Shear forming apparatus for elongated non-rotating metal tubes

Details Shear forming apparatus for elongated non-rotating metal tubes Shear forming apparatus for elongated non-rotating metal tubes

1981-05-26

1983-07-05

Larson, Lowell A.

Metal deforming

By use of tool acting during relative rotation between tool...

With tool surface orbiting around axis parallel to direction...

72121, 72422, B21B 1912

Patent

active

043911145

ABSTRACT:
A supply of elongated metal tubes are successively transferred laterally to and from a reducing position aligned with the axis of a hollow spindle, and one end of each tube is clamped by a gripper mechanism mounted on a carriage supported between two vertically spaced horizontal lead screws. Each tube is fed by the carriage onto a non-rotatable mandrel located within a non-rotatable guide tube supported within the spindle. The mandrel is supported by a mandrel rod and a centering cone movable axially on the rod within the guide tube, and the mandrel is positioned within a zone where a set of shear forming wheels are orbited around the metal tube by an annular forming head supported by the spindle. While the head is rotating, the orbiting forming wheels are movable radially in response to movement of an eccentric cam mechanism operated by an actuating tube carried within the spindle. The actuating tube is connected by a thrust bearing to a high thrust, non-rotating fluid cylinder which is adjustable for precisely selecting the orbital path of the forming wheels before the metal tube is pulled through the wheels by the carriage. Power actuated motors are connected to the mandrel support rod for retracting the mandrel and for adjusting the mandrel relative to the orbiting wheels.

REFERENCES:
patent: 1368413 (1921-02-01), Stiefel
patent: 1596751 (1926-07-01), Millspaugh
patent: 3404896 (1968-10-01), Stace et al.
patent: 3431764 (1969-03-01), Kennedy et al.
patent: 4331015 (1982-05-01), Benteler et al.

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