Abstract
A study on the mechanism of serrated chip formation has been carried out. Characterization of serrated chip is performed using geometrical methods, including degree and frequency of segmentation, base angle, and bottom edge. Mechanical characterization such as micro-hardness is also adopted. Experiments of high-speed machining on three metallic materials including Ti6Al4V, hardened 1045 steel, and Al7050 are performed. The chips of the three metallic materials under different cutting speeds are collected during high-speed machining. After polishing, the serrated chip is observed under a digital microscope. The results show that the degree and frequency of segmentation increase with the cutting speed. Al7050 is most sensitive to these parameters. The hardened 1045 steel is similar to the titanium alloy Ti6Al4V. Both the base angle and the vertex angle decrease with the cutting speed. The specific geometry of serrated chip unit under certain cutting speed can be determined by using the geometric characterization parameters. The micro-hardness of the four vertices increases with the increase of cutting speed.
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References
Ai X (2003) Technology of high speed cutting. National Defense Industrial Press, Beijing
Atkins AG (2009) The science and engineering of cutting. Elsevier, Oxford
Dandekar CR, Shin YC (2012) Modeling of machining of composite materials: a review. Int J Mach Tools Manuf 57:102–121
Shaw MC, Vyas A (1993) Chip formation in the machining of hardened steel. CIRP Ann Manuf Technol 42:29–33
Komanduri R, Brown R (1981) On the mechanical of chip segmentation in machining. J Eng Ind 10(3):33–51
Smith S, Tlusty J (1997) Current trends in high-speed machining. J Manuf Sci Eng 119(4B):664–666
Yang Q, Liu Z, Wang B (2012) Characterization of chip formation during machining 1045 steel. Int J Adv Manuf Technol 63(9–12):881–886
Davies MA, Chou Y, Evans CJ (1996) On the chip morphology, tool wear and cutting mechanics in finish hard turning. CIRP Ann Manuf Technol 45(1):77–82
Turley DM, Doyle ED, Ramalingam S (1982) Calculation of shear strains in chip formation in titanium. Mater Sci Eng 55(1):45–48
Recht R F (1964) Catastrophic thermoplastic shear. J App Mech: 189–193
Lee D (1984) The nature of chip formation in orthogonal machining. J Eng Mater Technol 106(1):9–15
Lee D (1985) The effect of cutting speed on chip formation under orthogonal machining. J Eng Ind 107:55–63
Li G (2009) Prediction of adiabatic shear in high speed machining based on linear perturbation analysis. Dalian University of Technology, doctor degree
He N, Lee TC, Lau WS (2002) Assessment of deformation of shear localized chip in high speed machining. J Mater Process Technol 129(1–3):101–104
Duan CZ, Wang MJ, Pang JZ (2006) A calculational model of shear strain and strain rate within shear band in a serrated chip formed during high speed machining. J Mater Process Technol 178(1–3):274–277
Schulz H, Abele E (2001) Materials aspects of saw-tooth chip formation in HSC machining. CIRP Ann Manuf Technol 50(1):45–48
Yang Q, Liu Z, Shi Z, Wang B (2014) Analytical modeling of adiabatic shear band spacing for serrated chip in high-speed machining. Int J Adv Manuf Technol 71(9):1901–1908
Wang B, Liu Z (2014) Investigations on the chip formation mechanism and shear localization sensitivity of high-speed machining Ti6Al4V. Int J Adv Manuf Technol 75(5):1065–1076
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Yang, Q., Wu, Y., Liu, D. et al. Characteristics of serrated chip formation in high-speed machining of metallic materials. Int J Adv Manuf Technol 86, 1201–1206 (2016). https://doi.org/10.1007/s00170-015-8265-x
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DOI: https://doi.org/10.1007/s00170-015-8265-x