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:
Oct. 07, 2014
Filed:
Sep. 24, 2012
Daisuke Nikkuni, Osaka, JP;
Suguhiro Fukushima, Osaka, JP;
Yoshiro Washikita, Osaka, JP;
Tetsuo Kajihara, Tokyo, JP;
Kenji Horii, Hiroshima, JP;
Taro Sato, Hiroshima, JP;
Daisuke Nikkuni, Osaka, JP;
Suguhiro Fukushima, Osaka, JP;
Yoshiro Washikita, Osaka, JP;
Tetsuo Kajihara, Tokyo, JP;
Kenji Horii, Hiroshima, JP;
Taro Sato, Hiroshima, JP;
Nippon Steel & Sumitomo Metal Corporation, Tokyo, JP;
Mitsubishi-Hitachi Metals Machinery, Inc., Tokyo, JP;
Abstract
Provided is a method of controlling operation of a tandem rolling mill which enables large reduction rolling in the latter-stage stand of the tandem rolling mill necessary for manufacturing fine-grained steel, and so on. The method comprises: a step of determining a first exit-side sheet thickness in rolling a constant portion of a material to be rolled; and a step of determining a second exit-side sheet thickness in rolling a front end portion of the material, such that a pre-tightening load becomes a set value or less; the material is rolled into the second exit-side sheet thickness, until the front end portion is fed into the stands; the constant portion is rolled by the stand given a pre-tightening load into the first exit-side sheet thickness; and the second exit-side sheet thicknesses of the stands given the pre-tightening load are made larger than the first exit-side sheet thickness.