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:
Mar. 02, 2010
Filed:
Aug. 28, 2002
Rolf Bünten, Aachen, DE;
Rainer Effertz, Düsseldorf, DE;
Rolf Bünten, Aachen, DE;
Rainer Effertz, Düsseldorf, DE;
SMS Siemag Aktiengesellschaft, Düsseldorf, DE;
Abstract
The invention relates to a method for cold-rolling strips consisting of, inter alia, special steels and/or nonferrous metals, in a multi-stand tandem rolling mill. The first stand(s) carry out comparatively high reductions and the last stand(s) determine the surface quality of the strip, with a relatively low reduction. The aim of the invention is to improve the capacity of the tandem rolling mill in terms of thickness reduction and in terms of the surface quality of the rolled strips. To this end, an emulsion is used as a coolant and lubricant for the first passages of the strip through the tandem rolling mill with relatively high reduction. The adhesive coolant and lubricant film is then squeezed off the strip following removal from the roll gap of the last emulsion-operated stand. Rolling oil is used as a lubricant for especially the last passage(s) through the tandem rolling mill with relatively low reduction. The invention also relates to an installation for carrying out the inventive method.