Applying the key technique of concurrent engineering - design for function ( dff ) , design for assembly ( dfa ) and design for manufacture ( dfm ) of the method of design for " x " , the virtual design of the torque converter is accomplished in catia v5 . then the model constitution and the simulation of virtual process of the torque converter is done in catia v5 , including the model constitution and the simulation of 5 - aixe nc virtual process of the vane , the model constitution ( material : pvc ) of the idler pulley rapid prototyping ( rp ) and the virtual assembly and the motion simulation of the torque converter , etc . 3 - d data exchange between various cad systems is realized by using step standard . the lever of classing the character model of the torque converter is given 应用并行工程的关键技术之一? ?面向产品全生命周期的设计dfx中面向功能的设计dff 、面向装配的设计dfa和面向制造的设计dfm的方法，在catiav5中完成液力变矩器虚拟设计；在catiav5中对液力变矩器进行虚拟加工建模和仿真，包括液力变矩器导轮叶片五轴数控加工刀轨建模与仿真、导轮快速成型rp建模( pvc材料) 、液力变矩器虚拟装配和运动仿真等；采用step标准实现多cad系统之间三维数据交换，提出液力变矩器特征模型的分级标准并对三维模型数据进行分级管理，制定相应的权限等级以规范合作厂家的产品数据管理层次。
