Press-finishing, a plastic deformation process, can be applied to raise surface precision of a workpiece. This paper introduces a new press-finishing technique for PCD (polycrystal diamond)tool that can press finishin...Press-finishing, a plastic deformation process, can be applied to raise surface precision of a workpiece. This paper introduces a new press-finishing technique for PCD (polycrystal diamond)tool that can press finishing the residual feed trails produced by the diamond tool on the machined surface. The experiments of press-finishing of Al-alloy have been performed on an instrument lathe with the press-finishing set-up with a PCD tool. Having investigated the correlation between the surface roughness (Rα)and parameters, such as press-finishing speed (v), feed (f),depth of press (αpp), PCD sphere diameter (Dsph), rigidity coefficient of spring (Ki) etc, the optimum parameters of technology.and their laws for the press-finishing of Al-alloy have been acquired. Some mechanisms for the press-finishing of Al-alloy with a PCD tool have been discussed. With appropriate parameters chosen, the sample of Al-alloy could be press-finished to a value of Ra =0.026μm from an initial roughness of Ra =0.5μm.展开更多
文摘Press-finishing, a plastic deformation process, can be applied to raise surface precision of a workpiece. This paper introduces a new press-finishing technique for PCD (polycrystal diamond)tool that can press finishing the residual feed trails produced by the diamond tool on the machined surface. The experiments of press-finishing of Al-alloy have been performed on an instrument lathe with the press-finishing set-up with a PCD tool. Having investigated the correlation between the surface roughness (Rα)and parameters, such as press-finishing speed (v), feed (f),depth of press (αpp), PCD sphere diameter (Dsph), rigidity coefficient of spring (Ki) etc, the optimum parameters of technology.and their laws for the press-finishing of Al-alloy have been acquired. Some mechanisms for the press-finishing of Al-alloy with a PCD tool have been discussed. With appropriate parameters chosen, the sample of Al-alloy could be press-finished to a value of Ra =0.026μm from an initial roughness of Ra =0.5μm.
