Improving surface quality of AA 6351 by the stiffburnishing technique

Burnishing process is used as a surface treatment for increasing the surface quality of circular or flat surfaces. the present paper investigates the effect of different burnishing parameters (speed,feed,depth of penetration and number of passes) on the surface quality of aa 6351. in conventional flexible burnishing tool,when the ball or roller is pressed against the material,gives waviness on the surface of the component,as properties of material throughout the length of the component are not uniform. proposed stiffroller burnishing tool (specially designed for cnc lathe) can avoid these effects due to its high stiffness. experimental work based on response surface methodology (rsm),using central composite design was carried out. statistical analysis of the results shows that the depth of penetration has a substantial effect on surface roughness and depth of penetration,speed and number of passes has significant effect on microhardness. optimization of burnishing parameters was done to minimize surface roughness and maximize surface hardness using desirability function. experiments were performed using optimum level of parameters to prove the effectiveness of desirability function and validate the phenomenon. © 2016 jordan journal of mechanical and industrial engineering.