Cutting Tool Run out Considered Cutting Force Estimation in Micro Milling Processes

Abstract:

This paper presents a method of estimating cutting forces of the tool by taking the tool’s run out into account during micro milling processes. The thickness of uncut chip is modelled based on the trochoidal trajectory synthesized from the rotational motion, the feed motion, and the run out of rotational micro tools. The strain gradient plasticity theory is then used in conjunction with the Johnson–Cook constitutive equation to calculate flow stresses, where the influence of the plough shear on the rake face and the elastic recovery on the flank face is considered. The calculated cutting forces using the proposed method for micro milling processes show a satisfactory agreement with existing experimental results.

• Periodical: Applied Mechanics and Materials (Volumes 670-671)
• Pages: 490-496
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.670-671.490
• Online since: October 2014
• Authors: Jian Cheng Liu, Yu Long Su, Zhi Guo Dong, Gang Ya
• Keywords: Cutting Force, Johnson–Cook (JC) Constitutive Equation, Micro Milling, Run-out

References

[1] W. Johnson, Cutting with tools having a rounded edge–some theoretical considerations, CIRP Annals, 1997, 14(5): 315-319.

[2] R.N. Roth, P.L.B. Oxley. Slip line field analysis for orthogonal machining based upon experimental flow fields[J], Journal of Mechanical Engineering Science, 1972, 14(2): 85-97.

DOI: 10.1243/jmes_jour_1972_014_015_02

[3] Li Hongtao, Mechanism Studies and Process Optimization of Meso Scale Milling Process Thesis, Shanghai: School of Mechanical Engineering, Shanghai Jiao Tong University (2008).

[4] W. Y. Bao, I.N. Tansel. Micro-end-milling operation. Part I: analytical cutting force model[J]. Int. J. Mach. Tools Manuf. 2004, 40(15): 2155~2175.

DOI: 10.1016/s0890-6955(00)00054-7

[5] Zhao Yan, Processing Foundation and Experiments in Micro-Milling[PhD Thesis]. Harbin: School of Mechatronics Engineering, Harbin Institute of Technology, (2008).

[6] Mohammad Malekiana, Simon S, B.G. Jun，Modelling of dynamic micro-milling cutting forces[J] ，International Journal of Machine Tools & Manufacture, 2009, 49(7): 586–598.

DOI: 10.1016/j.ijmachtools.2009.02.006

[7] Hye-Ri Gye, Byeong-Uk Song, Yong-Seok Lim, Yong-Wook Shin, Sung-Hui Jang, and Tae-Il Seo, Prediction of Cutting Force and Tool Deflection in Micro Flat End Milling[J], International Journal of Materials, Mechanics and Manufacturing, 2013, 1(1): 13-16.

DOI: 10.7763/ijmmm.2013.v1.3

[8] Wu Jihua, Deformation in Micro-Cutting Based on Strain Gradient Plasticity Theory[PhD]. Jinan: School of Mechanical Engineering, Shandong University, (2009).

[9] W.Y. Bao, I.N. Tansel . Modelling micro-end-milling operations. Part II: tool run-out [J] International Journal of Machine Tools & Manufacture, 2000, 40(15): 2175–2192.

DOI: 10.1016/s0890-6955(00)00055-9

[10] X. Liu, M. B. Jun, R.E. Devor. Cutting Mechanics and their influence on dynamic forces, vibrations and stability in micro-end-milling [J]. Proc. of ASME Manufacturing Engineering Div, Anaheim. 2004, 15(2): 583– 592.

DOI: 10.1115/imece2004-62416

[11] S.P.F.C. Jaspersa, *, J.H. Dautzenbergb. Material behaviour in conditions similar to metal cutting: flow stress in the primary shear zone[J]. Journal of Materials Processing Technology 2002, (122): 322~330.

DOI: 10.1016/s0924-0136(01)01228-6

[12] Yan Hongzhi, Gong Lijun. Constitutive model material[J]. Journal of Central South University(Science and Technology), 2012，43(11): 4268-4273.

[13] Xinmin Lai, Hongtao Li, Chengfeng Li, Zhongqin Lin, Jun Ni. Modelling and analysis of micro scale milling considering size effect, micro cutter edge radius and minimum chip thickness[J], International Journal of Machine Tools & Manufacture, 2008, 48(1) : 1–14.

DOI: 10.1016/j.ijmachtools.2007.08.011

[14] D. Tabor. The hardness of metals[M]. Oxford: Oxford University press, (2000).

[15] V. Jardret, H. Zahouani, J. L. Loubet. Understanding and quantification of elastic and plastic deformation during scratch test [J]. Wear, 1998, 218(1): 8-14.

DOI: 10.1016/s0043-1648(98)00200-2

[16] C. Zhou, Jiancheng Liu, A. Avila, Experimental Investigation of Mechanical Micro Machining for AL6061-T6 Material, Applied Mechanical and Material Vols. 217-219 (2-12) pp.1880-1994, (2012).

DOI: 10.4028/www.scientific.net/amm.217-219.1880

[17] C. Zhou, Jiancheng Liu, Simulation and Experimental Study on Size Effect in Steel Micro Milling Machining Process, Advanced Materials Research Vols. 602-604 (2013) pp.2021-2026, (2012).

DOI: 10.4028/www.scientific.net/amr.602-604.2021