A control system and method for a friction and wear testing machine

Abstract

This application relates to a control system and method for a friction and wear testing machine. The system includes a loading mechanism, a power mechanism, a monitoring mechanism, and an electrical control box. The loading mechanism includes a vertical plate and a lever. One end of the lever is equipped with a mounting assembly for mounting a pin sample. The vertical plate, located at the other end of the lever, is equipped with a cam assembly for driving the pin sample upward. The other end of the lever is equipped with a counterweight assembly for driving the pin sample downward. The power mechanism includes a high-speed motor. The electrical control box is used to cool the motor windings and bearings when their temperature exceeds a threshold, and to shut down the high-speed motor when the vibration value of sensitive parts of the motor exceeds a threshold. The cam assembly and the counterweight assembly drive the lever to move, realizing the loading and unloading of the pin sample and the disc sample. The cam assembly can simulate the experimental environment of high-speed impact, which helps to improve the test results. Real-time monitoring and early warning of the high-speed motor's status helps to ensure the normal operation of the testing machine.

Description

Technical Field

[0001] This application relates to the technical field of testing machines, and in particular to a control system for a friction and wear testing machine. Background Technology

[0002] In the field of engineering machinery, wear failure is one of the main failure modes of materials. Currently, various wear testing machines designed and manufactured mainly involve wear failure modes such as sliding wear, rolling wear, impact wear, and vibration wear of materials, in order to detect the quality of wear resistance of materials.

[0003] Based on different friction pair forms, friction and wear can be divided into friction and wear with ball, pin-disc, and reciprocating contact modes. Current friction and wear tests mainly study the friction and wear between multiple materials and the same grinding surface, and the friction and wear mode is usually the friction and wear between pins and discs.

[0004] For pin-disc friction and wear testing under high-temperature conditions, existing pin-disc friction and wear machines typically include a frame, a loading drive mechanism above the frame, and a horizontal reciprocating disc below. The upper surface of the horizontal reciprocating disc is coated with a composite material. The loading drive mechanism applies a downward loading force to the loading column by contacting the top of the loading column with a pressure sensor. The loading column is mounted in a fixed sliding sleeve that can move vertically up and down. After being subjected to the loading force, the loading column is guided downward within the fixed sliding sleeve, driving the sample pin, which is fixed to the loading column, downward. The downward sample pin contacts the composite material on the horizontal reciprocating disc, thereby causing friction and wear.

[0005] When the reciprocating disc, which performs high-speed horizontal reciprocating motion, causes friction between the composite material and the bottom of the sample pin, a large amount of heat is generated. This heat is transferred upward from the bottom of the sample pin to the loading column, causing the temperature of the loading column to rise significantly. The loading column, which is hotter, will thermally expand. The expanded loading column is prone to jamming with the fixed sliding sleeve, which weakens the loading effect of the loading drive mechanism above the loading column. This makes it difficult to transfer the loading force to the sample pin, resulting in inaccurate test results for friction and wear, and is also detrimental to the normal operation of the testing machine. Summary of the Invention

[0006] To improve the accuracy of friction and wear test results while ensuring the normal operation of the testing machine, this application provides a control system and method for a friction and wear testing machine.

[0007] Firstly, the friction and wear testing machine control system provided in this application adopts the following technical solution:

[0008] A control system for a friction and wear testing machine includes:

[0009] A loading mechanism for driving a pin sample to move up and down includes a vertical plate and a lever mounted on the vertical plate via a rotating shaft. One end of the lever is provided with a mounting assembly for mounting the pin sample. The vertical plate and the other end of the lever are provided with a cam assembly for driving the pin sample to move upward. The end of the lever away from the mounting assembly is provided with a counterweight assembly for driving the pin sample to move downward.

[0010] A power mechanism for driving the rotation of the disc sample, the power mechanism including a high-speed motor and a fixing block for mounting the disc sample, the output shaft of the high-speed motor being connected to the fixing block;

[0011] The monitoring mechanism includes a temperature sensor and a vibration sensor. The temperature sensor is used to monitor the temperature values ​​of the motor windings and bearings in the high-speed motor in real time, and the vibration sensor is used to monitor the vibration values ​​of sensitive parts of the high-speed motor in real time.

[0012] The electrical control box is used to connect to temperature sensors and vibration sensors. The electrical control box is used to perform cooling treatment when the temperature value of the motor windings and bearings is higher than the corresponding threshold, and to control the high-speed motor to shut down and issue an alarm when the vibration value of the sensitive parts of the motor is higher than the corresponding threshold.

[0013] By adopting the above technical solution, the cam assembly and counterweight assembly drive the lever movement to realize the loading and unloading of the pin sample and the disc sample. The cam assembly can simulate the experimental environment of high-speed impact, and the test results of the pin sample and the disc sample will be more accurate. In addition, by monitoring the status of the high-speed motor in real time and performing early warning processing, the damage to the high-speed motor can be effectively reduced, which helps to ensure the normal operation of the testing machine.

[0014] Optionally, the cam assembly includes a cam, an encoder, and a servo motor. The servo motor is connected to the cam via the encoder, and the encoder is connected to an electrical control box. The electrical control box is used to determine the rotation angle of the cam based on the position signal of the encoder and to control the start and stop of the servo motor.

[0015] Optionally, the counterweight assembly includes a fixed pulley and a connecting rope threaded through the fixed pulley. One end of the connecting rope is connected to a lever, and the other end is connected to a weight tray for placing the counterweight.

[0016] Optionally, the mounting assembly includes a connecting seat and a torque sensor disposed on the connecting seat, the torque sensor being connected to the lever, and the pin sample being mounted on the connecting seat;

[0017] The torque sensor is connected to the electrical control box and is used to detect the frictional torque on the pin sample in real time and send it to the electrical control box.

[0018] Optionally, a wear displacement measuring component is also included, which includes an indicator grating mounted on the upright plate and a reading head mounted on the lever. The indicator grating is connected to the electrical control box and is used to detect the downward displacement of the reading head and send it to the electrical control box.

[0019] Optionally, a purified voltage regulator is also included, wherein the input terminal of the purified voltage regulator is connected to a power supply, and the output terminal of the purified voltage regulator is connected to an electrical control box.

[0020] Secondly, the friction and wear testing machine control method provided in this application adopts the following technical solution:

[0021] A control method for a friction and wear testing machine, based on the friction and wear testing machine control system described in the first aspect above; the control method includes:

[0022] Obtain the setting parameters of the testing machine; wherein, the setting parameters include the test radius, test duration, test force, friction torque, and rotational speed;

[0023] The measurement parameters of the testing machine are obtained based on the set parameters, wherein the measurement parameters include test time, loading force, motor current and linear velocity;

[0024] Motor current curves are generated based on all motor currents during the test period, sample linear velocity curves are generated based on all linear velocities during the test period, and loading force curves are generated based on all loading forces during the test period.

[0025] Optional, also includes:

[0026] When the test reaches the test duration or the set number of revolutions, the warning light on the control display will illuminate, and the testing machine will be stopped.

[0027] Optionally, obtain a reset request;

[0028] A data save dialog box is sent to the display screen based on the reset request;

[0029] According to the data save dialog box, collect the request to save the original data;

[0030] Based on the request to save the original data, a data storage path is selected, and the original experimental data is saved.

[0031] In summary, this application includes at least one of the following beneficial technical effects:

[0032] 1. The cam assembly and counterweight assembly drive the lever movement to realize the loading and unloading of the pin sample and the disc sample. The cam assembly can simulate the experimental environment of high-speed impact, which will result in a more accurate test result for the pin sample and the disc sample. In addition, by monitoring the status of the high-speed motor in real time and performing early warning processing, the damage to the high-speed motor is effectively reduced, which helps to ensure the normal operation of the testing machine.

[0033] 2. The counterweight assembly uses gravity loading. By placing counterweights of different weights on the weight tray, different forces are applied to the lever to simulate different loading conditions. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the control system of a friction and wear testing machine, as shown in one embodiment of this application.

[0035] Figure 2 This is a structural diagram of the control system of a friction and wear testing machine shown in one embodiment of this application.

[0036] Figure 3 This is a structural block diagram of the control system of a friction and wear testing machine shown in one embodiment of this application.

[0037] Figure 4 This is a power wiring diagram of the control system of a friction and wear testing machine shown in one embodiment of this application.

[0038] Explanation of reference numerals in the attached drawings: 1. Loading mechanism; 11. Vertical plate; 12. Lever; 121. Fulcrum; 122. Power arm; 123. Resistance arm; 13. Counterweight assembly; 131. Fixed pulley; 132. Connecting rope; 133. Weight tray; 134. Counterweight; 14. Cam assembly; 141. Cam; 15. Mounting assembly; 151. Connecting seat; 152. Adjusting rod; 153. Mounting block; 154. Fixture; 155. Pin sample; 156. Torque sensor; 2. Power mechanism; 21. High-speed motor control cabinet; 22. High-speed motor; 23. Fixing block; 24. Disc sample; 3. Monitoring mechanism; 31. Temperature sensor; 32. Vibration sensor; 33. Grating ruler; 4. Electrical control box; 5. Purified and regulated power supply; 6. Terminal. Detailed Implementation

[0039] The following combination Figures 1-4 This application will be described in further detail.

[0040] This application discloses a control system for a friction and wear testing machine.

[0041] As one implementation method of a control system, such as Figure 1 and Figure 2As shown, the friction and wear testing machine control system includes a loading mechanism 1 for driving the pin sample 155 to move up and down and a power mechanism 2 for driving the disc sample 24 to rotate. The pin sample 155 is pressed on the disc sample 24. By rotating the disc sample 24 at high speed, the wear condition of the pin sample 155 and the disc sample 24 is checked, and the wear resistance and friction coefficient of the material during high-speed friction are determined, as well as the changes in the surface and subsurface microstructure of the material under high-speed friction.

[0042] Specifically, such as Figure 1 and Figure 2 As shown, the loading mechanism 1 includes a vertical plate 11 and a lever 12 mounted on the vertical plate 11. The lever 12 includes a fulcrum 121, a power arm 122, and a resistance arm 123. The lever 12 is rotatably mounted on the vertical plate 11 via the fulcrum 121. A counterweight assembly 13 for driving the power arm 122 to rotate upward is provided at one end of the power arm 122 away from the fulcrum 121. A cam assembly 14 for driving the power arm 122 to rotate downward is provided at one end of the vertical plate 11 away from the fulcrum 121. An installation assembly 15 for installing a pin sample 155 is provided at one end of the resistance arm 123 away from the fulcrum 121.

[0043] It should be noted that the counterweight assembly 13 includes a fixed pulley 131 mounted on the upright plate 11 and a connecting rope 132 threaded through the fixed pulley 131. One end of the connecting rope 132 is connected to the power arm 122, and the other end is connected to a weight tray 133 for placing counterweights 134. By placing counterweights 134 of different weights on the weight tray 133, different forces are applied to the power arm 122, simulating different loading conditions.

[0044] The cam assembly 14 includes a cam 141, an encoder, and a servo motor. The lowest point of the cam 141 does not contact the power arm 122, while the highest point of the cam 141 contacts the power arm 122. The servo motor is connected to the cam 141 via the encoder, which is connected to an electrical control box 4. The electrical control box 4 is used to determine the rotation angle of the cam 141 based on the position signal from the encoder and to control the start and stop of the servo motor.

[0045] Driven by the servo motor, cam 141 rotates. When the highest point of cam 141 contacts the power arm 122, the power arm 122 rotates downward. Through the lever principle 12, the resistance arm 123 rotates upward. At this time, the mounting assembly 15 moves the pin sample 155 upward, which is in an unloading state. When cam 141 is not in contact with the power arm 122, the power arm 122 rotates upward under the action of the counterweight assembly 13. The resistance arm 123 drives the pin sample 155 downward, which plays a role in downward loading. At this time, the pin sample 155 contacts the disc sample 24. The cam 141 and the counterweight assembly 13 drive the lever 12 to move, realizing the loading and unloading of the pin sample 155 and the disc sample 24.

[0046] It should be noted that the rotation angle of cam 141 is determined based on the position signal of the encoder. One rotation of cam 141 is 360 pulses. With zero point as the base point, one signal means 1°.

[0047] Before loading, the distance between the pin sample 155 and the disc sample 24 is at its maximum. At this time, when the highest point of the cam 141 contacts the lever 12, this position is defined as the zero point of the cam 141, also defined as 0°. This state corresponds to the unloading state of the test force.

[0048] At the start of loading, cam 141 first rotates from 0° to 48°. During this process, pin sample 155 moves downwards. Cam 141 continues to rotate. Because the radius of rotation is the same from 48° to 146°, the distance between pin sample 155 and disc sample 24 remains unchanged during this interval. Cam 141 continues to rotate, and pin sample 155 continues to move downwards. When it rotates to 198°, pin sample 155 is just in contact (tangential) with disc sample 24. Therefore, the interval from 0° to 146° is actually a no-load stroke for cam 141, with no actual loading force.

[0049] Cam 141 continues to rotate, loading begins, the pin sample 155 stops moving downwards and remains stationary, the effort arm 122 of lever 12 gradually disengages from cam 141, and the weight of counterweight 134 is gradually and completely applied to pin sample 155, completing the loading process. During the experiment, due to wear on pin sample 155, lever 12 rotates around fulcrum 121, and the effort arm 122 of lever 12 may come into contact with cam 141, thus being limited by cam 141. To prevent the effort arm 122 of lever 12 from contacting cam 141 after pin sample 155 wears, thus preventing the application of loading force, cam 141 needs to continue rotating from 147°, reserving space for lever 12 to move. When it rotates to 282°, cam 141 is furthest from lever 12, at which point cam 141 stops rotating, awaiting the next instruction.

[0050] Similarly, when the loading mechanism 1 receives the unloading command, the servo motor drives the cam 141 to complete a 49° rotation. That is, when it rotates to 331°, the pin sample 155 no longer contacts the disc test, the loading ends and the unloading begins. When the cam 141 rotates from 331° to 360°, the highest point of the cam 141 contacts the lever 12. At this time, the cam 141 returns to the zero position, completing the unloading action.

[0051] In addition, such as Figure 2 As shown, the mounting assembly 15 includes a connecting base 151 and a torque sensor 156. The connecting base 151 includes a mounting block 153 and two adjusting rods 152 evenly distributed on the mounting block 153. Each of the two adjusting rods 152 is equipped with a clamp 154 ​​for holding a pin sample 155. The clamps 154 and the adjusting rods 152 are slidably disposed, allowing adjustment of the test radius of the pin sample 155 on the clamps 154. A scale is provided on the adjusting rods 152 for adjusting the test radius or obtaining the test radius of the pin sample 155 according to the scale.

[0052] Torque sensor 156 is mounted on mounting block 153 and connected to resistance arm 123 of lever 12. When disc sample 24 rotates clockwise at high speed, the frictional force on pin sample 155 is tangential to disc sample 24, generating a torque relative to the center of circular motion. This torque is rigidly transmitted to torque sensor 156 via pin sample 155, which then detects the frictional torque on pin sample 155. It should be noted that torque sensor 156 is connected to electrical control box 4 to detect the frictional torque on pin sample 155 in real time and transmit it to electrical control box 4.

[0053] Specifically, the power mechanism 2 includes a high-speed motor control cabinet 21, a high-speed motor 22, a fixing block 23 for mounting the sample plate 24, and a motor air-cooling assembly, with the output shaft of the high-speed motor 22 connected to the fixing block 23. A frequency converter is used for closed-loop vector control of the high-speed motor 22, and a speed encoder is used as the feedback element for high-precision vector closed-loop control. This allows for the calculation of the actual rotational speed and the matching of the back electromotive force and drive current, thereby protecting the high-speed motor 22.

[0054] The high-speed motor control cabinet 21 is connected to a 380V power supply, and the panel of the high-speed motor control cabinet 21 is equipped with a "Power On" button, a "Power Off" button, and an "Emergency Stop" button, which are used to control the power supply of the high-speed motor 22.

[0055] As another implementation of the control system, such as Figure 2 and 3As shown, it also includes a monitoring mechanism 3, which includes a temperature sensor 31 and a vibration sensor 32. The temperature sensor 31 is used to monitor the temperature values ​​of the motor windings and bearings in the high-speed motor 22 in real time, and the vibration sensor 32 is used to monitor the vibration values ​​of sensitive parts of the high-speed motor 22 in real time.

[0056] like Figure 3 and Figure 4 As shown, both temperature sensor 31 and vibration sensor 32 are connected to the electrical control box 4, which is connected to the high-speed motor control cabinet 21. The electrical control box 4 is used to control the motor air-cooling component to cool down when the temperature value of the motor windings and bearings is higher than the corresponding threshold, and to control the high-speed motor 22 to shut down and issue an alarm when the vibration value of the sensitive parts of the motor is higher than the corresponding threshold.

[0057] It should be noted that the motor air-cooling component can be set as a fan, using air ducts to cool the main body of the high-speed motor 22.

[0058] As another implementation method of the control system, such as Figure 2 and Figure 3 As shown, it also includes a wear displacement measuring component, which includes a grating ruler 33 set on the upright plate 11 and a reading head set on the power arm 122 of the lever 12. The grating ruler 33 is connected to the electrical control box 4 and is used to detect the downward displacement of the reading head and send it to the electrical control box 4.

[0059] The reading head is fixed to the lever 12, which is integrated with the pin sample 155, and the grating ruler 33 is fixed to the vertical plate 11. The reading head can move relative to the grating ruler 33 with the help of the lever 12. When the pin sample 155 is worn, under the action of the loading force, the power arm 122 of the lever 12 will move upward by a certain displacement. At this time, the reading head moves upward with the power arm 122, and the accurate upward displacement is read by the grating ruler 33. The grating ruler 33 has high displacement measurement accuracy and strong anti-interference ability, thus enabling real-time detection of the wear amount of the pin sample 155.

[0060] As another implementation method of the control system, such as Figure 4 As shown, it also includes a purified voltage regulator 5 and a terminal 6. The input terminal of the purified voltage regulator 5 is connected to a 220V power supply, and the output terminal supplies power to the electrical control box 4 and the terminal 6. The electrical control box 4 has a power switch on its panel for controlling its opening and closing.

[0061] After connecting the power supply of the testing machine, rotate the "Power On" button on the panel of the high-speed motor control cabinet 21 to turn on the high-speed motor power supply; then press the purification voltage regulator switch, the electrical control box power switch and the terminal switch in sequence; after the terminal 6 is turned on, the electrical control box 4 will send the acquired monitoring information to the terminal 6, and the terminal 6 will perform corresponding operations based on the monitoring information.

[0062] Based on the above-mentioned control system for a friction and wear testing machine, this application also discloses a control method for a friction and wear testing machine.

[0063] As one implementation of the control method, the steps include:

[0064] 100. Obtain the setting parameters and measurement parameters of the testing machine and display them on the terminal screen; among them, the setting parameters include test radius, test duration, test force, friction torque and rotation speed; the measurement parameters include test time, loading force, friction torque, friction coefficient, motor current, motor voltage, sample displacement and linear velocity.

[0065] Specifically, the test force is the weight of the counterweights attached during the loading process; the loading force is the force applied to the pin sample, and under normal circumstances, the loading force is the same as the test force. The frictional torque is detected by a torque sensor. Since the magnitude of the frictional torque is proportional to the speed of the high-speed motor and the coefficient of friction, the coefficient of friction is obtained based on the frictional torque and the speed of the high-speed motor.

[0066] Motor current and voltage are detected by voltage and current acquisition sensors, sample displacement is detected by an optical grating ruler, and linear velocity is calculated from rotational speed and test radius, where linear velocity = rotational speed. Test radius 2.

[0067] 200. Generate motor current curves based on all motor currents during the test time, generate sample linear velocity curves based on all linear velocities during the test time, and generate loading force curves based on all loading forces during the test time.

[0068] It should be noted that the output power of a high-speed motor is reflected by the motor current, and the load changes during friction can be visually observed using the motor current curve. Since linear velocity equals rotational speed... Test radius 2. Although the linear velocity remains constant under the premise of setting the rotation speed and test radius, the linear velocity curve of the sample can allow users to intuitively understand the linear velocity.

[0069] Although the applied force refers to the set test force, there will be vibration during the friction process, so the applied force will change slightly. Therefore, it is necessary to use the applied force curve to display it.

[0070] In addition, when the test reaches the test duration or the set number of revolutions, the warning light on the terminal control display will light up and the testing machine will be stopped.

[0071] It should be noted that curves can be selected as needed, including speed curves, current curves, linear velocity curves, applied force curves, friction force curves, friction coefficient curves, temperature curves, pressure drop curves, etc.

[0072] At this point, the reset request is obtained; the terminal sends a data save dialog box to the display screen based on the reset request; according to the data save dialog box, a request to save the original data is obtained; based on the request to save the original data, the data storage path is selected, and the original test data is saved.

[0073] Specifically, when the test reaches the set duration or number of revolutions, the warning light on the terminal control display will illuminate, and the equipment will automatically stop. Clicking the "Reset" button below the warning light will bring up a data save dialog box on the display. To save the test data, click "Save Original Data," select the data storage path, and name the original test data. To avoid saving the test data, click "Discard" to return to the main page.

[0074] The terminal receives the report processing request and sends a report settings dialog box to the display screen based on the report processing request. The report settings dialog box includes the basic information of the test and the test setting parameters. The basic information of the test includes: product number, production batch number, testing department, sample delivery department, report number, test date, reporter, etc. The test setting parameters include test speed, test force, sample size, test time, etc.

[0075] In addition, the time interval can be set according to production needs. The "time interval" setting is the sampling interval when inputting text test data, with a minimum value of 1 second.

[0076] As another implementation of the control method, before each test, the speed should be tested under no-load conditions to ensure stable operation of the high-speed motor. The specific test method is as follows:

[0077] After clamping the sample and ensuring the high-speed motor is unloaded, start the high-speed motor. Then, set the speed to a small value. Once the speed reaches this set value, set a slightly larger value, and so on, increasing the speed incrementally until the desired speed is reached. Generally, an initial speed of 2000 r / min can be set. After reaching the set value, increase the speed by 1000 r / min each time until the desired speed is achieved. The maximum speed of the high-speed motor is the highest speed required for the test. This operation ensures that the motor can reach the required speed and operate stably during the test.

[0078] In addition, the zero point (the position where the highest point of the cam contacts the lever) needs to be repositioned before each test to ensure the accuracy of loading. First, find the zero point of the encoder, and after a 5-second interval, perform zero point positioning again. Since the encoder has rotated one revolution after 5 seconds, the position of the zero point can be determined. At this time, the servo motor starts and automatically positions the cam at the zero point.

[0079] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A control system for a friction and wear testing machine, characterized in that, include: A loading mechanism (1) for driving the pin sample (155) to move up and down is provided. The loading mechanism (1) includes a vertical plate (11) and a lever (12) mounted on the vertical plate (11) via a rotating shaft. One end of the lever (12) is provided with a mounting assembly (15) for mounting the pin sample (155). A cam assembly (14) for driving the pin sample (155) to move upward is provided on the vertical plate (11) and at the other end of the lever (12). A counterweight assembly (13) for driving the pin sample (155) to move downward is provided at the end of the lever (12) away from the mounting assembly (15). A power mechanism (2) for driving the rotation of the disk sample (24) includes a high-speed motor (22) and a fixing block (23) for mounting the disk sample (24), wherein the output shaft of the high-speed motor (22) is connected to the fixing block (23). The monitoring mechanism (3) includes a temperature sensor (31) and a vibration sensor (32). The temperature sensor (31) is used to monitor the temperature values ​​of the motor windings and bearings in the high-speed motor (22) in real time, and the vibration sensor (32) is used to monitor the vibration values ​​of sensitive parts of the high-speed motor (22) in real time. The electrical control box (4) is used to connect to the temperature sensor (31) and the vibration sensor (32). The electrical control box (4) is used to perform cooling treatment when the temperature value of the motor winding and bearing is higher than the corresponding threshold, and to control the high-speed motor (22) to shut down and issue an alarm when the vibration value of the sensitive part of the motor is higher than the corresponding threshold. The cam assembly (14) includes a cam (141), an encoder, and a servo motor. The servo motor is connected to the cam (141) via the encoder. The encoder is connected to the electrical control box (4). The electrical control box (4) is used to determine the rotation angle of the cam (141) based on the position signal of the encoder and to control the start and stop of the servo motor. The counterweight assembly (13) includes a fixed pulley (131) and a connecting rope (132) threaded on the fixed pulley (131). One end of the connecting rope (132) is connected to the lever (12), and the other end is connected to a weight tray (133) for placing the counterweight (134). The mounting assembly (15) includes a connecting seat (151) and a torque sensor (156) disposed on the connecting seat (151), the torque sensor (156) being connected to the lever (12), and the pin sample (155) being mounted on the connecting seat (151). The torque sensor (156) is connected to the electrical control box (4) and is used to detect the frictional torque on the pin sample (155) in real time and send it to the electrical control box (4); It also includes a wear displacement measuring component, which includes a grating ruler (33) set on the upright plate (11) and a reading head set on the lever (12). The grating ruler (33) is connected to the electrical control box (4) and is used to detect the downward displacement of the reading head and send it to the electrical control box (4).

2. The control system for a friction and wear testing machine according to claim 1, characterized in that: It also includes a purification and voltage regulation power supply (5), the input terminal of which is connected to a power supply, and the output terminal of which is connected to the electrical control box (4).

3. A control method for a friction and wear testing machine, characterized in that: The control system of the friction and wear testing machine according to any one of claims 1-2; the control method includes: Obtain the setting parameters of the testing machine; wherein, the setting parameters include the test radius, test duration, test force, friction torque, and rotational speed; The measurement parameters of the testing machine are obtained based on the set parameters, wherein the measurement parameters include test time, loading force, motor current and linear velocity; Motor current curves are generated based on all motor currents during the test period, sample linear velocity curves are generated based on all linear velocities during the test period, and loading force curves are generated based on all loading forces during the test period.

4. The control method for a friction and wear testing machine according to claim 3, characterized in that, Also includes: When the test reaches the test duration or the set number of revolutions, the warning light on the control display will illuminate, and the testing machine will be stopped.

5. The control method for a friction and wear testing machine according to claim 4, characterized in that, The automatic shutdown procedure of the testing machine also includes: Obtain a reset request; A data save dialog box is sent to the display screen based on the reset request; According to the data save dialog box, collect the request to save the original data; Based on the request to save the original data, a data storage path is selected, and the original experimental data is saved.

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