SU1657353A1 - Filler granule for finish-machining - Google Patents

Description

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(21) 4487658/08 (22) 09/28/88 (46) 06/23/1. Bul №23 (71) M.N. Kasimov, V.N.Lazarev, V.N.Karavaev and A, E.Petukhov (53) 621.9.048.6.04 (088.8) (56) USSR Author's Certificate No. 403538, cl. B 24 B 31/14, 1971.

(54) GRANULAR FILLER FOR BULK FINISHING AND CLEANING PROCESSING

(57) The invention relates to machine building and instrumentation engineering and can be used in operations for deburring, rounding off and rounding sharp edges. The aim of the invention is to expand technological capabilities by providing selective processing of sharp edges. The implementation of the granule 1 with the groove 2, inside of which the cleaning elements 3 are applied, allows for efficient processing of the edges without disturbing the integrity of the smooth surfaces of the parts 2 Cpl, 7 sludge.

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The invention relates to machine building and instrument making and can be used for dimensionless machining of machine parts and devices for deburring, rounding and rounding of sharp edges.

The aim of the invention is the expansion of technological capabilities by providing selective processing of sharp edges.

Figure 1 shows a granule, a general view; Fig. 2 shows an embodiment of a granule with face recesses; Fig. 3 shows an embodiment of a granule with a displaced center of gravity; Fig. 4 shows an example of the interaction of granules in the performance of their parts with dimensions that allow contact parts to be in contact; figure 5 is the same, with dimensions that exclude the contact of the stripping elements; figure 6 - the interaction of the granules with the edges of the parts; Fig. 7 shows the interaction of the granules with the cylindrical surfaces of the parts.

The granule has the shape of a cylinder 1, on the side surface of which there is an annular groove 2, which can be outlined with broken straight lines forming or have a saddle shape. On the surface of the groove 2, the stripping elements 3 are applied, made in the form of separate teeth (notches).

The groove width is selected from

L / D2-d2, where L is the groove width;

D is the diameter of the extreme parts of the granules;

d is the diameter of the smallest cross section of the groove.

The specified condition excludes stripping contacts.

At the ends of the granules, conical or spherical recesses 4 can be made, in which the stripping elements are made.

In addition, the granule can be made with a center of gravity offset from the center of symmetry.

Pellets are made as follows.

The cylindrical body of the granules is obtained by turning from rolling, stamping, etc. On the side surface, an annular groove of the desired cross section and recess at the ends of the granule is formed.

Wiping elements on the surface of the groove can be obtained in three ways: knurling, notching and cutting right and left corrected taps, providing the angle of the point of the tooth of the cleaning element according to the principle of cutting worm wheels with worm cutters.

Wiping elements in the end grooves receive a notch.

The granules are heat treated to obtain the necessary hardness.

Granule hardness should be higher

hardness of machined parts.

When removing burrs, scraping and rounding of sharp edges in the holes, the size of the granules is chosen from the condition of passage

pellets into the hole.

For processing, the granules in the required amount are loaded into the working capacity of the device for volumetric processing (tumbling drum, centrifugal or vibratory processing device, etc.).

Together with the granules load the workpieces, include the drive device. At the same time, the stripping elements on the surface of the groove 2 and the depressions 4 interact with sharp edges of the parts, burrs, etc. As a result of their mutual movement at the moment of contact, the deburring, rounding of the sharp edges occurs. The smooth surfaces of the parts do not come into contact with the cutting teeth of the granules.

Pellets with a displaced center of gravity when moving have a more complex trajectory of movement than symmetric granules, which intensifies the process of deburring.

The arrangement of the cutting elements in the groove and in the recesses at the ends of the granules ensures the selectivity of processing,

those. cutting elements are in direct contact with sharp edges, burrs, burrs, etc. The treated smooth surfaces of the part do not come into contact with the cutting teeth of the granules.

Claims (3)

1. A filler granule for volume finishing and grinding processing, made in the form of a body of rotation with a groove in the middle part, characterized in that, in order to expand technological capabilities by providing selective processing of sharp edges, extreme parts of the granules are cylindrical, and the surface of the grooves is made of wiper elements, and the width of the grooves is selected from the CONDITIONS L YD - d, where L is the width of the groove; D is the diameter of the extreme parts of the granules; d is the diameter of the smallest cross section of the groove. 2. The granule according to claim 1, characterized in that spherical recesses with stripping elements are made at its ends. 1 Fy 3. Granule according to claims 1 and 2, characterized in that its center of gravity does not coincide with the center of its symmetry. C. t. Fig.Z Fig 5