Die for bending a composite flange having a stretch portion and

Details Die for bending a composite flange having a stretch portion and Die for bending a composite flange having a stretch portion and

1992-03-09

1993-05-18

Crane, Daniel C.

Metal deforming

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

With interrelated clamp closer and tool mover

72381, 72347, 723792, B21D 700, B21D 5388

Patent

active

052110478

ABSTRACT:
A bending die includes a first die portion for bending a stretch portion of a composite flange and a second die portion for bending a straight portion of the composite flange. The first die portion has a first inclined surface inclined at a first angle with respect to a horizontal direction, and the second die portion has a second inclined surface inclined at a second angle with respect to the horizontal direction. The second angle is smaller than the first angle. As a result, when the bending die is moved toward the composite flange, the first inclined surface begins to contact the stretch portion before the second inclined surface contacts the straight portion, so that a warp is prevented from being generated in the composite flange.

REFERENCES:
patent: 440051 (1890-11-01), Naylor
patent: 1881517 (1932-10-01), Groehn
patent: 2485649 (1949-10-01), Norquist
patent: 3263637 (1966-08-01), Cox

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