Invention Application
- Patent Title: DIE CUSHION DEVICE
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Application No.: US17553418Application Date: 2021-12-16
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Publication No.: US20220193748A1Publication Date: 2022-06-23
- Inventor: Tadahiro Kondo
- Applicant: AIDA ENGINEERING, LTD.
- Applicant Address: JP Kanagawa
- Assignee: AIDA ENGINEERING, LTD.
- Current Assignee: AIDA ENGINEERING, LTD.
- Current Assignee Address: JP Kanagawa
- Priority: JP2020-209828 20201218
- Main IPC: B21D24/02
- IPC: B21D24/02 ; B21D24/14 ; B21D24/08 ; B30B15/16

Abstract:
The die cushion device according to the present invention includes a first hydraulic cylinder and a second hydraulic cylinder that are independently and simultaneously controlled. When a cushion pad is pre-pressurized, pressure control is performed on the first hydraulic cylinder via a first hydraulic circuit so that a pressure in a lower chamber of the first hydraulic cylinder is pre-pressurized to a preset pressure, and position control is simultaneously performed on the second hydraulic cylinder via a second hydraulic circuit so that the cushion pad is held in the die cushion standby position. A force with which the first hydraulic cylinder moves the cushion pad upward is balanced with a force with which the second hydraulic cylinder moves the cushion pad downward (a force for holding the die cushion standby position).
Public/Granted literature
- US12023723B2 Die cushion device Public/Granted day:2024-07-02
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