Title:
PRESS MACHINE
Document Type and Number:
WIPO Patent Application WO/2012/032892
Kind Code:
A1
Abstract:
A press machine is provided with a lifting and lowering mechanism (27) for lifting a movable die. The lifting and lowering mechanism (27) has a motor drive system-based lifting and lowering mechanism (30) using a servo motor (31) as the drive source, a hydraulic drive system-based lifting and lowering mechanism (40) using a hydraulic actuator (41) as the drive source. The lifting and lowering mechanism (27) is controlled in such a manner that the movable die is moved by the motor drive system-based lifting and lowering mechanism (30) from a standby position to a drive system changeover position which is a position immediately before a press start position at which the movable die starts to come into contact with a workpiece, and the movable die is moved by the hydraulic drive system-based lifting and lowering mechanism (40) from the drive system changeover position to the position of the bottom dead end point.
Inventors:
IMAEDA WATARU (JP)
WATANABE AKINOBU (JP)
WATANABE AKINOBU (JP)
Application Number:
PCT/JP2011/068096
Publication Date:
March 15, 2012
Filing Date:
August 09, 2011
Export Citation:
Assignee:
MURATA MACHINERY LTD (JP)
IMAEDA WATARU (JP)
WATANABE AKINOBU (JP)
IMAEDA WATARU (JP)
WATANABE AKINOBU (JP)
International Classes:
B21D5/02; B30B1/18; B30B1/32
Foreign References:
| JP2006150422A | 2006-06-15 | |||
| JPH10180499A | 1998-07-07 | |||
| JP3558679B2 | 2004-08-25 | |||
| JP2004188460A | 2004-07-08 |
Other References:
See also references of EP 2614899A4
Attorney, Agent or Firm:
SUGIMOTO, Shuji et al. (JP)
Shuji Sugimoto (JP)
Shuji Sugimoto (JP)
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Claims:
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