Title:
EXTRUSION PRESS
Document Type and Number:
WIPO Patent Application WO/2012/173005
Kind Code:
A1
Abstract:
The present invention provides an extrusion press with which it is possible to eliminate nonuniformity in the degree of dynamic/thermal fatigue of electrical devices, control devices, and the like that drive hydraulic devices and hydraulic pumps forming a hydraulic circuit in an extrusion press, and with which it is possible to standardize the degree of dynamic/thermal fatigue and the residual life of the aforementioned component devices, and which has a superior energy-saving effect.
With this extrusion press, multiple variable-capacity hydraulic pumps are connected in parallel to supply operating oil to the hydraulic cylinder of the extrusion press, with the required discharge amount for the hydraulic pumps being determined on the basis of a preset operating speed, and the hydraulic pumps being selectively controlled and driven, and with the order of selection of the hydraulic pumps which are being selectively controlled and driven being controlled by programs which are performed sequentially when a prescribed number of formation cycles has been completed.
Inventors:
YAKUSHIGAWA ATSUSHI (JP)
YAMAMOTO TAKEHARU (JP)
YAMAMOTO TAKEHARU (JP)
Application Number:
PCT/JP2012/064314
Publication Date:
December 20, 2012
Filing Date:
June 01, 2012
Export Citation:
Assignee:
UBE MACHINERY CORP LTD (JP)
YAKUSHIGAWA ATSUSHI (JP)
YAMAMOTO TAKEHARU (JP)
YAKUSHIGAWA ATSUSHI (JP)
YAMAMOTO TAKEHARU (JP)
International Classes:
B21C23/21; F15B11/00; F15B11/02; H02P5/00; F04B49/06
Foreign References:
| JPS5659005A | 1981-05-22 | |||
| JPH1172087A | 1999-03-16 | |||
| JPH0469684U | 1992-06-19 | |||
| JPH0483729U | 1992-07-21 | |||
| JPS6353002U | 1988-04-09 | |||
| JPS6138182A | 1986-02-24 |
Attorney, Agent or Firm:
AOKI, Atsushi et al. (JP)
Aoki 篤 (JP)
Aoki 篤 (JP)
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Claims: