为防止电磁铁内衔铁被吸后与端部接触造成磁力短路,使推力降低,常用铜垫相隔。由于铜垫(图1)小而薄,冲模不易设计,加之材料塑性差(为 H62黄铜),故难以一次成型,且裂纹多,装配时还需将共铆入图2所示的堵内,常出现表面不平整、易松动脱落、弯 In order to prevent the armature in the electromagnet is sucked and the end of the contact caused by magnetic short circuit, so thrust, commonly used copper pad separated. The copper pad (Figure 1) is small and thin, the die is not easy to design, combined with poor plasticity (H62 brass), it is difficult to form a single, and more cracks, the assembly also required a total riveting plug shown in Figure 2 , Often appear uneven surface, easy to loose off, bend