Drawing method and apparatus

Details Drawing method and apparatus Drawing method and apparatus

1996-07-22

1997-12-30

Larson, Lowell A.

Metal deforming

By use of closed-die and coacting work-forcer

Cup or shell drawing

72361, B21D 2200, B21D 2221

Patent

active

057017778

ABSTRACT:
A drawing apparatus includes blank holder and an opposing die for holding a blank therebetween, and a punch for drawing the blank. The blank holder and the opposing die include respective blank holding surfaces in which beads, having at least a portion that varies in distance from a drawing profile, are formed. In a drawing method conducted using the apparatus, a blank holder is lowered to hold the blank between the blank holder and the opposing die, and then the blank holder is further lowered so that the held blank is drawn by the punch.

REFERENCES:
Patent Abstracts of Japan, Publication No. JP-A-01 317630, published 22 Dec. 1989 for Application No. JP890027603.
"Zieheinrichtungen im Pressentisch einfach-wirkender Pressen" wt Werkstattstechnik 81 (1991), vol. 81, No. 6, 1 Jun. 1991, pp. 327-330.

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