SU1161359A1 - Method of working components with abrasive compound - Google Patents

Abstract

A METHOD FOR TREATING DETAILS WITH AN ABRASIVE MASS, consisting in its multiple reciprocating punching along the machined surfaces of parts with the help of a guiding element forming a channel together with the machined surface. In order to expand the technological capabilities by machining the details of a complex profile, the channel through which the abrasive mass is forced is extended, for which blades with a working surface identical to the workpiece surface are installed on both sides of the workpiece.

Description

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The invention relates to the treatment of parts with a free abrasive, in particular parts with a complex profile, having channels inclined or spatially curved (parts such as turbines, guide vanes, fuel equipment, etc.), and can be used in engineering and other industries .

The purpose of the invention is to intensify the process of machining parts with channels of complex configuration.

This goal is achieved with the exception of stagnant zones of abrasive mass by increasing its working path.

FIG. 1 schematically shows a device that implements the proposed method of processing parts, section; in fig. 2 is a view A of FIG. I; in fig. 3 is a diagram of the movement of the abrasive mass through the channel to be processed with guide vanes.

The device comprises a working chamber 1 formed by the cavities of cylinders 2 and 3 with an abrasive mass 4 in the volume of which the workpiece 5 is installed with guide vanes 6 and 7. In section it has vanes inclined to the main movement of the abrasive mass. In the zone adjacent to the channel, the blades have an angle of inclination and shape identical parts. The number of channels in guide vanes formed by the blades corresponds to the number of channels in the part.

The device works as follows.

The part 5 with guide vanes 6 and 7 is installed in the chamber 1, pressed by cylinder 2 to cylinder 3, and by means of 8 and 9, the abrasive mass is repressed through the channels of guide vanes 6 and 7 and part 5. At the same time, the abrasive flow is inclined in the zone adjoining the blades 10 and 11 changes the direction of movement of the main flow of the abrasive mass and enters the part along the tangent plane to the work surface

initial channel section in detail. The opposite side of the channel in the part is processed in the same way as the abrasive mass moves through the channel.

guide in the opposite direction. The supply of abrasive mass tangentially to the surface of the channels in the part eliminates the formation of stagnant zones and the separation of the flow of the abrasive jet, in which

the abrasive does not produce any cutting action. Example. Grinding and polishing of the guide apparatus, which has 37 channels formed by curved blades, was carried out. Parts Material

5 X18N10TL. Abrasive mass on the basis of rubber (with fluoroplastic 4-15%) with abrasive (electrocorundum No. 32) in a weight ratio of 1: 3 was repressurized through channels. When repressing the abrasive mass through the channels (720 kg), a roughness of 0.63 μm was achieved in ten cycles. The initial surface roughness after casting is 12.5 microns. When repressing an abrasive mass through a part without guide vanes on the initial surfaces

5 blades remained untreated areas mm. Then, on both sides of the part, guiding apparatuses with blades were installed, which by quantity correspond to the number of blades in the part. In the area adjacent to the details of the blades of the guide vanes, they are made with an angle of inclination and an edge shape so that the abrasive mass during repressing is fed into the inter-blade channel of the part along tangent planes to the surfaces of the blade of the part, as a result of which the abrasive mass passes under pressure the entire surface of the blade to be processed. The surface roughness after processing is uniform along the entire length of the blades of the part. This eliminates the need

0 manual finishing of the initial surfaces of the blades of the part after extrusion processing.

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Claims (1)

METHOD OF PROCESSING DETAILS BY ABRASIVE WEIGHT, which consists in its multiple reciprocating punching along machined surfaces of parts using a guiding element forming a channel together with the machined surface, characterized in that, in order to expand technological capabilities by processing parts of a complex profile, the channel to which the abrasive mass is pressed, lengthen, for which, on both sides of the workpiece, blades are installed with a working surface identical to the machined Tyva workpiece surface. SU „„ 1161359