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. 22, 2003
Filed:
Jan. 29, 2001
Yoshiaki Kakino, Kyoto-shi, Kyoto 606-0024, JP;
Makoto Fujishima, Yamatokoriyama-shi, Nara-ken 639-1160, JP;
Hisashi Otsubo, Asakuchi-gun, Okayama-ken 719-0303, JP;
Hideo Nakagawa, Itami-shi, Hyogo-ken 664-0831, JP;
Torao Takeshita, Higashi-ku, Nagoya-shi, Aichi-ken 461-8670, JP;
Yoshinori Yamaoka, Niwa-gun, Aichi-ken 480-0197, JP;
Other;
Abstract
A CNC tapping machine includes a spindle to which a tap is attached and a spindle motor for rotating the spindle. The load torque acting on the spindle motor that is detected when performing a tapping procedure without a workpiece is stored in a memory as referential, torque data. During a tapping procedure, a detection device detects the load torque acting on the spindle motor. A computer computes the difference between the load torque defected by the detection device and the referential load torque and uses the difference as the cutting load acting on the tap. As a result, the cutting load torque acting on the tap is accurately detected.