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

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

An Evaluation on Cutting Characteristics in Milling Process with Different Helix Angle Endmills

밀링가공에서 부등각 엔드밀의 절삭특성 평가

  • 이상복 (대구기능대학 컴퓨터응용기계과) ;
  • 김원일 (경남대 기계자동화공학부) ;
  • 왕덕현 (경남대 기계자동화공학부) ;
  • 김실경 (대구기능대학 컴퓨터응용기계과)
  • Published : 2003.12.01
Download PDF
⟨ Previous Next ⟩

Abstract

The experimental research was conducted to find an end mill with an ideal helix angle, which has a superior anti-vibration effect and a low machining tolerance. A conventional endmill which all low blades are $30^{\circ}$ helix angles and a different helix angle endmill which the opposite two blades are $30^{\circ}$ and the other opposites are different helix angles were studied. The cutting farce, machining tolerance and surface roughness were obtained. The AE signals appeared to have low values in up-milling rather than in down-milling. These are also appeared to have low values at low spindle revolutions rates. The cutting force values of Fxy and Fxyz were found to be increased according to the value of helix angle. In up-milling, it was difficult to find a definite tendency in machining tolerance, but in down-milling machining tolerance of the different helix angle end mill was found to be lower than that of the convention end mill. There is a definite tendency that the surface roughness gets better as the RPM increases. In down-milling, Type A($25^{\circ}$＋$30^{\circ}$) appeared to bring the most satisfactory result.

Keywords

References

  1. Tlusty, J. and Macneil, P., 1975, 'Dynamic of Cutting Force in End Milling', Annals of CIRP, Vol. 24, PP. 21-25
  2. Budak, E. and Altintas, Y., 1998, 'Analytical Prediction of Chatter Stability in Milling-Part- I :General Formulation', Trans. of ASME Dynamic Systems, Measurement, and Control, Vol. 120, pp. 22-30 https://doi.org/10.1115/1.2801317
  3. Elbestawi, M. A., Ismail, F., Du, R: and Ullagadi, B. C., 1994, 'Modelling Machining Dynamics Including Damping in the Tool-Workpiece interface', Trans. of ASME of Engineering for Industy, Vol.116, pp. 435-439 https://doi.org/10.1115/1.2902125
  4. Shin, Y. C. and Waters, A. J., 1997, 'A New Procedure to Determeni Instantaneous Cutting Force Coefficient for Maching Force Prediction', Int. J. for Mach. Tools Manufacture, Vol. 37, pp. 1337-1351 https://doi.org/10.1016/S0890-6955(96)00093-4
  5. Wang, W. P., 1998, 'Solid Modeling for Optimizing Metal Removal of Three Dimensional End Milling', J. of Mach. Syst, Vol. 7, pp. 57-65
  6. Devor, R. E., Kline, W. A. and Zdeblick, W. J., 1980, 'A Mechanistic Model for the Force System in End Milling with Application to Machining Airframe Structures', Proceeding of 8th NAMRC, pp. 297-303
  7. Kline, W. A, Devor R E. and Lindberg, J. R., 1982 'The Prediction of Cutting Force in End Milling with Application to Cornering Cuts', Int. J. for Mach. Tool Des., Vol. 22, pp. 7-22 https://doi.org/10.1016/0020-7357(82)90016-6