The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 04, 1992
Filed:
Jun. 01, 1990
Bernd Onderka, Korschenbroich, DE;
Georg Engel, Kaarst, DE;
Paul Mauk, Dusseldorf, DE;
Hugo Feldmann, Alsdorf-Warden, DE;
SMS Schloemann-Siemag Aktiengesellschaft, Dusseldorf, DE;
Abstract
A workpiece is advanced through a succession of universal roll stands each having a pair of rotatably positively driven horizontal rolls engaging horizontal surfaces of the workpiece and a pair of idling vertical rolls engaging vertical surfaces of the workpiece and normally only rotationally entrained by engagement with the advancing workpiece. The roll stand is controlled by detecting the peripheral speeds of the vertical rolls and generating outputs corresponding thereto and then comparing the outputs to set points and generating error signals corresponding to the difference. The peripheral speed and position of the horizontal rolls are detected to establish same as operating characteristics. Finally the peripheral speeds of the vertical rolls are varied in accordance with the respective differences by varying at least one of the operating characteristics. Such variation is done by changing the crosswise position and/or the peripheral speed of the horizontal rolls, as the vertical/horizontal speed ratio is affected both by amount of vertical compression and amount of tension in the workpiece.