SU757913A1 - Apparatus for wear testing of materials - Google Patents

Description

The invention relates to the study of the physicomechanical properties of materials and relates to the determination of the resistance to wear and tear under conditions of continuous deformation, in particular compression with transverse bending. ^five

Known installation for testing materials for wear during reciprocating movement under conditions of friction and sliding, which contains an adjustable drive connected to a crank mechanism, and mounted on the guides of the slide, on which is mounted a counterpiece, interacting with a spring-loaded sample [1]. _d

The closest to the invention in the technical essence and achieved result is a plant that comprises a base and a guide mounted on the slider with them snabzhen- _m nym kontrobrazna holder supporting members kinematically connected.

With the drive of its reciprocating motion. In addition, it has 2

A carriage installed with the ability to move in a direction perpendicular to the direction of movement of the slider, an interacting normal loading mechanism, a carriage stroke limiter and a flat specimen holder mounted on it, whose bearing surfaces are symmetrically inclined at an acute angle to the direction of the slider movement [2].

The disadvantage of the known installations is that it is impossible to provide for them the complex deformation of the tested samples in the process of their friction, which is typical for the details of the die tool. In the course of work, its parts interact with each other with a blow and simultaneously undergo deformations of compression and transverse bending, in connection with which their wear resistance is determined by a combination of these factors.

The purpose of the invention is to conduct tests for wear in a complex stress state.

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This goal is achieved by the fact that the supporting elements of the holder of the counterpiece are spaced to ensure the deflection of the counterpiece during the testing process, and the course of the slide exceeds the distance between these supporting elements.

The drawing shows the scheme of the proposed installation,

The installation consists of a base 1, on which the drive 2 of the reciprocating movement of the slider 3 is rigidly fixed along the guides 4, and the stroke of the slide exceeds the length of the counterpiece holder. In addition, there is a carriage 6 mounted on its guides 5 with a holder of 7 samples 8. The carriage has a limiter 9 of its stroke, made, for example, in the form of an adjusting nut and lock nut, and connected to the normal tension mechanism of a friction pair ₂₀ 10 compression. The support surface of the holder 7 is formed symmetrically inclined, facing to the vertex plane of friction, with the samples mounted thereon, formed _{on May 2} Zuy common edge. Contrast 11 is installed in its holder 12 on spaced support elements, in particular in the centers 13, which provides the possibility of its deflection in the process of testing, ₃₀

The installation works as follows.

Since the slide travel exceeds the length of the counterpiece 11, and the stroke of the carriage is adjusted in such a way ₃₅ / that the edge of the samples 8 in the initial position is below the friction plane, i.e. kontrobraztsa surface 11, the point of contact in the extreme position of the test pieces ₄₀ are mutually interconnected with a punch. Then, as the contour sample 11 moves progressively, its edge slides along the inclined surface of sample 8, as a result of which the spring-loaded carriage 6 ₄₅

and further. The slider in the counterblade causes compression and bending deformations. When the contraband leaves the contact, the carriage returns to its original position and the process is repeated on the return stroke of the slide.

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13 ₄

In the process of testing, chamfers of wear and local surface defects in the form of cracks, chipping, chipping, etc. appear on the edges of the contour sample. in magnitude and nature of which it is possible to judge the durability of a material under conditions of simultaneous action of a complex of loads, the nature of which is close to operational.

The installation allows changing test conditions over a wide range: load, sliding speed, collision frequency, environment, etc.

Its technical and economic efficiency consists in increasing the accuracy of assessing the wear resistance of materials, parts of which are exposed to a complex of various loads under operating conditions.

Claims (1)

Claim * Installation for testing materials for wear, containing a base, with guides, a slide with a support holder fitted with supporting elements, mounted on the guides and kinematically connected with the drive of its reciprocating motion, with a carriage installed with the possibility! displacements in the direction perpendicular to the direction of movement of the slider, the normal loading mechanism interacting with it, the carriage stroke limiter and the holder of flat samples mounted on it, whose support surfaces are symmetrically inclined at an acute angle to the direction of the slider movement, in order to carry out the tests in a complex stress state, the support elements of the counter-sample holder are spaced apart to ensure the counter-sample bend during the test, and the input of the slide exceeds distance between these support elements.