Metal deforming – By use of closed-die and coacting work-forcer – Cup or shell drawing
Patent
1994-05-06
1996-04-09
Larson, Lowell A.
Metal deforming
By use of closed-die and coacting work-forcer
Cup or shell drawing
B21D 2404
Patent
active
055050719
ABSTRACT:
A pair of forming elements incorporate features which restrain a thin foil workpiece without requiring high or excessive clamping pressures. A retaining step is provided in the second forming element having the forming cavity. It has been found that thin foil workpieces bent over and engaged by contact with the retaining step are secured against slippage with reduced clamping pressures. Moreover, the thin foil workpieces exhibit material draw during forming without the excessive lateral pressure between clamping surfaces that causes wrinkles. Substantially wrinkle-free flanges remain in the formed article.
REFERENCES:
patent: 2422883 (1947-06-01), Bruderlin
patent: 2745173 (1956-05-01), Janos
patent: 3789649 (1974-02-01), Clowes
patent: 4748837 (1988-06-01), Kurosawa et al.
patent: 4833903 (1989-05-01), de Smet
patent: 5090981 (1992-02-01), Rusek, Jr.
patent: 5094899 (1992-03-01), Rusek, Jr.
patent: 5376424 (1994-12-01), Watanabe
Hall, Jr. Herbert L.
Rusek, Jr. Stanley J.
Woodside Margaret M.
Gegenheimer C. Michael
Gillespie Ted C.
Larson Lowell A.
Owens--Corning Fiberglas Technology, Inc.
LandOfFree
Apparatus and method for retention of thin foils during forming does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus and method for retention of thin foils during forming, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus and method for retention of thin foils during forming will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-131785