FEATURES OF INTRICATE-SHAPED PARTS BY CLOSESETTLED FINE ABRASIVE MEDIA
Skryabin Vladimir Aleksandrovich
The article deals with the particular surface treatment of complex profile parts with loose abrasives, the schemes of processing methods and results of practical implementation of finishing in order of achieving a predetermined magnitude of roughness of the processed surfaces. Inertia forces for this processing method are minimal since the pressure of the abrasive layer on the treated surface is defined by exposure of compressed air steam to the treating medium through an elastic membrane. Unlike the methods of the finish machining with an inertially densified abrasive in which the formation of the densified abrasive layer occurs due to inertial forces, the proposed method of treating means that compacted abrasive mass is formed statically with pressure of compressed air stream to the elastic shell of the chamber and then presses the device directly to the treated surface. Thus, the proposed method enhances the technological capabilities and improves productivity and quality of processing. The cutting tool here is automatically generated from the loose abrasive particles, which are included as a compound of a suspension, when they are compacted into a layer or an elastic bar. At the same time, the abrasive particles copy a shape of a treated surface. Examination of productivity and quality of details such as disks and cams was carried on a test unit, scheme of which is given. The unit is fixed on a table of vertical drilling or radial drilling machine and is connected to its stem. Its annular cavity chamber is supplied with compressed air stream, and it condenses the working fluid, which copies the shape of the machined surface of a workpiece.
Keywords: intricate-shaped details, loose abrasive, methods of treatment, roughness, surface, compacted abrasive layer, inertia, elastic shell chamber device, abrasive particles, dense packing, microhardness, residual stresses, plastic deformation surface layer
For citation: Skryabin V. A. Features of intricate-shaped parts by close-settled fine abrasive media. Vestnik Mordovskogo universiteta [Mordovia University Bulletin]. 2015, vol. 25, no. 4, pp. 72–89. DOI: 10.15507/0236-2910.025.201504.072
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