EP 0532560 B1 19940413 - PROCESS FOR THE PRODUCTION OF LOW-RESIDUAL-STRESS ROLLED STRIP.
Title (en)
PROCESS FOR THE PRODUCTION OF LOW-RESIDUAL-STRESS ROLLED STRIP.
Title (de)
VERFAHREN ZUR ERZEUGUNG VON EIGENSPANNUNGSARMEM BAND BEIM WALZEN.
Title (fr)
PROCEDE DE FABRICATION D'UN FEUILLARD A FAIBLE CONTRAINTE INTERNE PAR LAMINAGE.
Publication
Application
Priority
- DD 34128290 A 19900605
- DE 9100484 W 19910605
Abstract (en)
[origin: WO9118688A1] The invention concerns the production of low-residual-stress strip and is applicable to the metal-forming field. The invention proposes that, during rolling, the gap between the finishing rolls is adjusted in n strip elements by adjustment means by an amount DELTA Si, although the number n of measurement zones does not necessarily have to be equal to the number of adjustment zones. The adjustment amounts DELTA Si for the individual strip elements, including the no-slip point, are continuously determined by determining, before or at the beginning of the roll pass, the mean pass reduction epsilon &cir& NOt h,ges and the reduction value epsilon &cir& NOt h,k characteristic of the reduction from the no-slip point to the exit side of the roll gap. The quotient of these two parameters, epsilon &cir& NOt h,ges/ epsilon &cir& NOt h,k, gives, following multiplicative combination with the final thickness h1, a constant quantity valid for the particular roll pass. Multiplicative combination of this constant quantity with the instantaneous strip elongation or contraction values DELTA epsilon l,i, obtained for the particular strip element i from the stress measurement device gives the adjustment amounts DELTA Si necessary for control of the fine adjustment of the roll gap contour by the adjustment means.
IPC 1-7
IPC 8 full level
B21B 37/28 (2006.01)
CPC (source: EP US)
B21B 37/28 (2013.01 - EP US)
Citation (examination)
- NEUE HüTTE, vol. 20, issue 4, April 1975, (Berlin, DE9, E. KöPSTEIN et al.: "über die örticliche Breitung beim Kaltwalzen breiter Bänder", pages 226-228
- NEUE HüTTE, vol. 26, issue 3, March 1981, (Berlin, DE9, A: KNAUSCHNER : "Ein Berechnungsverfahren für den mittleren Umformwiderstand Kwm beim Flachwalzen", pages 94-99.
Designated contracting state (EPC)
BE DE FR LU NL
DOCDB simple family (publication)
WO 9118688 A1 19911212; AU 7972891 A 19911231; DD 294883 A5 19911017; DE 59101395 D1 19940519; EP 0532560 A1 19930324; EP 0532560 B1 19940413; US 5365761 A 19941122
DOCDB simple family (application)
DE 9100484 W 19910605; AU 7972891 A 19910605; DD 34128290 A 19900605; DE 59101395 T 19910605; EP 91910160 A 19910605; US 96045693 A 19930205