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  • 1
    Electronic Resource
    Electronic Resource
    Effect of Chamfered PCBN Tool Edge Geometries on Hard Turning Process (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 375-376 (Mar. 2008), p. 187-191 
    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: By cutting experiments, this paper investigates the effect of various chamfer widths andchamfer angles on cutting force, cutting temperature, and chip morphology when hardened steelGCr15(HRC60+2) is machined with PCBN tools. The research results indicate that with theenlargement of chamfer angle both cutting temperature and main cutting force increase gradually, andespecially, radial force increases more significantly. In addition, it is shown that as chamfer widthincreases both cutting force and cutting temperature rise. The analytical results of chips derived fromcutting experiments reveal that chamfer angle being 20º, chips are the thickest and less serrated.Furthermore, chip thickness diminishes gradually with the increment of chamfer width
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/57/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.375-376.187.pdf
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Experimental Research on Orthogonal Cutting and Oblique Cutting of Hardened Steel GCr15 (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 375-376 (Mar. 2008), p. 192-196 
    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: Experiment of hard cutting GCr15 with PCBN cutting tools, the influence of tool’sinclination angle and cutting parameters (cutting speed and feed speed) on cutting forces and cuttingtemperature are studied. A three-dimensional finite elements model using the commercial softwareDeform 3D 5.03 is developed. The friction between the tool and the chip is assumed to follow amodified Coulomb friction law and the adaptive remeshing technique is using for the formation ofchip. The workpiece material property is a function of temperature, strain, and strain rate in theprimary and secondary shear zones. Finite element method is used to simulate three-dimensionalprecision cutting, including orthogonal cutting and oblique cutting. The cutting forces and backforces are slightly changed by tool’s inclination angle. However, in high cutting speed, the cuttingforce decrease as the tool’s inclination angle increase, while the cutting temperature increase as thetool’s inclination angle increase. The simulation results are compared with experimentally measureddata and found to be in good agreement to some extent
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/57/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.375-376.192.pdf
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Effect of Air Cooling on the Process of High Speed Hard Cutting GCr15 (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 532-533 (Dec. 2006), p. 369-372 
    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: Air cooling is a near dry machining method, which cools cutting area and evacuates chipusing low temperature wind instead of cutting liquid. It can decrease tool wear, improve tool life,reduce cost and produce no chemical pollution. In this paper, air cooling system is established, inwhich vortex tube is used for cooling. Air cooling test was carried on, in which high hardness bearsteel GCr15 is machined by PCBN tool. Experiment results indicated that cold air from vortex tubehas a significant effect on cutting force, cutting temperature and chip formation process. Cuttingforce and cutting temperature were simulated using Marc. Change rules that analysis resultsindicated are in accordance with experiment results. This paper’s conclusions have a great referencevalue for the practical application of air cooling technology
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/14/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.532-533.369.pdf
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Effect of Different Edge Preparation on High Speed Turning Hardened Steel Process (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 532-533 (Dec. 2006), p. 412-415 
    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: Through combining turning experiments and FE simulations, this paper studied theeffects of force, temperature and residual stress of machined surface on high speed hard turningGCr15 bearing steel hardened to HRC60-62 with three kinds of ordinary edge preparation(sharp-edge, hone and chamfer). The experiment and simulation results indicated that thediathermanous proportion of chamfered edge preparation to tool and machined surface is less, andthis distribution of cutting temperatures is useful for tool life and machined surface quality. Thesimulation results showed that cutting force had a descending tendency with increasing of cuttingspeed, which is in accordance with the change rules of machining general rigidity material, and itproved that FE simulations have good precision. The simulation results of residual stress ofmachined surface showed that residual tensile stress existed in machined surface using both honedand chamfered tools, and a highest compressive stress (about -200MPa) existed among 150-200μmof the depth into the workpiece surface. The difference was that the depth of superficial hardenlayer with honed tools is larger than that with chamfered tools
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/14/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.532-533.412.pdf
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    Paper (German National Licenses)
    Fulltext
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