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。

五金冲压件加工包括冲裁、弯曲、拉深、成形、精整等工序。冲压件加工的材料主要是热轧或冷轧（以冷轧为主）的金属板带材料，例如碳钢板、合金钢板、弹簧钢板、镀锌板、镀锡板、不锈钢板、铜及铜合金板、铝及铝合金板等。

stamping process includes blanking, bending, drawing, forming, finishing and other processes. The main materials for stamping parts are hot rolling or cold rolling (cold rolling), such as carbon steel, alloy steel plate, spring steel plate, galvanized plate, tin plate, stainless steel plate, copper and copper alloy plate, aluminum and aluminum alloy plate.

薄板：锯削时尽可能从宽面锯下去，若必须从窄面锯下时，可用两块木垫夹持，连木块一起锯下，也可把薄板直接夹在虎钳上，用手锯作横向斜推锯，使锯齿与薄板料接触的齿数增加，避免锯齿崩裂。

Thin plate: sawing as far as as wide as when sawing. If must be sawed from narrow surface, it can be held by two wooden blocks and sawed together with wooden blocks. The sheet can be clipped directly to the vise, and a hand saw is used as a transverse oblique saw to increase the number of teeth contacted with the sheet material and ***oid the crack of the saw teeth.