大电机行业常用的冷冲模以冲裁模为主,冲件质量的高低直接影响电机的效能与寿命,对于冷冲模零件的加工配合精度与表面粗糙度有较严格的要求,而同时要考虑到现实加工工艺的可能性与经济性,对其选用的一般原则与规定分述如下: 1.表面粗糙度选用的一般原则 Die commonly used in the large electric industry die blanking die-based, punch quality directly affects the level of performance and life of the motor, die for machining parts with precision and surface roughness have more stringent requirements, while taking into account The reality of the possibility of processing technology and economy, the selection of the general principles and provisions are as follows: 1. Surface roughness of the general principles of choice