Title:
OUTER LOAD CONTROLLER OF PRESS
Document Type and Number:
WIPO Patent Application WO/1991/001215
Kind Code:
A1
Abstract:
An outer load controller of a press which is directed to obtaining high accuracy in pressure regulation and improving responsiveness. The controller includes a logic valve (5) which is connected between the hydraulic chamber (3c) of a hydraulic cylinder (3) disposed at each point (2) of an outer slide (1) and an overload protector (6) and which performs a relief function under overload, and a servo valve (16) controlled in accordance with a point generation load calculated at each descent position of the slide. An oil pressure inside the hydraulic chamber is variably controlled by the servo valve in the controller.
Inventors:
MORIYAMA HIDEMI (JP)
Application Number:
PCT/JP1990/000914
Publication Date:
February 07, 1991
Filing Date:
July 13, 1990
Export Citation:
Assignee:
KOMATSU MFG CO LTD (JP)
International Classes:
B30B1/26; B30B15/22; B30B15/28; (IPC1-7): B30B1/26; B30B15/22; B30B15/28
Foreign References:
| JPS6246198U | 1987-03-20 | |||
| JPS62151300A | 1987-07-06 | |||
| JPS623720B2 | 1987-01-26 |
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