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:
Aug. 15, 1978
Filed:
Jan. 17, 1977
Samon Yanagimoto, Kitakyushu, JP;
Minoru Kawaharada, Kitakyushu, JP;
Shuji Nagata, Kitakyushu, JP;
Fujimasa Koyama, Kitakyushu, JP;
Nippon Steel Corporation, Kitakyushu, JP;
Abstract
In the rolling of metallic material by using a rolling mill having a working roll for each surface of the workpiece reduced and having the shafts fixed with respect to movement in the direction of travel of the workpiece, the workpiece is rolled at such a high reduction rate in cross-sectional area that the contact angle .theta. between the working roll and the workpiece can have a value of .gtoreq. tan.sup.-1 .mu. (.mu. being the coefficient of friction between the working roll and the workpiece), and the rolling operation is carried out by pushing the workpiece between the working rolls, so that a neutral point of relative movements between the rods and the workpiece wire remain within the surface along which the working roll and the workpiece contact each other. The rolling apparatus has a device to push the workpiece between the working rolls and a rolling mill or rolling mills of high reduction capacity to roll the thus pushed workpiece at a high reduction rate of the cross-sectional area, whereby there can be rolled strip, bar, wire rod shape, beam blank or the like in a limited number of passes.