孔系组合夹具定位方法的算法研究
摘要
本文提出孔系基础板组合夹具设计的系统方法。着重研究由平面和圆柱面组成的工件的侧面定位问题，提出一个利用机构学原理自动设计孔系组合夹具的方法，即确定两个或三个侧面定位元件的位置。在该方法中，首先确定其中两个定位元件在基础板上的位置，然后根据两个定位元件和定位边界的位置关系，建立一个假想的连杆机构，利用连杆曲线与工件定位边界求交的方法确定第三个定位元件。本文中，定位元件不再局限于定位销，而且还引入了半V形块进行定位。该方法可与CAD系统集成，为零件的工艺规划和零件装夹定位方案的设计提供全部候选定位方案。在几何造型系统ACIS 6.3和VC++ 6.0平台上开发了组合夹具定位方案自动设计系统。通过几个实例测试，验证了本文提出的算法，也为今后进一步的研究工作创造了条件。
A systematic methodology for automatic planning of modular fixture for dowel-pin system is presented in this paper. By using the mechanism theory the dowel-pin system could be automatically designed so as to determine the position of two or three side locators. A method of how to locate the side of each part which combined by a plate and cylinder surface is emphasized below: firstly, two locators should be positioned in the base plate; secondly, according to the relationship between two locators and the locate edge the linkage mechanism can be created. The location of the third locator can be determined by the intersection of linkage curve and locate edge. The half-Vee is also considered in this paper. The methodology provide all the feasible candidate plans including the processing plans and locating plans of a part which can be integrated with CAD system. A prototype system is developed with ACIS and Visual C++. Some tested samples have proved the algorithms involved in this paper.
A systematic methodology for automatic planning of modular fixture for dowel-pin system is presented in this paper. By using the mechanism theory the dowel-pin system could be automatically designed so as to determine the position of two or three side locators. A method of how to locate the side of each part which combined by a plate and cylinder surface is emphasized below: firstly, two locators should be positioned in the base plate; secondly, according to the relationship between two locators and the locate edge the linkage mechanism can be created. The location of the third locator can be determined by the intersection of linkage curve and locate edge. The half-Vee is also considered in this paper. The methodology provide all the feasible candidate plans including the processing plans and locating plans of a part which can be integrated with CAD system. A prototype system is developed with ACIS and Visual C++. Some tested samples have proved the algorithms involved in this paper.
引文
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[2] 李增志、李文国、张慧敏等主编，组合夹具组装技术手册，中国航空工业总公司第三○一研究所，1997，04
[3] 方和平，柔性夹具的发展与应用，现代制造工程，2002，1，55-57
[4] 吴玉光、高曙明、陈子辰，组合夹具设计的几何原理，机械工程学报，2002(1)
[5] Echave J. Shah J. J. Automatic Set-up and Fixture Planning For 3-axis Milling. Proceedings of ASME design Engineering Technical Conferences. DETC99-DAC8571, 1999.
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[8] Nnaji B,Alladin S,Lyu P. A framework for a rule based expert fixturing system for face milling planar surfaces on a CAD system using a flexible fixtures. J Manufacturing Systems 1988;7(3): 194-207
[9] Brost R. C., Goldberg K. Y. A Complete Algorithm for Designing Planar Fixtures Using Modular Components. IEEE Transactions on Robotics and Automation. 12(1): 31-46, 1996.
[10] Brost R. C., Peters R. R. Automatic Design of 3-D Fixtures and Assembly Pallets. Proceedings of the 1996 IEEE International conference on Robotics and Automation. April 1996.
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[14] 杨冰．轻型钢结构节点板三维设计方法的研究．硕士学位论文．P6
[15] Zhuang Y. Goldberg KY, Wong Y. On the existence of modular fixtures. In Proc IEEE Int Conf on Robotics and Automation,1996.
[16] Chantal Wentink A. Frank Van Der Stappen Mark Overmars.Algorithms for Fixture Design.
[17] 吴玉光．一种孔系组合夹具定位方案自动确定方法[J]．制造技术与机床．2002 (8)：25-28
[18] 吴玉光．面向并行工程的零件可制造性评价方法研究．博士学位论文．P75
[19] 申永胜 主编．机械原理教程．清华大学出版社．2001，12．P58
[20] 钱能 主编．C++程序设计教程．清华大学出版社．1999年4月第1版
[21] 侯俊杰 著．Dissecting MFC(2nd Edition)．华中科技大学出版社．2001-01
[22] Jonathen Corney and Thoedore Lim. 3D MODELING with ACIS. Saxe-coburg publications, 2001
[23] 詹海生 李广鑫 马志欣 编著．基于ACIS的几何造型技术与系统开发．清华大学出版社．2002年6月
[24] 孙立镌 编著．计算机图形学．哈尔滨工业大学出版社．2000年1月
[25] ACIS Technical Overview. Spatial, 2000
[26] 殷人昆，陶永需．数据结构C++描述，清华大学出版社．1999年7月
[27] 陈元琰，张晓竞．计算机图形学实用技术．科学技术出版社．2000年9月
[2] 李增志、李文国、张慧敏等主编，组合夹具组装技术手册，中国航空工业总公司第三○一研究所，1997，04
[3] 方和平，柔性夹具的发展与应用，现代制造工程，2002，1，55-57
[4] 吴玉光、高曙明、陈子辰，组合夹具设计的几何原理，机械工程学报，2002(1)
[5] Echave J. Shah J. J. Automatic Set-up and Fixture Planning For 3-axis Milling. Proceedings of ASME design Engineering Technical Conferences. DETC99-DAC8571, 1999.
[6] WU Y., Rong Y., Ma W., LeClair S. R. Automated Modular Fixture planning: Geometric analysis, Robotics & Computer-Integrated Manufacturing. 14: 1-15, 1998.
[7] WU Y., Rong Y., Ma W., LeClair S. R. Automated Modular Fixture planning: Accuracy, Clamping, and Accessibility Analysis. Robotics & Computer-Integrated Manufacturing. 1998,14:16-26
[8] Nnaji B,Alladin S,Lyu P. A framework for a rule based expert fixturing system for face milling planar surfaces on a CAD system using a flexible fixtures. J Manufacturing Systems 1988;7(3): 194-207
[9] Brost R. C., Goldberg K. Y. A Complete Algorithm for Designing Planar Fixtures Using Modular Components. IEEE Transactions on Robotics and Automation. 12(1): 31-46, 1996.
[10] Brost R. C., Peters R. R. Automatic Design of 3-D Fixtures and Assembly Pallets. Proceedings of the 1996 IEEE International conference on Robotics and Automation. April 1996.
[11] 徐志刚．基于广义映射原理的组合夹具结构设计自动化．工程设计．2000(1)：31-36
[12] 孙言贵．组合夹具组装计算机辅助设计软件MFS CAD R5.0．航空标准化与质量．1999(2)：38-40
[13] 麻建东，刘璇．三维组合夹具元件库的建立．北京轻工业学院学报．第19卷 第2期，2001 (6)．
[14] 杨冰．轻型钢结构节点板三维设计方法的研究．硕士学位论文．P6
[15] Zhuang Y. Goldberg KY, Wong Y. On the existence of modular fixtures. In Proc IEEE Int Conf on Robotics and Automation,1996.
[16] Chantal Wentink A. Frank Van Der Stappen Mark Overmars.Algorithms for Fixture Design.
[17] 吴玉光．一种孔系组合夹具定位方案自动确定方法[J]．制造技术与机床．2002 (8)：25-28
[18] 吴玉光．面向并行工程的零件可制造性评价方法研究．博士学位论文．P75
[19] 申永胜 主编．机械原理教程．清华大学出版社．2001，12．P58
[20] 钱能 主编．C++程序设计教程．清华大学出版社．1999年4月第1版
[21] 侯俊杰 著．Dissecting MFC(2nd Edition)．华中科技大学出版社．2001-01
[22] Jonathen Corney and Thoedore Lim. 3D MODELING with ACIS. Saxe-coburg publications, 2001
[23] 詹海生 李广鑫 马志欣 编著．基于ACIS的几何造型技术与系统开发．清华大学出版社．2002年6月
[24] 孙立镌 编著．计算机图形学．哈尔滨工业大学出版社．2000年1月
[25] ACIS Technical Overview. Spatial, 2000
[26] 殷人昆，陶永需．数据结构C++描述，清华大学出版社．1999年7月
[27] 陈元琰，张晓竞．计算机图形学实用技术．科学技术出版社．2000年9月