INFLUENCE OF ABRASIVES ON SURFACE ROUGHNESS IN ROLLER BURNISHING PROCESS
PAVANA KUMARA *
Department of Mechanical Engineering, Shri Madhwa Vadiraja Institute of Technology & Management, Bantakal-574115, Udupi, India.
G. K. PUROHIT
Department of Mechanical Engineering, PDA College of Engineering Aiwan-E-Shahi, Gulbarga-585103, India.
*Author to whom correspondence should be addressed.
Abstract
Roller burnishing carried out on cylindrical components of EN24 grade steel in presence of fine silicon carbide abrasive particles (in the form of a paste) to study the effect on surface roughness. Factorial designs with four parameters viz., burnishing force, speed, feed and the number of passes are used to develop Mathematical models for dry and ‘with-paste’ roller burnishing. The surface roughness tests indicate that the ‘with-paste’ roller burnishing reduced the surface roughness a greater extent as compared with dry roller burnishing. The lowest roughness value noted was 0.1843 µm when roller burnishing was conducted with 35 Kgf, 770 rpm, 0.049mm/rev and three passes of the tool over the workpiece.
Keywords: Machining, burnishing, abrasive paste, surface finish, factorial design