SU380439A1 - MULTIPLE TOOL FOR MICRORELIEF EDUCATION - Google Patents

Description

one

The invention relates to the processing of metals by plastic deformation.

Multiple tools are known to form a microrelief in the holes of parts by plastic deformation, containing a mandrel and balls that are kept from falling out by a separator and contacting with a conical bearing surface.

In the proposed tool, the mandrel is provided with right and left screw grooves and on it are mounted with the possibility of rotation of the sleeve, elastically interacting with the clips mounted on them and forming with the last nests for balls, and on the hub of each row is fixed groove, respectively, of the right and left direction.

This embodiment allows the adjustable microrelief to roll at the same time over the entire diameter of the pas any length of treatment.

FIG. 1 shows the proposed tool, a general view; in fig. 2 - deforming balloon (node 1); in fig. 3 is a section along the AL in FIG. 2; in fig. 4 shows the location of the crackers in the slot of the guide (section along BB in Fig. 1).

The tool for rolling the microrelief on the surfaces of the parts contains a guide 1, which is a shaft with ranks 2 and 3, made along the right and left

screw m line. The elevation angle of the helix corresponds to the angle of inclination of the roll grooves forming the microrelief. The guide / is mounted on the base 4 and is fixed against rotation by key 5, and from radial displacement by sleeve 6.

Deforming elements - balls 7 are supported on the conical surfaces of the cage 8 of the upper row and on the cage 9 of the lower row, as well as on the conical surface of the sleeves W and // of the corresponding row. Cases 8 and 9 mouths; Sewn on the bus bars 10 and // on the keys with the possibility of relative longitudinal movement for adjusting the tension of the balls 7. In the sleeve 10 of the upper row there are two breadcrumbs 12 included in the groove 3 of the guide. In the sleeve 11 of the lower row, two crackers 13 are secured, which are included in the corresponding groove 2. To prevent one row of crackers from falling into an intersecting groove intended for crackers of the other row, the crackers of each row are located along the axis that is tilted to the axis of the tool, equal to the slope of the corresponding groove of the guide.

The deforming balls are prevented from falling out by the lid 14, and from the offset around the tool axis relative to the clips and bushings - by the unors 15. On the sleeves 10 of the TT 11, a thread is made to install the nuts 16 serving to adjust the tension of the balls 7 by displacing the clips and moving the balls along the conical surface There are several springs 17 between the cage and the hub of each row, evenly surrounded by a spigot, allowing it to maintain a constant tension. The sleeves are installed with the possibility of rotation relative to each other around the axis of the tool. To reduce friction, a set of balls 18 is placed between them. To keep the sleeve 10 from axial displacement relative to sleeve 11, they are folded with brackets 19 rigidly fixed in one of the sleeves and not preventing rotation of the other sleeve relative to the tool axis. The tool also contains a non-rotating nylon 20, non-stressing force directed along the generatrix of the treated surface. The washer is supported on the clips 8 and P through a set of balls 21 in the senator mounted on the plate. A set of balls is used to reduce face friction. Rolling the microrelief on the surfaces to be treated with the aid of the proposed tool is performed as follows. The workpiece is fixedly mounted. Guide 1 is mounted on the base. The bottom row of balls is located above the upper end of the workpiece. A lash 20 is installed on which the force R acts. Under the action of the force P directed along the generatrix of the treated surface, the sleeve 10 of the upper row together with the yoke 8 moves along a helical line, since the crackers 12 move along the groove .3 in the left direction. At the same time, the sleeve 11 of the lower row, together with the yoke 9, does not move along the helix in the opposite direction and is directed by the breadcrumbs 13, moving along the head 2 in the right direction. In addition, each ball 7 forms on the surface being machined a groove in the form of a helix, the elevation angle of which is determined by the angle of inclination of the groove of the guide 1 to the tool axis. The pitch of the grooves obtained is equal to the distance between the centers of adjacent balls 7. When the machining of one part is completed, it is removed, the tool is removed from the base 1. Then the next part is fixed, the tool is turned over. The guide 1 is again mounted on the base 4, the plate washer, a non-exerting force, and the cycle is repeated. In a mass production environment, the cycle will be automated. The subject of the invention Multiple tool for forming a microrelief in the holes of parts by plastic deformation, containing a mandrel and balls held from falling out by a separator and contacting with a conical bearing surface, characterized in that, in order to increase labor productivity, the mandrel is provided with right and left screw grooves and on it are mounted for rotation of the sleeve, elastically interacting with the clips mounted on them and forming together with the latter nests for balls, and on the sleeve each row is firmly fixed to the cracker, which enters the screw groove of the right and left directions, respectively.,. ;

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