合理的模具设计。在级进模中,下料顺序的安排有可能影响到冲压件成形的精度。针对冲压件细小部位的下料，一般先安排较大面积之冲切下料，再安排较小面积的冲切下料，以减轻冲裁力对冲压件成形的影响。

Reasonable mold design. In progressive die, the order of blanking sequence may affect the accuracy of stamping forming. In order to reduce the impact of punching parts, the punching and cutting blanking of ***all area is arranged in the light of the blanking of the ***all parts of the stamping parts.

⑴设计的冲压件必须满足产品使用和技术性能，并能便于组装及修配。

⑵设计的冲压件必须有利于提高金属材料的利用率，减少材料的品种和规格，尽可能降低材料的消耗。在允许的情况下采用价格低廉的材料，尽可能使零件做到无废料及少废料冲裁。

⑶设计的冲压件必须形状简单，结构合理，以有利于简化模具结构、简化工序数量，即用少、简单的冲压工序完成整个零件的加工，减少再用其他方法加工，并有利于冲压操作，便于***实现机械化与自动化生产，以高劳动生产率。

槽钢的锯削：槽钢的锯削与扁钢一样，但是要分二次从宽边面往下锯，不能在一个面上往下锯，应尽量做到在长的锯缝口上起锯，因此工件必须多次改变夹持的位置。

Channel steel sawing: the channel sawing of the channel steel is the same as that of the flat steel, but it must be sawed down two times from the wide side, and can not be sawed down on one surface, and should be sawed on the long saw mouth as far as so the of the clamping must be changed many times.