US3872285A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control system for sensing the vibration and lateral force on a cutting tool
Assignee: Westinghouse Electric Corp
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Filing: 1974-05-31
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Granted: 1975-03-18
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Expires: 1994-05-31
Abstract
Abstract A system for sensing the vibration and lateral force in a cutting tool for the purpose of keeping both these operating parameters within tolerable limits. A piezoelectric crystal is mounted in the chuck supporting the cutting tool. The mechanical stresses on the crystal produce an electrical signal which is then separated into vibration and lateral force components. The negative d.c. analog voltages of these components are summed with a positive d.c. voltage analogous to the programmed feed rate, the algebraic summation resulting in an adaptive control voltage which is used to modulate the spindle power in accordance with the ambient vibration and force.
Inventors
- 👤 Lanson Y Shum
- 👤 Leon J Sienkiewicz
- 👤 Theodore Gogniat
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:57
CPC Classifications
B; B23; B23Q; B23Q17/00; B23Q17/09; B23Q17/0904; B23Q17/0919; B23Q17/0947; B23Q11/00; B23Q11/04; B23Q15/00; B23Q17/12; G; G05; G05B; G05B2219/00; G05B2219/30; G05B2219/37; G05B2219/37351; Y; Y10; Y10T; Y10T409/00; Y10T409/30; Y10T409/304312
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
97 words
A control system for sensing the vibration and lateral force on a cutting tool supported in a chuck mounted on a machine comprising: transducer means, mounted in proximity to said cutting tool, in response to mechanical force to produce electrical signals; means coupled to said transducer means for separating said electrical signals into vibration and force component signals; means for summing said vibration and force components with a programmed feed rate reference signal to produce a summed adaptive control signal which is continuously modulated in accordance with the instantaneous vibration and force experienced by the cutting tool.
Claim 2
Dependent Claim
97 words
A control system for sensing the vibration and lateral force on a cutting tool supported in a chuck mounted on a machine comprising: transducer means, mounted in proximity to said cutting tool, in response to mechanical force to produce electrical signals; means coupled to said transducer means for separating said electrical signals into vibration and force component signals; means for summing said vibration and force components with a programmed feed rate reference signal to produce a summed adaptive control signal which is continuously modulated in accordance with the instantaneous vibration and force experienced by the cutting tool.
Claim 3
Dependent Claim
18 words
A control system according to claim 1 wherein said transducer is a piezoelectric crystal mounted in said chuck.
Claim 4
Dependent Claim
42 words
A control system according to claim 1 wherein said separating means comprises a high pass filter and a low pass filter, said high pass filter delivering a high frequency vibration signal, said low pass filter delivering a low frequency lateral force signal.
Claim 5
Dependent Claim
71 words
A control system according to claim 1 wherein said separating means comprises a high pass filter, a low pass filter, and analog conversion means, said high pass filter delivering a high frequency vibration signal, said low pass filter delivering a low frequency lateral force signal, said conversion means receiving said high frequency vibration and said low frequency lateral force signals and delivering analog vibration and force signals to said summing means.
Claim 6
Dependent Claim
160 words
A control system for sensing the vibration and lateral force on a cutting tool supported in a chuck on a machine, comprising: at least one piezoelectric crystal mounted in said chuck, said crystal in response to mechanical force producing an electrical signal; means coupled to said piezoelectric crystal comprising a high pass filter, a low pass filter and conversion means, said high pass filter receiving said electrical signal and delivering a high frequency signal which is a function of vibration, said low pass filter receiving said electrical signal and delivering a low frequency lateral force signal, said conversion means receiving said high and low frequency signals, and delivering an analog vibration signal -V and an analog force signal -F; and summing means arranged to receive a reference signal +R which is a function of the programmed feed rate, and said vibration and force signals -V, -F respectively; whereby the algebraic summation of +R, -V, -F provides an adaptive control signal.
Claim 7
Dependent Claim
160 words
A control system for sensing the vibration and lateral force on a cutting tool supported in a chuck on a machine, comprising: at least one piezoelectric crystal mounted in said chuck, said crystal in response to mechanical force producing an electrical signal; means coupled to said piezoelectric crystal comprising a high pass filter, a low pass filter and conversion means, said high pass filter receiving said electrical signal and delivering a high frequency signal which is a function of vibration, said low pass filter receiving said electrical signal and delivering a low frequency lateral force signal, said conversion means receiving said high and low frequency signals, and delivering an analog vibration signal -V and an analog force signal -F; and summing means arranged to receive a reference signal +R which is a function of the programmed feed rate, and said vibration and force signals -V, -F respectively; whereby the algebraic summation of +R, -V, -F provides an adaptive control signal.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-17 | 1978-09-16 | 1979-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-17 | 1982-09-16 | 1983-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-17 | 1986-09-16 | 1987-03-18 | $7700.00 | Window Closed / Lapsed |