Title: Effects of lubrication on shearing process of electrical silicon steels

Authors: Yiwei Zhu; Qiusheng Yan; Jiabin Lu; Biao Tang

Addresses: Faculty of Automotive and Transportation Engineering, Guangdong Normal University of Technology, Guangzhou, 510665, Guangdong, China ' Faculty of Electromechanical Engineering, Guangdong University of Technology, Guangzhou, 510006, Guangdong, China ' Faculty of Electromechanical Engineering, Guangdong University of Technology, Guangzhou, 510006, Guangdong, China ' China Railway Construction Heavy Industry Corporation Limited, Changsha, 410100, Hunan, China

Abstract: In order to improve the shearing section quality of electrical silicon steels, the shearing force and section quality of oblique-shearing electrical silicon steels were studied under the states of no lubrication, liquid lubrication, and solid lubrication. The shearing contact mechanical model of oblique shearing electrical silicon steels was established to reveal the mechanism of the influence of lubrication on the shearing force in the shearing contact zone. The shearing force, section burr, shear surface rollover, surface hardening and other shearing characteristics were studied by experiments. The analysis showed that during the plate shearing process, the addition of lubrication reduces the friction between the tool and the plate, reduces the plate movement, delays the generation and expansion of cracks, and improves the shearing quality. This study can provide a reference for improving the shearing and machining quality of motor core material.

Keywords: electrical silicon steels; oblique shear; lubrication; fracture surface; surface integrity.

DOI: 10.1504/IJMMP.2023.128413

International Journal of Microstructure and Materials Properties, 2023 Vol.16 No.4, pp.303 - 319

Accepted: 11 Jul 2022
Published online: 20 Jan 2023 *