基于造型与装配过程的CAD逆向设计方法

Parameterized Modeling and Mechanical Assembling with a Reverse CAD Approach

提出基于造型与装配过程为一体的 CAD逆向设计方法 ,介绍 CAD逆向造型设计和装配过程的基本概念和原理 ,在小型三维机械设计 CAD软件环境下 ,应用 Visual Basic开发了三维实体参数化虚拟造型设计系统和逆向装配系统。通过建立齿轮和轴的逆向装配系统的实例 ,说明了应用该方法开发CAD逆向装配系统的全过程。结果表明该方法适合于形状复杂的三维实体造型和复杂系统的装配设计。

An approach of reverse CAD for virtual modeling and virtual assembling is presented. The basic concept and principle of CAD reversing design are introduced. By using this approach, under the environment of 3-dimensional mechanical design CAD software, a three-dimensional modeling system and a mechanical assembling system are combined and developed by using Visual Basic (VB). From an example of reverse assembling system for gear and shaft, the whole process of developing CAD reverse assemble system is illustrated.The results show that this approach is more suitable to complicated shape 3-dimensional solid modeling and assembling design for a complicated system.