Tool break/wear detection using a tracking minimum of detected v

Details Tool break/wear detection using a tracking minimum of detected v Tool break/wear detection using a tracking minimum of detected v

1988-10-04

1990-01-16

Orsino, Joseph A.

Communications: electrical

Condition responsive indicating system

Specific condition

73104, 73660, 340683, G08B 2100

Patent

active

048946443

ABSTRACT:
Gradual wear or breakage of a machine tool which occurs over a period of time is detected by sensing high frequency vibrations produced at the cutting tool/workpiece interface during a machining process. The high frequency vibrations are converted to a unipolar vibration signal which is processed to produce a tracking signal which tracks the minimum value of the vibration signal. The vibration signal is related to the effective cutting energy and it decreases due to gradual tool wear or breakage. The tracking minimum signal is compared to a predetermined threshold level to detect excessive wear or breakage of the tool, and an alarm is provided.

REFERENCES:
patent: 4636780 (1987-01-01), Thomas et al.
patent: 4642617 (1987-02-01), Thomas et al.
patent: 4707688 (1987-11-01), Thomas
patent: 4724524 (1988-02-01), Thomas et al.
patent: 4764760 (1988-08-01), Bedard et al.

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