Means and method for reducing radius expansion in the bending of

Metal deforming – By deflecting successively-presented portions of work during... – With modification or control of temperature or work – tool or...

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72342, 72364, 72702, 72369, B21D 716, B21D 7024

Patent

active

041226976

ABSTRACT:
A means and method is provided for reducing radius expansion of bent, elongated materials due to "spring-back" occurring after the material is released from the bender clamps of a hot bending apparatus, wherein the longitudinal axis of the unbent portion of the material is displaced by a small angle from a perpendicular to a line running through the center of the bend and the bender heating means.

REFERENCES:
patent: 2812004 (1957-11-01), Huet
patent: 3156287 (1964-11-01), Munro
patent: 3352136 (1967-11-01), Clarke
patent: 3368377 (1968-02-01), Hirayama et al.
patent: 3896649 (1975-07-01), Stuart
patent: 3902344 (1975-09-01), Stuart

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