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. 14, 2001
Filed:
Apr. 18, 2000
Johann Kleinburger, Höri, CH;
Felix Hauri, Birmenstorf, CH;
ABB Alstom Power (Schweiz) AG, Baden, CH;
Abstract
The present invention relates to an apparatus and a method for bending hard-drawn copper conductor bars for rotor windings of turbo-generators and engines. This method makes it possible to prevent heating up and accompanying transformation of hard-drawn copper into soft copper, which leads to a reduction in the stability with respect to centrifugal forces and thermal expansions. The apparatus and the method permit automatic, step-by-step bending of hard-drawn copper conductor bars, with sensing of the bending radius achieved and correction in the direction of the desired bending radius. For this purpose, initially a hard-drawn copper conductor bar is bent by means of a pair of bending cylinders to a previously set bending radius, the bending radius actually achieved is measured and a correction of the bending radius used in the next step takes place, in order to achieve an approximation to the desired bending radius.