面向CAPP的零件装夹规划算法研究.pdfVIP

中国机械工程第22卷第22期2011年11月下半月 面向CAPP的零件装夹规划算法研究 黄伟军 胡于进 蔡力钢 1．华中科技大学，武汉，430074 2．北京_7-业大学，北京，100124 摘要：针对计算机辅助工艺过程设计(CAPP)中的零件装夹规划问题，提出了一种基于模糊聚类分 析的装夹规划方法。从定义特征加工元着手，建立了零件的装夹规划数学模型，给出了求解此模型的模 糊聚类分析方法。从工艺决策的角度，分析了影响装夹规划中加工元聚类的加工设备、特征可进刀方 向、工艺原理约束等相关因素，以此计算出了加工元间的模糊相似性。基于加工元同安装相近关系矩 阵，应用编网法对加工元在不同层次上进行聚类，形成了安装实体；基于加工元优先关系图，遵循换刀次 数最少原则对安装内的加工元进行了排序。最后以实例验证了该方法的可行性。 关键词：CAPP；安装规划；加工元优先关系图；模糊聚类 中图分类号：TH162；TP391 文章编号：1004--132X(2011)22—27OO—O7 Study on Part’S Set—up Planning Algorithm in CA PP Huang Weijun Hu Yujin Cai Ligang 1．Huazhong University of Science Technology，Wuhan，430074 2．Beijing University of Technology，Beijing，100124 Abstract：Aiming at the set—up planning problem in computer aided process planning，a novel au— tomatic set—uD planning model for the prismatic part was present on the basis of definition of machi— ning element．and a fuzzy clustering method for solving the model was proposed．From the perspec— tive of process decision—making，these related factors affecting the machining element clustering were analyzed．such as the processing equipment，too1 approach direction，process constraints etc．， then the fuzzy similarity among machining elements was calculated．A net—making method was ap plied to cluster the machining elements of a part in various set—ups based on the set—up similar rela tion matrix；following the principle of minimum number of cutter changes，the machining dements clustered in the same set—up were sorted according to precedence relationship graph．Finally several case studies show that the proposed method iS feasible． Key words：CAPP；set—up planning；machining element precedence graph；fuzzy clustering anal— YSlS 0 引言 其聚类的基础是各安装之问有相同的特征可进刀 计算机辅助工艺过程设计(computer aided 方向(tool approach