Invention Application
US20090025449A1 CUSHION LOAD CONTROL DEVICE AND PRESS MACHINE HAVING CUSHION LOAD CONTROL DEVICE
审中-公开
垫圈负载控制装置和具有楔形负载控制装置的压力机
- Patent Title: CUSHION LOAD CONTROL DEVICE AND PRESS MACHINE HAVING CUSHION LOAD CONTROL DEVICE
- Patent Title (中): 垫圈负载控制装置和具有楔形负载控制装置的压力机
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Application No.: US12280824Application Date: 2007-02-21
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Publication No.: US20090025449A1Publication Date: 2009-01-29
- Inventor: Dai Onishi
- Applicant: Dai Onishi
- Applicant Address: JP Tokyo
- Assignee: IHI CORPORATION
- Current Assignee: IHI CORPORATION
- Current Assignee Address: JP Tokyo
- Priority: JP049544/2006 20060227
- International Application: PCT/JP2007/053184 WO 20070221
- Main IPC: B21D22/00
- IPC: B21D22/00 ; B21J13/04
Abstract:
A cushion load control device for a press machine includes a hydraulic cylinder 2 forming a die cushion, a hydraulic control valve 4 connected to the hydraulic cylinder 2, a hydraulic source 6 connected to the hydraulic cylinder 2 via the hydraulic control valve 4, an opening degree controlling part 11 for outputting a control signal for controlling an opening degree of the hydraulic control valve 4 on the basis of the set pressure value of the hydraulic cylinder, a speed detection unit 15 for detecting the lowering speed of the die cushion, and a signal correction part 18 for correcting the value of the control signal in accordance with the set pressure value and the lowering speed value detected by the speed detection unit 15.
Information query
