Papers by Keyword: Flotative Abrasive Ball

Abstract: Polishing with Flotative Abrasive Balls(FABs) is a kind of soft contact polishing means， and the conventional polishing plate and pad are not needed in this case. The pressure of polishing is the flotage which is the upward force that a fluid exerts on the FABs, but the movement of work piece is similar to that in conventional polishing, the removal rate and quality of polishing is influenced by FAB and its flotage. An experiment device is built up and two kinds of FAB are designed and produced. Some primary experiments are carried out in order to investigate the influences of the size of FABs on the removal rate and surface roughness in polishing with FABs. It is found from the experiments that the grain size and the layers of FAB may have great influence on the removal rate of polishing; the surface roughness is mainly decided by the ball diameter and the layers of FAB. The results of experiments are discussed and analyzed, it indicates that the efficiency and quality depend on flotage and the number of active grains when the velocity of workpiece is assigned.

Abstract: The grain size and its identity of abrasives are of high importance to obtain the damage-free and low roughness surfaces in traditional polishing processes. The undesirable scratches will appear on the surface of workpiece, if the grain size of abrasives is of high decentralization, or some abnormal larger grains or impurities are interfused in polishing process. And it is very difficult to polish curved surfaces. A new polishing technology, which is called as polishing with flotative abrasive balls, is put forward in this paper, in order to solve the problems mentioned above. Some primary experiments and theoretical analyses are carried out. It is found that the contact pressure between workpiece and abrasive grains may be easily controlled, as a result, the depth of cutting may also be easily controlled and it is not sensitive to the grain size of abrasives. The new technology may also be used in the polishing of curved surfaces.