Metal deforming – By use of closed-die and coacting work-forcer – Cup or shell drawing
Patent
1989-10-30
1991-04-02
Larson, Lowell A.
Metal deforming
By use of closed-die and coacting work-forcer
Cup or shell drawing
267119, B21D 2408
Patent
active
050038079
ABSTRACT:
A press assembly is operable from the open condition to a closed condition to deform a workpiece. The press assembly is the operable from the closed condition to an open condition to facilitate removal of the deformed workpiece from the press assembly. During operation of the press assembly, the workpiece is held by upper and lower draw rings or members 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. As the press is operated from the open condition to the closed condition, the lower draw ring is accelerated while the upper draw ring is spaced from the lower draw ring. This reduces shock loading on the press when the upper draw ring and workpiece subsequently impact against the lower draw ring to grip the workpiece. To effect acceleration of the lower draw ring, force is transmitted from the upper draw ring to the cushion assembly to retract the cushion assembly prior to impacting of the upper draw ring and workpiece against the lower draw ring. During operation of the press assembly to the open condition, the lower draw ring is decelerated relative to the upper draw ring before the lower draw ring reaches its initial or open press condition.
REFERENCES:
patent: 487271 (1892-12-01), Hodgon
patent: 1884700 (1932-10-01), Hothersall
patent: 2217172 (1940-10-01), Laussucq
patent: 3296850 (1967-01-01), Fiore
patent: 3456478 (1969-07-01), Alexander
patent: 3488045 (1970-01-01), Balunas, Jr. et al.
patent: 3636748 (1972-01-01), Hall et al.
patent: 3636749 (1972-01-01), Heiser
patent: 4499750 (1985-02-01), Gerber et al.
patent: 4635466 (1987-01-01), Seki et al .
patent: 4754955 (1988-07-01), Otsuka et al.
patent: 4765227 (1988-08-01), Balazs et al.
patent: 4821552 (1989-04-01), Baur et al.
Hiney Leonard L.
Kadis Paul M.
Pfaff Susan E.
Terrell John
Larson Lowell A.
Teledyne Industries Inc.
LandOfFree
Press assembly and method of operation 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 and method of operation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Press assembly and method of operation will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-320326