A Study on the Effects of Milling Strategy on Surface Roughness

Year 2019, , 125 - 130, 22.03.2019

Ayhan Etyemez , Aziz Baran

https://doi.org/10.18466/cbayarfbe.492270

Abstract

In this study, DIN 1.2344 hot work steel which was hardened at 51 HRC hardness value was processed by using high-speed milling
technology, and different milling parameters with 6 mm-diameter spherical endmill and the surface qualities which were obtained as a result of milling were examined. Axial and radial feed values,
feed value per tooth and depth of cut were
changed between the range of 0.05 and 0.1 mm and the rate of cutting was
changed between the range of 485 rpm and
4,000 rpm. These millings were carried
out on material in the spherical form of which diameter was 21 mm, and the central angle was 150º. Also, milling
directions were processed in different
ways as climb milling, conventional milling and bidirectional milling in
experimental cuttings. Surface roughness was
examined in directions with 15º,
45º, 75º, 90º, 105º, 135º and 165º central
angles on the material which was processed.
The best surface quality was achieved in
regions with 15º and 45º angles

Keywords

High-speed milling, Surface quality, Milling strategy

References

• 1. Dewes, R.C., Aspinwall, D.K. 1996. A review of ultra highspeed milling of hardened steels. Journal of Materials Processing Technology; 69: 1-17.
• 2. Fallböhmer, P., Rodriguez, C. A., Özel. T., Altan, T. 2000. High-speed machining of cast iron and alloy steels for die and mold manufacturing. Journal of Materials Processing Technology; 98: 104-115.
• 3. Vorasri, M., Jirapattarasilp, K., Kaewkuekool, S. 2011. The effect of high-speed milling on surface roughness of hardened tool steel, World Academy of Science, Engineering and Technology; 59: 469-472.
• 4. Alam, S., Amin, A. N., Patwari, A. U. 2010. Surface texture investigation in high speed flat end milling of Ti-6Al-4V. International Conference on Industrial Engineering and Operations Management Dhaka, Bangladesh, January 9-10, 2010.
• 5. Urbanski, J. P., Koshy, P., Dewes, R. C., Aspinwall, D. K. 2000. High speed machining of moulds and dies for net shape manufacture. Materials and Design; 21: 395-402.
• 6. Toh, C. K. 2002. Surface topography analysis in high speed finish milling inclined hardened steel. Precision Engineering; 28: 386-398.
• 7. Axinte, D. A., Dewes, R. C. 2002. Surface integrity of hot work tool steel after high speed milling-experimental data and empirical models. Journal of Material Processing Technology; 127: 325-335.
• 8. Kasim, M. S., Che Haron, C. H., Ghani, J.A., Sulaiman, M.A. 2013. Prediction surface roughness in high-speed milling of inconel 718 under mql using rsm method. Middle-East Journal of Scientific Research; 13 (3): 264-272.
• 9. Thangarasu, V. S., Sivasubramanian, R. 2012. High speed cnc machining of AISI 304 stainless steel; optimization of process parameters. International Journal of Mechanical Engineering and Robotics Research; 1 (3): 9-21.
• 10. Baran, A. 2006. Sertleştirilmiş Kalıp Çeliklerinin Yüksek Hızda İşlenmesinde Uygun Kesme Parametrelerinin Seçimi. M. Ü. F. B. E. Yüksek Lisans Tezi.
• 11. Yang Z., Xue Y., Li Y. Xu J., Wang Q. 2018. The effect of milling parameters on surface integrity in high-speed milling of ultrahigh strength steel. Procedia CIRP; 71:83-88
• 12. Schulz, H., Moriwaki, T. 1992. High speed machining. Ann. CIRP; 41(2):637- 643.
• 13. Nakagawa, T., 1992. Emerging new technologies in milling. 7th International Conference of Tool, Die and Mold Industry International Special Tooling Association, Bergamo, Italy;85
• 14. Kauppinen, V., Paro J., Nieminen I. Application of high-speed milling to the finish manufacturing industry. Helsinki University of Technology, Technical Research Center of Finland, Espoo, Finland, 1993, pp 83.
• 15. Eversheim, W., König, W., Bieker, R., Cobanoglu, M. 1989. Nc – frasbearbeitung on vergüteten schmiedegesenken. Technology & Engineering; 86: 99-103
• 16. Field, M., Kahles, J. F., Koster, W. P. Surface Finish and Surface Integrity. ASM Handbook, Metcut Research Associates Inc., USA, 1980; pp 18 – 87.
• 17. Vivancos, J., Luis, C.J., Costa, L., Ortiz, J.A. 2004. Optimal Machining Parameters Selection in High Speed Milling of Hardened Steels for Injection Molds. Journal of Material Processing Technology; pp 155-156:1505-1512.