Title:
RAM MOVING METHOD FOR HYDRAULIC MACHINE, RAM MOVEMENT CONTROLLER, METHOD FOR PREVENTING TRAPPING OF AXIAL PLUNGER PUMP USED FOR THE MACHINE, AND THE PUMP
Document Type and Number:
WIPO Patent Application WO/2001/066341
Kind Code:
A1
Abstract:
When a command to move a ram (5U) is issued, the ram command speed made equal to a constant warmup speed lower than a target speed is commanded until a canceling speed judging unit (75) judges that the speed of the ram (SU) calculated by a ram speed calculating unit (51) reaches a predetermined warmup canceling speed. When the canceling speed judging unit (75) judges that the speed of the ram (5U) exceeds the predetermined warmup canceling speed, the warmup speed is canceled and the ram (5U) is accelerated to the target speed.
Inventors:
KANNO KAZUHIRO (JP)
ARIJI NOBUAKI (JP)
ARIJI NOBUAKI (JP)
Application Number:
PCT/JP2001/001626
Publication Date:
September 13, 2001
Filing Date:
March 02, 2001
Export Citation:
Assignee:
AMADA CO LTD (JP)
KANNO KAZUHIRO (JP)
ARIJI NOBUAKI (JP)
KANNO KAZUHIRO (JP)
ARIJI NOBUAKI (JP)
International Classes:
B21D5/02; B30B15/20; F04B1/20; F04B1/30; F15B9/09; F15B11/046; (IPC1-7): B30B15/20; B21D5/02; F04B1/22
Foreign References:
| JPH01150500A | 1989-06-13 | |||
| JP2001137948A | 2001-05-22 | |||
| JP2000045929A | 2000-02-15 | |||
| US5434785A | 1995-07-18 |
Other References:
See also references of EP 1287979A4
Attorney, Agent or Firm:
Miyoshi, Hidekazu (Toranomon Daiichi Building 2-3 Toranomon
1-chome Minato-ku, Tokyo, JP)
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