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  • 1
    Electronic Resource
    Electronic Resource
    Modeling of Material Removal Rate in Two-Dimensional Ultrasonic Grinding Complex Ceramics (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 359-360 (Nov. 2007), p. 431-435 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Based on the machining pattern, mechanics of material removal and theory ofmicro-indentation, in previous studies the models of material removal rate of hard-brittle materialswas discussed through the relatively influencing factors of machining parameters from variousaspects, reflecting the research advances on mechanics of material removal of hard-brittle materials.However, those models of material removal rate have limitations, which results from impercipienttheory of fracture of new kinks of materials, randomicity of practical machining process,inappropriate assumptions and simplification of the machining conditions and so on. In this workfirstly, previous models of material removal rate of hard-brittle materials machining with ultrasonicassistance were reviewed briefly. Subsequently, the models of material removal rate of complexceramics machining with two-dimensional ultrasonic vibration assistance were established based onfracture theory of micro- indentation in fracture regime and plastic removal mechanics in ductileregime respectively. The material removal rate is affected not only by the properties of material andmachining parameters, but also by the character of grinding wheel and parameters of ultrasonicvibration
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/55/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.359-360.431.pdf
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  • 2
    Electronic Resource
    Electronic Resource
    Material Removal Rate Characteristics in Ultrasonic Aided Lapping of Engineering Ceramics Based on Single-Point Scratch (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 375-376 (Mar. 2008), p. 263-267 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: A new ultrasonic aided lapping technology was developed by combining lapping technology andultrasonic machining technology. The appended special tangential ultrasonic vibration changes the materialremoval rate (MRR) characteristics. In order to clarify the influence of ultrasonic vibration, in this paper, theMRR models in ultrasonic aided single-point scratch were deduced based on indentation fracture theory.Through contrast scratching and lapping experiments, the MRR characteristics in ultrasonic aided lapping ofengineering ceramics were presented. Research result shows that the MMR in ultrasonic aided lapping islarger than that in conventional lapping under the same conditions; with the increase of ultrasonic generatorpower and lapping pressure, the MMR in lapping increases correspondingly
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/57/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.375-376.263.pdf
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  • 3
    Electronic Resource
    Electronic Resource
    Experiment Research on Temperature Field in Ultrasonic Assisted Grinding Engineering Ceramics (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 364-366 (Dec. 2007), p. 728-732 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: As one of the key factors grinding heat has a significant effect on the ground surfacequality in grinding engineering ceramics using diamond grinding wheel. Differences betweenmechanical and physical performances of ceramic materials and grinding parameters haveimportant influences on the surface temperature distribution. In the present research, experimentswith/without ultrasonic assistance were carried out to study the temperature characteristics in thegrinding field by thermocouple in grinding ZrO2 and Al2O3 engineering ceramics respectively.Moreover, the theoretical analysis and the experiment confirmation for the relationship betweengrinding parameters and temperature have been discussed. The results show that the further the heatsource keeps against grinding surface, the lower the peak value of temperature, and the surfacetemperature increases with the grinding depth, grinding speed and work table speed. According tothe results of orthogonal experiments on grinding parameters, the grinding depth is the mostimportant factor affecting the grinding temperature on the workpiece surface
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/56/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.364-366.728.pdf
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  • 4
    Electronic Resource
    Electronic Resource
    Influences of Ultrasonic Assistance in High Speed Lapping of Nano ZTA Engineering Ceramic on the Surface Machining Quality (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 359-360 (Nov. 2007), p. 355-359 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Ultrasonic aided high speed lapping with solid abrasive material was put forward aimed at theprecision finishing of nano ZTA engineering ceramic. Through theoretical analysis and contrast lappingexperiments, the influences of ultrasonic assistance on the surface machining quality were clarified. Researchresults show that the maximum undeformed chip thickness in ultrasonic aided lapping is smaller than that inconventional lapping under the same conditions; ultrasonic assistance is beneficial to enlarging the range ofductile lapping regime and improving the surface quality of nano ZTA ceramic; with the application ofultrasonic vibration, smaller surface roughness and more regular surface profile can be obtained
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/55/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.359-360.355.pdf
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  • 5
    Electronic Resource
    Electronic Resource
    Experimental Study on Lapping Force Characteristics of Hard-Brittle Materials in Ultrasonic Vibration Lapping (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 359-360 (Nov. 2007), p. 379-383 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Hard-brittle materials have been popular used in manufacture experience because of theirexcellent performances. However the low plasticity, frangibility and non-conduction make themachining very difficult, especially in ultra-precise surface fabrication. Therefore, ultrasonicvibration is introduced to conventional lapping for the purpose of proper lapping force, higherremoval rate and fine surface quality. Through conventional and ultrasonic lapping experiment ofhard-brittle materials with different lapping parameters and different vibration models, the empiricalformula of lapping force in ultrasonic lapping is deduced by orthogonal regression analysis, theoptimum lapping parameters are put forward and the primary and secondary influencing sequenceof parameters on lapping force is presented. Moreover, the influencing rule of different lappingparameters such as rotational speed, feed speed, oilstone grit and lapping depth etc. on lapping forceis carried out. Experimental results show that ultrasonic vibration lapping is a high efficientprocessing method adapting to hard-brittle materials
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/55/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.359-360.379.pdf
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  • 6
    Electronic Resource
    Electronic Resource
    Parameters Optimization of the Ultrasonic External Cylindrical Lapping Process for Nano ZTA Engineering Ceramics Using Response Surface Methodology (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 364-366 (Dec. 2007), p. 733-738 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Aimed at the precision machining characteristics of nano ZTA engineering ceramicsexternal cylindrical components, ultrasonic aided lapping experiments were carried out adopting inhousedeveloped ultrasonic external cylindrical lapping device with solid abrasive material. Toobtain minimum surface roughness with constraint of the material removal rate, response surfacemethodology (RSM) was adopted to analyze the experimental data, and suitable experiment designwas chosen to fit the response surface in this research. Second-order surface response models ofsurface roughness and material removal rate were developed respectively, and the influence laws oflapping parameters on surface roughness and material removal rate were clarified according to thebuilt models. Finally, parameters optimization of the ultrasonic external cylindrical lapping processfor nano ZTA engineering ceramics was realized using surface response methodology
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/56/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.364-366.733.pdf
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  • 7
    Electronic Resource
    Electronic Resource
    Study on Material Removal Mechanism of Fine-Crystalline ZrO〈sub〉2〈/sub〉 Ceramics under Two Dimensional Ultrasonic Grinding (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 532-533 (Dec. 2006), p. 532-535 
    Details
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: In the paper, the machining characteristics of two dimensional ultrasonicgrinding(TDUG) are analyzed, and based on the analysis of the working locus of abrasive particleunder TDUG and mechanical performances of fine-crystalline ZrO2 ceramics, a theoretical modelof material removal rate[removed info]MRR[removed info]is proposed under TDUG with workpiece adhered to ultrasonicvibration respectively from the orthogonal directions. The model shows that any increase of staticload, size of grain, work speed, number of effective dynamic abrasive particle, the amplitude andfrequency of tool or any decrease of fracture toughness property and hardness will result in theincrease of the MRR, and the theoretical model of the MRR is tested, meanwhile the paper drawsthe conclusion that the surface quality under TDUG is superior to that under common grinding,which is tested by the means of grinding of fine-crystalline ZrO2 ceramics
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/14/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.532-533.532.pdf
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  • 8
    Electronic Resource
    Electronic Resource
    Surface Features in Honing Zirconia Ceramics Using Fine Grains with Ultrasonic Assistance (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 561-565 (Oct. 2007), p. 933-936 
    Details
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Experiments on surface features were carried out in honing zirconia engineering ceramicsusing fine grains. In ultrasonic honing, the surface fracture ratio increased quickly when the depth ofcut is more than 3 μm, while in common honing it performed an ascending trend from depth of cut 1.5μm. The value of surface roughness in ultrasonic honing increased along with the depth of cut; whileit descends contrast to the depth of cut when the honing velocity is less than 0.58 m/s in traditionalhoning. As for honing velocity over 0.74 m/s, it deceased firstly to the minimal value for depth of cut1μm, then began to ascend along with depth of cut. The value of surface roughness descended tominimum value for the range of honing velocity 0.41-0.58 m/s in traditional honing, while theoptimized honing velocity ranged 0.58-0.75 m/s in ultrasonic machining. The surface roughness inultrasonic honing was superior to that in traditional honing
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/17/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.561-565.933.pdf
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