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:
Jun. 20, 2006
Filed:
Jun. 10, 2004
Noriyasu Hayashi, Niwa gun, JP;
Yukiyasu Tanaka, Niwa gun, JP;
Masashi Isaji, Niwa gun, JP;
Yukio Morita, Niwa gun, JP;
Haruhiko Koike, Niwa gun, JP;
Kazuki Uemura, Niwa gun, JP;
Noriyasu Hayashi, Niwa gun, JP;
Yukiyasu Tanaka, Niwa gun, JP;
Masashi Isaji, Niwa gun, JP;
Yukio Morita, Niwa gun, JP;
Haruhiko Koike, Niwa gun, JP;
Kazuki Uemura, Niwa gun, JP;
Yamazaki Mazak Corporation, Aich Pref., JP;
Abstract
The object of the invention is to provide an inverted vertical lathe comprising a device for replacing collets automatically, and having a detector for detecting that the collet has been gripped correctly. A chuckmounted on a headstockgrips a colletin a replaceable manner via a tapered boreprovided to the end thereof. A collet end face eccentricity detectorcomprises a detecting member (sensor)fixed to the end of an arm. The detecting memberdetects the eccentricity of the end faceof the colletin a contactless manner. A variation pattern of the eccentricity occurring when each colletis gripped correctly by the chuckon the main spindle is detected in advance, and this pattern is compared with the variation pattern of the eccentricity detected by the present detection, and thus, whether or not the collet has been gripped correctly is detected.