Adjustable clamp die for tube bending machine

Details Adjustable clamp die for tube bending machine Adjustable clamp die for tube bending machine

1997-11-13

1999-07-06

Hail, III, Joseph J.

Metal deforming

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

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

B21D 704

Patent

active

059184965

ABSTRACT:
A clamp die apparatus for co-operating with the bend die of a tube bending apparatus during tube bending has a support bolster adapted for adjustable mounting on a bend arm of a tube bending machine and a primary clamp die rigidly mounted on the support bolster for clamping a portion of a tube against a bend die of the bend arm. A secondary clamp die is movably mounted on the support bolster for movement between an extended position alongside the primary clamp die and a retracted position spaced rearwardly from the primary clamp die. Each clamp die has a clamping surface for bearing against a portion of a tube to be bent, and the clamping surfaces of the primary and secondary clamp dies are aligned to form a clamping surface of extended length when the secondary clamp die is in the extended position. The primary clamp die alone forms a reduced length clamping surface when the secondary clamp die is in the retracted position.

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patent: 4843859 (1989-07-01), Togoshi
patent: 4888971 (1989-12-01), Schwarze

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