Proceedings of the
World Congress on Micro and Nano Manufacturing (WCMNM 2022 )
19–22 September 2022, Lueven, Belgium
doi:10.3850/978-981-18-5180-3_RP40-0047
Punch-Edge Sharpening Effect on Process Affected Zone and Punch Wear in Punching Non-Oriented Electrical Steel Sheets
1Faculty of Engineering, University of Toyama, Toyama 930-8555, Japan
2Komatsu-Seiki Kosakusho Co. LTD., Suwa-City, Nagano 392-0012, Japan
3Surface Engineering Design Laboratory, SIT, 3-15-10 Minami-Rokugo, Ota-City, Tokyo 144-0045, Japan
ABSTRACT
Non-oriented electrical steel sheets were punched out to describe the effect of punch edge configuration on the punching characteristics. Three punches were prepared to have the mechanically ground, the ion-milled and the nanotextured surfaces. The cobalt-bound tungsten and cobalt-bound tungsten alloy coated with diamond were used for experiment. The pierced hole sheared surface was observed by scanning electron microscope and the process affected zone in cross-section of pierced hole was analysed by using electron backscatter diffraction. And then, the difference of grain deformation in punch tool conditions were discussed. In addition, the amount of tool wear at the tip of the punch was investigated from the beginning of punching to 50,000th shot, and the effect of the tool finish and tool type on the tool wear was discussed. Therefore, we report the effects of tool edge and tool wear when punching non-oriented electrical steel sheet.
Keywords: Punching, Nanostructure, Ion-Sharpening, Diamond Coating, Non-Oriented Electrical Steel Sheet.
1Faculty of Engineering, University of Toyama, Toyama 930-8555, Japan
2Komatsu-Seiki Kosakusho Co. LTD., Suwa-City, Nagano 392-0012, Japan
3Surface Engineering Design Laboratory, SIT, 3-15-10 Minami-Rokugo, Ota-City, Tokyo 144-0045, Japan
ABSTRACT
Non-oriented electrical steel sheets were punched out to describe the effect of punch edge configuration on the punching characteristics. Three punches were prepared to have the mechanically ground, the ion-milled and the nanotextured surfaces. The cobalt-bound tungsten and cobalt-bound tungsten alloy coated with diamond were used for experiment. The pierced hole sheared surface was observed by scanning electron microscope and the process affected zone in cross-section of pierced hole was analysed by using electron backscatter diffraction. And then, the difference of grain deformation in punch tool conditions were discussed. In addition, the amount of tool wear at the tip of the punch was investigated from the beginning of punching to 50,000th shot, and the effect of the tool finish and tool type on the tool wear was discussed. Therefore, we report the effects of tool edge and tool wear when punching non-oriented electrical steel sheet.
Keywords: Punching, Nanostructure, Ion-Sharpening, Diamond Coating, Non-Oriented Electrical Steel Sheet.
