Abstract：Aiming at the overheating and low machining efficiency problems in grinding superalloys, an internal cooling grinding wheel with a replaceable abrasive ring is proposed. To improve the flow characteristic and heat transfer performance of fluid in the grinding arc zone, surface structure of the ring and the internal flow channel outlet shape are designed based on the sunflower seed phyllotaxis configuration model. The flow field distribution model in grinding arc zone is established based on the computational fluid dynamics (CFD) method, finally the grinding tests of superalloy are carried out. Results indicate that abrasive cluster of phyllotaxis configuration leads to enhanced flow and cooling characteristics, compared with the circular flow channel, better cooling and lubrication effects are obtained by the rectangular flow channel, and the heat exchange efficiency is more remarkable as the grinding speed increases. Average grinding temperature and surface roughness of the workpiece are reduced by 24.12% and 18.50% respectively, and the machined surface morphology is smoother and more regular.
2022, 
