RU177001U1 - DEVICE FOR CREATING PRELIMINARY LOCAL PLASTIC DEFORMATION - Google Patents

Abstract

The utility model relates to mechanical engineering technology, namely to devices for the finishing and hardening of workpieces from various assortments of titanium alloys of low ductility, where high demands are placed on the quality of the surface layer processed on CNC lathes. A device for creating preliminary local plastic deformation containing a housing , a support for a deforming ball, a spring, a deforming ball, a separator, characterized in that the device is additionally equipped with a system for holding constant force, made in the form of a plunger, a retaining ring, rigidly fixed in special grooves on the housing, restricting the stroke of the plunger, a piston with a lead screw, fixed in the installation nut, o-rings in the piston and plunger, an adjusting nut, and also equipped with a pressure gauge installed into the adapter sleeve in the hydraulic housing.

Description

The utility model relates to mechanical engineering technology, namely to devices for finishing and hardening processing of workpieces from various assortments of low-ductility titanium alloys, where high demands are placed on the quality of the surface layer processed on CNC lathes.

A device for static-static surface plastic deformation by a rotating tool (patent RU 2287424, publ. November 20, 2005), containing a hammer, waveguide and deforming tool installed with the possibility of applying to it normally to the treated surface of a static load and periodic pulsed load with using striker and waveguide.

The disadvantage of this tool is the low accuracy of the control of the rolling force, as a result of the uneven creation of the deforming zone.

The technical result is the creation of a device for machining parts with preliminary local plastic deformation at each stage of machining, which will improve the accuracy and quality of surface treatment, increase the wear resistance of the cutting tool and expand the assortment of processed materials.

The technical result is achieved by the fact that the device is equipped with a piston located in the housing with the formation between it and the plunger of the cavity filled with oil, and made with an adjusting screw installed in the threaded hole of the installation nut screwed into the housing from the side opposite the plunger, with the possibility of movement for compressing oil in the housing cavity and transferring pressure to the plunger and fixing its position by means of an adjusting nut mounted on the adjusting screw with emphasis on the set nut, with a plug installed with the possibility of compression by a piston and a pressure gauge to determine the pressure in the housing cavity installed in the adapter sleeve soldered into the housing, the plunger being installed with the possibility of restricting its stroke by means of a ring rigidly fixed in the housing, and the piston and plunger are equipped with o-rings to prevent leakage oils.

A device for creating local plastic deformation is illustrated by the following figures:

FIG. 1 - General view of the device, where:

1 - deforming ball;

2 - separator;

3 - a plunger;

4 - bearing;

5 - pin;

6 - a lock ring;

7 - a piston;

8 - spring;

9 - an adjusting nut;

10 - an adjusting nut;

11 - adapter sleeve;

12 - hydraulic oil;

13 - sealing rings;

14 - hole housing;

15 - workpiece;

16 - case;

17 - surface support deforming ball.

The device comprises a housing 16 with a through hole of the housing 14 directed along its length, a plunger 3 with an external thread for the stroke of the separator 2, mounted in the cavity of the housing 16, in which, using a pin 5, a bearing 4 is fixed with the support surface of the deforming ball 17, the retaining ring 6 to limit the stroke of the plunger 3, fixed in the cavity of the housing 16, the mounting nut 9 on the back of the housing 16 relative to the plunger 3 with two countersink holes for the possibility of unscrewing from the housing 16, an external thread for fixing position and internal thread for regulating the compressive force, a spring 8, compressed and stretched by means of a piston 7 depending on the direction of rotation of the thread of the adjusting screw of the piston 7, screwed into the threaded hole of the set nut 9, the deforming ball 1, installed in the separator 2 having a hole with internal thread for running along the mating threaded surface of the plunger 3, 4 of the sealing ring 13, installed in two pieces in the piston 7 and the plunger 3 to prevent hydraulic overflow oil 12, located in the cavity of the housing 16 between the piston 7 and the plunger 3, an adjusting nut 10, screwed on the threaded part of the piston 7 until it stops against the surface of the installation nut 9, a transition sleeve 11 soldered into the housing 16 to connect the pressure gauge and determine the pressure of the hydraulic oil 12 .

The device operates as follows. The workpiece 15 is installed in the centers of the machine, and the housing 16 of the device is fixed in the tool holder. By rotating the separator 2 along the thread of the plunger 3, it, together with the deforming ball 1, is brought to the workpiece 15 to create a contact point, after which the workpiece 15 is rotated. Clockwise rotation of the threaded surface of the piston 7 along the counter thread of the set nut 9 compresses the hydraulic oil 12, which, in turn, transfers pressure to the plunger 3, which, when squeezed out by the action of hydraulic oil 12, brings the surface of the support of the deforming ball 17 of the bearing 4 to the deforming ball 1. In this case, the pressure supplied to the hydraulic oil 12 from the piston 7 remains unchanged by fixing the position of the piston 7 with the adjusting nut 10 and the spring 8, and the pressure exerted on the plunger 3 with hydraulic oil 12 is constantly due to the inability to flow hydraulic oil 12 through the cavity of the housing 16, which is ensured by a set of sealing rings 13 in the plunger 3 and the piston 7. It is possible to adjust the local physical impact on the workpiece 15 according to the pressure gauge (not marked in Fig. 1) fixed in the adapter sleeve 11 by rotation of the piston adjusting screw 7. After contact with the deforming ball and start of rotation of the workpiece 15 by radial movement of the tool holder to the workpiece 15 taste 15) load with a deformation force and move along the surface to be treated. In this case, the deforming ball 1 interacts with the surface of the support of the deforming ball 17 and the surface of the workpiece 15. A device for creating local plastic deformation can significantly reduce the dynamic load on the cutting wedge of the tool, increase its resistance and, as a result, increase the accuracy and surface quality of the workpieces by creating local metastability in the deformable surface layers of the parts.

Claims (1)

A device for local plastic deformation, comprising a housing in which a plunger is mounted, made with support for a deformation ball located in the separator, characterized in that it is equipped with a piston located in the housing with the formation of an oil-filled cavity between it and the plunger, and made with an adjusting screw installed in the threaded hole of the installation nut screwed into the housing from the side opposite the plunger, with the possibility of movement to compress oil in the cavity of the housing and and pressure on the plunger and fixing its position by means of an adjusting nut mounted on the adjusting screw with emphasis on the adjusting nut, a spring mounted with the possibility of compression by the piston, and a pressure gauge for determining the pressure in the housing cavity installed in the adapter sleeve soldered into the housing, while the plunger is installed with the possibility of restricting its stroke by means of a ring rigidly fixed in the housing, and the piston and plunger are provided with o-rings to prevent oil flow.

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