ROTARY ULTRASONIC ASSISTED MACHINING OF MOULD AND DIE MATERIAL
Abstract
The high strength properties of hardened steel AISI D2 material (~51 HRc) have created problems to the conventional machining process; poor machined surface, high cutting force, extreme machining temperature and rapid tool wear. In order to solve the discrepancies in machining the material, this paper proposed a hybrid machining process technique that combined a high frequency ultrasonic vibration (~20 kHz) with the rotating end mill. An in-house ultrasonic tool holder that fitted the CNC machine spindle was developed to perform the ultrasonic assisted machining process. A set of experimental work was conducted to evaluate the improvement of the ultrasonic vibration in the cutting process. The evaluation included the effects of machining parameter namely cutting speed, feed rate, depth of cut, ultrasonic frequency and vibration amplitude in improving the surface roughness value for machining hardened AISI D2 material. The analytical results demonstrated that the presence of the ultrasonic vibration was able to improve the machined surface roughness in that up to 80% reduction in Ra value was observed as compared to the conventional machining process within the same cutting conditions.
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References
E. Budak, I. Lazoglu, and B. U. Guzel, “Improving cycle time in sculptured surface machining through force modeling”, CIRP Annals, vol. 53, no. 1, pp. 103–106, 2004.
R. Izamshah, M. Zulhairy, M. Kasim, M. Hadzley, M. Amran and M. Amri and Sivarao, “Cutter path strategies for shoulder milling of thin deflecting walls”, Advanced Material Research, vol. 903, pp. 175–180, 2014.
E. Shamoto, N. Suzuki, E. Tsuchiya, Y. Hori, H. Inagaki and K. Yoshino, “Development of 3 DOF ultrasonic vibration tool for elliptical vibration cutting of sculptured surfaces”, CIRP Annals, vol. 54, no. 1, pp. 321–324, 2005.
R. Suresh, S. Basavarajappa, V.N. Gaitonde, G.L. Samuel, and J. Paulo Davim, “State-of-the-Art research in machinability of hardened steels”, Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture, vol. 227, no. 2, pp. 191–209, 2013.
B. C. Routara, A. K. Sahoo, A. K. Rout, and D. N. Thatoi, “Optimization of multiple performance characterstic in ultrasonic machining process using grey relational analysis”, in Proceedings of the International Conference on Mechancal Engineering, Dhaka, Bangladesh, 2011, pp. 18–20.
W. L. Cong, Z. J. Pei, N. Mohanty, E. Van Vleet, and C. Treadwell, “Vibration amplitude in rotary ultrasonic machining: a novel measurement method and effects of process variables”, Journal of Manufacturing Science and Engineering, vol. 133, no. 3, pp. 034501-1–034501-5, 2011.
R. P. Singh and S. Singhal, “Rotary ultrasonic machining of advanced materials: a review”, International Journal Technology for Research in Engineering, vol. 2, no. 7, pp. 777–785, 2015.
G. Ya, H. W. Qin, S. C. Yang and Y. W. Xu, “Analysis of the rotary ultrasonic machining mechanism”, Journal of Materials Processing Technology, vol. 129, no. 1–3, pp. 182–185, 2002.
H. Lian, Z. Guo, Z. Huang, Y. Tang and J. Song, “Experimental research of Al6061 on ultrasonic vibration assisted micro-milling”, Procedia CIRP, vol. 6, pp. 561–564, 2013.
T. Moriwaki, E. Shamoto, Y. Song and S. Kohda, “Development of a elliptical vibration milling machine”, CIRP Annals, vol. 53, no. 1, pp. 341–344, 2004.
N. Suzuki. (2011). Ultraprecision sculpturing of hardened steel by applying elliptical vibration cutting [Online]. Available: http://www.jspe.or.jp/wp_e/wp-content/uploads/isupen/2011 s/2011s-2-6.pdf
M. S. Kasim, C. H. Che Haron, J. A. Ghani, and M. A. Sulaiman, “Prediction surface roughness in high-speed milling of inconel 718 under MQL using RSM method”, Middle-East Journal Science and Research, vol. 13, no. 3, pp. 264–272, 2013.
P. Guo and K.F. Ehmann, “An analysis of the surface generation mechanics of the elliptical vibration texturing process”, International Journal of Machine Tools and Manufacture, vol. 64, pp. 85–95, 2013.
X. Zhang, A. S. Kumar, M. Rahman, C. Nath and K. Liu, “Experimental study on ultrasonic elliptical vibration cutting of hardened steel using PCD tools”, Journal of Materials Processing Technology, vol. 211, no. 11, pp. 1701–1709, 2011.
X. Zhang, K. Liu, and A. S. Kumar and M. Rahman, “A study of the diamond tool wear suppression mechanism in vibration-assisted machining of steel”, Journal of Materials Process Technology, vol. 214, no. 2, pp. 496–506, 2014.
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