The design and analysis of a polypropylene hub CBN wheel to suppress grinding chatter

The research investigated the addition of flexibility into a CBN grinding w heel to suppress regenerative chatter, and illustrates some design features that should be present in such a wheel. Flexibility was added by replacing the hub of an aluminium-hub CBN grinding wheel with polypropylene, decreas ing the bulk stiffness of approximately 12 percent of its original value. E xperiments showed that the modified wheel met the design requirements and s uppressed chatter, but exhibited increased forced vibration at two frequenc ies. When the polypropylene between the flanges was replaced by an aluminum insert, one forced vibration disappeared. There is evidence that such a fl exible wheel with a homogeneous rim would outperform a standard aluminum hu b wheel.