WHAT IS THE PRINCIPLE OF ROLLER BURNISHING PROCESS ?
Roller Burnishing is a cold working process which produces a fine surface finish by the planetary rotation of hardened roils over a bored or turned metal surface. Roller Burnishing involves cold working the surface of the workpiece to improve surface structure. In the burnishing process, the pressure generated by the rolls exceeds the yield point of the softer piece part surface at the point of contact, resulting a small plastic deformation of the surface structure of the piece part. Since all machined surfaces consist of a series of peaks and valleys of irregular height and spacing, the plastic deformation created by roller burnishing is a displacement of the material in the peaks which cold flows under pressure into the valleys. The result is a mirror-like finish with a tough, work hardened,wear and corrosion resistant surface. The roller burnishing pressure required depends on number of factors like ductility and tensile strength of the material, surface roughness before and after r
