Title:
プレス成形品の製造方法及び製造装置
Document Type and Number:
Japanese Patent JP6551553
Kind Code:
B2
Abstract:
A press formed product includes a top panel part, vertical wall parts, and ridge line parts between the vertical wall parts and the top panel part, and includes a shape-changing part in a part of the ridge line parts. A producing method of the press formed product includes a preparation step of preparing a metal sheet as a starting material; and a press working step of performing press working on the starting material by using a punch, a pad arranged opposed to a front end surface of the punch, and a die capable of receiving the pad. The press working step includes: during a time period from when pushing-in of the starting material into the die by the punch is started or immediately thereafter until the pushing-in of the punch with respect to the die reaches a predetermined distance short of a bottom dead point for the pushing-in, holding the pad at a position distant from the punch by the predetermined distance; when the pushing-in of the punch with respect to the die reaches the predetermined distance short of the bottom dead point, receiving the pad in the die; and continuing the pushing-in of the punch with respect to the die and the pad to the bottom dead point, so as to form the top panel part, the ridge line parts, and the vertical wall parts.
Inventors:
Ryuichi Nishimura
Yoshiaki Nakazawa
Ryo Yonebayashi
Koichi Sato
Yoshiaki Nakazawa
Ryo Yonebayashi
Koichi Sato
Application Number:
JP2018003120A
Publication Date:
July 31, 2019
Filing Date:
January 12, 2018
Export Citation:
Assignee:
Nippon Steel Corporation
International Classes:
B21D22/26; B21D24/00
Domestic Patent References:
| JP2009255116A | ||||
| JP2013202665A | ||||
| JP2011195103A | ||||
| JP2009113797A | ||||
| JP8001243A | ||||
| JP2014141181A | ||||
| JP2008189126A | ||||
| JP2009248585A | ||||
| JP2012024837A | ||||
| JP2010082660A | ||||
| JP2011218388A | ||||
| JP11319963A |
Foreign References:
| WO2014042067A1 |
Attorney, Agent or Firm:
Ascend Patent Business Corporation