公开(公告)号：US11732317B2

公开(公告)日：2023-08-22

申请号：US16750373

申请日：2020-01-23

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Tomoaki Ihara ,  Shunsuke Tobita

IPC: C21D1/42 ,  B21D28/26

CPC classification number: C21D1/42 ,  B21D28/26 ,  C21D2221/02 ,  C21D2261/00

Abstract: A method for processing a steel plate capable of removing residual strain at a trim edge thereof without causing overheating in areas of the steel plate other than the trim edge. A method of processing a steel plate includes punching a steel plate and disposing heating electrodes in such a way that a trim edge punched in the punching is positioned between electrode surfaces facing each other and then heating a part of the steel plate including the trim edge.

公开(公告)号：US11565301B2

公开(公告)日：2023-01-31

申请号：US17140178

申请日：2021-01-04

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Shunsuke Tobita ,  Tetsuji Egawa ,  Masahide Tatsutomi

IPC: B21D28/26

Abstract: A metal member manufacturing method according to one form of this disclosure is a method of manufacturing a metal member that is thinner at some portions than at other portions. The method includes a formation step of pressing one surface of surfaces of a metal workpiece that are perpendicular to a thickness direction with a press-working die so as to form a raised portion in the other surface, and a cutting step of moving a cutting blade along the other surface to cut off the raised portion by shaving. In the formation step, the raised portion is formed such that the area of a cross-section of the raised portion that is parallel to a moving direction of the cutting blade and perpendicular to the other surface decreases toward an end of the raised portion on a rear side in the moving direction of the cutting blade.

公开(公告)号：US20200238360A1

公开(公告)日：2020-07-30

申请号：US16732780

申请日：2020-01-02

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Tomoaki Ihara ,  Shunsuke Tobita

IPC: B21D28/26

Abstract: A method for processing a steel plate includes punching a steel plate as a workpiece fixed to a punching die by a punch, making a first heating electrode provided on a punch holder for supporting the punch and a second heating electrode provided on the punching die face each other by maintaining the punch in a state in which the punch penetrates the steel plate and heating a part of the steel plate including a trim edge punched in the punching, and pulling out the punch from the punching die.

公开(公告)号：US11383288B2

公开(公告)日：2022-07-12

申请号：US16732780

申请日：2020-01-02

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Tomoaki Ihara ,  Shunsuke Tobita

IPC: B21D28/26

Abstract: A method for processing a steel plate includes punching a steel plate as a workpiece fixed to a punching die by a punch, making a first heating electrode provided on a punch holder for supporting the punch and a second heating electrode provided on the punching die face each other by maintaining the punch in a state in which the punch penetrates the steel plate and heating a part of the steel plate including a trim edge punched in the punching, and pulling out the punch from the punching die.