Machinability Study Using Chip Thickness Ratio on Difficult to Cut Metals by CBN Cutting Tool

Abstract:

Article Preview

Machinability is the one of the criteria in determining the life of the cutting tool. In this experiment, hard and difficult to cut materials like hard AISI 440 C stainless steel and hard SCM 440 alloy steels were discussed. However, machinability of the material is considered to be poor due to its inherent characteristics. The machinability studies on AISI 440 C stainless steel and SCM 440 alloy steels had not been carried out by researchers. Machinability indices used in such cases have the characteristics such as cutting force, surface roughness, tool wear etc. In the case of high-speed machining of said materials machinability indices such as chip thickness (RC), shear angle (Ф), surface integrity, and chip analysis are of prime importance. Most of the researchers have not given due consideration to these vital machinability indices necessary for understanding of high-speed cutting of said materials. In this work, an experimental investigation was carried out to understand the behavior of difficult to cut materials, when machined with Cubic Boron Nitride (CBN) insert tool. The results and analysis of this work indicated that the above-mentioned machinability indices are important and necessary to assess the machinability of said materials effectively. The operating parameters used were cutting velocity 100, 125, 150, 175 and 200 m/min with feed rate of 0.10, 0.20 and 0.30 mm rev-1 with constant depth of cut of 1.0 mm. The length of turning was 150 mm and 300 mm. Machinability of both materials and tool was evaluated in terms of roughness, flank wear, cutting force, chip thickness ratio and shear angle.

Info:

Periodical:

Key Engineering Materials (Volumes 504-506)

Edited by:

M. Merklein and H. Hagenah

Pages:

1317-1322

Citation:

S. Thamizhmanii and H. Sulaiman, "Machinability Study Using Chip Thickness Ratio on Difficult to Cut Metals by CBN Cutting Tool", Key Engineering Materials, Vols. 504-506, pp. 1317-1322, 2012

Online since:

February 2012

Export:

Price:

$41.00

[1] Attanasion, A. Gelfi, M. Giardini, C and Remino, C, Minimum quantity lubrication in turning: Effect on tool wear, Wear, 260, 2006, 333-338.

DOI: https://doi.org/10.1016/j.wear.2005.04.024

[2] Senthikumar, A. Rajadurai, A and Sornakumar, T., The effect of tool wear on tool life of alumina based ceramic cutting tools while machining hardened stainless steel, Journal of Materials Processing Technology, 173, 2006, 151-156.

DOI: https://doi.org/10.1016/j.jmatprotec.2005.11.012

[3] Liew, WY. H, Ngoi, B.K.A. and Lu, Y.G., Wear characteristics of PCBN tools in the ultra precision machining of stainless steel at low cutting speeds, wear, 254, 2003, 265-277.

DOI: https://doi.org/10.1016/s0043-1648(03)00002-4

[4] Poulachon, G. Bandayopadhya, B.P. AND Jawhir, I. S, Pheulpin,S. and Senguin, E., The influence of the micro-structure of hardened tool steel work piece on the wear of PCBN cutting tools, International Journal of Machine Tools and Manufacture 43, 2003, pp.139-144.

DOI: https://doi.org/10.1016/s0890-6955(02)00170-0

[5] More, A. Wenping Jiang and Brown, W.D. and Ajay P. Malshe., Tool wear and machining performance of CBN-TiN coated carbide inserts and PCBN compact inserts in turning AISI 4340 hardened steel, Journal of Materials Processing Technology, 180, 2006, Issue 1-3, pp.253-262.

DOI: https://doi.org/10.1016/j.jmatprotec.2006.06.013

[6] D.G. Thakur, B. Ramamoorthy and L. Vijayaraghavan, Machinability investigation of Inconel 718 in high speed turning, International Journal of Advanced Manufacturing Technology (2009), 45: 421-429, doi: 10. 1007/s00170-009-1987-x.

DOI: https://doi.org/10.1007/s00170-009-1987-x

[7] N.A. Abukhshim, P.T. Matinvenga, and M.A. Sheikh, Investigation of heat partition in high speed turning of high strength alloy steel. International Journal of Machine Tools and Manufacture, 45, (2005), 1687-1695.

DOI: https://doi.org/10.1016/j.ijmachtools.2005.03.008

[8] Paulo Davim J, Mata Francisco, A comparative evaluation of the turning of reinforced and unreinforced polyamide. Int J AdvManuf Technol 33: 2007, 911–914.

DOI: https://doi.org/10.1007/s00170-006-0520-8

[9] Haci Saglam, Faruk Unsacar and Suleyman Yaldiz, Investigation of the effect of rake angle and approaching angle on main cutting force and tool tip temperature, International Journal of Machine Tools and Manufacture, 46, 2006, 132-141.

DOI: https://doi.org/10.1016/j.ijmachtools.2005.05.002