SU35422A1 - The method of determining the roughness coefficient of friction of different products - Google Patents

Description

The proposed method for determining the roughness (friction coefficient) of a surface, product, consists in determining the relationship between the roller's own penetration under the influence of the friction on the test surface and its movement with the carriage at the same time as the roller moves along the pattern.

A device for implementing this method is depicted in FIG. 1 and 2 of the drawing in side views, in FIG. w-cut.

The carriage 12 on the rollers 16 is provided with parallels 13, guiding the movement of the second carriage U on the rollers 14; the latter carries axis 2 with a roller 1 fixed on it, intended during roughness testing of the specimen to move along its surface.

To determine the magnitude of the rotation of the roller 1, a self-recording device was used, in which bending a ha 23 with one end wrapped in several turns around the axis 2 of roller 1 and through a movable roller 24, the pencil 22 of the self-recording device moves. The drums 35 of this recorder receive rotation from the cord 30, one end of which 31 is fixed, and the second one is placed on the axis of one of the drums 35 for several turns and serves to rotate them during the movement of the carriage 12 along the pattern.

The spring brake 8 serves to adjust the friction force between the washer 6 connected to the axis 2 of roller 1 and its supporting surface in the frame of the carriage 11 for the purpose of calibrating the device to a certain accuracy of its indication, depending on the relative freedom of rotation of roller 1 in their bearings.

When the carriage 12 moves along the pattern, the roller 1 receives a rotational movement due to the friction on the sample surface, and the more perfect the sample is, the frictional force will be less and the roller 4 will slide to a greater extent along the pattern without rotating.

According to the ratio of the distance traveled by the roller 1 together with the carriage 12 and by itself thanks to the friction on the test surface, the degree of roughness of the test sample is judged.

The subject matter of the invention.

1. A method for determining the roughness (coefficient of friction) of different products, characterized in that

The surfaces forcefully move the carriage with a roller that moves along the height, and determine the degree of roughness (friction coefficient) as the ratio between its own turning of the roller and the influence. the rub and about the tested surface - and its portable movement together with the Fourth

2. Device for determining the degree of roughness (coefficient of friction) of different products, characterized by the use of two carriages 11 and 12, of which 12

serves to move the instrument over the test surface, ai. The carriage 11, placed in the vertical directions of the 13 carriage of the carriage 12, is equipped with a rotary roller 1, designed for comparing it with O; a pattern for imparting flexible movement to the frame of the self-writer, rewinding the paper that is driven by one end fixed motion tight th 30.

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