Apparatus for judging the useful life of tools

Details Apparatus for judging the useful life of tools Apparatus for judging the useful life of tools

1976-07-26

1978-05-23

Ciarlante, Anthony V.

Measuring and testing

Surface and cutting edge testing

G01N 1900

Patent

active

040904032

ABSTRACT:
The apparatus comprises a drill power meter for producing an electric signal representing the drilling resistance of a workpiece, a filter for shaping the waveform of the electric signal, an integrator for integrating the output of the filter, a comparator for comparing the output from the integrator with a reference signal for producing a pulse when the former is larger than the latter, a first counter for counting the pulse, a second counter for counting the total number of measurements of the drilling resistance of the workpiece performed by the drill power meter, and means for comparing the counts of the first and second counters for judging the useful life of the drill.

REFERENCES:
patent: 3299697 (1967-01-01), Sparling
patent: 3809870 (1974-05-01), Auble et al.
patent: 3834615 (1974-09-01), Watanabe et al.
patent: 3841149 (1974-10-01), Edwin et al.

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