METHOD FOR HOT-PRESSING STEEL SHEET BY MEANS OF SERVO PRESS, AND SERVO PRESS

WIPO Patent Application WO/2012/020569

A1

Provided are a method for hot-pressing a steel sheet by means of a servo press, and a servo press, wherein a holding torque is not applied to a servo motor when the bottom dead center of a slide is being maintained. A method for hot-pressing a steel sheet (18) by means of a servo press (100) in which: a first, second, third, and fourth connecting rod (31a, 31b, 31c, 31d) are contained in a first, second, third, and fourth slide driving mechanism (22a, 22b, 22c, 22d) driven by means of a first, second, third, and fourth servo motor (21a, 21b, 21c, 21d); and a first, second, third, and fourth slide adjusting device (37a, 37b, 37c, 37d) are disposed on the bottom end side of the leg section (33a, 33b, 33c, 33d) of the first, second, third, and fourth connecting rods (31a, 31b, 31c, 31d). The method for hot-pressing the steel sheet (18) by means of the servo press (100) involves maintaining the leg section of the connecting rods in a vertical position at the bottom dead center of a slide (12) for a predetermined time (t), and subjecting the steel sheet (18) to a molding process by means of an upper mold (13) and a bottom mold (15) and to carburization.

JP2624115	LAMINATED DRAWING METHOD
JP2687536	INDUSTRIAL APPLICABILITY [Title of Invention] A press molding method for a bonding material

NAKAMURA KAZUYUKI (JP)

PCT/JP2011/004529

February 16, 2012

August 10, 2011

Click for automatic bibliography generation  

HITACHI ZOSEN FUKUI CORP (JP)
NAKAMURA KAZUYUKI (JP)

B21D22/20; B21D24/00; B30B15/14

JP2006026637A	2006-02-02
JP2008100238A	2008-05-01
JP2000033494A	2000-02-02
JPH1058504A	1998-03-03
JP2002282951A	2002-10-02

SHIRASAKI, SHINJI (JP)
Shinji Shirasaki (JP)

View/Download PDF      PDF Help

Previous Patent: ENGINE SYSTEM AND SHIP

Next Patent: PLASTIC POLARIZING LENS, METHOD FOR PRODUCING SAME, AND POLARIZING FILM