并行设计中机械产品可制造性评价方法研究

Manufacturability Evaluation of Mechanical Products in Concurrent Design

并行设计要求在产品设计阶段就考虑后继的各项设计和生产活动 ,因此可制造性评价成为并行设计的重要环节。生产的复杂性和多样性决定了可制造性评价的内容十分丰富 ,方法多种多样 ,本文的目的是探讨可制造性评价的模式。运用层次分析法分析机械产品可制造性评价的主要任务及其分解策略 ,并运用优化方法和模糊子集理论求解子任务 ,通过模糊量的量化实现设计方案排序和选优 ,并逐级综合 ,实现对设计方案的综合评价。按此原理开发了一个实时信息反馈 CAD/

Concurrent engineering is a new idea of manufacturing, the core of which is concurrent design. A concurrent design requires that the following activities of manufacturing and assembling should be considered during the stage of a product design. Manufacturability evaluation is a very important field of concurrent design. The aim of this paper is to research into the general model of manufacturability evaluation. The main contents of manufacturability evaluation and task division strategies for mechanical products were analyzed in this paper. Because many requirements and constraints were uncertain in design and evaluation stages, the fuzzy theory was used to solve subtasks and optimize design scheme. By using this method, fuzzy quantities were quantified to aid the design, then, by synthesizing all steps, a general evaluation of the design scheme was acquired. Based on the fuzzy theory, an integrated CAD/CAPP system with real time information feedback was developed.