Magnetic Abrasive Finishing of Thick Cylinder Tube Sus 304

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INTERNAL FINISHING OF THICK CYLINDER SUS 304 STEEL TUBES USING MAGNETIC ABRASIVE FINISHING SETUP

Abstract
Magnetic Abrasive Finishing (MAF) is an advanced finishing method, which improves the quality of surfaces and performance of the products. Surface is finished by removing the material in the form of microchips by abrasive particles in the presence of magnetic field. The material is removed in such a way that surface finishing and deburring are performed simultaneously with the applied magnetic field in the finishing zone. The mechanism of super finishing in any finishing process is widely focused by the knowledge of forces involved in the process. This paper deals with the detailed parametric study in super finishing of stainless steel SUS 304 thick steel tube. Statistically designed experiments based on Taguchi methods show that weight of abrasive, Revolutions per minute (rpm), magnetic abrasive diameter (Mesh No.) and finishing time have significant effect on the surface roughness obtained. Analysis of experimental data showed that change in surface roughness (ΔRa) was highly influenced by mesh number followed by percentage weight of abrasives, rpm of permanent magnet, and finishing time.

Key Words: Magnetic abrasive finishing (MAF), Design of experiments, Surface roughness.

1. Introduction

Fine surface finish is in high demand in a wide spectrum of industrial applications. An internal magnetic abrasive finishing process was proposed for producing highly finished inner surfaces of work pieces. It is difficult to finish advanced engineering materials with high accuracy, and minimal surface defects such as micro cracks, by conventional grinding and polishing techniques. To minimize the surface damage, gentle/flexible finishing conditions are required, namely, a low level of controlled force. Magnetic field assisted manufacturing processes are becoming effective in finishing, cleaning, deburring and burnishing of metal and advanced engineering



References: • Rahul S. Mulick, Pulak M. Pandey (2011), “Magnetic Abrasive Finishing of hardened AISI 52100 steel”, International Journal Advanced Manufacturing Technology, vol. 55, pp. 501-515. • A.C. Wang, S.J. Lee (2009), “Study the characteristics of magnetic finishing with gel abrasive”, International Journal of Machine Tools and Manufacture, vol. 49, pp. 1063-1069. • Ekkard Brinks Meier, Oltmann Riemer, Alexander Gessen Harter (2006), “ Finishing of structured surfaces by abrasive polishing”, Precision Engineering, vol.30, pp. 325-336. • Dhirendra K. Singh, V.K. Jain, V.Raghuram, R.Komanduri (2005), “Analysis of surface texture generated by a flexible magnetic abrasive brush wear”, vol.259, pp. 1254-1261. • Sekine M, Shinmura T and Yamaguchi H, (2005), “Uniform internal finishing of SUS304 Stainless steel bent tube using a magnetic abrasive finishing process”, ASME Journal of Manufacturing Science and Engg., vol.127, pp. 605-611. • Wang Y and Hu D, (2005) “Study of inner surface finishing of tubing by magnetic abrasive finishing”, International Journal of Machine Tools and Manufacture, vol.45, pp.1297-1303. • Shaohui Yin, Takeo Shinmura (2004), “Vertical vibration assisted magnetic abrasive finishing and deburring for magnesium alloy”, International Journal of Machine Tools and Manufacture, vol.44, pp. 1297-1303. • Jain V.K., Kumar P, Behra P.K., Jayswal S.C. (2001) “Effect of working gap and circumferential speed on the performance of magnetic abrasive finishing process”, Wear, Vol.250, pp.384-390. • Singh .L (2001), “An experimental study of magnetic abrasive finishing”, M.Tech Thesis, Mechanical Engineering Department, G.N.D.E.C., Ludhiana. • Hou ZB, Komandri R (1998), “Magnetic field assisted finishing of ceramics on the thermal aspect of magnetic abrasive finishing of ceramic rollers”, Trans ASME Journal of Engineering India, vol.20, pp. 660-667. • Kremen GZ, El Sayed EA, Ribeiro JL (1996), “Mechanism of material removal in magnetic abrasive process and the accuracy of machining”. Int J Prod Research, vol.34, no.9, pp.2629-2638.

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