Acoustic detection of tool break events in machine tool operatio

Details Acoustic detection of tool break events in machine tool operatio Acoustic detection of tool break events in machine tool operatio

1984-10-24

1987-01-13

Rowland, James L.

Communications: electrical

Condition responsive indicating system

Specific condition

340683, 73104, 73660, G08B 2100

Patent

active

046367799

ABSTRACT:
A system and method for monitoring vibrations of a cutting tool produced by tool break events, and for interpreting them to detect tool breaks of sufficient magnitude to endanger the machined part. The signal generated by a sensor such as an accelerometer is preprocessed to attenuate low frequency machining noise and detect the energy in a higher frequency band, then sampled, and the digitized signal samples analyzed by tool break detection logic. This logic is triggered by a positive-going signal transient, and prevents false alarms on minor tool break events that do not mar the workpiece and on noise from other sources.

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patent: 4087801 (1978-05-01), Noh
patent: 4332161 (1982-06-01), Kakino
patent: 4413507 (1983-11-01), Drew et al.
patent: 4471444 (1984-09-01), Yee et al.
patent: 4514797 (1985-04-01), Begin

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