Machine for automatically straightening-out elongate workpieces

Details Machine for automatically straightening-out elongate workpieces Machine for automatically straightening-out elongate workpieces

1979-07-19

1981-12-22

Larson, Lowell A.

Metal deforming

With use of control means energized in response to activator...

Metal deforming by use of roller or roller-like tool element

72389, 72 12, B21D 712, B21D 700

Patent

active

043064353

ABSTRACT:
A method and apparatus for straightening longitudinal curvature of a workpiece by a bending action involves supporting the workpiece between two supporting members, rotating the workpiece, engaging a plurality of sensors with the peripheral surface of the workpiece at longitudinally spaced-apart locations and generating with the sensors first periodic electric signals proportional to the apparent radius at the location of the sensors, whereby the signals are an indication of longitudinal curvature and of any deviation of the cross-sectional shape of the workpiece from a true circle, transforming the first signals into second electric signals the magnitude of which varies with the law of variation corresponding to the first harmonic of the development in Fourier's series of the first signals and the frequency of which equals the frequency of rotation of the workpiece, and applying bending forces to the workpiece in the sense of deforming the workpiece to minimize the amplitude of the second signals.

REFERENCES:
patent: 3481170 (1969-12-01), Galdabini
patent: 3518868 (1970-07-01), Cargill
patent: 3808660 (1974-05-01), Wik
patent: 3951563 (1976-04-01), Ravenhall
patent: 4154073 (1979-05-01), Galdabini

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