Metal deforming – With use of control means energized in response to activator... – Sensing tool or tool-linked part
Patent
1991-11-04
1994-01-18
Larson, Lowell A.
Metal deforming
With use of control means energized in response to activator...
Sensing tool or tool-linked part
72237, 33657, B21B 3120, G01D 2100
Patent
active
052791394
ABSTRACT:
A method and apparatus for aligning both upper and lower horizontal rolls in a roll stand. More particularly, it relates to a roll stand having horizontal rolls with electromechanical and hydraulic adjustments of the upper roll, and electromechanical adjustment of the lower roll, as well as position sensors associated with the adjustments. The method allows for the automatic adjusting and centering or aligning of the upper and lower horizontal rolls in a such a roll stand.
The apparatus for automatically aligning and adjusting the upper and lower horizontal rolls on a roll center plane in a roll stand comprises a housing, roll adjusting devices for upper and lower roll adjustment devices, an upper roll position sensor, an upper roll housing stop surface, fixed in position with respect to a horizontal roll center plane, a balancing means for positioning the upper roll horizontally in the housing, an upper chock having a stop surface for mating with the upper roll stop surface, a lower chock, a lower chock adjustment point, having a predetermined positional relationship to a vertex of the lower roll, and a control means for controlling the roll adjusting device for the upper roll, the roll adjusting device for the lower roll, and the balancing means.
The method comprises the steps of horizontally aligning the upper roll with the balancing means against the stop surfaces on the housing, calculating the position of the upper roll, with respect to the roll center plane, clamping the horizontally aligned upper roll against the balancing means, moving the upper roll while maintaining horizontal alignment, to a distance above the roll center plane, calculating a relative position of the lower roll with respect to the roll center plane and moving the lower roll to the calculated roll center plane, placing the upper roll on the lower roll by means of the balancing means, while measuring the distance traversed, calculating the position of the upper roll, correcting the position of the lower roll according to said calculation of the position of the upper roll; and then, nullifying the parallel upper and lower rolls with a calibration pressure of the upper roll.
REFERENCES:
patent: 2054530 (1936-09-01), Williams
patent: 3358485 (1967-12-01), DeCaro et al.
patent: 3369383 (1968-02-01), Barnikel
patent: 4127997 (1978-12-01), Quehen
patent: 4312209 (1982-01-01), Hansen
patent: 5052206 (1991-10-01), Reismann et al.
Larson Lowell A.
Mannesmann Aktiengesellschaft
Schoeffler Thomas C.
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