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:
Feb. 05, 2002
Filed:
Sep. 08, 2000
Yoshiaki Kakino, Kyoto 606-0024, JP;
Makoto Fujishima, Yamatokoriyama, JP;
Hisashi Otsubo, Okayama, JP;
Hideo Nakagawa, Itami, JP;
Yoshinori Yamaoka, Aichi, JP;
Torao Takeshita, Tokyo, JP;
Other;
Abstract
A numerical control apparatus ( or ) comprising pecking operation controlling means ( ) which make a feed drive system ( ) retracted when a cutting load detected by cutting load detecting means ( ) exceeds a reference value during a drilling process, the cutting load detecting means ( ) comprise a bite load detecting section ( ) to detect the cutting load at a biting stage wherein a tool bites a work piece, and a stationary load detecting section ( ) to detect the cutting load after the biting stage. The numerical control apparatus ( or ) comprises pecking judgement means ( ) to judge that the feed drive system ( ) should be retracted when a fluctuation load exceeds a specified reference value wherein the fluctuation load is obtained by reducing the bite load from the detected stationary load. When it is judged that the feed drive system ( ) should be retracted, the pecking operation controlling means ( ) make the feed drive system ( ) retracted.