Metal deforming – Process – 'rolling'
Patent
1985-12-02
1988-02-23
Larson, Lowell A.
Metal deforming
Process
'rolling'
72 8, 72 11, 72 16, 72 17, 72243, 72247, 364472, B21B 3700, B21B 3116
Patent
active
047262133
ABSTRACT:
A shape controlling method for controlling the shape of a sheet rolled in a rolling mill, with the shape pattern of the sheet being approximated by a formula of an order of a large number, in accordance with the detected shape signals. Asymmetrical fundamental component (component of the first order) is extracted from the approximating formula. The control with respect to the fundamental component is allotted to the rolling reduction function, while the controls relative to the higher order asymmetrical components are conducted by other final control element than the rolling reduction function. The asymmetrical fundamental component causes winding of the sheet during rolling. By controlling the fundamental component separately from other components, it is possible to improve the shape of the rolled product while avoiding winding of the product under rolling operation.
REFERENCES:
patent: 4320643 (1982-03-01), Yasuda et al.
patent: 4512170 (1985-04-01), Hsu
patent: 4587819 (1986-05-01), Hausen
"Analysis of Shape and Discussion of Problems of Scheduling Set-Up and Shape Control", P. D. Spooner et al, Publ. Met. Soc., 1976, pp. 19-29.
Hitachi , Ltd.
Katz Steve
Larson Lowell A.
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