| 摘要 |
PROBLEM TO BE SOLVED: To provide a punching method and a punching device, capable of punching a plurality of steel sheets simultaneously at a sufficient high accuracy and also capable of sufficiently suppressing the occurrence of scrap floating, and a manufacturing method of a laminated core.SOLUTION: A punching method according to the present invention includes the steps of: (a) preparing at least two rolled bodies of electromagnetic steel sheets; (b) supplying a workpiece to a mold, the workpiece having at least two sheets of electromagnetic steel sheets fed out from each of the rolled bodies and superposed on one another and an oil film interposed between two sheets of electromagnetic steel sheets adjacent to each other; and (c) punching the workpiece in the mold.SELECTED DRAWING: Figure 3 |
