Numerical Modeling of Minimum Uncut Chip Thickness for Micromachining with Different Work Materials

Abstract:

The determination of the minimum uncut chip thickness is essential in micro machining in order to achieve desired surface integrity and accuracy. The parameters being considered in determination the minimum uncut chip thickness include the cutting tool geometry, workpiece material, cutting parameters and so on. In this paper, five different materials including OFHC Copper, Al 7050, AISI 4340, Ti-6Al-4V and IN 718 with unequal materials’ properties were investigated to find materials parameters’ effect on the minimum uncut chip thickness. An Arbitrary Lagrangian Eulerian (ALE)-based numerical modeling is proposed to determine the minimum uncut chip thickness for the five different materials by changing depth-of-cut. The Johnson-Cook (J-C) constitutive model is employed to describe the work material behavior. Results show that the flow stress of different materials has significant effect on the minimum uncut chip thickness.

• Periodical: Materials Science Forum (Volumes 800-801)
• Pages: 402-407
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.800-801.402
• Online since: July 2014
• Authors: Lu Ning Liu*, Zhen Yu Shi, Zhan Qiang Liu
• Keywords: ALE, Finite Edge Radius Tools, Minimum Uncut Chip Thickness, Time Criterion

References

[1] Information on http: /www. micromanufacturing. net/didactico/Desarollo/micromilling/1-7-process-cutting-differences-between-macro-and-micro-world/7-2-minimum-chip-thickness.

[2] N. Ikawa, S. Shimada, H. Tanaka, Minimum thickness of cut in micromachining, Nanotechnology. 3(1992) 6-9.

DOI: 10.1088/0957-4484/3/1/002

[3] K. Lee, D.A. Dornfeld, Micro-burr formation and minimization through process control, Precision Engineering. 29(2005) 246-252.

DOI: 10.1016/j.precisioneng.2004.09.002

[4] K. Lee, D.A. Dornfeld, An Experimental Study on Burr Formation in Micro Milling Aluminum and Copper, Trans. NAMRI/SME. 30(2002)255–262.

[5] M.P. Vogler, R.E. Devor, S.G. Kapoor, On the modeling and analysis of machining performance in micro-endmilling, part I: surface generation, ASME J. Manuf. Sci. Eng. 126(2004)685-694.

DOI: 10.1115/1.1813470

[6] H. Weule, V Huntrup, H. Tritschle, Micro-cutting of steel to meet new requirements in miniaturization, CIRP Ann. 50(2001)61-64.

DOI: 10.1016/s0007-8506(07)62071-x

[7] X. Liu, R.E. Devor, S.G. Kapoor, An analytical model for the prediction of minimum chip thickness in micromachining, Transaction of the ASME. 128(2006)474-481.

DOI: 10.1115/1.2162905

[8] Z.J. Yuan, M. Zhou, S. Dong: Journal of Materials Processing Technology. 62(1996)327-330.

[9] X.M. Lai, H.T. Li, C.F. Li, Z.Q. Lin, J. Ni, Effect of diamond tool sharpness on minimum cutting thickness and cutting surface integrity in ultraprecision machining, International Journal of Machine Tools & Manufacture. 48(2008)1-14.

DOI: 10.1016/s0924-0136(96)02429-6

[10] P.K. Basuray, B.K. Misra, G.K. LAL, Transition from ploughing to cutting during machining with blunt tools, Wear. 43(1977)341-349.

DOI: 10.1016/0043-1648(77)90130-2