基于广义装配原理的产品生长型设计

通过研究生物生长与产品设计之间的相似性,提出了基于广义装配原理的生长型设计过程,研究了广义装配原理的三个理论构成。首先,在产品生长阶段,为实现生长过程中的自然选择,提出了以复杂度理论为控制因素的设计推理策略;其次,提出了功能公差设计理论,通过加工成本以及基于多因素的模糊质量损失成本体现广义装配成本,在确保产品功能的同时,以较低的装配与制造成本为公差的分配策略;在产品进化阶段,为保证产品良好的装配性能,采用了虚实结合设计技术。将以装配质量因素为核心的产品复杂度、精度以及制造、装配成本等众多设计因素并行集成于生长型设计过程中,实现了以全生命周期装配质量保障为核心的产品生长型设计。

Poduct Growth Design Based on Generalized Assembly Principle

A generalized assembly principle as well as its theory structure for product growth de- sign was studied through the analysis of the similarity between biological growth process and product growth process.Firstly,in the stage of the product gene decomposition,in order to realize a natural selection,a derivation method in the design procedure was put forward under the constraints built up from the complexity theory analysis.Secondly,to guarantee a good match to the functionality require- ment of the product,a functional tolerance design theory with a tolerance of low assembly cost and manufacturing cost was given,in which manufacturing cost and multi-factor based fuzzy quality loss cost was used to represent the generalized assembly cost,which in turn was regarded as the con- straints of the tolerance allocation design.Then,in the stage of the product gene evolution,to assure the good quality in assembly,a product reconstruction method based on the virtual and reality co-de- sign was put forward to realize the mapping from the functional gene chain model to the concrete prod- uct structure.Finally,with the consideration of many design factors such as product complexity de- gree,product accuracy degree and manufacturing cost as well as assembly cost,a complete product growth design,with the assurance of the generalized assembly quality in the whole lifetime of the product as the kernel,is realized.