한국공작기계학회논문집 (Transactions of the Korean Society of Machine Tool Engineers)

한국생산제조학회 (The Korean Society of Manufacturing Technology Engineers)
권호 표지

다이아몬드 코어드릴 공정의 구멍가공 특성과 모델링

Drilling Characteristics and Modeling of Diamond Core Drilling Processes

  • 발행 : 2008.08.15
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

Diamond core drills are applied to drill difficult-to-cut materials. This paper proposes basic understanding of ceramic drilling mechanics and characteristics of main factors affecting tool life, tool wear, cutting force, and chipping thickness. In contrast to conventional drilling, the core drilling process make deep grooves on the workpiece. One difficulty of it is the evacuation of chips from the drilled groove. As the drilling depth increases, an increased amount of chips tend to cluster together and clog the groove. Eventually severe wear develops and diamond grits are separated from the drill body. To relieve the clogging problem and to evacuate chips from the groove easily, the helical drilling process is applied for the core drilling process. To analyze drilling characteristics and derive optimal drilling conditions, tool life, tool wear, cutting force, and chipping thickness are quantified through the monitoring system and the Taguchi method. Mathematical models for the tool life and chipping thickness are derived from the response surface method. Optimal drilling database has been constructed through the experimental models.

키워드

참고문헌

  1. Balykov, A. V., 2003, "Modeling of Diamond Drilling of Holes in Brittle Nonmetallic Solid Materials," Glass and Ceramics, Vol. 60, No. 3-4, pp. 13-16
  2. Zhang, Q. H, Zhang, J. H, Sun, D. M., and Wang, G. D., 2002, "Study on the Diamond Tool Drilling of Engineering Ceramics," Journal of Materials Processing Technology, Vol. 122, pp. 232-236 https://doi.org/10.1016/S0924-0136(02)00016-X
  3. Huang, S. L. and Wang, Z. W., 1997, "The Mechanics of Diamond Core Drilling of Rocks," Int. J. Rock Mech. & Min. Sci, Vol. 34, No. 3-4, Paper No. 134
  4. Ishikawa, K., Suwabe, H., Nishide, T., and Uneda, M., 1998, "A Study on Combined Vibration Drilling by Ultrasonic and Low-frequency Vibrations for Hard and Brittle Materials," Precision Engineering, Vol. 22, pp. 196-205 https://doi.org/10.1016/S0141-6359(98)00014-2
  5. Yagishita, H., 2007, "Comparing Drilling and Circular Milling for Hole Making in Carbon Fiber Reinforced Plastic(CFRP) Laminates," Transactions of NAMRI/SME, Vol. 35, pp. 153-160
  6. Choi, Y. J. and Chung, S. C., 2006, "Monitoring of Micro-drill Wear by Using the Machine Vision System," Transactions of the NAMRI/SME, Vol. 34, pp. 143-150
  7. Park, S. H., 2006, Modern Design of Experiments, Minyongsa, Korea
  8. Shi, Z. and Malkin, S., 2006, "Wear of Electroplated CBN Grinding Wheels," Transaction of the ASME, Vol. 128, pp. 110-118
  9. Jiao, Y., Liu, W. J., Pei, Z. J., Xin, X. J., and Treadwell, C., 2005, "Study on Edge Chipping in Rotary Ultrasonic Machining of Ceramics: An Integration of Designed Experiments and Finite Element Method Analysis," Transactions of the ASME, Vol. 127, pp. 752-758
  10. Chung, S. C., 1992, "Development of Adaptive Numerical Control System (I) - Intelligent Selection of Machining Parameters by Neural-Network Methodology," Transactions of the KSME, Vol. 16, No. 7, pp. 1223-1233