Electric bend head for bending tubes

Details Electric bend head for bending tubes Electric bend head for bending tubes

1987-06-29

1988-08-02

Combs, E. Michael

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

047607270

ABSTRACT:
An electric bend head for bending tubes includes a frame mounting a gear box housing with a rotatable main shaft extending through the housing. A secondary shaft coaxial of the main shaft is journaled within the housing and projects therefrom. A rotatable worm gear within the housing is coaxially mounted upon the secondary shaft and a worm drive gear is journaled upon the housing and in mesh with the worm gear. A variable speed reversible electric motor upon the frame has a main drive shaft, and a transmission interconnects the drive shaft and the worm drive gear. A secondary drive plate is mounted the secondary shaft and a main drive plate is spaced from the secondary plate and mounted upon the main shaft. A bend die of semicircular shape, having an outwardly opening channel, is axially mounted upon the main plate. A clamp die is slidably mounted upon the main plate and has, upon one side, a laterally opening channel, has a retracted position, and a pipe clamping position engaging the bending die and retaining the tube to bent therebetween. A follower interconnects the plates whereby initial rotation of the secondary plate cams the follower and clamp die in clamping position and successively rotates the bending die through a predetermined arc.

REFERENCES:
patent: 1848753 (1932-03-01), Spate et al.
patent: 2583479 (1952-01-01), Froedge
patent: 2667202 (1954-01-01), Froedge
patent: 3584492 (1971-06-01), Dodge et al.
patent: 3974676 (1976-08-01), Eaton
patent: 4552006 (1985-11-01), Yogo

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