Title:
PRESS FORMING MACHINE, AND METHOD FOR CONTROLLING SAME
Document Type and Number:
WIPO Patent Application WO/2020/261345
Kind Code:
A1
Abstract:
A press forming machine (2) is provided with: a push-down side pump (5) for feeding operating oil into a hydraulic cylinder (3) to push a slide (4) down; a push-down side electric motor (6) for driving the push-down side pump (5); a pull-up side pump (15), which is connected to the hydraulic cylinder (3), for feeding operating oil into the hydraulic cylinder (3) to pull the slide (4) up; and a pull-up side electric motor (16) which drives the pull-up side pump (15) and is capable of regenerative braking. When the slide (4) is being pushed down, speed control or pressure control are performed by means of the pull-up side electric motor (16) that is rotating in reverse, without using a valve to perform speed control or pressure control. This makes it possible for speed control or pressure control of the slide (4) to be performed accurately over a wide range.
Inventors:
KOMIYAMA TAKASHI (JP)
HORAI KENICHI (JP)
KIMURA RYUICHI (JP)
HORAI KENICHI (JP)
KIMURA RYUICHI (JP)
Application Number:
PCT/JP2019/025005
Publication Date:
December 30, 2020
Filing Date:
June 24, 2019
Export Citation:
Assignee:
KURIMOTO LTD (JP)
International Classes:
B30B15/20; B29C43/58
Foreign References:
| JP2006297411A | 2006-11-02 | |||
| US20080202115A1 | 2008-08-28 | |||
| JPH01156023A | 1989-06-19 |
Attorney, Agent or Firm:
MAEDA & PARTNERS (JP)
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