International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395 -0056
Volume: 04 Issue: 04 | Apr -2017
p-ISSN: 2395-0072
www.irjet.net
AN EXPERIMENTAL INVESTIGATION AND OPTIMIZATION OF PROCESS PARAMETERS OF ROLLER BURNISHING Lad S.P.1, Shirke P.R.2, Lohar A.B.3, Kulye P.D.4,Khandekar S.B.5 1Student
of B.E., Mechanical Engineering, Rajendra Mane College of Engineering and Technology, Devrukh, Maharashtra, India. 2Student of B.E., Mechanical Engineering, Rajendra Mane College of Engineering and Technology, Devrukh, Maharashtra, India. 3Student of B.E., Mechanical Engineering, Rajendra Mane College of Engineering and Technology, Devrukh, Maharashtra, India. 4Student of B.E., Mechanical Engineering, Rajendra Mane College of Engineering and Technology, Devrukh, Maharashtra, India. 5Assistant Professor, Mechanical Engineering, Rajendra Mane College of Engineering and Technology, Devrukh, Maharashtra, India. ---------------------------------------------------------------------***---------------------------------------------------------------------
Abstract - Roller burnishing is the process of surface
modification in which, a hard roller is pressed against a rotating cylindrical work piece and parallel to axis of the work piece. The main objective of this study is to enhance the surface roughness and surface hardness of the EN-8 specimen using the roller burnishing process. This research work involves experimental investigation of roller burnishing process with regard to process parameters such as speed, feed, and number of passes. The EN-8 steel work piece material and H.S.S. single roller burnishing tool is used for carrying out this research work. The process parameters considered are speed (1000 R.P.M., 1200 R.P.M., 1400 R.P.M.), feed (0.08mm/rev, 0.1mm/rev, 0.12 mm/rev) and number of passes(2, 3, 4). Effect of these parameters on response variables such as surface roughness and surface hardness is characterized by DOE. Results shows that dominating factor affecting surface roughness is speed and that of for surface hardness is number of passes. From this study, it is observed that the better surface finish up to 0.26 micron is obtained and also hardness is improved by 20% and increased up to 254 BHN. Key Words: Roller burnishing, Surface roughness, Surface hardness, DOE, Burnishing speed, feed and number of passes.
1. INTRODUCTION Burnishing process is use for the surface modification which gives a very fine surface finish by the planetary rotation of a roller over a cylindrical surface. The tool may consist of one or more ball or roller. There is no removal of material from the work pieces. All machined or other processed metal surfaces consist of a series of peaks and valleys which constitute the surface irregularities. Due to the applied burnishing force peaks of the roughness flows into the valleys. This reduces the height of the peaks and depth of the valleys, thereby reducing the surface roughness. Š 2017, IRJET
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Burnishing process can be done by two ways, Roller burnishing process and Ball burnishing process. The ball material is hardened alloy steel, carbide, diamond, etc. The roller material is hardened alloy steel, carbide, etc. In this paper, experiments with roller burnishing tool are presented. The schematic diagram shows the operating principle of roller burnishing process.
Fig -1: Schematic diagram of roller burnishing process Using roller burnishing process time and cost of finishing operation can be reduced by eliminating secondary operation like honing, lapping grinding etc. while at the same time improving the quality of the product. Roller burnishing process also improves wear resistance property of finished surface. Hardened and highly polished steel roller is pressed against the EN-8 work piece; the surface is plastically deformed as the pressure exceeds the yield point of the work piece material.
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