该文针对冲孔、翻孔两类板材冲压成形工艺方法的主要特点，设计了两类成形件的特征识别规则。
Based on main characteristics of punching and flanging process, this paper describes the design of rules to stamping features.
盘式制动器的零部件比较多，但由于部分零件为异形不规则结构，并且需要定义的尺寸参数过多，不便于进行参数化设计。
The brake system has many parts, but some of them are irregular structure, and need to define too many size parameters, are not easy to make parametric design.
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