Apparatus and method for tool break and wear detection

Details Apparatus and method for tool break and wear detection Apparatus and method for tool break and wear detection

1989-09-05

1990-07-17

Swann, III, Glen R.

Communications: electrical

Condition responsive indicating system

Specific condition

73660, 340680, G08B 2100

Patent

active

049423878

ABSTRACT:
A device for determining cutting tool wear and breakage has an accelerometer for sensing tool vibrations. Functions of the AC and DC power of the vibration signal, such as the powers themselves or the square root of the powers, are computed and compared. If the relationship between the AC and DC power changes beyond selected limits, an alarm is sounded or flashed. A method for determining cutting tool wear and breakage provides a tool vibration signal, computes functions of the AC and DC power of the vibration signal, and compares the AC and DC power signals.

REFERENCES:
patent: 4636779 (1987-01-01), Thomas et al.
patent: 4636780 (1987-01-01), Thomas et al.
patent: 4642617 (1987-02-01), Thomas et al.
patent: 4831365 (1989-05-01), Thomas et al.
patent: 4849741 (1989-07-01), Thomas

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