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INTEGRATED APPROACH TO GENERATION OF PRECEDENCE RELATIONS AND PRECEDENCE GRAPHS FOR ASSEMBLY SEQUENCE PLANNING

Chinese Journal of mechanical engineering 2002年第3期15卷 193-198页

作者： niu xinwen ding han xiong youlunschool of mechanical science and engineering, huazhong university of science and technologywuhan 430074, china *** School of mechanical science and engineering Huazhong University of Science and Technology Wuhan 430074 China

An integrated approach to generation of precedence relations and precedencegraphs for assembly sequence planning is presented, which contains more assembly flexibility. Theapproach involves two stages. Based on the assembly model, the components in the assembly can bedivided into partially constrained components and completely con-strained components in the firststage, and then geometric precedence relation for every component is generated *** to the result of the first stage, the second stage determines and constructs allprecedence graphs. The algorithms of these two stages proposed are verified by two assemblyexamples.

关键词： Assembly sequence planning Assembly flexibility Precedence relations Precedence graphs

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An Approach to Assembly Sequence Plannning Based on Hierarchical Strategy and Genetic Algorithm

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Computer Aided Drafting,Design and Manufacturing 2001年第2期11卷 8-14页

作者： niu xinwen ,ding han,xiong Youlun School of mechanical science and engineering, huazhong university of science and Technology, Wuhan 430074, china Manufacturing and Production School of mechanical science and engineering Huazhong University of Science and Technology Wuhan 430074 China

Using group and subassembly cluster methods, the hierarchical structure of a product is ?generated automatically, which largely reduces the complexity of planning. Based on genetic algorithm, the optimal of assembly sequence of each structure level can be obtained by sequence-by-sequence search. As a result, a better assembly sequence of the product can be generated by combining the assembly sequences of all hierarchical structures, which provides more parallelism and flexibility for assembly operations. An industrial example is solved by this new approach.

关键词： assembly sequence planning hierarchical strategy genetic algorithm

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维普期刊数据库

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An New Approach to Represent Assembly Sequences

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Computer Aided Drafting,Design and Manufacturing 2000年第2期10卷 65-73页

作者： niu xinwen Hu Xiaojun ding han xiong Youlun (School of mechanical science and engineering, huazhong university of science and Technology, Wuhan 430074, china) Design

How to identify all feasible assembly sequences and compactly represent them is very important and necessary to computer-aided assembly sequence planning. An approach to get precedence relationships between components directly from assembly modeling is proposed in this paper. A representation method called disassembly sequence graph (DSG) is also presented in this paper. An example has been provided to illustrate the proposed approach.

关键词： precedence relationships disassembly sequence grap

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维普期刊数据库

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