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Material removal rate prediction for ultrasonic drilling of hard materials using an impact oscillator approach

Identifieur interne : 002179 ( Istex/Corpus ); précédent : 002178; suivant : 002180

Material removal rate prediction for ultrasonic drilling of hard materials using an impact oscillator approach

Auteurs : M. Wiercigroch ; R. D. Neilson ; M. A. Player

Source :

RBID : ISTEX:9122D57537AAF69A0A4F4588C0718CFA4C2B14AF

English descriptors

Abstract

Abstract: It is postulated that the main mechanism of the enhancement of material removal rate (MRR) in ultrasonic machining is associated with high amplitudes forces generated by impacts, which act on the workpiece and help to develop micro-cracking in the cutting zone. The inherent non-linearity of the discontinuous impact process is modelled, to generate the pattern of the impact forces. A novel procedure for calculating the MRR is proposed, which for the first time explains the experimentally observed fall in MRR at higher static forces.

Url:
DOI: 10.1016/S0375-9601(99)00416-8

Links to Exploration step

ISTEX:9122D57537AAF69A0A4F4588C0718CFA4C2B14AF

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<affiliation>Department of Engineering, King's College, University of Aberdeen, Aberdeen, AB24 3UE, UK</affiliation>
<description>Corresponding author. Tel. +44-1-224-272509, fax +44-1224-272497, e-mail: M.Wiercigroch@eng.abdn.ac.uk</description>
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<namePart type="given">R.D.</namePart>
<namePart type="family">Neilson</namePart>
<affiliation>Department of Engineering, King's College, University of Aberdeen, Aberdeen, AB24 3UE, UK</affiliation>
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<affiliation>Department of Engineering, King's College, University of Aberdeen, Aberdeen, AB24 3UE, UK</affiliation>
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<abstract lang="en">Abstract: It is postulated that the main mechanism of the enhancement of material removal rate (MRR) in ultrasonic machining is associated with high amplitudes forces generated by impacts, which act on the workpiece and help to develop micro-cracking in the cutting zone. The inherent non-linearity of the discontinuous impact process is modelled, to generate the pattern of the impact forces. A novel procedure for calculating the MRR is proposed, which for the first time explains the experimentally observed fall in MRR at higher static forces.</abstract>
<note>Communicated by A.P. Fordy</note>
<note type="content">Fig. 1: Schematic of rotary ultrasonic machining. 1 - piezo-electric element, 2 - transducer assembly, 3 - coupler, 4 - diamond impregnated/coated tool, 5 - workpiece, 6 - fixture, 7 - pump, 8 - tank, 9 - coolant jet.</note>
<note type="content">Fig. 2: A dynamic model of rotary ultrasonic drilling.</note>
<note type="content">Fig. 3: Time history of (a) the tool displacement and (b) the impact force.</note>
<note type="content">Fig. 4: Influence of the static hydraulic force fHYD on the time history of the impacting force for (a) fHYD=0.1, (b) fHYD=0.4 and (c) fHYD=0.8.</note>
<note type="content">Fig. 5: The material removal rate versus static force.</note>
<subject>
<genre>Keywords</genre>
<topic>Ultrasonics</topic>
<topic>Impact oscillator</topic>
<topic>Machining</topic>
</subject>
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<title>Physics Letters A</title>
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<identifier type="ISSN">0375-9601</identifier>
<identifier type="PII">S0375-9601(00)X0238-1</identifier>
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<date>1999</date>
<detail type="volume">
<number>259</number>
<caption>vol.</caption>
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<number>2</number>
<caption>no.</caption>
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<identifier type="DOI">10.1016/S0375-9601(99)00416-8</identifier>
<identifier type="PII">S0375-9601(99)00416-8</identifier>
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