Method of manufacturing laminated core
AssigneeNippon Steel Corporation
InventorsIchiro Tanaka, Kazutoshi Takeda, Minako Fukuchi, Shinsuke Takatani, Shuichi Yamazaki
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Abstract
Provided is a method of manufacturing a laminated core by punching electrical steel strips including an insulation coating to obtain core single sheets and laminating the core single sheets, the method including: pressurizing two or more electrical steel strips using a guide roller to temporarily bond the electrical steel strips immediately before the punching; and obtaining the core single sheets by performing the punching after inserting the two or more electrical steel strips after the temporary bonding into a punching die.
Claims16
A method of manufacturing a laminated core, using a manufacturing device, the method comprising:
- pressurizing two or more electrical steel strips including an insulation coating using a guide roller of the manufacturing device to temporarily bond the two or more electrical steel strips;
- temporarily bonding the two or more electrical steel strips without applying an adhesive immediately before punching;
- inserting the two or more temporarily bonded electrical steel strips into a punching die of the manufacturing device;
- simultaneously punching the two or more electrical steel sheets thereby obtaining core single sheets;
- heating the core single sheets after the punching to bond the core single sheets;
- and
- laminating the core single sheets without applying the adhesive after the punching,
- wherein the two or more electrical steel sheets are not heated before the pressurizing, during the pressurizing, and after the pressurizing and before the punching.
Dependencies are inferred from the claim text.