SU1401263A1 - Method of checking contact square of two bodies - Google Patents

Abstract

This invention relates to a measurement technique. The goal is to improve the accuracy and reliability of monitoring the contact area of two electrically conductive bodies while ensuring the specified quality of their contacting by eliminating random deviations of the relief of the contacting surfaces, as well as by using the comparison method when performing measurements. The method of controlling the contact area of two electrically conductive bodies consists in applying the same regular microrelief to the contacting surfaces of these bodies, connecting both bodies to a constant or alternating current power source and parallel to them connecting a reference sample to the same source, which is obtained by fusing similar to the controlled object tel. Then, the ratio of the currents flowing through the reference sample and the controlled object is measured, and the contact area, i.e. the contact quality of the electrically conductive bodies, is determined by the magnitude of which. 3 il. (Oh (L

Description

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The invention relates to a measurement technique and can be used in determining the actual contact area and the quality of contacting of parts of an integral joint made of metal, for example sliding bearings.

The aim of the invention is to improve the accuracy and reliability of monitoring the contact area of two electrically conductive bodies while ensuring the specified quality of their contacting by eliminating random deviations of the relief of the contacting surfaces, as well as by using the comparison method when performing measurements.

FIG. 1 shows a scheme for implementing a method for controlling the contact area of two bodies; in fig. 2 - contact surfaces of the reference sample; in fig. 3 - contact surfaces of controlled bodies.

The method of controlling the contact area of two electrically conducting bodies is carried out as follows.

Before the measurements, a reference sample 1 is made, which is made of bodies similar to the object being monitored and 2 connected by fusion methods. For this, the outer sleeve, made of steel, is filled with granulated bronze. Then the sleeve is closed with steel caps, an electric current is passed and a rotational movement is imparted to the sleeve. Under the action of electric current, the bronze melts and, under the action of centrifugal force, is evenly distributed along the inner surface of the steel sleeve. After the current is turned off, the sleeve continues to rotate until the bronze is in a solid state. The fusion of the contacting surfaces provides for almost 100% of the contact area 4 of two electrically conductive bodies (Fig. 2) due to the molecular interaction of the materials from which they are made. Before electro2f contact

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The wire bodies 5 and 6 of the object under test 7 are applied to their contacting surfaces with a regular microrelief 8 (Fig. 3), due to which the quality of contact of these bodies is improved due to the elimination of random deviations of the relief of the contacting surfaces. Next, the monitored object 7 and the reference sample 1 are connected in parallel to the terminals 9 and 10 of the DC or AC power source and the ratio of the currents flowing through them, which is proportional to the contact area of the electrically conductive bodies 5 and 6, is measured.

By eliminating the additional electrically conductive layer in the contact zone of both bodies and eliminating the time-consuming operations of repeatedly measuring the resistance of areas of this layer, the laboriousness of the proposed method for controlling the contact area is reduced compared to the known one.

Claims (1)

Invention Formula The method of controlling the contact area of two bodies, which includes connecting both bodies to a power source and taking into account the magnitude of the current passing through their contacting surfaces, determines the contact area, characterized in that, in order to increase the accuracy and reliability of control of the contact area of two electrically conductive bodies before putting the bodies in contact, their regular contact surfaces are put on their contacting surfaces; the reference sample is connected to the same power source in parallel to the controlled contact bodies. which is carried out in the form of similar contacting bodies connected by fusion, and the ratio of the currents flowing through the reference sample and the controlled bodies, the magnitude of which determines the contact area between them, is measured.  one // X / HuUO 9u.2 i / a.J