论文部分内容阅读
我厂各种发动机上使用的密封油纸垫是采用辽阳造纸厂生产的密封垫纸板冲切加工的,规格有0.1～1毫米厚不等。长期以来冲切这种纸板,由于原材料本身存在表面不平整,翘曲,致密性差等缺陷,冲切一直存在裂纹、扎叠和松凸现象。冲切厚度≤0.3毫米的密封垫纸板时会在零件边缘较窄的地方产生裂纹和扎叠,如图1(a)所示,这种零件废品率达30～50％。而冲切厚度>0.3毫米的密封垫纸板时会在沿冲切边缘产生疏松凸起,如图1(b)所示,这种现象达80～90％。
I plant a variety of engine seal oil pad is used in paper production in Liaoyang paperboard gasket punching processing, the specifications are 0.1 to 1 mm thick. Die has long been punching this board, due to the raw material itself is uneven surface, warping, poor compactness and other defects, there has been punching cutting cracks, tie stack and loose phenomenon. Punching gasket paper with a thickness of ≤0.3 mm cracks and pallets where the edge of the part is narrower, as shown in Figure 1 (a), and the reject rate for such parts is 30 to 50%. While punching thicker cardboard with a thickness of> 0.3 mm, there will be loose bulges at the edge along the blanking. As shown in Fig. 1 (b), this phenomenon reaches 80-90%.