Method of monitoring a cutting tool by recognizing a sensed deviation in a mathematically smoothed function of force
AssigneeEaton Corporation
InventorsStanley K. Smith, Donald J. Rozsi, Alvin M. Sabroff
Life of this patent
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Abstract
A method of monitoring the performance of a cutting tool which moves relative to a workpiece through a cycle includes the steps of dividing the cycle into a plurality of increments, sensing a function of force applied to the tool during the increments, mathematically smoothing the function of force sensed during the increments, and establishing a trend in the mathematically smoothed function of force for the plurality of increments. The mathematically smoothed function of force is compared with the established trend and if the mathematically smoothed function of force deviates substantially from the established trend a first signal is generated.
Claims27
A method of monitoring the performance of a tool which moves relative to a workpiece through a cycle comprising the steps of:
- dividing said cycle into a plurality of increments;
- sensing a function of the force applied to said tool during a plurality of said increments of said cycle;
- mathematically smoothing said function of force sensed during said plurality of sensed increments of said cycle;
- establishing a trend in the mathematically smoothed function of force for said plurality of sensed increments of said cycle;
- determining whether the mathematically smoothed function of force for subsequently sensed increments of said cycle deviates substantially from the established trend in the mathematically smoothed function of force for previously sensed increments of said cycle;
- and
- generating a first signal in response to sensing a substantial deviation in the mathematically smoothed function of force for subsequently sensed increments of said cycle from the established trend in the mathematically smoothed function of force for previously sensed increments of such cycle.
A method of monitoring the performance of a tool which moves relative to a workpiece through a cycle comprising the steps of:
- dividing said cycle into a plurality of increments;
- sensing a function of the force applied to said tool during a plurality of said increments of said cycle;
- mathematically smoothing said function of force sensed during said plurality of sensed increments of said cycle;
- establishing a trend in the mathematically smoothed function of force for said plurality of sensed increments of said cycle;
- determining whether the mathematically smoothed function of force for subsequently sensed increments of said cycle deviates substantially from the established trend in the mathematically smoothed function of force for previously sensed increments of said cycle;
- and
- generating a first signal in response to sensing a substantial deviation in the mathematically smoothed function of force for subsequently sensed increments of said cycle from the established trend in the mathematically smoothed function of force for previously sensed increments of said cycle;
- wherein said step of mathematically smoothing said function of force includes the steps of determining the cumulative percentage deviation for the function of force during each sensed increment of said cycle;
- and
- determining a cumulative percentage deviation data point for each sensed individual increment.
Dependencies are inferred from the claim text.