Acoustic detection of tool break events in machine tool operations
US4636779A · kind A · utility
28Cited by
7References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 24, 1984 |
| Grant date | Jan 13, 1987 |
| Priority date | — |
| Expiry date | Oct 24, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B2219/37351
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.