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，fastener厂家，便于**实现机械化与自动化生产，以高劳动生产率。
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，辽源fastener， 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.
管材的锯削：选用细齿锯条，当管壁锯透后随即将管子沿着推锯方向转动一个适当角度，再继续锯割，依次转动，直至将管子锯断。锯割时管子必须夹正。
Cutting of pipe: select a fine toothed saw blade，fastener生产商， when the tube wall is sawed through a proper angle along the direction of the push saw， then continue sawing and turn， until the pipe is sawed. When sawing is cut， the pipe must be clamped.
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