Measuring and testing – Vibration – Sensing apparatus
Patent
1996-04-15
1998-04-14
Chapman, John E.
Measuring and testing
Vibration
Sensing apparatus
340680, 409186, G01H 1700, B24B 4910
Patent
active
057394334
ABSTRACT:
In a first preferred embodiment a transmitting acoustic transducer mounted on the tool axis or spindle of a grinding tool affords a method for pre-contact recognition and control (touch-off) independent of tool grit, workpiece material, and all natural machining frequencies. The transmitting transducer such as a piezoelectric polymer or crystal generates a selected frequency of approximately 1-5 MHz. As the tool enters a lubricating plume surrounding the workpiece, the ultrasonic transmission couples through the fluid interface to the workpiece. A receiving transducer mounted on the optical workpiece gives a unequivocal and rapid detection of the transmission by a highly filtered(band pass) receiving transducer before the tool contacts the workpiece. In a second preferred embodiment, a photoacoustic laser excites a modulated frequency to the grinding tool and to the receiving transducer. Alternatively, the resonant frequency (approximately 300 KHz) of the grinding tool can be detected by the receiving transducer.
REFERENCES:
patent: 3713127 (1973-01-01), Keledy et al.
patent: 4011472 (1977-03-01), Feng
patent: 4144767 (1979-03-01), Kaule et al.
patent: 4563897 (1986-01-01), Moore
patent: 4574633 (1986-03-01), Ohnuki et al.
patent: 4636780 (1987-01-01), Thomas et al.
patent: 4893742 (1990-01-01), Bullock
patent: 4922754 (1990-05-01), Horne et al.
patent: 5196006 (1993-03-01), Klopotek et al.
patent: 5218258 (1993-06-01), Shirasu et al.
patent: 5414510 (1995-05-01), Schultz et al.
patent: 5418804 (1995-05-01), Zhiglinsky et al.
Webster et al., "Acoustic Emission for Process Control and Monitoring of Surface Integrity during Grinding", Annals of the CIRP, vol. 43, Jan. 15, 1994, pp. 299-304.
Jenab et al., "An Active Vibration Cancellation Strategy for the OPTICAM SX", Center for Optics Manufacturing, Univ. Rochester, presented at OPTIFAB '94, Oct. 17, 1994, pp. 2-24.
Chapman John E.
Steinberger Brian S.
University of Central Florida
LandOfFree
Touch off probe does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Touch off probe, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Touch off probe will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-636792