Journal of Advanced Marine Engineering and Technology

  • 제34권7호
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  • Pages.963-970
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  • 2010
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  • 2234-7925(pISSN)
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  • 2234-8352(eISSN)
한국마린엔지니어링학회 (The Korean Society of Marine Engineering)
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Characteristics of Si3N4 Laser Assisted Machining according to the Laser Power and Feed Rate

  • Kim, Jong-Do (Korea Maritime University, Division of Marine System Engineering) ;
  • Lee, Su-Jin (Korea Maritime University) ;
  • Suh, Jeong (Korea Institute of Machinery & Materials)
  • 투고 : 2010.05.31
  • 심사 : 2010.08.10
  • 발행 : 2010.11.30
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초록

This study makes an estimate of the laser-assisted machining (LAM) of an economically viable process for manufacturing precision silicon nitride ceramic parts using a high-power diode laser (HPDL). The surface is locally heated by an intense laser source prior to material removal, and the resulting softening and damage of the workpiece surface simplify the machining of the ceramics. The most important advantage of LAM is its ability to produce much better workpiece surface quality compared to conventional machining. Also important are its larger material removal rates and longer tool life. The cutting force and surface temperature were measured on-line using a pyrometer and a dynamometer, respectively. Tool wear, chips and the surface of the workpiece were measured using optical microscopy, and the surface and fractured cross-section of $Si_3N_4$ were measured by SEM. During the LAM process, the cutting force and tool wear were reduced and oxidation of the machined surface was increased according to the increase in the laser power. Moreover, the more the feed rate increased, the more the cutting force and tool wear increased.

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참고문헌

  1. M.H. Bocanegra-Bernal, B. Matovic, "Dense and near-net-shape fabrication of $Si_3N_4$ ceramics", Materials Science and Engineering A, 500, pp. 130-149, 2009. https://doi.org/10.1016/j.msea.2008.09.015
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  6. Chih-Wei Chang, Chun-Pao Kuo, "Evaluation of surface roughness in laser-assisted machinig of aluminum oxide ceramics with taguchi method", International Journal of Machine Tools & Manufacture, vol.47, pp. 141-147, 2007. https://doi.org/10.1016/j.ijmachtools.2006.02.009
  7. Jong-Do Kim, Su-Jin Lee, Hee-Jong Yoon, and Seo-Jeong Park, "The characteristics of laser assisted machining for $Si_3N_4$ by laser power and cutting feed rate", The 5th International Congress on Laser Advanced Materials Processing LAMP 2009, HPL-3, Removal, #TuOH 4-4(#258), p. 154, 2009.
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피인용 문헌

  1. Microstructural variations and machining characteristics of silicon nitride ceramics from increasing the temperature in laser assisted machining vol.15, pp.7, 2014, https://doi.org/10.1007/s12541-014-0466-y