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.
出处
《上海交通大学学报》
EI
CAS
CSCD
北大核心
2002年第4期482-486,共5页
Journal of Shanghai Jiaotong University
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
high speed cutting
path planning
cutting direction
interference
flexible acceleration & deceleration
