Tribology and Lubricants

Korean Tribology Society (한국트라이볼로지학회)
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Effect of Rotating Speed and Air Flow Rate on Material Removal Characteristics in Abrasive Fluidized Bed Machining of Polyacetal

폴리아세탈의 입자유동베드 가공에서 회전속도와 공기 유량이 재료제거 특성에 미치는 영향

  • Jang, Yangjae (Graduate School, Dept. of Mechanical System Engineering, Tongmyong University) ;
  • Kim, Taekyoung (School of Mechanical Engineering, Tongmyong University) ;
  • Hwang, Heondeok (School of Mechanical Engineering, Tongmyong University) ;
  • Seo, Joonyoung (School of Mechanical Engineering, Tongmyong University) ;
  • Lee, Dasol (School of Mechanical Engineering, Pusan National University) ;
  • Lee, Hyunseop (School of Mechanical Engineering, Tongmyong University)
  • 장양제 (동명대학교 대학원 기계시스템공학과) ;
  • 김태경 (동명대학교 기계공학부) ;
  • 황현덕 (동명대학교 기계공학부) ;
  • 서준영 (동명대학교 기계공학부) ;
  • 이다솔 (부산대학교 기계공학부) ;
  • 이현섭 (동명대학교 기계공학부)
  • Received : 2017.08.24
  • Accepted : 2017.09.18
  • Published : 2017.10.31
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Abstract

Abrasive fluidized bed machining (AFBM) is similar to general abrasive fluidized machining (AFM) in that it can perform polishing of the outer and inner surfaces of a 3-dimensional shape by the flow of particles. However, in the case of AFM, the shear force generated by the flow of the particles causes material removal, while in AFBM, the abrasive particles are suspended in the chamber to form a bed. AFBM can be used for deburring, polishing, edge contouring, shot peening, and cleaning of mechanical parts. Most studies on AFBM are limited to metals, and research on application of AFBM to plastic materials has not been performed yet. Therefore, in this study, we investigate the effect of rotating speed of the specimen and the air flow rate on the material removal characteristics during AFBM of polyacetal with a horizontal AFBM machine. The material removal rate (MRR) increases linearly with increase of the rotating speed of the main shaft because of the shear force between the particles of the fluidized bed and the rotation of the workpiece. The reduction in surface roughness tends to increase as the rotating speed of the main shaft increases. As the air flow rate increases, the MRR tends to decrease. At a flow rate of 70 L/min or more, the MRR remains almost constant. The reduction of the surface roughness of the specimen is found to decrease with increasing air flow rate.

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References

  1. Massarsky, M. and Davidson, D. A., "Turbo-Abrasive Machining and Finishing", Metal Finishing, Vol. 95, Issue 7, pp. 29-31, 1997.
  2. Barletta, M., "A new technology in surface finish-ing: Fluidized bed machining (FBM) of aluminium alloys", J. Mater. Proc. Technol., Vol. 173, Issue 10, pp. 157-165, 2006. https://doi.org/10.1016/j.jmatprotec.2005.11.020
  3. Barletta, M., "Progress in abrasive fluidized bed machining", J. Mater. Proc. Technol., Vol. 209, pp. 6087-6102, 2009. https://doi.org/10.1016/j.jmatprotec.2009.04.009
  4. Barletta, M., Gisario, A., Venettacci, S., Bubino, G., "A comparative evaluation of fluidized bed assisted drag finishing and centrifugal disk dry finishing", Eng. Sci. Technol. Inter. J., Vol. 17, pp. 63-72, 2014. https://doi.org/10.1016/j.jestch.2014.03.007
  5. Barletta, M., Gisario, A., "High speed finishing of a CuZn16 brass alloy by Abrasive Recirculating Fluidized Bed (ARFB)", Powder Technol., Vol. 203, Issue 3, pp. 591-602, 2010. https://doi.org/10.1016/j.powtec.2010.06.026
  6. Barletta, M., Guarino S., Bubino, G., Tagliaferri, V., "Progress in fluidized bed assisted abrasive jet machining (FB-AJM): Internal polishing of aluminium tubes," Int. J. Mach. Tool. Manufact., Vol. 47, Issue 3-4, pp. 483-495, 2007. https://doi.org/10.1016/j.ijmachtools.2006.06.005
  7. Polini, R., Barletta, M., Delogy, M., "Fluidized bed micro-machining and HFCVD of diamond films onto Co-cemented tungsten carbide (WC-Co) hardmetal slabs", Thin Solid Films, Vol. 515, Issue 1, pp. 87- 94, 2006. https://doi.org/10.1016/j.tsf.2005.12.056