上海200030

出　　处：《上海交通大学学报》2002年第4期482-486,共5页Journal of Shanghai Jiaotong University

摘　　要：从 4个方面对高速切削路径规划进行了研究 ,在走刀方向的选择上提出以曲面平坦性为评价准则 ,以确定不同的走刀方向选取方案 .对于曲率变化大的曲面 ,建立曲面的最优进给方向图 ,以确定最优走刀方向 ;曲率变化小的曲面 ,以单条刀轨平均长度最长为原则 ,通过优化算法确定走刀方向 .研究了高速切削刀轨生成过程中加工策略的选择、插补、干涉处理等问题 ,选择适用于高速切削的层切法和行切法 ,提出了相应的插补方法 ,并提出了一种新的适合高速切削的干涉处理思路 .讨论了几种加减速模式 ,选取更适合高速切削特点的柔性加减速模式 .采用 CC插补提高表面质量 ,考虑机床工作性能 ,对进给速度。Four main points of high speed cutting (HSC) path planning were studied. Firstly, in selecting cutting directions, the flatness of surface was used as a judging principle to decide the selection strategies. If the curvature of surface is changeful here and there, the maximum feedrate map must be established to determine the cutting directions. Otherwise, the average length of single cutting path is the maximum for less changeful surface. Secondly, the selection of cutting strategies, interpolation and avoidance of interference were discussed. Parallel zigzag path method and contour path method were proposed in HSC. A new interference avoidance method was introduced. Thirdly, several acceleration & deceleration modes were analyzed. A flexible acceleration & deceleration mode was studied. Finally, cutter contact path (CC path) interpolation was adopted to improve the surface finish. According to the machine tools' capabilities, the feedrate and acceleration of cutter location path (CL path) were verified and optimized.

关 键 词：控制策略 高速切削 路径规划 走刀方向 干涉 柔性加减速 

分 类 号：TG506.1[金属学及工艺—金属切削加工及机床] TP273[自动化与计算机技术—检测技术与自动化装置]