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:
Sep. 07, 1993
Filed:
Mar. 26, 1991
NTN Corporation, Osaka, JP;
Abstract
A tool abnormality detecting device for a machine tool for machining a work with a machining tool selected according to a machining program. The device has a machining load detector for detecting a load during machining with a machining tool. A memory is provided to store threshold data for judging a tool life, detection starting time data and detection time data for each machining stage carried out with respective machining tools. Further the device is provided with a comparison/judgement unit for judging abnormality of the tool by taking detection data corresponding to the machining tool from the memory and comparing an output value of the machining load detector with a threshold within a detection time set in the detection data.