Groove cutting tool break event detecting method and system

Details Groove cutting tool break event detecting method and system Groove cutting tool break event detecting method and system

1988-01-12

1989-08-01

Orsino, Joseph A.

Communications: electrical

Condition responsive indicating system

Specific condition

340683, 73104, 73660, G08B 2100

Patent

active

048536806

ABSTRACT:
Vibrations at the groove cutting tool-workpiece interface are sensed by a vibration sensor such as, for example, an accelerometer, and the vibration sensor output is processed to yield an electrical signal indicative of groove cutting tool cutting noise vibration. Digital analysis of the electrical signal after it is sampled is performed to detect various types of groove cutting tool break event signatures, and especially a type of signature in which a high amplitude positive going spike is followed by a significant shift in the mean amplitude signal level of the background cutting vibration. A machine tool monitor, system and method are disclsoed which detects such changes and interprets them to detect groove tool break events of sufficient magnitude to endanger the machined part.

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"Automatic Tool Touch and Breakage Detection in Turning", S. R. Hayashi et al, General Electric Company, Technical Information Series, No. 85 CRD 097, pp. 1-11 (Jun. 1985).

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