アモルファス電磁鋼板の多層積層せん断加工における樹脂皮膜塗布の影響

Interfacial control plays a role in micro-punching an amorphous electrical steel sheet stack. The punching performance was compared between conventional and resin-coated sheets. Through the tensile loading test of resin-coated sheets, it was found that resin coating increased the interfacial friction between adjacent sheets. The punching load decreased in every five-layered stack specimen with an interfacial resin coating. In every punching experiment, punching- affected zones were mainly governed by cracking near the punched hole. Bending deformation was enhanced by interfacial friction to change the original shearing of the stack specimen.