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:
May. 14, 2002
Filed:
Mar. 21, 2000
Tohru Irie, Aichi, JP;
Masashi Ota, Aichi, JP;
Sango Co., Ltd., Nagoya, JP;
Abstract
According to the spinning processing method of the invention, a steel tube ( ) as a work is rotated round its longitudinal axis (X). A plurality of forming rollers ( ), which are arranged around the steel tube ( ), are rotated round the steel tube axis (X) in the direction (&bgr;) opposite to the direction of rotation for the steel tube ( ). The forming rollers are further moved toward the steel tube axis (X) into pressure contact with the steel tube ( ), while being moved relatively to the steel tube ( ) in the axial direction (A-B) thereof, to draw the steel tube ( ) to form a section of reduced diameter. The relative rotation of the steel tube ( ) and the forming rollers ( ) in the opposite directions (&agr;, &bgr;) increases the relative rotation speed between them and shortens the processing time.