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Automatic generation of assembly hierarchies for products with complex liaison relations

机译：自动生成具有复杂联络关系的产品的装配层次结构

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摘要

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.
机译：产品设计的装配层次结构决定了子组件模块的形成，模块的装配任务和这些任务之间的串行材料流。通过计算机算法自动生成候选装配层次结构是探索组装系统设计的潜在设计空间的关键步骤，以及对装配序列生成和子组件识别的现有研究具有局限性处理这一挑战。本文建议使用组装层次结构而不是装配序列来生成组装系统设计和优化的设计空间。基于联络图，本文首先通过开发唯一的表示模型来表征组装层次结构，以捕获组装操作之间的分层关系。然后开发出递归算法以搜索候选设计空间，并促进组装系统配置设计的计算机实现。两个案例研究包括真实世界的笔记本电脑组件，证明了所提出的算法在减少设计空间的重复探索中的有效性，并通过与最先进的组装序列生成算法进行比较来避免组装系统配置设计的缺失场景。该方法可以导致自动化工具来评估产品设计的可制造性，并优化组装系统配置设计。

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