Metal deforming – By use of closed-die and coacting work-forcer – With stripping or ejecting from tool
Patent
1988-01-25
1989-06-20
Spruill, Robert L.
Metal deforming
By use of closed-die and coacting work-forcer
With stripping or ejecting from tool
72347, 72351, 92 27, 92 28, 267119, B21D 4504, B21D 2220
Patent
active
048400556
ABSTRACT:
A drawing apparatus in a press for holding the sheet metal part during the drawing and for the ejection thereof. Additionally, blocking devices are provided which prevent the ejection of the sheet metal draw part at the same time with the upward movement of the press ram. Each blocking device is thereby to be rendered selectively operable or inoperable. A continuous flow of the hydraulic liquid is to be precluded during the inoperative condition of the blocking device. The blocking device consists of a pressure cylinder, of a pressure piston which is displaceably movable on the piston rod displaceable by the draw cushion, and of a compression spring for the displacement of the pressure piston in the ejection direction. The pressure space formed above the pressure piston is selectively pressureless for the inoperative condition, respectively, adapted to be acted upon with controlled pressure for the operative condition of the blocking device. The arrangement enables, on the one hand, the operation of a press and especially of a transfer press with large stroke numbers; with the latter without the operation of the transfer device effecting the transfer movement of the sheet metal draw parts, on the other, the operation with reduced stroke number of the press under utilization of the blocking device.
REFERENCES:
patent: 1846439 (1932-02-01), Rode et al.
patent: 2584339 (1952-02-01), Georgeff
patent: 3005431 (1961-10-01), Moller
patent: 3237726 (1966-03-01), Deyerling
patent: 3456478 (1969-07-01), Alexander
patent: 3575087 (1971-04-01), Sherwood
patent: 4185539 (1980-01-01), Stratienko
patent: 4524676 (1985-06-01), Rogers
Kaletka Martin
Michael Wolfgang
L. Schuler GmbH
Spruill Robert L.
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