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A direct on-line ultrasonic sensing method to determine tool and process conditions during turning operations

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dc.contributor.authorNayfeh, Taysir H.en
dc.contributor.committeechairEyada, Osama K.en
dc.contributor.committeememberFabrycky, Wolter J.en
dc.contributor.committeememberDryden, Robert D.en
dc.contributor.committeememberDuke, John C. Jr.en
dc.contributor.committeememberSarin, Subhash C.en
dc.contributor.departmentIndustrial and Systems Engineeringen
dc.date.accessioned2014-03-14T21:13:59Zen
dc.date.adate2008-06-06en
dc.date.available2014-03-14T21:13:59Zen
dc.date.issued1993en
dc.date.rdate2008-06-06en
dc.date.sdate2008-06-06en
dc.description.abstractMachining operations in automated manufacturing centers are under-performing by 20-80%. Optimizing these machining operations requires on-line knowledge about the cutting tool's condition and the process state. Currently, this information is either not reliable or not available in a timely manner. This is due to the lack of suitable sensors, which must measure on-line directly and accurately one or more of the relevant tool and process information sources in the hostile machining environment. A direct, active, ultrasonic method for on-line sensing of the tool condition and process state in turning operations was developed. Sensing is achieved by using an ultrasonic transducer operating at 10 MHz in a pulse-echo mode to send pulses through the tool. The amplitude and propagation time of the reflected pulses are modulated by the tool nose, flank, temperature, and by the material in contact with the tool. The reflected pulses are received and processed by a high speed digital signal processing system. This method has the potential to directly and accurately measure on-line several relevant processes and cutting tool parameters through the use of a single sensor. These parameters are tool-workpiece contact, tool wear, tool chipping, temperature and chatter.en
dc.description.degreePh. D.en
dc.format.extentviii, 121 leavesen
dc.format.mediumBTDen
dc.format.mimetypeapplication/pdfen
dc.identifier.otheretd-06062008-165721en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-06062008-165721/en
dc.identifier.urihttp://hdl.handle.net/10919/38347en
dc.language.isoenen
dc.publisherVirginia Techen
dc.relation.haspartLD5655.V856_1993.N393.pdfen
dc.relation.isformatofOCLC# 29021816en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.lccLD5655.V856 1993.N393en
dc.subject.lcshTools -- Testingen
dc.subject.lcshTurning (Lathe work) -- Testingen
dc.subject.lcshUltrasonic testingen
dc.titleA direct on-line ultrasonic sensing method to determine tool and process conditions during turning operationsen
dc.typeDissertationen
dc.type.dcmitypeTexten
thesis.degree.disciplineIndustrial and Systems Engineeringen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.leveldoctoralen
thesis.degree.namePh. D.en

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