Automatic generation of assembly hierarchies for products with complex liaison relations
Automatic generation of assembly hierarchies for products with complex liaison relations
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DOI：
10.1080/0951192x.2019.1690680
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发表时间：
2019-11
影响因子：
4.1
通讯作者：
Zhengqian Jiang;Hui Wang
中科院分区：
文献类型：
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作者：
Zhengqian Jiang;Hui Wang
摘要产品设计的装配层次决定了子装配模块的形成、模块的装配任务以及这些任务之间的串并物流。利用计算机算法自动生成候选装配层次结构是为装配系统设计挖掘潜在设计空间的关键步骤，而现有的装配序列生成和子装配识别研究在应对这一挑战方面存在局限性。本文提出用装配层次代替装配序列来生成装配系统设计和优化的设计空间。基于连接图，通过建立唯一的装配层次表示模型来刻画装配层次，以捕捉装配操作之间的层次关系。利用递归算法搜索候选设计空间，便于装配系统配置设计的计算机实现。通过与现有装配序列生成算法的比较，验证了该算法在减少设计空间重复探索和避免装配系统配置设计中遗漏场景方面的有效性。该方法可以为评价产品设计的可制造性和优化装配系统配置设计提供一种自动化工具。
ABSTRACT The assembly hierarchy for a product design determines the subassembly module formation, assembly tasks for the modules and serial-parallel material flow among these tasks. Automatic generation of the candidate assembly hierarchies by computer algorithms is a critical step to exploring potential design space for the assembly system design, and existing research on assembly sequence generation and subassembly identification has limitations in dealing with this challenge. This paper proposes to use assembly hierarchy instead of assembly sequence to generate the design space for assembly system design and optimisation. Based on liaison graphs, this paper first characterises the assembly hierarchy by developing a unique representation model to capture the hierarchical relationship among the assembly operations. A recursive algorithm is then developed to search the candidate design space and facilitate the computer implementation of assembly system configuration design. Two case studies including a real-world laptop assembly demonstrate the effectiveness of the proposed algorithm in the reduction of repetitive exploration of design space and avoidance of missing scenarios for assembly system configuration design by comparing with state-of-the-art assembly sequence generation algorithms. The method can lead to an automated tool to evaluate the manufacturability of product designs and optimise assembly system configuration design.