US 12,434,289 B2
Processing method
Tomoaki Ihara, Toyota (JP)
Assigned to TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Filed by TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Filed on May 25, 2023, as Appl. No. 18/323,565.
Claims priority of application No. 2022-098801 (JP), filed on Jun. 20, 2022.
Prior Publication US 2023/0405660 A1, Dec. 21, 2023
Int. Cl. B21D 37/16 (2006.01); B21D 19/00 (2006.01); B21D 19/08 (2006.01); B21D 28/02 (2006.01); B21D 35/00 (2006.01); C21D 1/10 (2006.01); C21D 1/42 (2006.01); C21D 9/00 (2006.01); H05B 6/40 (2006.01)
CPC B21D 37/16 (2013.01) [B21D 19/08 (2013.01); B21D 28/02 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A processing method comprising:
punching a steel plate to open a part of an end surface of the steel plate to form an open trim edge;
disposing a heating coil in a non-contact manner along the end surface of the open trim edge formed in the punching to sandwich the end surface of the open trim edge therebetween, so that the heating coil is disposed on a first side of the end surface of the open trim edge and on a second side of the end surface of the open trim edge; and
heating the end surface of the open trim edge by applying an alternating current to the heating coil to generate an induced electromotive force on the steel plate, wherein
a current direction of the heating coil that is disposed on the first side of the end surface of the open trim edge is opposite to a current direction of the heating coil that is disposed on the second side of the end surface of the open trim edge.