Metal deforming – By use of non-deforming work-gripping clamp and relatively... – Plural or complex apparatus
Patent
1974-12-09
1976-05-25
Larson, Lowell A.
Metal deforming
By use of non-deforming work-gripping clamp and relatively...
Plural or complex apparatus
72218, 72321, B21D 7024
Patent
active
039584402
ABSTRACT:
A universal tube bending machine includes a frame mounting an upper die clamp with a downturned channel. A support arm is pivoted to the frame and mounts a corresponding lower die clamp with an upturned tube receiving channel to grip the tube to be bent. A lower bending die is secured upon said arm outwardly of the lower die clamp, having an arcuate channel to receive the tube and of a predetermine radius corresponding to the desired bending radius for said tube. A power reciprocated bending arm including a depending die block is rotatably mounted on the frame on a center corresponding to the lower bending die, and has a downwardly opening tube engaging channel. The bending die block is adapted to rotate in the range of 1.degree. to 180.degree. making a corresponding bend in the tube. A power cylinder and rod on the frame operatively holds the arm, the lower die clamp and the lower bending die in registry with the tube during bending and thereafter is adapted to retract the lower die clamp and bending die. The bending die block is adapted to retract to inoperative position. A spindle axially engages the tube for successively and alternately advancing and rotating the tube angularly.
REFERENCES:
patent: 632635 (1899-09-01), Bragger
patent: 1462673 (1923-07-01), Wheeler
patent: 2452050 (1948-10-01), Hayward
patent: 3505852 (1970-04-01), Sassak
patent: 3662575 (1972-05-01), Zmuda
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