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. 25, 2011
Filed:
Mar. 01, 2011
Yoshihiro Harada, Tokyo, JP;
Toshiaki Kashihara, Tokyo, JP;
Kensaku Kuroki, Tokyo, JP;
Yasukazu Nishimura, Tokyo, JP;
Shogo Okamoto, Tokyo, JP;
Shinji Nishimura, Tokyo, JP;
Yoshihiro Harada, Tokyo, JP;
Toshiaki Kashihara, Tokyo, JP;
Kensaku Kuroki, Tokyo, JP;
Yasukazu Nishimura, Tokyo, JP;
Shogo Okamoto, Tokyo, JP;
Shinji Nishimura, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
Respective divided segments of a collet are moved radially outward by moving an arbor axially. The respective divided segments thereby press an inner circumferential surface of a stator core of a stator from radially inside such that the stator is held coaxially by the collet. Next, shaping rollers are lowered so as to press an outer circumferential surface of the stator core. The stator is rotated by rotating the collet in that state. Thus, the inner circumferential surface of the stator core is compressed and plastically deformed so as to conform to the collet and the outer circumferential surface of the stator core is compressed and plastically deformed by the shaping rollers, correcting the inner circumferential surface and the outer circumferential surface of the stator core so as to be coaxial and so as to have a high degree of roundness.