Metal deforming – With use of control means energized in response to activator... – Metal deforming by use of roller or roller-like tool element
Patent
1989-11-29
1991-03-12
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
72 14, 72 16, 72205, B21B 3706
Patent
active
049984276
ABSTRACT:
A method for making delivery gauge corrections at low mill speeds during threading and tailing out of a workpiece by varying the interstand tension of the workpiece. The tension between the last two stands is used with a desired tension and the delivery AGC by tension mode of an existing delivery automatic gauge control (AGC) to change the speed of the downstream stands. During the threading and tailing out phases, the delivery AGC by speed is turned off and set to zero. In the full run phase, the interstand regulators are changed to a tension by roll gap mode, and an existing delivery automatic gauge control (AGC) by speed is used to provide a stand speed reference for the downstream stands. In the full run phase, the delivery (AGC) by tension is turned off an set to zero. In the tailing out phase optionally, the tension between each stand is used in a similar manner to provide a speed reference change for each stand immediately downstream from where a tension controller is located.
REFERENCES:
patent: 3507134 (1970-04-01), Silva
patent: 3740983 (1973-06-01), Peterson et al.
patent: 3765203 (1973-10-01), Peterson
patent: 3768286 (1973-10-01), Peterson
patent: 3782151 (1974-01-01), Peterson et al.
patent: 3848443 (1974-11-01), Peterson et al.
patent: 4011743 (1977-03-01), Peterson et al.
patent: 4016735 (1977-04-01), Peterson
patent: 4286447 (1981-09-01), Peterson
Hitachi Review, vol. 28, No. 5, 1979, pp. 245-249, Kitao et al., "Advance Gage Control System in Cold Tandem Mills".
Larsen John A.
Peterson Robert S.
AEG Westinghouse Industrial Automation Corporation
Kikel Suzanne
Larson Lowell A.
Schoeffler T. C.
Westerhoff Richard V.
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