Metal deforming – By use of closed-die and coacting work-forcer – Cup or shell drawing
Patent
1990-10-12
1991-11-19
Larson, Lowell A.
Metal deforming
By use of closed-die and coacting work-forcer
Cup or shell drawing
72351, B21D 2416
Patent
active
050656066
ABSTRACT:
A press assembly is operable between open and closed conditions to deform a workpiece. During operation of the press assembly, the workpiece is held by upper and lower draw rings which apply pressure to opposite sides of the workpiece. A cushion assembly is operable to provide a yieldable force opposing movement of the draw rings. An auxiliary apparatus is operable to perform an operation on the workpiece while the workpiece is in the press assembly. A control valve is operable to a closed condition to block fluid flow from the cushion assembly to maintain the cushion assembly in a retracted condition during at least an initial portion of the operation of the press assembly from the closed condition to the open condition. During operation of the press assembly from the open condition toward the closed condition, the piston in a control cylinder is movable under the influence of force transmitted from the upper draw ring to pump fluid to both the cushion assembly and the auxiliary apparatus.
REFERENCES:
patent: 1638881 (1927-08-01), Rode
patent: 2689539 (1954-09-01), Lyon
patent: 3456478 (1969-07-01), Alexander
patent: 3914978 (1975-10-01), Sekanina et al.
patent: 4499750 (1985-02-01), Gerber et al.
patent: 4635466 (1987-01-01), Seki et al.
patent: 4821552 (1989-04-01), Baur et al.
Larson Lowell A.
Teledyne Industries Inc.
LandOfFree
Press assembly with cushion assembly and auxiliary apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Press assembly with cushion assembly and auxiliary apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Press assembly with cushion assembly and auxiliary apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1361931