图1所示偏心轴是胶印机中的一个很重要的零件。由于该轴的载荷比较大,所以φ18h7段的根部不设空刀槽,以免产生过大的应力集中,造成断轴。在加工中,当φ22h7轴面与φ18h7偏心轴面磨削后,必然在φ22h7轴面端部产生一圈毛刺与棱边,由此产生的尖角棱边造成了装配粉末冶金轴套的极大困难。由于φ22h7与φ18h7的偏心距是1.9±0.05mm,所以在a_1点的径向差 The eccentric shaft shown in Figure 1 is a very important part of an offset press. As the shaft load is relatively large, so φ18h7 root of the root section is not empty slots, so as to avoid excessive stress concentration, resulting in broken shaft. In the process, when φ22h7 axis surface and φ18h7 eccentric shaft surface grinding, inevitable in the φ22h7 axial end of a glitch and edge, the resulting sharp edges caused by the assembly of powder metallurgy bushings great difficult. Since the eccentricity of φ22h7 and φ18h7 is 1.9 ± 0.05mm, the radial difference at point a_1