Process and device for pipe bending

Details Process and device for pipe bending Process and device for pipe bending

1991-06-06

1992-07-07

Larson, Lowell A.

Metal deforming

By deflecting successively-presented portions of work during...

By use of work-contacting wiper and moving, work-holding form

72157, B21D 704

Patent

active

051272482

ABSTRACT:
A pipe bending die, in the shape of a cylinder, has a groove gouged out of its lateral surface and a cross section which is a semi-circle of a diameter equal to the diameter of the pipe to be bent. The base of the cylinder is bounded on one hand by a portion of logarithmic spiral defined in polar coordinates by the equation P=Poe-k.theta., bounded by the points .theta.=0 and .theta.=2.pi., and wherein Po and k are positive constants and, on the other hand, by a segment of straight line joining the points of the spiral for which .theta.=0 and .theta.=2.pi..

REFERENCES:
patent: 1714083 (1929-05-01), Frank
patent: 3584492 (1971-06-01), Dodge
patent: 4416136 (1983-11-01), Schwarze
patent: 4537053 (1985-08-01), Schwarze

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