In order to solve the problem existing in the process of punched hole and punched chink, existing in part coaxial assured,the die is used the sleeve in convex die.

• 该模具结构上采用凸模护套技术,克服了薄板冲孔、冲缝的凸模细长易断及孔的同轴度难以保证的困难,使模具使用寿命大大增强。