Abstract
Tool orientation has an important effect on the surface quality of a free-form surface during ball end milling process, and the selection of tool orientation is important to ensure the surface quality. In this work, a series of milling experiments were performed by using a carbide ball end mill on a workpiece of TC17 titanium alloy. The purpose of this study was to determine the tool orientation producing optimal surface integrity. The results showed that the surface roughness in both directions was better when the rotational angle was within the range of 0°~90° and with a constant inclination angle. In addition, inclination angle had little effect on the roughness in the feed direction, whereas a much larger or smaller angle led to greater roughness in the step direction. The tool orientation strongly affected the surface morphology. Compressive residual stress was detected on all machined surfaces. The maximum surface residual stress was obtained when the rotational angle was 90°, and the surface residual stress decreased as the inclination angle increased. On this basis, four curved surface models with different curvatures were established according to the features of a blade, and the effects of inclination angle and cutter path orientation on surface integrity were studied. The results indicated that the surface roughness produced with an upward orientation varied more than that produced with a downward orientation for a steep curved surface; the value of the roughness was small for a horizontal orientation and when the machine surface was very smooth. The machined surface for a flat curved surface was smoother, and there were no obvious differences in surface morphology between the two cutter path orientations. For steep curved surfaces, the cutter path orientation had no obvious influence on the residual stress, and a greater value was obtained when the surface was much steeper. For flat curved surfaces, the residual stress had no obvious variation resulting from small changes of the inclination angle.
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Yao CF, Wu DX, Ma LF, Tan L, Zhou Z, Zhang JY (2016) Surface integrity evolution and fatigue evaluation after milling mode, shot-peening and polishing mode for TB6 titanium alloy. Appl Surf Sci 387:1257–1264
Toh CK (2006) Cutter path orientations when high-speed finish milling inclined hardened steel. Int J Adv Manuf Technol 27(5–6):473–480
Gani EA, Kruth JP, Vanherck P, Lauwers B (1997) A geometrical model of the cut in five-axis milling accounting for the influence of tool orientation. Int J Adv Manuf Technol 13(10):677–684
Chen XX, Zhao J, Dong YW, Han SG, Li AH, Wang D (2013) Effects of inclination angles on geometrical features of machined surface in five-axis milling. Int J Adv Manuf Technol 65(9–12):1721–1733
Chen XX, Zhao J, Dong YW, Li AH, Wang D (2014) Research on the machined surface integrity under combination of various inclination angles in multi-axis ball end milling. Proc IMechE Part B: J Eng Manuf 228(1):31–50
Daymin A, Boujelbene M, Ben Amara A, Bayraktar E, Katundi D (2011) Surface integrity in high speed end milling of titanium alloy Ti-6Al-4V. Mater Sci Tech Ser 27(1):387–394
Ko TJ, Kim HS, Lee SS (2001) Selection of the machining inclination angle in high-speed ball end milling. Int J Adv Manuf Technol 17(3):163–170
Aspinwall DK, Dewes RC, Ng EG, Sage C, Soo SL (2007) The influence of cutter orientation and workpiece angle on machinability when high-speed milling Inconel 718 under finishing. Int J Mach Tools Manuf 47(12–13):1839–1846
Kalvoda T, Hwang YR (2009) Impact of various ball cutter tool positions on the surface integrity of low carbon steel. Mater Design 30(9):3360–3366
Lim TS, Lee CM, Kim SW, Lee DW (2002) Evaluation of cutter orientations in 5-axis high speed milling of turbine blade. J Mater Process Technol 130(1):401–406
Zhao HW, Zhang S, Wang GQ, Zhao B (2013) Effect of machining inclination angle of ball-nose end mill on surface topography. Comput Integr Manuf Syst 19(10):2438–2444
Cheng SY, Xiong HW, Zhang XW (2002) The physics-based manifold modeling method for free-form surface design. Journal of Chongqing University 01:70–73
Chen L, Qin DT, Zheng XG (2002) Free-form surface modeling based on shape characteristics in reverse engineering. Journal of Mechanical Engineering 38(11):105–108
Erdim H, Lazoglu I, Ozturk B (2006) Feedrate scheduling strategies for free-form surfaces. Int J Mach Tools Manuf 46(7–8):747–757
Manav C, Bank HS, Lazoglu I (2014) Intelligent toolpath selection via multi-criteria optimization in complex sculptured surface milling. J Intell Manuf 24(2):349–355
Rao A, Sarma R (2000) On local gouging in five-axis sculptured surface machining using flat-end tools. Comput Aided Des 32(7):409–420
Krimpenis A, Fousekis A, Vosniakos G (2005) Assessment of sculptured surface milling strategies using design of experiments. Int J Adv Manuf Technol 25(5–6):444–453
Zhou ZX, Zhou QY, Ren YH (2010) Current research and development trends of complex surface machining technology. Journal of Mechanical Engineering 46(17):105–113
Ali L, Xue D, Peihua G (2010) Recent development in CNC machining of freeform surfaces: a state-of-the-art review. Comput Aided Des 42(7):641–654
Lavernhe S, Quinsat Y, Lartigue C (2010) Model for the prediction of 3D surface topography in 5-axis milling. Int J Adv Manuf Technol 51(9):915–924
Xie J, Zou MS, Cui XL (2009) Effect of curvature distribution feature of complex free-form surface on CNC milling performance. Journal of Mechanical Engineering 45(11):158–162
Scandiffio I, Diniz AE, de Souza AF (2016) Evaluating surface roughness, tool life, and machining force when milling free-form shapes on hardened AISI D6 steel. Int J Adv Manuf Technol 82(9–12):2075–2086
de Souza AF, Diniz AE, Rodrigues AR, Coelho RT (2014) Investigating the cutting phenomena in free-form milling using a ball-end cutting tool for die and mold manufacturing. Int J Adv Manuf Technol 71(9–12):1565–1577
Durakbasa MN, Osanna PH, Demircioglu P (2011) The factors affecting surface roughness measurements of the machined flat and spherical surface structures-the geometry and the precision of the surface. Measurement 44(10):1986–1999
Tan L, Yao CF, Ren JX, Zhang DH (2017) Effect of cutter path orientations on cutting forces, tool wear, and surface integrity when ball end milling TC17. Int J Adv Manuf Technol 88:2589–2602
Tan L, Zhang DH, Yao CF, Wu DX, Zhang JY (2017) Evolution and empirical modeling of compressive residual stress profile after milling, polishing and shot peening for TC17 alloy. J Manuf Process 26:155–165
Yang P, Yao CF, Xie SH, Zhang DH, Dou XT (2016) Effect of tool orientation on surface integrity during ball end milling of titanium alloy TC17. Procedia CIRP 56:143–148
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Yao, C., Tan, L., Yang, P. et al. Effects of tool orientation and surface curvature on surface integrity in ball end milling of TC17. Int J Adv Manuf Technol 94, 1699–1710 (2018). https://doi.org/10.1007/s00170-017-0523-7
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DOI: https://doi.org/10.1007/s00170-017-0523-7