Continuous multi-angle variation (CMAV) for faster roundness correction in centreless grinding

This paper presents a new methodology to improve roundness process of the centreless grinding based on classic stability diagrams and relative rounding mechanism. This study has shown that it is not always convenient to have a fixed setup angle. Based on simulation results, it is suggested to consider the raw workpiece profile before selecting these parameters accordingly to the type of raw workpiece roundness error (odd or even lobed). It was found that changing the setup angles from an initial appropriate point to a final point results in better simulated and experimented roundness. This changing was simulated with two methods, continuous and multistep, but the best results were achieved by the first one. Furthermore, a new support blade design for through feed centreless grinding is presented for application of the above-mentioned method.