Rotary draw bending apparatus and method

Details Rotary draw bending apparatus and method Rotary draw bending apparatus and method

1993-07-02

1994-05-31

Jones, David

Metal deforming

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

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

72159, B21D 704

Patent

active

053158520

ABSTRACT:
A rotary die pipe bending apparatus comprising a bend die mounted for rotation about a bending axis and a clamp die for clamping a pipe to the bend die. The clamp die holds the pipe to be bent as the bend die and the clamp die rotate about the bending axis. A pressure die directed against an outer surface of the pipe for restraining a portion of the pipe spaced away from the bend to be formed in the pipe. A reverse die engaged with an inner surface of the pipe at a location spaced away from the clamp and bend dies and near the pressure die for resisting the bowing of the pipe in back of the bend die and for avoiding the formation of an indentation at the end of the bend.

REFERENCES:
patent: 2812004 (1957-11-01), Huet
patent: 3242710 (1966-03-01), Hamlin
patent: 3303683 (1967-02-01), Schmidt
patent: 4959984 (1990-10-01), Trudell et al.

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