SU991259A1 - Device for testing materials for wear and friction under high temperatures - Google Patents

Description

The invention relates to the study of the physicomechanical properties of materials and can be used to test die materials operating in the isothermal mode at high (about 1500 K) temperatures for friction and friction.

The closest to the invention by technical essence and the achieved effect is a device for testing materials for wear and friction at high temperatures, containing a base, a sample holder mounted on it, placed perpendicularly to the holder, a grip for fixing a counter piece, a loading and heating unit of the sample and counterpiece and mechanism for moving the counterpiece

However, the known device is characterized by insufficient reliability of results and efficiency of testing, which is due to the need to remove the sample from the high-temperature zone for cyclic measurement of wear, as well as the processes of sticking in the mechanism of displacement of the grip of the counterpiece.

The aim of the invention is to increase the reliability of the results and effect.

materials testing for wear and friction at high temperatures.

5 This goal is achieved by having a device for testing materials for wear and friction at high temperatures, containing a base, an image holder 10 V3ir mounted on it, a grip that is perpendicular to the holder for fixing the counter piece, a loading and heating unit for the sample and a counter piece, and a mechanism for moving the counter piece, equipped with a second holder mounted symmetrically relative to the counterpiece and coaxially with the sample holder, the two holders are installed with the possibility of simultaneous rota, wear sensor.

20

interacting with the first holder, the mechanism for unloading samples and turning the sample holders around the axes of the holders, electrically connected with the grip and interacting with the wear sensor, and the measuring force of friction interacting with the mechanism for moving the grip.

FIG. 1 shows the device, a general view of FIG. 2 - section

30 A-A and view of the unloading mechanism

swatches and swivel holders in FIG. 1 in FIG. 3 is a sectional view in FIG. 1.

The device comprises a base 1, a holder 2 of sample 3, a gripper 4 of a contra-sample 5, a loading unit b and a node 7 for heating a sample 3 and a counter-sample 5, a gripper moving mechanism (not shown), a second holder 8, a wear sensor 9, a mechanism 10 for unloading and rotating holders 2 and 8, the meter 11 force of friction. Holders 2 and 8 are mounted on supports 12 and 13 and are connected with frame 14. Unloading mechanism 10 and noB The holders 2 and 8 are designed as a double cam (not shown) with their own drive (not shown) connecting the cam and holder 2 spring rod 15 (FIG. 2). Using a limit switch (not shown), mechanism 10 is electrically connected with gripper 4. Clamp 16 is located in holder 2 and is used for fixing holder 2 in two positions when rotated 90 relative to the axis , In holder 8 there is a retainer 17 mounted, which in the absence of load picks up the contra-ridge 5; the wear sensor 9 is connected to the indicator 18. Sample 19 is placed on the holder 8.

The device works as follows

Contrast 5 is placed between samples 3 and 19 and moves at a given speed. Using the loading unit 6, a load is created and the test cycle is conducted. After the counterpiece has been moved for a given distance, the limit switch turns on the cam drive. The latter unloads the specimen 3 and 19 and the contra-sample 5, then lifts the holder 2 with the sample 3, and the carrier 15 rotates the holder 2 at an angle of 90 ° (at the same time the holder 8 also rotates through the frame 14) until it locks using the lock 16 in the second position. In this case, the holder 2 is lowered until the samples 3 and 19 are in contact. Their wear is measured using a sensor 9 and an indicator

18. After this, holder 2 rises, rotates (together with holder 8) in the opposite direction to the initial state, which is fixed by latch 16. With the help of unit 6, samples 3 19 and counterpiece 5 are loaded, and a new test cycle begins. In this case, the cam rotates one turn and stops. The friction force is monitored by the gauge 11.

The positive effect is due to the increased reliability of the results and the effectiveness of testing materials for wear and friction at high temperatures.

Claims (1)

Invention Formula A device for testing materials for wear and friction at high temperatures, comprising a base, a sample holder mounted thereon, a grip mounted perpendicularly to the holder for securing the counter piece, a loading and heating unit for the sample and counter piece, and a mechanism for moving the counter piece, characterized in increase the reliability of the results and the effectiveness of the test, it is equipped with a second holder that is installed symmetrically relative to the counterpiece and coaxially with the sample holder, a carrier mounted for simultaneous rotation, the wear sensor interacting with a first holder mechanism unloaded samples and sample holders around the rotation axes of holders electrically associated with the capture and cooperating with a wear sensor, meter and friction forces interacting with the movable gripping mechanism. Sources of information taken into account during examination 1. USSR author's certificate. 369453 ,, кл. G 01 N 3/00, 1970 (prototype) i ai-- ± --- .li-J Phage. 2