Design of hyperbolic profile grinding wheels manufactured with vitrified cBN segments for advanced manufacturing applications

The design of hyperbolic profile grinding wheels operating at peripheral speeds up to 250 m/s is described in detail. The wheels considered here are segmented with vitrified bonded cubic boron nitride abrasive (cBN) structures and attached to a variety of reinforced centre materials using a high-strength adhesive bond. The simulation of stresses at various speeds is conducted using a finite element analysis compared to closed-form solutions. Safety factors are calculated using analytical stress predictions and experimental strength measurements assuming that the segments bonded to the reinforcing centre section that is not constrained by radial motion. The paper shows that beyond peripheral speeds of 190 m/s, carbon fibre epoxy with a 15 degrees ply is the only material that can guarantee the industry standard of a safety factor of three at such high operating speeds.