Title:
ダイクッション装置
Document Type and Number:
Japanese Patent JP7381438
Kind Code:
B2
Abstract:
The die cushion device according to the present invention includes a first hydraulic cylinder 120 and a second hydraulic cylinder 130 that are independently and simultaneously controlled. When a cushion pad 110 is pre-pressurized, pressure control is performed on the first hydraulic cylinder 120 via a first hydraulic circuit 140 so that a pressure in a lower chamber 120A of the first hydraulic cylinder 120 is pre-pressurized to a preset pressure, and position control is simultaneously performed on the second hydraulic cylinder 130 via a second hydraulic circuit 150 so that the cushion pad 110 is held in the die cushion standby position. A force with which the first hydraulic cylinder 120 moves the cushion pad 110 upward is balanced with a force with which the second hydraulic cylinder 130 moves the cushion pad 110 downward (a force for holding the die cushion standby position).
Inventors:
Tadahiro Kondo
Application Number:
JP2020209828A
Publication Date:
November 15, 2023
Filing Date:
December 18, 2020
Export Citation:
Assignee:
AIDA ENGINEERING CO., LTD.
International Classes:
B21D24/02
Domestic Patent References:
| JP2014140871A | ||||
| JP724600A | ||||
| JP2017113786A | ||||
| JP201869297A | ||||
| JP61205619U | ||||
| JP2018140405A |
Foreign References:
| US20160271675 |
Attorney, Agent or Firm:
Kenzo Matsuura