SU947702A1 - Device for testing material specimens for wear - Google Patents

Description

The invention relates to the testing of materials, in particular, devices for assessing the wear resistance of materials.

A device is known for studying the wear resistance of a unit, comprising a base, two coaxially mounted cylindrical elements having respectively an outer and an inner surface of friction, and individual drives of rotation of the elements 1.

The disadvantages of the known device are the narrow scope, the impossibility of simultaneously examining various materials (since the inner element is designed to test only the sample), the absence of measurements of the sample wear during the test, and the low productivity of the tests.

The purpose of the invention is to universalize the device and increase its performance.

The goal is achieved by the fact that a device containing a base, two coaxially mounted and interacting cylindrical elements, each of which is connected by a rotating drive, is equipped with a microscope for non-contact measurement of linear wear during the test, mounted on a base that can be moved in two mutually perpendiculars radial grooves at different heights, designed to be installed in them with the ability to move the perp Dikulja tuft axis obraztsederzhate10 leu element arranged at one end of the samples, and the other end - tags - linear wear indicators, against which is placed the microscope eyepiece.

15

-The drawing shows a schematic diagram of the device.

The device contains a base (not shown), the inner cylindrical element (drum) 1, the outer

20 element (drum) 2 and block 3 for measuring linear wear. The inner drum 1 has radial slots guides 4 for holders 5 of samples 6, placed evenly on

Claims (2)

25 different heights along a helical line for providing individual sliding tracks of samples 6. Samples 6 are fastened with screws 7. Indicators 8 of 30 of the nose are attached to the holders 5. The inner drum 1 is rotated by the drive 9 by means of the gear 10 and shaft 11. The outer drum 2 is rotated at water 12 by the gear 13 and the bore shaft 14. An annular element 15 is fixed on the inner surface of the drum 2. Unit 3 linear wear measurement includes a microscope 16, fixed with a bracket 17 on a stand 18 which moves in vertical guides 19 with a drive screw 20. The movement of the stand 18 is measured with a measuring head 21 fixed on rails 19. For The focusing microscope 16 on the wear indicator 8 serves as a drive screw 22, which moves the stand 18 vertically along the guide rails 23. A strobe indicator 24 serves to illuminate the wear indicator. The device operates as follows. Samples 6 of the materials under study are fastened with screws 7 in holders 5. An annular element 15 is fastened on the inner surface of drum 2. The non-contact linear wear unit is adjusted, for which the microscope 16 is focused on the wear indicator 8 of the holder 5 so that The microscope plane remains, the wear indicator of the next sample. At the same time, by moving the bracket 17 along the stand 18 and the stand 18 itself along the guides 23, the drive screw 22 is set to The measuring axis of the measuring head 21 coincides with the axis of the rod of the upper holder 5. In this position, the bracket 17 of the microscope 16 is fixed to the rack 1. 5. The measuring head 21, after the pickup of the microscope 16, is brought into contact with the stand 18 and is adjusted to zero. As the samples 6 are worn, the wear indicator 8 moves in the radial direction. Using a screw 20, the dashed line of the microscope's ocular grid 16 again leads to a wear indicator. The displacement of the microscope 16 with the stand 18 on the guides 19 is measured by the head 21. The offset obtained corresponds to the linear wear of the sample over a defined period from the beginning of the test. The linear wear measurement of other samples is carried out in a similar manner. When the inner drum 1 rotates under the influence of centrifugal force, the samples 6 are pressed against the ring-shaped element 15. The pressing force depends on the speed of rotation of the drum 1, the mass of the samples 6 and the holders 5 installed in the radial guides 4 of the drum 1 with the possibility of movement. This allows the pressing force to vary widely. The magnitude of the relative slip speed during testing of samples depends on the speed and direction of rotation of the drums 1 and 2. The use of the device contributes to the reduction in the life cycle of materials for wear, the expansion of the range of test modes and the increase in test performance. Claims An apparatus for testing samples of materials for wear, comprising a base, two coaxially mounted and interacting cylindrical elements, each of which is associated with a rotational drive, characterized in that it is equipped with a microscope for non-contact measurement of linear wear to improve performance. mounted on the base with the ability to move in two mutually perpendicular directions, and on the inner element there are radial grooves on different cells intended for loading the movable perpendicular to the axis obraztsederzhateley element arranged at one end of the samples and on the other - tags - linear wear indicators, which is placed against the microscope eyepiece. Sources of information taken into account in the examination 1. USSR Author's Certificate No. 287380, cl. G 01 N 3/56, 1970 (prototype).