• Patent Title: Method for operating a roll stand for stepped rolling
  • Application No.: US17299820
    Application Date: 2019-12-02
  • Publication No.: US11701695B2
    Publication Date: 2023-07-18
  • Inventor: Jürgen Klöckner
  • Applicant: SMS group GmbH
  • Applicant Address: DE Düsseldorf
  • Assignee: SMS group GmbH
  • Current Assignee: SMS group GmbH
  • Current Assignee Address: DE Düsseldorf
  • Agency: Smartpat PLC
  • Priority: DE 2018221153.1 2018.12.06 DE 2019202237.5 2019.02.19 DE 2019215265.1 2019.10.02
  • International Application: PCT/EP2019/083331 2019.12.02
  • International Announcement: WO2020/114976A 2020.06.11
  • Date entered country: 2021-06-04
  • Main IPC: B21B37/54
  • IPC: B21B37/54 B21B39/08
Method for operating a roll stand for stepped rolling
Abstract:
A method for operating a roll stand for the stepped rolling of metal strip is described. The metal strip is initially fed into a roll stand on the infeed side, where it is step-rolled. This creates a leading and a trailing section of the metal strip, each with different thicknesses. After the roll stand, the step-rolled metal strip initially passes through an outfeed-side strip accumulator before it is wound into a coil by an upcoiler. The outfeed-side reel is controlled to a constant strip tension. To keep the outfeed-side strip tension sufficiently constant even in the case of rapid changes in the size of the roll gap and the resulting rapid changes in thickness in the rolled metal strip the control of the strip tension with the aid of the upcoiler is supplemented by a position control for a roller unit in the outfeed-side strip accumulator.
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