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Feature-based assembly modeling and sequence generation
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DOI：10.1016/S0360-8352(98)00106-5.png)
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Abstract
En 中文
A feature-based model is proposed for assembly sequence planning automation. The fundamental assembly modeling strategy for a product is based on the mating features of its components. The objectives of this study are to integrate assembly planning of a product with its CAD model, generate a correct and practical assembly sequence and establish a software system to carry out the planning process. A disassembly approach in assembly planning is used in this study. The degree of freedom information between two mating features is used to characterize their kinematic conditions. Boolean operations of the degrees of freedom on all features of a component provides its local degree of freedom, which is used to set up the functional precedence relation. In some cases, where the functional precedence relation cannot be detected by geometric reasoning, clipping of the known 'common sense' relation is applied by a user. A bounding box checking approach is used to ensure no global collision during assembly, Furthermore, a set of criteria based on assembly feasibility, manipulability, assembly direction, cost and stability is used to choose a good assembly sequence. (C) 1999 Published by Elsevier Science Ltd. All rights reserved.
Keywords:
assembly
sequence generation
assembly modeling
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