环切刀轨无跳刀过渡连接算法

中国机械工程 ›› 2012, Vol. 23 ›› Issue (16): 1896-1902.

环切刀轨无跳刀过渡连接算法

董光雷1;戴宁1;杨峰1;韩厚年1;郭保苏1;王勇2;吕培军2

1.南京航空航天大学,南京,210016
2.北京大学口腔医学院,北京,100081

出版日期:2012-08-25 发布日期:2017-05-27
基金资助:
国家科技支撑计划资助项目(2009BAI81B02)；江苏省卫生厅医学科研项目(H201034)；江苏省“六大人才”高峰项目(2010-WS081)
The National Key Technology R&D Program（No. 2009BAI81B02）

Contour-parallel Offset Tool-path Linking without Tool-retraction

Dong Guanglei1;Dai Ning1;Yang Feng1;Han Hounian1;Guo Baosu1;Wang Yong2;Lü Peijun2

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1.Nanjing University of Aeronautics and Astronautics,Nanjing,210016
2.Peking University School and Hospital of Stomatology,Beijing,100081

Online:2012-08-25 Published:2017-05-27
Supported by:
The National Key Technology R&D Program（No. 2009BAI81B02）

摘要/Abstract

摘要：

在口腔修复体数控粗加工中环切走刀方式应用广泛,为了减少加工时刀具跳刀次数以缩短空走刀时间和优化刀轨环之间的过渡连接,提出了基于单根树结构的环切刀轨无跳刀过渡连接算法。在该算法中,根据刀轨环计算过程中建立的父子关系构建刀轨环树,然后对刀轨环树拓扑分解实现刀轨环编组,编组环集合中具有父子关系的刀轨环之间通过“过渡点对”构建过渡连接关系,最后遍历刀轨环树获得无跳刀刀轨。实验表明,该算法无跳刀,无重复切削,满足实际加工要求。
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关键词: 刀轨拓扑, 无跳刀刀轨, 刀轨环树, 口腔修复体加工

Abstract:

Contour-parallel offset(CPO) tool path was used widely in the rough machining process for dental restoration. In order to minimize the number of tool-retractions which did not contribute to the actual cutting and optimize the links between tool path loops(TPLs), a CPO tool path linking algorithm based on single root TPLs tree data structure was presented. With the parent/child relationship built during the calculation of TPLs, a single root TPLs tree was constructed, and then it was divided into many subtrees according its topology, as a result all TPLs were split into several grouped TPLs. TPLs in each group were linked by linking point pairs. Finally, a CPO tool path without tool-retraction can be generated by traveling TPLs tree. Several testing results show that this method can obtain CPO tool path without tool-retraction effectively.

Key words: tool path topology, tool path without retraction, tool path tree, dental restoration machining

中图分类号:

董光雷1, 戴宁1, 杨峰1, 韩厚年1, 郭保苏1, 王勇2, 吕培军2. 环切刀轨无跳刀过渡连接算法[J]. 中国机械工程, 2012, 23(16): 1896-1902.

DONG Guang-Lei-1, DAI Ning-1, YANG Feng-1, HAN Hou-Nian-1, GUO Bao-Su-1, WANG Yong-2, LV Pei-Jun-2. Contour-parallel Offset Tool-path Linking without Tool-retraction[J]. China Mechanical Engineering, 2012, 23(16): 1896-1902.

参考文献

[1]Takashi M, Yasuhiro H, Jun K, et al. A Review of Dental CAD/CAM: Current Status and Future Per- spectives from 20 Years of Experience[J]. Dental Materials Journal, 2009,28 (1) : 44-56.
[2]Choi B K, Park S C. A Pair--wise Offset Algorithm for 2D Point-- sequence Curve[J]. Computer-- aided Design, 1999,31(12) :735-745.
[3]Wong T N ,Wong K W. NC Tool Path Generation for Arbitrary Pockets with Islands[J]-1. International Journal of Advanced Manufacturing Technology, 1996, 12(3): 174-179.
[4]Jeong J, Kim K. Generation of Tool Paths for Ma- chining Free--form Pockets with Islands Using Dis- tance Maps[J]l. International Journal of Advanced Manufacturing Technology, 1999, 15(5): 311-316.
[5]Kim D S. Polygon Offsetting Using a Voronoi Dia- gram and Two Stacks [J]. Computer--aided De- sign, 1998, 30(14).. 1069-1078.
[6]Lee C S, Phan T T, Kim D S. 2D Curve Offset A1-gorithm for Pockets with Islands Using a Vertex Offset[J]. International Journal of Precision Engi- neer and Manufacturing, 2009,10(2): 127-135.
[7]Held M, Lukacs G, Andor L. Pocket Machining Based on Contour-- parallel Tool Paths Generated by Means of Proximity Maps[J]. Computer--aided Design, 1994,26(3) : 189-203.
[8]Guyder M K. Automating the Optimization of 2 1/2 Axis Milling[J]. Computers in Ind., 1990, 15(3): 163-168.
[9]Park S C, Chung Y C. Offset Tool--path Linking for Pocket Machining[J]. Computer--aided De- sign, 2002, 34(4): 299-308.
[10]Park S C, Chung Y C, Choi B K. Contour Parallel Offset Machining Without Tool-- retractions [J]. Computer--aided Design, 2003, 35(9): 841-849.
[11]Castelino K, DSouza R, Wright P K. Tool Path Optimization for Minimizing Airtime During Ma- chining [J ]. Journal of Manufacturing Systems, 2003, 22(3): 173-180.
[12]Hinduja S, Mansor M S A, Owodunni O O. Voronoi--diagram- based Linking of Contour-- parallel Tool Paths for Two -- and-- a -- half-- di- mensional Closed-- pocket Machining [J]. Proc. IMech, Part B: Journal of Engineering Manufac- ture, 2010, 224(9): 1329-1350.
[13]Kim H C. Tool Path Generation for Contour Par- alle[ Milling with Incomplete Mesh Model[J]. In- ternational Journal of Advanced Manufacturing Technology, 2010, 48(5/8).. 443-454.
[14]Hao Y T, Jiang L L. Optimal Algorithm for no Tool--retractions Contour--parallel Offset Tool-- path Linking[J]. Journal of Mechanical Engineer ing, 2007, 20(2): 21-25.
[15]张鸣[1,2],刘伟军[1],卞宏友[1].基于自由区域的环切轨迹优化连接方法[J].中国机械工程,2011,22(4):468-473.