Efficient CNC Milling by Adjusting Material Removal Rate

Authors: Majid Tolouei-Rad

Abstract:

This paper describes a combined mathematicalgraphical approach for optimum tool path planning in order to improve machining efficiency. A methodology has been used that stabilizes machining operations by adjusting material removal rate in pocket milling operations while keeping cutting forces within limits. This increases the life of cutting tool and reduces the risk of tool breakage, machining vibration, and chatter. Case studies reveal the fact that application of this approach could result in a slight increase of machining time, however, a considerable reduction of tooling cost, machining vibration, noise and chatter can be achieved in addition to producing a better surface finish.

Keywords: CNC machines, milling, optimization, removal rate.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1079140

References:

[1] L. Song, S. K. Cao, K. Feng Song, C. Z. Wu, and W. W. Song, "Software Module Development for Free-Form Surface Five-Axis Machining Path and Tool Posture Simultaneous Optimization", Applied Mechanics and Materials, vol.55-57, 2011, pp.1932-1937.
[2] M. Tolouei-Rad, "An approach towards fully integration of CAD and CAM technologies," Journal of Achievements in Materials and Manufacturing Engineering, vol. 18, 2006, pp. 31-36.
[3] H. El-Mounayri, H. Kishawy, and V. Tandon, "Optimized CNC endmilling: a practical approach," International Journal of Computer Integrated Manufacturing, vol. 15, 2002, pp. 453-470.
[4] M. Chandrasekaran, M. Muralidhar, C. Murali Krishna and U. S. Dixit, "Application of soft computing techniques in machining performance prediction and optimization: a literature review," International Journal of Advanced Manufacturing Technology, vol. 46, 2010, pp. 445-464.
[5] A. A. Afifi, D. R. Hayhurst, and W. A. Khan, " Non-productive tool path optimization of multi-tool part programs," International Journal of Advanced Manufacturing Technology, vol. 55, no. 9-12, 2011, pp. 1007- 1023.
[6] C. H. Chu, C. T. Lee, K. W. Tien and C.J. Ting, "Efficient tool path planning for 5-axis flank milling of ruled surfaces using ant colony system algorithms," International Journal of Production Research, vol. 49, 2011, pp. 1557-1574.
[7] Z. C. Wei, M. J. Wang, J. N. Zhu and L. Y. Gu, "Cutting force prediction in ball end milling of sculptured surface with Z-level contouring tool path," International Journal of Machine Tools and Manufacture, vol. 51, 2011, pp. 428-432.
[8] J. K. Rai, D. Brand, M. Slama and P. Xirouchakis, "Optimal selection of cutting parameters in multi-tool milling operations using a genetic algorithm," International Journal of Production Research, vol. 49, no. 10, 2011, pp. 3045-3068.
[9] X. F. Zhao, X. L. Liu, D.K. Jia and K. Ding, "Ball-end milling force modeling and simulation based on cutting path optimization experiments," Advanced Materials Research, vol. 188, no. 9-12, 2011, pp. 348-351.
[10] Choy, H. S. and Chan, K. W., "A corner-looping based tool path for pocket milling," Computer-Aided Design, vol. 35, 2003, pp. 155-166.
[11] Z. Yao and S.K. Gupta, "Cutter path generation for 2.5D milling by combining multiple different cutting path patterns," International Journal of Production Research, vol. 41, 2004, pp. 2141-2161.
[12] H. C. Kim and M. Y. Yang, "An optimum 2.5D contour parallel tool path," International Journal of Precision Engineering and Manufacturing, vol. 8, 2007, pp. 16-20.
[13] H. S. Choy and K.W. Chan, "A corner-looping based tool path for pocket milling," Computer-Aided Design, vol. 35, 2003, pp. 155-166.
[14] T. Kramer, Pocket milling with tool engagement detection, SME Publication, Product ID: JS92WBD2, 1992.
[15] E. Budaka and A. Tekelia, "Selection of axial and radial depth of cut pairs," CIRP Annals - Manufacturing Technology, vol. 54, 2005, pp. 353-356.
[16] M. Rauch and J. Y. Hascoet, "Rough pocket milling with trochoidal and plunging strategies," International Journal of Machining and Machinability of Materials, vol. 2, 2007, pp. 161-175.
[17] M. Tolouei-Rad and I. M. Bidhendi, "On the optimization of machining parameters for milling operations," International Journal of Machine Tools & Manufacture, vol. 37, 1997, pp. 1-16.
[18] S. H. Bae, K. Ko, B. H. Kim and B. K. Choi, "Automatic feedrate adjustment for pocket machining," Computer-Aided Design, vol. 35, 2003, pp. 495-500.