Invention Grant
- Patent Title: Die cushion control device
- Patent Title (中): 模具缓冲控制装置
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Application No.: US11908485Application Date: 2006-03-13
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Publication No.: US07918120B2Publication Date: 2011-04-05
- Inventor: Yuichi Suzuki
- Applicant: Yuichi Suzuki
- Applicant Address: JP Tokyo JP Ishikawa
- Assignee: Komatsu Ltd.,Komatsu Industries Corp.
- Current Assignee: Komatsu Ltd.,Komatsu Industries Corp.
- Current Assignee Address: JP Tokyo JP Ishikawa
- Agency: Holtz, Holtz, Goodman & Chick, PC
- Priority: JP2005-075336 20050316
- International Application: PCT/JP2006/304858 WO 20060313
- International Announcement: WO2006/098256 WO 20060921
- Main IPC: B21J9/18
- IPC: B21J9/18 ; B21D22/00 ; B21C51/00

Abstract:
A die cushion controller controls an ascending/descending speed of a die cushion pad based on a preset pressure pattern and positional pattern. A position/pressure control switching unit constantly monitors and compares a first speed command signal υpc corresponding to a pressure deviation signal ep and a second speed command signal υhc corresponding to a position deviation signal eh, and selects a smaller one of the speed command signals to be sent to a speed control unit.
Public/Granted literature
- US20090025444A1 DIE CUSHION CONTROL DEVICE Public/Granted day:2009-01-29
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