日常模具生产中，应注意维护冲切凸、凹模刃口的锋利度。当冲切刃口磨损时，材料所受拉应力将增大，从而冲压件产生翻料、扭曲的趋向加大。

In daily mold production, attention should be paid to sharpness of punching and conc***e die edges. When the cutting edge is worn, the tensile stress of the material will increase, and the stamping and bending will increase.

在冲压件行业里，冲压有时也称板材成形,但略有区别。所谓板材成型是指用板材、薄壁管、薄型材等作为原材料进行塑性加工的成形方法统称为板材成形，此时，厚板方向的变形一般不着重考虑。

In the stamping industry, stamping is sometimes referred to as sheet metal forming, but there is a slight

The so-called sheet forming means the forming method of plastic forming with sheet, thin-walled tube and thin material as raw material, which is called sheet forming. At this time, the deformation of the thick plate is generally not cidered.

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, 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.