基于Pro／E的发动机活塞参数化设计

采用基于特征的参数化设计方法，利用Pro／E软件的Pro／PROGRAM模块建立了发动机活塞的参数化模型。依据发动机活塞的结构特点，确定影响活塞设计的独立参数和关联参数，不仅实现了零件尺寸的参数化。而且实现了活塞结构的参数化控制特征拼合。最后通过VB开发技术，实现活塞的自动化设计．使设计人员只需输入必要的设计参数就可草拟零件图，并可以变动某些约束参数而不必运行产品设计的全过程来更新设计。参数化设计已成为进行初始设计、产品模型编辑修改的有效手段。

Parametric Design for Engine Piston based on Pro/Engineer

The parametric design method based on feature is adopted in this paper. The parametric model of engine piston is established by the Pro/Program module of Pro/E software. According to the structure of engine piston, independent parameter and relating parameter in piston design is ascertained. The parametric dimension and parametric feature of part is realized. In the end, automatic design of piston is realized by VB development. In order to make part drawing and remodel part, the designer just need to modify the restriction parameter. Parametric design is efficient in production design and model edit.