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. 17, 2001
Filed:
Mar. 27, 1998
Toshio Ohnishi, Aichi, JP;
Masahiro Kagawa, Aichi, JP;
Yoshnori Sugie, Tokyo, JP;
Koji Sugano, Aichi, JP;
Nobuki Tanaka, Aichi, JP;
Kingo Sawada, Aichi, JP;
Masao Shoji, Aichi, JP;
Takaaki Toyooka, Aichi, JP;
Yuji Hashimoto, Aichi, JP;
Motoaki Itadani, Aichi, JP;
Akira Yorifuji, Aichi, JP;
Masanori Nishimori, Aichi, JP;
Kawasaki Steel Corporation, Hyogo, JP;
Abstract
A method and apparatus for smoothing a thick walled portion of a steel pipe produced by pressure-welding two opposite longitudinal edges of an open pipe with a squeeze roll after being subjected to induction heating. Outer and inner reduction rollers pressure sandwiches the thick walled portion from the outer and inner surfaces of the pipe, a support supports the inner reduction roller to be rotatable and containing a water passage for cooling water, a connecting rod connects the support device to a coupler and contains a further water passage for feeding cooling water to the water passage, and an anchor holds the connecting rod. In the a method of producing steel pipes two opposite longitudinal edges of the open pipe are preformed before being subjected to the induction heating and thereafter a thick walled portion is smoothed by the above-described apparatus.