Investigation the effects of Dressing and Truing of grinding wheel on surface quality and grinding accuracy of chrome-molybdenum steel rolls in cylindrical grinding process

Grinding is one of the final processes on the ground part that improves surface quality. Grinding wheel must be sharpened before surface quality damaged. Dressing parameters must be well adjusted in order to achieve the best conditions of grinding wheel surface. In the present research an experimental study has been performed to analyze effect of dressing parameters on surface quality of chrome-molybdenum rolls. Firstly, dressing was performed on grinding wheel and topography of wheel, wheel surface quality and surface quality of ground part were compared before and after grinding process. Further, a parameters study was carried out to determine the effects of dressing speed, feed rate and dressing depth on the surface roughness of the ground part. Here, 20 experiments were designed by use of central composite design and response surface methodology to determine effects of parameters on the final surface roughness and also identify optimal parameters. In the parameters study obtained results indicated that in minimum dressing feed rate and in minimum dressing depth and in maximum dressing speed are the most effective parameters among process parameters. Finally, the desirability approach function has been used to optimize surface roughness simultaneously.