Invention Grant
- Patent Title: Press machine
- Patent Title (中): 压机
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Application No.: US13819740Application Date: 2011-08-09
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Publication No.: US09138794B2Publication Date: 2015-09-22
- Inventor: Wataru Imaeda , Akinobu Watanabe
- Applicant: Wataru Imaeda , Akinobu Watanabe
- Applicant Address: JP Kyoto
- Assignee: Murata Machinery, Ltd.
- Current Assignee: Murata Machinery, Ltd.
- Current Assignee Address: JP Kyoto
- Agency: Keating & Bennett, LLP
- Priority: JP2010-201879 20100909
- International Application: PCT/JP2011/068096 WO 20110809
- International Announcement: WO2012/032892 WO 20120315
- Main IPC: B21D5/02
- IPC: B21D5/02 ; B30B15/02 ; B30B1/23 ; B30B1/18 ; B30B1/32 ; B30B15/16 ; B30B15/18

Abstract:
A press machine includes a lifting mechanism that selectively lowers and lifts a die on a movable side. The lifting mechanism includes a motor driven lifting unit using a servomotor as a drive source thereof, and a hydraulically driven lifting unit using a hydraulic actuator as a drive source thereof. The lifting mechanism is controlled so as to enable the motor driven lifting unit to move the die on the movable side from a standby position to a drive system changeover position immediately before a press start position at which the die on the movable side starts contacting a workpiece to be processed and so as to enable the hydraulically driven lifting unit to move the die on the movable side from the drive system changeover position to a top dead center position.
Public/Granted literature
- US20130152661A1 PRESS MACHINE Public/Granted day:2013-06-20
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