基于广义CAD模型的汽车产品拆卸规划  

Disassemble sequence and route planning of automobile product based on generalized CAD modeling

作　　者：易建军[1] 孙英策[1] 季白杨[2] 李成刚[3] 董金祥[4] 

机构地区：[1]华东理工大学机械工程系,上海200237 [2]杭州信雅达系统工程股份有限公司,浙江杭州310053 [3]华中科技大学机械科学与工程学院,湖北武汉430074 [4]浙江大学计算机科学与技术学院,浙江杭州310027

出　　处：《浙江大学学报（工学版）》2008年第2期327-331,共5页Journal of Zhejiang University：Engineering Science

基　　金：国家自然科学基金资助项目(5975042);上海市自然科学基金资助项目(02ZF14024)

摘　　要：提出了从汽车产品的广义CAD装配模型中抽取产品拆卸信息的方法,以支持产品生命周期的全过程.首先给出了关于产品装配体可拆卸性及拆卸过程的假设条件和零件合并定理,建立了适用于商用CAD软件Pro/Engineer环境下的产品拆卸规划算法和产品路径规划算法.然后提出了一种改进的干涉检查方法,通过投影方法将三维干涉检查问题转换为二维干涉检查问题,利用多段直线的组合来近似实际的拆卸路径.以汽车的主减速器及重型越野车的驱动桥为例,在PTC公司的三维实体造型软件Pro/Engineer的开发平台下对产品的CAD模型进行定义与约束,建立了产品的广义装配模型,经过二次开发构建了广义CAD模型的装配/拆卸分析系统,可以对产品的装配/拆卸进行动态仿真分析.A method of abstracting disassembly information from generalized CAD assembly model of auto-mobile product was presented, which can support all the processes in the product life cycle. Some assumed conditions about the disassemblability of product assembly body and the disassembling process, and the parts mergence theorem were proposed. The product disassemble sequence planning algorithm and the product path planning algorithm were designed applicable to the product model built by using the commercial CAD software, Pro/Engineer. Then an improved method for geometrical intervene inspecting （GII） was put forward to transform three-dimensional intervene inspecting into two-dimensional one using the projection principle. Consequently the practical disassembly path could be approximated by the combination of multiple lines. The final drive and drive axle of a heavy-loaded off-road vehicle were taken as exampies, through attaching constraints and definition to their three-dimensional models built using the Pro/ Engineer platform, a generalized CAD model was established. The results show that the dynamical simulation and analysis of product assembly/disassembly can be realized in the analysis system of the generalized CAD model constructed with the secondary development based on Pro/Engineer CAD platform.

关 键 词：汽车产品 广义CAD模型 拆卸规划 

分 类 号：TP291.7[自动化与计算机技术—检测技术与自动化装置]