Upsetting press main drive

Details Upsetting press main drive Upsetting press main drive

1994-06-29

1996-09-03

Jones, David

Metal deforming

With means to drive tool

Including pneumatic- or fluid-actuated tool support

72206, 7245318, B21J 718

Patent

active

055512763

ABSTRACT:
A method of operating pressing tools of an upsetting press for rolling stock and an upsetting press for reducing the width of rolling stock, wherein pressing tools arranged on both sides of the rolling stock each have hydraulic reduction drives which effect a movement of the pressing tools essentially toward each other and away from each other. The upsetting press may include feed drives which are capable of driving the pressing tools in the feeding direction of the rolling stock. The method includes effecting the return strokes of the reduction drives by work pumps, wherein the pressure medium displaced from the pressing cylinders of the reduction drive is received by a pressure medium accumulator, and wherein for the forward strokes the pressure medium from the pressure medium accumulator operates parallel to the work pumps at least until the pressing tools make contact with the rolling stock.

REFERENCES:
patent: 4235088 (1980-11-01), Kreiskorte
patent: 4578983 (1986-04-01), Kimura
patent: 5379628 (1995-01-01), Pahnke et al.

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