Burnishing is a chipless finishing method, which employs a rolling tool, pressed against the workpiece, in order to achieve plastic deformation of the surface layer.
A new burnishing tool was introduced in this investigation which enables both single and double ball burnishing process in site after turning without releasing the workpiece. Effect of burnishing parameters which are burnishing feed, burnishing speed, and burnishing force upon final surface texture (roughness and roundness) were demonstrated.
Burnishing results showed significant effectiveness of the burnishing tool in the process. The surface roughness and roundness error of the turned test specimens were improved by burnishing. For the treated material in this investigation, the best results of surface roughness and roundness error were obtained with both single and double ball burnishing with a burnishing force of 170N. The minimum surface roughness was obtained at a feed rate 0.11 mm/rev. and a speed of 60.3 m/min. The smaller roundness error also can be achieved by using burnishing speeds ranging between 60.3 to 85.7 m/min. with a burnishing feed of 0.11 mm/rev. The results of double ball burnishing were better than that of single ball burnishing.
|
