Stretch form die

Details Stretch form die Stretch form die

1983-08-31

1986-03-18

Crane, Daniel C.

Metal deforming

By use of non-deforming work-gripping clamp and relatively...

By individually non-deforming clamps

72304, 72305, 72414, 72293, B21D 1102

Patent

active

045760306

ABSTRACT:
An apparatus and method relating to an improved die for homogeneously stretch forming sheet metal in standard sized presses without also drawing the sheet metal. The die is comprised of complementary male and female die halves moveable between open and closed positions, and a blank holder member moveable between open and closed positions relative to the female die half. A pair of grippers having mutually facing surfaces is carried by the female die half and the blank holder member. One of the gripper surfaces defines exactly two rectangular shaped beads which extend entirely around the circumference of the male and female die halves, while the other of the gripper surfaces is flat. The beads are equally spaced apart along their lengths and each includes a pair of relatively sharp edges for biting into the sheet metal.

REFERENCES:
patent: 2043591 (1936-06-01), Peterson
patent: 2064160 (1936-12-01), Hochreiter et al.
patent: 3253448 (1966-05-01), Dolney
patent: 3299689 (1967-01-01), Dolney et al.
patent: 3314270 (1967-04-01), Dolney
patent: 3664172 (1972-05-01), Cvacho
patent: 3789649 (1974-02-01), Clowes
patent: 4195510 (1980-04-01), Clowes
patent: 4211102 (1980-07-01), Hurvitz
patent: 4432222 (1984-02-01), Ujihara et al.

Affiliated with

Also associated with

Rating

Stretch form die does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Stretch form die, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Stretch form die will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2299949