RU14540U1 - COMBINED TOOL FOR PROCESSING INTERNAL CYLINDRICAL SURFACES - Google Patents

Abstract

A combined tool for processing internal cylindrical surfaces, containing a mandrel on which the blocks are located: cutting, cleaning and deforming, the deforming being installed with the possibility of translational movement along the mandrel, characterized in that the deforming block is made in the form of alternating elements of Belleville springs and washers with holes for suspension feed.

Description

Combined tool for machining internal cylindrical surfaces.

The utility model relates to mechanical engineering, namely to tools for cutting and applying antifriction coatings of metal materials combined with surface plastic deformation, and can be used for machining internal cylindrical surfaces, for example, holes in hydraulic cylinder parts.

A device for applying soft antifriction metal coatings according to a. with. No. 1449333, class B24B39 / 04 of 01/07/89, containing a drive shaft rigidly connected to the housing with a rubbing element and an additional elastic resilient movement mechanism on flat and shaped surfaces. The rubbing element is made in the form of a roller with helical grooves, the latter being mounted on the drive shaft with a gap, and the elastic additional movement mechanism is made in the form of bushings with eccentric axis of the device with fingers for fastening the roller to the housing.

The principle of operation of this device requires prior to application of the antifriction metal coating to pretreatment by cutting with a given value of roughness with the required volume of depressions formed by microroughnesses.

A device for applying metal coatings to products according to a. with. No. 1579744, cl. V24V39 / 00 from 07.23.90, which is presented in the form of a cylindrical brush with the possibility of interaction with a bar of coating material, followed by sealing with a roller. The purpose of the invention is to improve the quality of the coating by increasing its thickness and density.

MKI 7 V24V39 / 00

In this case, due to the presence of residual magnetism during repeated repetition, sticking of the alloying metal coating on the roller sealing elements may occur, which will affect the surface quality of the workpiece.

The closest technical solution to the protected utility model is a combined tool for processing internal cylindrical surfaces certificate No. 12807 class. 7В24В39 / 00 dated 02.10.2000. The tool contains a mandrel with sequentially installed cutting elements, scouring, rubbing and deforming blocks, and the rubbing block is made in the form of a disk spring of antifriction material, and the deforming one in the form of a mandrel installed for movement along the mandrel.

However, the resource of the rubbing elements is relatively small and depends on the radial size of the limited design of the rubbing part.

The task at hand is the improvement of the design of the instrument.

The technical result is the expansion of the technological capabilities of the mandrel, by combining the operations of applying an antifriction coating and surface plastic deformation, providing the formation of a new antifriction

the surface layer due to the introduction (mass transfer) of the coating elements from the suspension of the data center by the action of the temperature and force factor that occurs during burning, and therefore, improving the quality and wear resistance of the surface layer of the inner cylindrical hole.

This technical result is achieved in that in a combined tool for processing internal cylindrical surfaces containing a mandrel, on which the blocks are located: cutting, cleaning and deforming, mounted with the ability to move along the mandrel, the deforming block is made in the form of alternating elements of Belleville springs and washers with holes for supplying a suspension.

 2

In FIG. 1 shows the proposed tool, General view: The tool is made as follows:

On the mandrel 1, the elements are sequentially arranged: cutting unit 2, stripping unit 3, deforming unit 4.

In the installation zone of the deforming unit 4, the mandrel 1 has an axial channel 5 with radial channels 6. On this side of the mandrel 1 there is a sleeve 7 to which a device 8 for supplying a suspension under pressure is connected. The nuts 9 mounted on the other end of the mandrel 1 prevent the movement of the cutting and rubbing blocks along its axis.

The cutting unit 2 is presented in the form of a reamer 10, fixed from rotation relative to the mandrel 1 by a key 11. The cleaning unit 3, is presented in the form of a sleeve 12, fixed on the mandrel 1 by a pin 13. A felt ring 5 is fixed on the sleeve 12 with the nut 14.

The deforming unit 4 is presented in the form of a mandrel, consisting of rings 16, the design of which is made in the form of disk spring links, which allows changing the diametrical size of the deforming element as necessary. Washers 17 are located between the rings 16. The rings 16 and the washers 17 are mounted on a mandrel with a clearance. On each washer 17 there are radial holes 18 and an annular groove 19, which provide a suspension to the treatment zone.

The device operates as follows.

Set the workpiece with a pre-machined hole. The device is informed of rotational motion and feed rate. Initially, a reamer 10 comes into contact with the workpiece, which processes the hole. Further, the stripping unit 3 removes cutting products from the surface to be treated. Then, the rings 16 come into contact with the workpiece. deforming unit 4. Simultaneously with the operation of the deforming unit in the processing zone through channels 5 and 6 comes under

a pressure suspension (for example, a suspension consisting of 70% fine molybdenum disulfide powder and 30% glycerol).

Coating occurs on the surface from the composition of the suspension with its simultaneous surface plastic deformation. When a suspension is supplied under pressure, metal particles are introduced into the troughs of ultramicroregularities, due to the roughness, which are formed after processing by cutting with a reamer 10. Simultaneously, a surface-plastic

deformation of the applied antifriction material and a thin layer of the workpiece metal with rings 16. As a result, the coating elements are introduced (mass transfer) from the suspension into the workpiece’s work surface. The design of the deforming unit 4, allows you to adjust the thickness of the coating, by changing the number of links from the rings 16 and their diametrical size.

As the rings 16 wear, due to the possibility of moving them along the mandrel 1, their required diametric size is achieved by tightening the sleeve 7. Then the diametrical size of the rings 16 is controlled by a measuring tool.

The design of the device provides the ability to quickly replace all structural elements as they wear out.

In the proposed device, improving the quality, wear resistance of the surface layer of the inner cylindrical hole and expanding the technological capabilities of the mandrel, by combining the application of anti-friction coating and surface plastic deformation, ensuring the formation of a new anti-friction surface layer due to the introduction (mass transfer) of coating elements from the suspension under the action of temperature force factor that occurs during burning.

d)

Claims (1)

A combined tool for processing internal cylindrical surfaces, containing a mandrel on which the blocks are located: cutting, cleaning and deforming, the deforming being installed with the possibility of translational movement along the mandrel, characterized in that the deforming block is made in the form of alternating elements of Belleville springs and washers with holes for suspension feed.