一、纸垫零件简介 图1所示为冲制的零件图,该纸垫厚0.15毫米,孔径1毫米,孔数140个,并且要求各孔之间不能有拉伤的痕迹,冲出的孔必须光滑无毛刺,纸垫平整不能皱折,对各排孔间的平行度,垂直度等有一定精度要求。 对冲制零件的分析,关键问题是孔径小,孔数多,设计的模具需要保证上下模同轴,选用合适的冲裁间隙。为此决定采用聚氨 First, the paper pad parts Brief introduction Figure 1 shows the parts of the punch, the paper pad thickness of 0.15 mm, a hole diameter of 1 mm, the number of holes 140, and requires no traces of strain between the holes, punched holes Must be smooth without burrs, paper pad formation can not be wrinkled, the parallelism between the rows of holes, such as verticality have a certain accuracy requirements. Hedging parts analysis, the key issue is the small aperture, the number of holes, the mold design needs to ensure that the upper and lower mold coaxial, select the appropriate blanking gap. To this end decided to use polyurethane