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浙江大学学报(工学版)
JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE)
Mechanical Engineering     
Contour-parallel tool path linking method for sections with lake-including islands
HE Xue jun, WANG Jin, LU Guo dong, CHEN Li
1. State Key Laboratory of Fluid Power and Mechatronic Systems, Zhejiang University, Hangzhou 310027, China;
2. Hangzhou SIASUN Robot and Automation Company Limited, Hangzhou 311200, China
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Abstract  

All offset loops were divided into three types: CCW(counterclockwise) I, CCW II and CW(clockwise) according to the directions of offset loops and whether they were offset from the outer contour, in order to facilitate linking of contourparallel tool path obtained from sections with lake-including islands. From principles like reducing slot cutting and lowering tool load, the offset loops of CCW I and CCW II types were cut from inner to outer while CW type was cut in the opposite way. By the analysis of inclusion relations and distance, the detailed construction and father/child relationship of three type loops were determined. On this basis, many local partial links were obtained upon searching, and the points for linking were calculated to avoid overcutting. Finally, sequential numbers were compared to determine whether partial loops would merge or not, so as to output processing data. For roughing tool path, extra tool path was added for uncut regions. This method avoids usage of tree data structure and pointers, not involving complex depth-first traversal,which is simple, clear and easy to implement. Wood carving experiments confirm its feasibility．

Published: 22 September 2016
CLC:  TH 164  
  TP 391.73  
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Cite this article:

HE Xue jun, WANG Jin, LU Guo dong, CHEN Li. Contour-parallel tool path linking method for sections with lake-including islands. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 2016, 50(9): 1654-1661.

URL:

http://www.zjujournals.com/eng/10.3785/j.issn.1008-973X.2016.09.03     OR     http://www.zjujournals.com/eng/Y2016/V50/I9/1654


岛中含湖型截面的环切刀轨连接方法

为便于连接岛中含湖型截面上的环切刀轨,根据偏置环的旋向以及是否从外轮廓偏置而来,将其划分为CCW(逆时针) I型、CCW II型、CW(顺时针)型3种.从减少开槽切削,降低刀具负荷的原则出发,确定CCW I型与CCW II型从内环往外加工、CW型从外环往内加工的方法.通过包含关系分析与环间距离分析,确定3类环的具体构成以及环与环之间的父子关系.在此基础上,通过支链搜索获得多条局部支链,根据避免过切削的原则确定支链中各偏置环上的相应连接点.最后,通过支链与支链之间的环序号比较,判断是否合并,从而输出加工路径.对于粗加工,增加残区补加工刀轨.该方法避免了树型结构与指针的使用,不涉及复杂的深度优先遍历,算法简单,思路清晰,便于实施.木雕实验证实了该方法的可行性.

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