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  • 1
    Electronic Resource
    Electronic Resource
    Experimental Investigation on Effects of Depth of Cut on Micro-Geometric Properties in Quick-Point Grinding (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 359-360 (Nov. 2007), p. 103-107 
    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: Quick-point grinding is used to machine the round surface with super abrasive wheel athigh grinding speed. Because it is point contact between the grinding wheel and the workpiece dueto the point grinding angles in the process, the grinding model is different from the conventionalcylindrical grinding in theory. Especially, the edge contact width between the wheel and theworkpiece is not always equal to the thickness of the wheel, but rests with the depth of cut and thegrinding angles greatly. The depth of cut has the effects on the micro-geometric propertiesespecially the ground surface roughness by means of the variations of the edge contact width, thegrinding force and heat in the process. Based on the theoretical studies on the surface roughness, thequick-point grinding experiments and the measures for the surface roughness were performed atdifferent depth of cut. The effective mechanism of the depth of cut on the ground surface roughnesswas analyzed deeply. Some conclusions to influence surface roughness were also gained
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/55/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.359-360.103.pdf
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  • 2
    Electronic Resource
    Electronic Resource
    Study on Effects of Grinding Speed on Finish and Precision Machining in Quick-Point Grinding (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 364-366 (Dec. 2007), p. 696-700 
    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: According to the analysis in theory, the model of quick-point grinding is different fromconventional cylindrical grinding because it is point contact between the grinding wheel and theworkpiece due to the point-grinding angles in two directions and the lower grain depth of cut in theprocess. Especially, the grinding speed has the great effects on the micro-geometry properties andthe machining precision of the workpiece surface in the process. Based on the theoretical studies onthe surface roughness, the grinding experiments and the measurements of the surface roughness athigh grinding speeds were performed in quick-point grinding process. Furthermore, the influencingmechanism of the grinding speed on the ground surface roughness was analyzed. Some conclusionsof the grinding parameters influencing precision machining and surface integrity were deduced
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/56/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.364-366.696.pdf
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  • 3
    Electronic Resource
    Electronic Resource
    Model and Simulation of Slurry Velocity and Hydrodynamic Pressure in Abrasive Jet Finishing with Grinding Wheel as Restraint (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 375-376 (Mar. 2008), p. 449-453 
    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: The models for three-dimensional velocity and hydrodynamic pressure of abrasive fluidin contact zone between wheel and workpiece on abrasive jet finishing with wheel as restraint werepresented based on Navier-Stokes equation and continuous formulae. The emulational resultsshown that the hydrodynamic pressure was proportion to grinding wheel velocity, and inverseproportion to the minimum gap between wheel and workpiece and the maximum pressure wasgenerated just in the minimum clearance region in which higher fluid pressure gradient occur. It canalso be concluded the pressure distribution was uniform in the direction of width of wheel except atthe edge of wheel because of the side-leakage. The velocity in the x direction was dominant and theside-leakage in the y direction existed. The velocity in the z direction was smaller than the othersbecause of the assumption of laminar flow. The smaller the gap distance is, the larger the velocity inthe x direction. The magnitude of the velocity is also proportional to the surface velocity of thewheel
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/57/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.375-376.449.pdf
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  • 4
    Electronic Resource
    Electronic Resource
    Study on Balance Precision of Ultra-High Speed CBN Grinding Wheel System (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 375-376 (Mar. 2008), p. 614-618 
    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: The balance precision of grinding wheel is a key technical parameter in ultra-high speedgrinding process. The actual standard for the balance precision of rigid rotor is not fit for the thinultra-high speed grinding system well. The unbalance factors affected on the ultra-high speedgrinding wheel and its system were analyzed, and its effects on the machining quality in the processwere also discussed. The theory and select principle of the balance precision for ultra-high speedgrinding wheel system were studied. The test of dynamic performance was performed for the thinultra-high speed CBN grinding wheel system whose structure was optimized. The groundwork toestablish the standard of balance precision for thin ultra-high speed grinding system was offered
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/57/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.375-376.614.pdf
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  • 5
    Electronic Resource
    Electronic Resource
    Power Spectral Density Analysis Finished Surface by Abrasive Jet with Grinding Wheel as Restraint (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Advanced materials research Vol. 24-25 (Sept. 2007), p. 337-342 
    Details
    ISSN: 1662-8985
    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: The abrasive jet finishing process with wheel as restraint is a kind of compoundprecision finishing process that combined grinding with abrasive jet precision machining, in whichinject slurry of abrasive and liquid solvent to grinding zone between grinding wheel and worksurface under no depth of cut feed condition when workpiece grinding were accomplished. Theabrasive particles are driven and energized by the rotating grinding wheel and liquid hydrodynamicpressure and increased slurry speed between grinding wheel and work surface to achieve microremoval machining. The micro removal machining with grinding wheel as restraint, not only toattain higher surface form accuracy but also to can efficiently acquire defect-free finishing surfacewith Ra0.15~1.6$m and finally achieve high efficiency, high precision and low roughness values,furthermore, integrating grinding process and abrasive jet finishing into one features. In the paper,surface topography finished by abrasive jet with grinding wheel as restraint was analyzed andevaluated with power spectral density function. Experiments were performed with plane grinderM7120 and workpiece material 45 steel. The machined surface morphology was studied usingScanning Electron Microscope (SEM) and the microscope and microcosmic geometry parameterswere measured with TALYSURF5 instrument. The experimental results show that microcosmicgeometry parameter values were diminished comparing with ground surface. Furthermore, the meanripple peak distancing was decreased and, ripple and peak density were increased. The resultsindicate that surface qualities by machined with abrasive jet precision finishing were improvedobviously
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/39/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.24-25.337.pdf
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  • 6
    Electronic Resource
    Electronic Resource
    Theoretical Analysis and Experimental Verification of Validity Finished by Abrasive Jet with Grinding Wheel as Restraint (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Advanced materials research Vol. 53-54 (July 2008), p. 39-44 
    Details
    ISSN: 1662-8985
    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: The integration manufacturing technology is a kind of compound precision finishingprocess that combined grinding with abrasive jet finishing, in which inject slurry of abrasive andliquid solvent into grinding zone between grinding wheel and work surface under no radial feedcondition when workpiece grinding were accomplished. The abrasive particles are driven andenergized by the rotating grinding wheel and liquid hydrodynamic pressure and increased slurryspeed between grinding wheel and work surface to achieve micro removal finishing. In the paper,the machining process validity was verified by experimental investigation. Experiments wereperformed with plane grinder M7120 and workpiece material 40Cr steel which was ground with thesurface roughness mean values of Ra=0.6μm. The machined surface morphology was studied usingScanning Electron Microscope (SEM) and metallography microscope and microcosmic geometryparameters were measured with TALYSURF5 instrument respectively. The experimental resultsshow the novelty process method, not only can obviously diminish longitudinal geometry parametervalues of ground surface, but also can attain isotropy surface and uniformity veins at parallel andperpendicular machining direction. Furthermore, the finished surface has little comparabilitycompared to grinding machining surface and the process validity was verified
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/41/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.53-54.39.pdf
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  • 7
    Electronic Resource
    Electronic Resource
    Experimental Study on Surface Finishing Performances in Quick-Point Grinding (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Advanced materials research Vol. 24-25 (Sept. 2007), p. 97-102 
    Details
    ISSN: 1662-8985
    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: There are lower grinding force and temperature in quick-point grinding process becauseof the higher grinding speed and the less depth of cut, especially the point contact between thegrinding wheel and the workpiece due to the point grinding angles. Thus it can achieve bettersurface finishing process in grinding cylindrical surface. Since the point grinding model is differentfrom the conventional cylindrical grinding in theory, the surface roughness is in relation to thepoint-grinding angles greatly besides the grain granularity, depth of cut, grinding speed and axialfeeding rate like the conventional cylindrical grinding process. Based on the theoretical studies onthe surface roughness in the process, the surface finishing experiments and measures at the variousgrinding parameters were performed. The experimental results show that the process parameters,such as point-grinding angles, depth of cut, grinding speed and axial feeding rate, must becontrolled reasonably for the higher surface finishing demand in quick-point grinding process
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/39/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.24-25.97.pdf
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  • 8
    Electronic Resource
    Electronic Resource
    Application of Lubrication Theory to Near-Dry Green Grinding – Feasibility Analysis (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Advanced materials research Vol. 44-46 (June 2008), p. 135-142 
    Details
    ISSN: 1662-8985
    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: This paper describes an investigation about the grinding fluid optimization supply basedon lubrication theory. The models for three-dimensional hydrodynamic flow pressure in contactzone between wheel and work are presented based on Navier-Stokes equation and continuousformulae. It is well known that hydrodynamic fluid pressure generates due to this fluid flux, andthat it affects overall grinding resistance and machining accuracy. Moreover, conventional methodsof delivering grinding fluid, i.e. flood delivery via a shoe or jet delivery tangential to the wheel via anozzle, have been proved that they can not fully penetrate this boundary layer and thus, the majorityof the cutting fluid is deflected away from the grinding zone. Therefore, in this paper, a newdelivery method of grinding fluid, the minimum quantity lubricant (MQL)-near-dry green grindingis presented and analyzed for it not only reduces hydrodynamic lift force but also reduces grindingfluid cost to achieve green manufacturing. Experiments have been carried out to validate theperformance of the MQL supply compared with conventional flood cooling. The experimentalresults have shown that the theoretical model is in agreement with experimental results and themodel can well forecast hydrodynamic pressure distribution at contact zone between and workpieceand the MQL supply in grinding is feasible. Experiments have also been carried out to evaluate theperformance of the MQL technology compared with conventional flood cooling. Experimental dataindicate that the proposed method does not negatively affect to the surface integrity and the processvalidity has been verified
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/40/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.44-46.135.pdf
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  • 9
    Electronic Resource
    Electronic Resource
    Experimental Investigation into Surface Integrity Finished by Abrasive Jet with Grinding Wheel as Restraint (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 359-360 (Nov. 2007), p. 244-248 
    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: The surface integrity finished by abrasive jet with grinding wheel as restraint wasexperimentally investigated. Experiments were performed with plane grinder M7120 equiped withabrasive jet finishing device and harded workpiece material 45 steel which was ground with thesurface roughness values of Ra=0.6μm.The machined surface morphology was studied usingScanning Electron Microscope (SEM) and microscope and microcosmic geometry parameters weremeasured with TALYSURF5 instrument. The surface hardness for ground and finished surface wasmeasured with HVS-1000 instrument and the phase structure was analyzed by X-ray energydispersive spectram and residual stresses were measured by PW3208 X-ray diffraction. The Resultsshow that longitudinal geometry parameter values were diminished and ripple was obviouslyimproved comparing with ground surface. Furthermore, the finished surface has condensibleresidual stresses and high surface hardness comparability compared to grinding machining surface.As a result, life and precision consistency of finished workpiece were improved
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/55/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.359-360.244.pdf
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  • 10
    Electronic Resource
    Electronic Resource
    Study on Side Contact Layer Model and Parameters in Quick-Point Grinding (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 532-533 (Dec. 2006), p. 781-784 
    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: The main function of the wheel side is to remove the material and the main function of thewheel edge is to finish the workpiece in quick-point grinding process. So the grinding layer model ofconventional cylindrical grinding process is not fit for quick-point grinding process anymore. Basedon the technical characters and the principle of the process, a new side contact layer model and theformulas to calculate the contact layer parameters are presented. It is basement to study themechanism of materials removal and wheel wear in quick-point grinding process
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/14/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.532-533.781.pdf
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