Metal deforming – With use of control means energized in response to activator... – Metal deforming by use of roller or roller-like tool element
Reexamination Certificate
2005-01-14
2008-11-04
Suhol, Dmitry (Department: 3725)
Metal deforming
With use of control means energized in response to activator...
Metal deforming by use of roller or roller-like tool element
C072S008500, C072S009200, C072S010700, C700S148000, C700S028000, C700S108000
Reexamination Certificate
active
07444847
ABSTRACT:
The invention relates to a method for increasing the process stability, particularly the absolute thickness precision and the installation safety during the hot rolling of steel of nonferrous materials, with small degrees of deformation (f) or no reductions while taking the high-temperature limit of elasticity (Re) into account when calculating the set rolling force (Fw) and the respective setting position (s). The process stability can be increased with regard to the precision of the yield stress (kf,R) and the set rolling force (Fw) at small degrees of deformation (f) or small reductions, during which the high temperature limit of elasticity (Re) is determined according to the deformation temperature (T) and/or the deformation speed (phip) and is integrated into the function of the yield stress (kf) for determining the set rolling force (Fw) via the relation (2) Re=a+eb1+b2·T.phipc, in which: Rerepresents the high temperature; phip represents the deformation speed, and; a, b, c represent coefficients.
REFERENCES:
patent: 93/11886 (1993-06-01), None
patent: 99/02282 (1999-01-01), None
“Modellierung des Einflusses der chemischen Zusammensetzung auf die Fliessspannung von Stählen”, M. Spittel & T. Spittel, 1996, pp. 9/1-9/25.
“Kraft- und Arbeitsbedarf bildsamer Formgebungs- verfahren”, A. Hensel & T. Spittel, 1978, pp. 85, 88 and 95.
Blei Holger
Borowikow Alexander
Grimm Wolfgang
Lixfeld Peter
Skoda-Dopp Ulrich
Kueffner Friedrich
SMS Demag AG
Suhol Dmitry
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