Metal deforming – By use of closed-die and coacting work-forcer – Cup or shell drawing
Patent
1996-03-05
1997-04-29
Larson, Lowell A.
Metal deforming
By use of closed-die and coacting work-forcer
Cup or shell drawing
B21D 2200, B21D 2221
Patent
active
056238479
ABSTRACT:
Deep drawing of a work can be made by securing a certain amount of feed of the work from the side of a cushion ring to a vertical wall surface of a stationary die. In this drawing method, for the drawing of the work, a die part interlocked to a movable die is engaged in a recess of the stationary die in a direction different from the direction of pushing. An edge of the work is displaced in unison with the cushion ring and the movable die clamping it in cooperation, and the die part starts to push the work immediately before the instant when the work located in the vicinity of the cushion ring is brought into contact with the edge of the recess of the stationary die. The resistance of contact between the work and the stationary die thus is not increased in the vicinity of the cushion ring when the die part pushes the work, and a certain amount of feed of the work from the side of the cushion ring can be secured.
REFERENCES:
patent: 4754635 (1988-07-01), Van Den Berg et al.
"Development and Practical Use of New Method in Press Molding", Quality Control Journal, published May 1995 (6 pages).
"Integral Molding of Luggage Outer Panel and Housing", material delivered in a meeting of Technical Society for Molding of Thin Steel Plate held on Mar. 9, 1995 (10 pages).
Hiyama Hiroshi
Kosaka Takashi
Tamada Kenji
Uchiyama Yoshihiro
Butler Rodney A.
Larson Lowell A.
Toyota Jidosha & Kabushiki Kaisha
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