Study on the application of non -Newton fluid in curved surface polishing

Abstract

Traditionally, the curved surfaces are generated by a complicated machining process to achieve the required surface quality. To simplify this process, the abrasive will be mixed with the binder to become a polishing slurry. This slurry does not obey the Newton laws when it moves. This process will produce the shear stress for the slurry on the machining surface. Based on the non-Newton fluid, the curved surface will be machined by a simple machining process. In this paper, the effects of grinding speed, slurry concentration and abrasive size on the surface roughness are discussed. The experimental results show that the polishing speed has an obvious influence on surface finishing. With the increase of the polishing speed, the surface roughness reduces. In addition, the slurry concentration also affects the surface quality like the polishing speed. The abrasive size has a small effect on the surface finishing. The surface roughness of steel spherical workpiece Ø40 mm is reduced sharply from Ra = 130 nm to Ra = 23 nm after treatment.