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:
Apr. 06, 1982
Filed:
Dec. 11, 1979
Hermann Moltner, Dusseldorf, DE;
Wolfgang Siebenborn, Dormagen, DE;
Kocks Technik GmbH & Co., Dusseldorf, DE;
Abstract
An adjustment device is provided for regulating the total degree of drawing in a multi-stand stretch reduction rolling mill for the stretch reduction of tube having a digital unit which calculates intermittently the desired or theoretical stretchings (.lambda. theor.) from the entering and exiting wall thicknesses (S.sub.o, S) and the external diameters (D.sub.o,D) of both the actual entering and desired finished tube sections and continuously the actual stretchings (.lambda. act.) from the entrance and exit speeds (V.sub.o,V) of the tube, and a regulator adjusting the roll r.p.m.'s as a function of the differences in theoretical and actual stretchings (.DELTA..lambda.).