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. 30, 2012
Filed:
Nov. 09, 2006
Kazuhito Kenmochi, Tokyo, JP;
Takatoshi Okabe, Tokyo, JP;
Hiroyasu Yokoyama, Tokyo, JP;
Hiroyuki Shirosawa, Tokyo, JP;
Tetsuro Sawaki, Tokyo, JP;
Yuji Sugimoto, Tokyo, JP;
Tomohiro Inoue, Tokyo, JP;
Tatsuo Koide, Tokyo, JP;
Kazuhito Kenmochi, Tokyo, JP;
Takatoshi Okabe, Tokyo, JP;
Hiroyasu Yokoyama, Tokyo, JP;
Hiroyuki Shirosawa, Tokyo, JP;
Tetsuro Sawaki, Tokyo, JP;
Yuji Sugimoto, Tokyo, JP;
Tomohiro Inoue, Tokyo, JP;
Tatsuo Koide, Tokyo, JP;
JFE Steel Corporation, , JP;
Abstract
Manufacturing equipment of electric resistance welding pipes having excellent characterization of welded seams, includes an apparatus that supplies a strip, an apparatus that reforms a shape, an apparatus that performs roll forming, an induction heater, and a contacting apparatus of strip edges by pressing, and having a finpass forming apparatus incorporating a fin having at least two stages of tapering in a middle portion of the roll forming, wherein tapering of the strip immediately before electric resistance welding is conducted such that an angle from a surface of a strip edge toward a vertical direction is in a range of 25 degrees to 50 degrees, and length of a perpendicular angle from a starting position to an end position of the tapering at one side is 20% to 45% of strip thickness, and by shaping the tapering with a fin, having at least two stages of tapering, incorporated in a finpass forming end stand.