Basic parameters effect of treatment process on intricate-shaped parts' surfaces roughness

The article presents the particular surface treatment of complex profile parts with loose abrasives. In previous studies we have defined ranges of pressure abrasive onto the surface, and the cutting speed at which high productivity and quality of the processing are obtained, and scrapping of details due to overheating is eliminated. Researches of such de© Скрябин В. A., 2015 tails as disks and cams were carried out in a test unit, which is fixed on a table of a vertical drilling machine or radial drilling machine and connected to its stem. The workpiece for such research is fixed on a special holder, which is mounted on the rotor shaft. Lead balls allow moving the mandrel axis relatively to the hinge axis of the rotor. The rotor is placed in a chamber with elastic walls filled with abrasive medium and imparts a rotation with a certain angular velocity. The annular chamber cavity supplied with air under pressure, as a result of which the medium is condensed, and the chamber communicates rotational movement through a gear. In addition, it performs a reciprocating motion along the rotation axis, moving relative to the fixed jaw. There is a damping spring designed to reduce the load on the cams. The experimental results show that the surface quality of the parts formed in the processing chamber is influenced mainly by the following parameters: the air pressure applied to the elastic shell grit abrasive, hardness of the part, the ratio of the diametral dimensions of the part and the elastic sheath during processing. The article also presents the results of the practical implementation of finishing treatments which allow to obtain a predetermined value of roughness of processed surfaces.