Bending tooling for bending flat blanks

Details Bending tooling for bending flat blanks Bending tooling for bending flat blanks

1990-06-01

1991-11-05

Jones, David

Metal deforming

By relatively movable offset tool-faces

Embodying three or more coacting relatively movable tools

72381, 72401, 72407, B21D 501

Patent

active

050622897

ABSTRACT:
Stamping and forming apparatus (54) has a bending station in which blanks (28,28'), which extend from the two side edges of strip material (4), are reversely bent (180) degrees in opposite directions so that the end portions (36a,36a') of the reversely bent blanks extend back towards the carrier strip (4). The apparatus has first and second tooling assemblies (86,86') which are on ram assemblies (72,72'). The ram assemblies move relatively towards and away from each other with the strip positioned (4) between the tooling assemblies. Each tooling assembly (86,86') has a mandrel (44,44') around which the blank (28,28') is bent and each tooling assembly has two bending sets of tooling therein, a primary bending set (46,46') and a secondary bending set (50/50') for bending the blank initially through a 90 degree angle and then completing the bending operation to form a 180 degree bend.

REFERENCES:
patent: 2175679 (1939-10-01), Beatty
patent: 3677059 (1972-07-01), Miller et al.
patent: 3967487 (1976-07-01), Stout
patent: 4211099 (1980-07-01), McGonigal et al.
patent: 4497196 (1985-02-01), Bakermans et al.
patent: 4658625 (1987-04-01), Koyama et al.
patent: 4819476 (1989-04-01), Bakermans et al.
patent: 4821556 (1989-04-01), Bakermans et al.
patent: 4887452 (1989-12-01), Bakermans

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