High Speed Machining Considering Efficient Manual Finishing Part I: Phase Shift and Runout Affecting Surface Integrity

고속 가공을 이용한 금형의 효율적 생산 제 1 부: 이송 위상차와 런아웃이 가공면에 미치는 영향

  • 김민태 (서울대학교 대학원 기계항공공학부) ;
  • 제성욱 (LG 전자 생산 기술원) ;
  • 이해성 (서울대학교 대학원 기계항공공학부) ;
  • 주종남 (서울대학교 기계항공공학부)
  • Published : 2006.12.01

Abstract

In this work, the surface integrity smoothened with a ball end mill was investigated. Because surface integrity mainly affects the manual finishing process, $RV_{AM}$(Remaining Volume After Machining) was introduced, and it gives the relation between machining process and finishing process. Runout and phase shift which adversely affect surface integrity were considered in the generation of surface topography. Cutting points in ball end milling were identified with positional vectors and a set of vectors which have the minimum height in unit area was selected for the generation of surface and $RV_{AM}$. $RV_{AM}$ variation according to runout and phase shift was calculated and experimentally verified in proposed HSM conditions for mold machining. From the simulations and the experiments, a desirable High Speed Machining condition was suggested.

Keywords

References

  1. Altan, T., Lilly, B. and Yen, Y. C., 'Manufacturing of Dies and Molds,' Annals of the CIRP, Vol. 50, pp. 405-423, 2001
  2. Lee, H. S., 'Systematic Finishing Process of Injection Molds,' Ph.D. Thesis, Seoul National University, 2004
  3. Kim, M. T., 'Pattern Characteristics and Time Estimation in Manual Finishing Process of Ball End Milled Surface,' Ms. Thesis, Seoul National University, 2000
  4. Kline, W. A. and Devor, R. E., 'The Effect of Runout on Cutting Geometry and Forces in End Milling,' International Journal of Machine Tool Design and Research, Vol. 23, pp. 123-140, 1983 https://doi.org/10.1016/0020-7357(83)90012-4
  5. Sutherland, J. W. and Babin, T. S., 'The Geometry of Surfaces Generated by the Bottom of an End Mill,' Transactions of NAMRIISME, Vol. 16, pp. 202-208, 1988
  6. Armarego, E. J. A. and Despande, N. P., 'Computerized End Milling Force Prediction with Cutting Models Allowing for Eccentricity and Cutter Deflections,' Annals of the CIRP, Vol. 40, pp. 25-29, 1991 https://doi.org/10.1016/S0007-8506(07)61926-X
  7. Hekman, K. A. and Liang, S. Y., 'In-process Monitoring of End Milling Cutter Runout,' Mechatronics, Vol. 7, pp. 1-10, 1997 https://doi.org/10.1016/S0957-4158(96)00038-4
  8. Schulz, H. and Hock, St., 'High-Speed Milling of Dies and Moulds - Cutting Conditions and Technology,' Annals of the CIRP, Vol. 44, pp. 35-38, 1995 https://doi.org/10.1016/S0007-8506(07)62270-7
  9. Kim, M. T., 'High Speed Machining of Copper Electrode Considering Efficient Manual Finishing,' Ph.D. Thesis, Seoul National University, 2006