砂布轮柔性抛光表面完整性关键表征参数研究

The surface integrity of aeroengine blades seriously affects the fatigue strength and service life of the blades. In order to master the key parameters of the surface integrity of the flexible polishing blade of abrasive cloth wheel, the polishing test and the surface integrity test of TC4 blade were carried out based on the polishing technology equipment of "NC machine + flexible grinding head + elastic grinding tool (abrasive cloth wheel) ". The changes of surface integrity parameters before and after polishing were compared, and the changes mechanism was analyzed, the results show that the flexible polishing of abrasive cloth wheel can obviously improve the surface roughness, surface micro-morphology, surface residual stress and surface micro-hardness, however, the residual stress in depth direction, microhardness in depth direction and microstructure were not affected. The results provide a basis for surface integrity control of abrasive cloth wheel.