Method for controlling the drive for a hydraulic press having a

Details Method for controlling the drive for a hydraulic press having a Method for controlling the drive for a hydraulic press having a

1994-08-30

1996-10-29

Gerrity, Stephen F.

Presses

Methods

60413, 7245302, 7245318, 836395, 100 46, 100 99, 100258R, 10026906, 10026914, B30B 1516, B30B 1524

Patent

active

055687660

ABSTRACT:
A method for controlling the drive of a hydraulic press and an associated device for carrying out the method are proposed, the piston/cylinder unit belonging to a press ram being driven via several hydraulic devices connected in series. Depending on the operating phase of the press, the hydraulic devices are here used as required either as hydraulic motors or hydraulic pumps, which effect a delivery of pressure medium into the respective cylinder chamber.

REFERENCES:
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patent: 2312213 (1943-02-01), Ferris
patent: 2946303 (1960-07-01), Schmmid
patent: 3683666 (1972-08-01), Hassel
patent: 4022096 (1977-05-01), Forichon
patent: 4470287 (1984-09-01), Antonov et al.
patent: 4524582 (1985-06-01), Lucas et al.
patent: 4707988 (1987-11-01), Palmers
patent: 4953458 (1990-09-01), Day
patent: 5170716 (1992-12-01), Durand et al.
Manfred Weck: "Werkzeugmaschinen" [Machine tools]; vol. 1, pp. 103-105, no date.

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