本文在分析改模方案表达的基础上，提出了一种基于粗糙集的改模知识归纳模型。
With the increase of injection mould repair schemes, knowledge induction becomes the key to using knowledge effectively in making injection mould repair schemes.
用级进模结构形式，改现行简单模结构的一工步操作的冲裁为两工步操作：第一工步为半冲裁，第二工步为推料。
Use constructional type of progressive dies, change present one step operation of single die construction for two-step blanking, i. e, first step semi-blanking, second ejecting material.
用级进模结构形式，改现行简单模结构的一工步操作的冲裁为两工步操作：第一工步为半冲裁，第二工步为推料。
Use constructional type of progressive dies , change present one step operation of single die construction for two-step blanking , i.
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