SU373594A1 - METHOD OF REGISTRATION OF THE MOMENT OF A BLOW OF MISTAKERS - Google Patents

Description

one

This invention relates to the field of materials testing for friction and wear, in particular (to methods for registering the scuffing of rubbing pairs in a vacuum.

Methods are known for recording the moment of a bully of a rubbing barrel in vacuum, which consists in the fact that the sample, made in the form of a truncated cone, is shifted over the counter sample, register the tangential load and the moment of the occurrence of the bully.

However, the known methods do not allow in the process of testing to estimate the limiting bearing capacity of the antifriction coating of the friction pairs.

In order to assess the limiting bearing capacity of the anti-friction coating of the rubbing pairs according to the proposed method, not only the tangential load is recorded, but also the normal acting on the counterpiece, and the occurrence of a bully is judged by the change in ohmic resistance at the point of contact of the rubbing base.

FIG. 1 shows a device that implements the proposed method; in fig. 2 is a scheme for recording the moment of occurrence of a bully.

The device contains a vacuum KaiMepy /, a loading device, made in the form of flat springs 2, with contrasing holders, a manual drive 4 of the sample, a force-measuring device 5 for measuring the tangential load, a normal load recording device made in the form of strain gauges 6 glued on springs 2, and an amplifier (not shown), an ohmic resistance meter 7, and a device for creating variable temperature modes.

The method is implemented as follows.

Before starting the tests, the magnitude of the transient electrical resistance of the metal contact between the counter-specimens 9, which interact simultaneously with a clean (without lubricant) sample 10 in, is determined.

four points. Then the sample is coated with the antifriction test coating, installed in the friction unit and loaded simultaneously at four points with forces applied to the sample / O using flat

springs 2. When the conical sample 10 moves from right to left with the help of the actuator 4, the springs deform and press on the cover with a gradually increasing force. Using a force-measuring device 5, the tangential load is measured, and with the help of strain gauges 6, the value of the normal load. Further, during the test, the load is determined at which the electrical resistance in the contact becomes equal to

previously found transition resistance3

niyu. On the basis of the obtained values, the occurrence of the thEaD and the limiting carrier is determined by the antifriction one. Subject invention

A method for re-recording the moment of a bully of rubbing pairs in vacuum, which consists in the fact that a sample made in the form of a truncated

four

cone, move on kontroraztsu. The tangential load ui is recorded, the moment of occurrence of the bully, characterized in that, in order to estimate the limiting load-carrying capacity of the anti-friction cover of the rubbing pairs, the normal load acting on the onblade is recorded, and the occurrence of the bully is judged by the change of the ohmic resistance at the point of contact of the rubbing pair.

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