Metal deforming – By use of closed-die and coacting work-forcer – Cup or shell drawing
Patent
1996-05-15
1997-04-29
Larson, Lowell A.
Metal deforming
By use of closed-die and coacting work-forcer
Cup or shell drawing
7245313, 267119, B21D 2414
Patent
active
056238487
ABSTRACT:
Pressing method and system wherein a drawing operation on blank is performed by die and punch while the blank is held between the die and a pressure ring by a blank holding force which is generated based on a movement resistance of the cushion platen and which is transmitted to the pressure ring through first cylinders and cushion pins, and wherein during a downward movement of the die toward the pressure ring, the cushion platen is moved down against the movement resistance before holding of the blank between the die and the pressure ring, by cooperation of second cylinders disposed on the cushion platen and communicating with the first cylinders, and shock absorbers disposed between the second cylinders and the die or a member moving with the die, so that the speed at which the die collides with the pressure ring is reduced by the downward movement of the pressure ring with the cushion platen.
REFERENCES:
patent: 4635466 (1987-01-01), Seki et al.
patent: 5003807 (1991-04-01), Terrell et al.
Patent Abstract of Japan, vol. 17, No. 365 (M-1442) 9 Jul. 1993 (attached to JP 5-57362).
Larson Lowell A.
Toyota Jidosha & Kabushiki Kaisha
LandOfFree
Pressing method and system wherein cushion platen is lowered by does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Pressing method and system wherein cushion platen is lowered by , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pressing method and system wherein cushion platen is lowered by will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-699165