Title:
HYDRAULIC PRESS BRAKE
Document Type and Number:
WIPO Patent Application WO/2014/061472
Kind Code:
A1
Abstract:
The pump discharge flow rate of a bidirectional piston pump (31) is set to a reference pump discharge flow rate Qa if the operation state of a lifting/lowering cylinder (15) is in a no-load state, and is set to a small-flow-rate pump discharge flow rate Qb that is smaller than the reference pump discharge flow rate Qa if the operation state of the lifting/lowering cylinder (15) is in a high-load state. The value Qb·Pb found by multiplying the pump discharge flow rate Qb and the pump discharge pressure Pb of the bidirectional piston pump (31) for when the operation state of the lifting/lowering cylinder (15) is in a high-load state is set substantially equal to or less than the value Qa·Pa found by multiplying the pump discharge flow rate Qa and the pump discharge pressure Pa of the bidirectional piston pump (31) for when the operation state of the lifting/lowering cylinder (15) is in a no-load state.
Inventors:
YUKITA TOMOHIRO (JP)
NAKAMURA AKIRA (JP)
OKUBO TAKANORI (JP)
NAKAMURA AKIRA (JP)
OKUBO TAKANORI (JP)
Application Number:
PCT/JP2013/077100
Publication Date:
April 24, 2014
Filing Date:
October 04, 2013
Export Citation:
Assignee:
AMADA CO LTD (JP)
International Classes:
B21D5/02; B30B1/32; B30B15/22; F15B11/00
Foreign References:
| JP2001263254A | 2001-09-26 | |||
| JP2002239636A | 2002-08-27 | |||
| JPH07266086A | 1995-10-17 | |||
| JPH07275946A | 1995-10-24 | |||
| JP2000107814A | 2000-04-18 | |||
| JP2001121299A | 2001-05-08 | |||
| JP2004358518A | 2004-12-24 |
Other References:
See also references of EP 2913113A4
Attorney, Agent or Firm:
MIYOSHI, Hidekazu et al. (JP)
Hidekazu Miyoshi (JP)
Hidekazu Miyoshi (JP)
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