DEFECT PREDICTING DEVICE FOR CUTTING TOOL AND METHOD THEREOF

PURPOSE: To predict the life of a cutting tool and contribute to the early exchange of an abnormal cutting tool by providing a resistance value change extracting means extracting change of a contact resistance value from the contact resistance values before and after the use of the cutting tool, com...

Full description

Saved in:
Bibliographic Details
Main Authors TAKAGI HIROMASA, UEHARA KUNIO
Format Patent
LanguageEnglish
Published 27.08.1996
Edition6
Subjects
COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOTDIRECTED TO A PARTICULAR RESULT
DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g.ARRANGEMENTS FOR COPYING OR CONTROLLING
MACHINE TOOLS
MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OFPARTICULAR DETAILS OR COMPONENTS
MEASURING
MEASURING ANGLES
MEASURING AREAS
MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS
METAL-WORKING NOT OTHERWISE PROVIDED FOR
PERFORMING OPERATIONS
PHYSICS
TESTING
TRANSPORTING
Online AccessGet full text

Cover

More Information
Summary:PURPOSE: To predict the life of a cutting tool and contribute to the early exchange of an abnormal cutting tool by providing a resistance value change extracting means extracting change of a contact resistance value from the contact resistance values before and after the use of the cutting tool, comparing this change of resistance value with a deterioration reference pattern, and predicting the defect time of the tool. CONSTITUTION: Constant-current is let flow by a constant-current generating circuit 12, voltage between both contacts 4, 5 is measured by a terminal voltage measuring circuit 14, and this voltage is input to a computation judging circuit 11 through an A/D conversion circuit 15. This input is converted to a resistance value by a resistance value computing means, after judging by a range judging means of the computation judging circuit 11. Next, in the case of after n-th time cutting cycle in a resistance value change extracting means, the resistance value is stored as the resistance value of n-th time. In addition to this, the resistance value of n-th time is campared with one o (n-1)th time. and the change of the resistance value is extracted. A prediction detecting means discriminates whether the change quantity of the resistance value is in the allowable range or not, so as to predict the defect time of a bite tip.
Bibliography:Application Number: JP19950043494