US 12,328,041 B2
Electrical steel sheet machining method, motor, and motor core production method
Souichiro Yoshizaki, Tokyo (JP); Yukino Miyamoto, Tokyo (JP); and Yoshiaki Zaizen, Tokyo (JP)
Assigned to JFE STEEL CORPORATION, Tokyo (JP)
Appl. No. 17/907,670
Filed by JFE STEEL CORPORATION, Tokyo (JP)
PCT Filed Feb. 16, 2021, PCT No. PCT/JP2021/005743
§ 371(c)(1), (2) Date Sep. 29, 2022,
PCT Pub. No. WO2021/205752, PCT Pub. Date Oct. 14, 2021.
Claims priority of application No. 2020-068482 (JP), filed on Apr. 6, 2020.
Prior Publication US 2023/0127911 A1, Apr. 27, 2023
Int. Cl. H02K 15/02 (2025.01); B23K 26/38 (2014.01); B23K 101/36 (2006.01)
CPC H02K 15/02 (2013.01) [B23K 26/38 (2013.01); B23K 2101/36 (2018.08)] 13 Claims
OG exemplary drawing
 
1. An electrical steel sheet machining method comprising:
Machining an electrical steel sheet to a predetermined shape by melt-cutting the electrical steel sheet using a laser,
Wherein a scanning rate in the melt-cutting is 10000 mm/min or more, and
Wherein a power P in W of the laser and a scanning rate in s in mm/min of the laser satisfy the following formula in relation to a thickness t in mm of the electrical steel sheet:
500t+50≤P/s×12000≤2000t+100  (1).