Device and method for testing ice friction coefficient of ice-resistant and wear-resistant paint

Abstract

The invention provides an ice-resistant wear-resistant coating ice friction coefficient testing device and a testing method.The device comprises a low-temperature environment testing box, a transmission rod assembly and a magnetic attraction switch, one end of the transmission rod assembly is connected with a driving mechanism, and the other end of the transmission rod assembly extends into the low-temperature environment testing box and is connected with a to-be-tested plate through the magnetic attraction switch; the to-be-tested plate is in contact with ice blocks, and one surface, in contact with the ice blocks, of the to-be-tested plate is coated with an ice-resistant and wear-resistant coating. According to the testing device, the static friction coefficient and the dynamic friction coefficient of the coating can be tested in a low-temperature environment, a to-be-tested plate can be clamped more firmly and different sample plates can be replaced quickly in the low-temperature environment due to the arrangement of a magnetic attraction switch, damage to a coating layer is avoided, and the tested data are accurate and high in precision; according to the test method, the influence of different ice such as ice layer thickness, fresh seawater ice and freezing time on the static friction coefficient and the dynamic friction coefficient can be tested, and the test method has a great application prospect.

Description

Technical Field

[0001] The present invention relates to the technical field of friction coefficient testing, and in particular to an ice friction coefficient testing device and a testing method for ice-resistant and wear-resistant coatings. Background Art

[0002] The polar climate is extremely harsh, with low temperatures and lots of ice all year round. Polar ships not only have to endure the friction and wear of floating ice of different sizes and hardness during navigation, but also have to withstand the impact of the ice layer on the hull, which increases fuel consumption and may also cause the coating material on the hull surface to fall off, accelerating the corrosion of the hull. Therefore, polar ships usually use special anti-ice and wear-resistant coatings on the hull above and below the waterline, which protects the hull structure while effectively reducing the friction between the hull and the floating ice, preventing the icebreaker from being stuck in the floating ice. The tangential contact force generated when the ice layer contacts the hull is proportional to the friction coefficient between the ice layer and the coating. In order to reduce resistance, the surface of the anti-ice and wear-resistant coating is required to have a low ice friction coefficient.

[0003] Chinese patent CN 217033560 U reports a thermoplastic elastic polyurethane friction coefficient tester on ice surface. The tester can measure the friction coefficient of block solids on ice surface, but is not suitable for thin coating samples. The ice surface is not polished, which will affect the accuracy of each measurement. Chinese patent CN 116380780 A adapts to the fluctuations caused by the uneven ice surface through floating connection, solving the problem of pressure fluctuations and inaccurate ice friction coefficient measurement caused by the uneven ice surface. This solution will cause damage to the ice surface after each test, and the ice surface repair treatment method is not clear. The floating connection will cause the accuracy of the dynamometer data recording, affecting the measurement accuracy. Chinese patent CN 110346278 realizes the measurement of the dynamic friction coefficient between the model ice and the hull surface by sliding the model ice on the ship model. This method can only realize the measurement of the dynamic friction coefficient, and the hull surface and ice surface are not surface treated. The ambient temperature is uncontrollable and is not suitable for the accurate measurement of the ice friction coefficient of the coating in a low temperature environment.

[0004] In view of this, this application is hereby filed. Summary of the invention

[0005] In view of this, the present invention aims to provide an ice friction coefficient test device and test method for ice-resistant wear-resistant coatings, so as to solve the problems in the prior art that only thick plates can be tested but thin plates cannot be tested, static friction coefficient and dynamic friction coefficient cannot be tested simultaneously, and the accuracy of test data is poor.

[0006] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0007] A device for testing the ice friction coefficient of an anti-ice and wear-resistant coating comprises a low-temperature environment test chamber, a transmission rod assembly, and a magnetic switch, wherein one end of the transmission rod assembly is connected to a driving mechanism, and the other end of the transmission rod assembly extends into the low-temperature environment test chamber and is connected to a plate to be tested via a magnetic switch, the plate to be tested contacts an ice cube, and the side of the plate to be tested that contacts the ice cube is coated with an anti-ice and wear-resistant coating.

[0008] In this setting, the static friction coefficient and dynamic friction coefficient of the anti-ice and wear-resistant coating can be tested in a low-temperature environment. The magnetic switch can clamp the test plate more firmly, while also avoiding damage to the coating layer, so that the test data is not only accurate but also highly precise. Finally, the device of the present invention can test the friction coefficient of both thin plates and thick plates.

[0009] Furthermore, the driving mechanism includes a fixed block, a connecting plate, a friction test sensor, and a driving member, wherein the fixed block is connected to the transmission rod assembly, the fixed block is connected to the friction test sensor, the friction test sensor is connected to the driving member, and the connecting plate is connected to the driving member.

[0010] Furthermore, it also includes a control box and a support part, the control box is arranged on the support part, and the driving mechanism is connected to the control box.

[0011] Furthermore, a baffle is provided on the control box, and the baffle is located at the end of the control box and away from the magnetic switch.

[0012] Furthermore, the transmission rod assembly includes an elastic part, a first nut, a transmission rod, and a fixing part. The transmission rod is connected to the elastic part and the first nut. One end of the transmission rod connected to the elastic part is connected to the fixing block, and the other end of the transmission rod is connected to the fixing part. A second nut is provided on the fixing part, and the transmission rod passes through the second nut. When the magnetic switch is turned on, the fixing part, the transmission rod and the magnetic switch are selectively connected.

[0013] Furthermore, the openings of the first nut and the second nut are M8 threaded openings.

[0014] Furthermore, a low temperature zone is provided in the low temperature environment test box, a placing table is installed in the low temperature zone, ice cubes are placed on the placing table, and the test board is placed on the top surface of the ice cubes.

[0015] Furthermore, a through hole is provided on the low temperature environment test box, and one end of the transmission rod passes through the through hole and enters the low temperature environment test box.

[0016] This setting makes it difficult for the ice in the low temperature environment test box to melt, so that the surface of the ice is at the same level, so that the test data of the test board when moving on the ice is more accurate and higher in precision.

[0017] Furthermore, a telescopic foot cup is connected to the bottom of the placement table, so that the height of the placement table can be adjusted.

[0018] This setting can improve the accuracy and precision of friction coefficient measurement.

[0019] A method for testing the ice friction coefficient of an anti-ice and wear-resistant coating, using the above-mentioned testing device, comprises the following steps:

[0020] Step 1: Use the telescopic foot cup to adjust the height of the placement table so that the center of the magnetic switch and the center of the through hole are on the same horizontal line;

[0021] Step 2: Use a low-temperature environment test chamber to make ice cubes, process the ice cubes to make them flat, and place the ice cubes horizontally on the placement table;

[0022] Step 3: coating the anti-ice and wear-resistant coating on the test board, placing the test board on the ice surface, with one end coated with the anti-ice and wear-resistant coating in contact with the ice surface;

[0023] Step 4: Turn on the magnetic switch, attach the transmission rod and the board to be tested to the magnetic switch, and place them on the ice;

[0024] Step 5: Set the speed, load and stroke according to the test requirements, and then use the control box to control the test board to move in a uniform linear motion on the ice surface until the stroke ends;

[0025] Step 6: Record the first peak value of the test plate before it starts sliding, which is the static friction force; after the test plate moves to the specified stroke, calculate the static friction coefficient and sliding friction coefficient through software.

[0026] The setting directly clamps the test plate through a magnetic switch and moves on the ice layer in the low-temperature environment box, which can well simulate the sliding performance of the coating on the ice layer, thereby achieving the purpose of indoor evaluation of the ice friction coefficient of the anti-ice and wear-resistant coating. The test method of the present invention can reduce the number of times the door of the low-temperature environment test box is opened, shorten the test time, and improve the accuracy and precision of the test results.

[0027] Compared with the prior art, the ice friction coefficient test device and test method of the anti-ice and wear-resistant coating described in the present invention have the following advantages:

[0028] 1) The present invention makes an ice layer in an ice tank, quickly clamps and replaces the test plate through a magnetic switch, and can perform static friction and dynamic friction tests between the coating and ice under a certain low temperature environment, a certain vertical load, and a certain running speed;

[0029] 2) The testing device of the present invention can test the static friction coefficient and dynamic friction coefficient of the anti-ice and wear-resistant coating in a low temperature environment. The magnetic switch can more firmly clamp the test plate, while also avoiding damage to the coating layer, so that the test data is accurate and the precision is higher;

[0030] 3) The testing device of the present invention is used for testing the ice friction coefficient of anti-ice wear-resistant coatings, which can be used to evaluate the ice friction coefficient of anti-ice wear-resistant coatings, fill the domestic gap, provide strong support for the application of anti-ice wear-resistant coatings, and have a broad market application prospect;

[0031] 4) The present invention can study the effects of different anti-ice and wear-resistant coatings and different ice qualities on the dynamic and static friction coefficients;

[0032] 5) The testing method of the present invention can be used to study the dynamic and static friction coefficients of the same coating sample under different ambient temperatures, different ice layer flatness, ice layer height, ice layer thickness, fresh water and sea ice, etc.; or different samples can be used to study the dynamic and static friction coefficients of ice cubes under the same conditions; so that the data to be tested is only subject to the different conditions that need to be changed for change, which is more conducive to the study of data reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the overall structure of an ice friction coefficient test device for anti-ice and wear-resistant coatings of the present invention;

[0034] Figure 2 It is a structural schematic diagram of the magnetic switch of the present invention when absorbing the board to be tested;

[0035] Figure 3 The schematic diagram of the structure of the magnetic switch of the present invention when releasing the board to be tested

[0036] Figure 4 The structure of the ice friction coefficient test device for the anti-ice and wear-resistant coating of the present invention is shown in FIG. Figure 1 ;

[0037] Figure 5 The structure of the ice friction coefficient test device for the anti-ice and wear-resistant coating of the present invention is shown in FIG. Figure 2 ;

[0038] Figure 6 It is a structural schematic diagram of the magnetic switch of the present invention.

[0039] Description of reference numerals:

[0040] 1- low temperature environment test box, 11- placing table, 111- telescopic foot cup, 12- through hole, 2- control box, 21- baffle, 3- support part, 4- transmission rod assembly, 41- elastic member, 42- first nut, 43- transmission rod, 44- fixing member, 441- second nut, 5- magnetic switch, 51- cast iron block, 511- first surface, 512- second surface, 52- brass block, 53- electrical soft iron, 54- permanent magnet, 541- rotary button, 55- annular cavity, 6- plate to be tested, 7- ice cube, 8- driving mechanism, 81- fixing block, 82- connecting plate, 83- friction test sensor, 84- driving member. DETAILED DESCRIPTION

[0041] In order to make the above-mentioned objects, features and advantages of the present invention more clearly understood, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In addition, the directions involved in the following specific embodiments are briefly described: the directions or positional relationships indicated by "up", "down", "left" and "right" mentioned in the embodiments refer to the directions or positional relationships shown in the accompanying drawings.

[0042] like Figures 1 to 6 As shown, the present invention relates to an ice friction coefficient testing device for anti-ice and wear-resistant coatings, comprising a low-temperature environment test box 1, a control box 2, a support part 3, a transmission rod assembly 4, and a magnetic switch 5. One end of the transmission rod assembly 4 is connected to a driving mechanism 8, and the other end of the transmission rod assembly 4 extends into the low-temperature environment test box 1 and is connected to a test plate 6 through the magnetic switch 5. The test plate 6 is in contact with ice cubes, and the side of the test plate in contact with the ice cubes is coated with anti-ice and wear-resistant coatings. The control box 2 is arranged on the support part 3, and the driving mechanism 8 is connected to the control box 2.

[0043] The present invention simulates the friction movement of the coating on the ice surface by setting different speeds and sample loads in a controllable low-temperature environment, thereby achieving the purpose of evaluating the friction coefficient performance between the coating and the ice layer.

[0044] More specifically, the low temperature environment test box is mainly made of low temperature resistant materials. The low temperature environment test box includes a refrigerator, a temperature and humidity sensor, etc., and the temperature can be controlled by a temperature control panel, and the temperature adjustment range is -40°C--150°C. The low temperature environment test box is a prior art and will not be described in detail here.

[0045] Specifically, the driving mechanism 8 includes a fixed block 81, a connecting plate 82, a friction test sensor 83, and a driving member 84. The fixed block 81 is connected to the transmission rod assembly 4, the fixed block 81 is connected to the friction test sensor 83, the friction test sensor 83 is connected to the driving member 84, and the connecting plate 82 is connected to the driving member 84.

[0046] The driving member in this embodiment can control the horizontal movement of the transmission rod assembly, and can set the movement speed and travel range. The movement process of the driving member controlling the transmission rod assembly is prior art and will not be described in detail here.

[0047] Specifically, the transmission rod assembly 4 includes an elastic member 41, a first nut 42, a transmission rod 43, and a fixing member 44. The transmission rod is connected with the elastic member 41 and the first nut 42. One end of the transmission rod 43 connected to the elastic member 41 is connected to the fixing block 81, and the other end of the transmission rod 43 is connected to the fixing member 44. A second nut 441 is provided on the fixing member 44, and the transmission rod passes through the second nut. When the magnetic switch is turned on, the fixing member, the transmission rod and the magnetic switch are selectively connected.

[0048] Preferably, the openings of the first nut and the second nut are M8 threaded openings. Preferably, the elastic member is a spring. The purpose of setting the elastic member, the first nut and the second nut is to improve the stability of the movement of the transmission rod and improve the accuracy of the test results. The elastic member is also used to protect the friction test sensor.

[0049] Preferably, the fixing piece is a 50*50mm stainless steel sheet.

[0050] Specifically, the low temperature environment test box 1 is provided with a through hole 12, and one end of the transmission rod 43 passes through the through hole 12 and enters the low temperature environment test box 1. This can not only realize the movement of the transmission rod, but also ensure that the ice cubes are always kept at a low temperature, the ambient temperature between the ice cubes and the coating is more stable, the test is more accurate, and the precision is higher.

[0051] More specifically, the through hole has a diameter of 80-120 mm, preferably 100 mm.

[0052] More specifically, the magnetic switch 5 includes two symmetrical cast iron blocks 51, the two cast iron blocks 51 form an annular cavity 55, and the permanent magnet 54 is located in the annular cavity. The magnetic switch of the present invention can not only adapt to low temperature environments, but also quickly replace the board to be tested, reduce the number of times the door of the low temperature environment test box is opened and closed, and the measurement data accuracy is higher.

[0053] More specifically, the two cast iron blocks 51 are connected by a brass block 52, and the inner rings of the two cast iron blocks 51 are connected with electrical soft iron 53, and the two ends of the electrical soft iron are in close contact with the brass block, and the two ends of the permanent magnet 54 are respectively located on the inner rings of the two electrical soft irons, and the permanent magnet 54 is provided with a rotating button 541, and the setting of the rotating button realizes the suction and release of the test plate. By replacing magnetic switches of different sizes or increasing or decreasing the load on the magnetic switch, different sample loads can be simulated.

[0054] More specifically, the magnetic switch is selected to be 4T or 6T.

[0055] More specifically, the inner sides of the cast iron block, the brass block, and the electrical soft iron form a circular structure, which allows the permanent magnet 54 to rotate.

[0056] More specifically, the cast iron block 51 includes a first surface 511 and a second surface 512, wherein the first surface is in contact with the plate to be tested. Preferably, the second surface is at a certain angle to the first surface, and the obtuse angle formed is 150-160°, which ensures that the magnetic switch can not only clamp thick plates to be tested, but also thin plates.

[0057] In this embodiment, the magnetic switch is used to absorb and put down the board to be tested. The specific method of use is: rotate the rotary button, the magnetic switch loses magnetism, the board to be tested and the transmission rod are separated from the magnetic switch, and the transmission rod is reset. The ice surface is not damaged during the reset process. When starting the test, the magnetic switch is used to absorb the sample to be tested and placed on the ice layer.

[0058] Specifically, a low temperature zone is provided in the low temperature environment test box 1, and a placing table 11 is installed in the low temperature zone. An ice making trough can be placed on the placing table 11 for making ice cubes. During the experiment, ice cubes 7 are placed on the placing table, and the test plate 6 is placed on the ice cubes 7.

[0059] In this embodiment, a retractable foot cup 111 is connected to the bottom of the placement table 11, so that the height of the placement table can be adjusted.

[0060] More specifically, the center of the through hole is at the same height as the center of the magnetic switch and the friction test sensor.

[0061] More specifically, a baffle 21 is provided on the control box 2. The baffle 21 is located at the end of the control box 2 and limits the transmission rod.

[0062] In this embodiment, the friction force is measured by a friction test sensor, according to the formula F=μN; F: friction force (tension) μ: friction coefficient N: positive pressure N=mg (here is the weight of the test plate + the weight of the magnetic switch + the weight of the transmission rod / 2 + the weight of the fixing part), that is, μ=F / N, μ=F / mg.

[0063] The present invention also provides a method for testing the ice friction coefficient of an anti-ice and wear-resistant coating, comprising the following steps:

[0064] Step 1: First determine the height of the placement table, the height of the ice cube, the center height of the magnetic switch, the height of the through hole, and the height of the board to be tested; use the telescopic foot cup to adjust the height of the placement table so that the center of the magnetic switch and the center of the through hole are on the same horizontal line;

[0065] Step 2: Place the ice trough in the test box and slide the upper and lower ice system with the ice surface facing up; observe the level to adjust the ice trough to a horizontal state, use the ice surface polishing assembly to polish the ice surface, and spray a small amount of water on the ice surface until the ice surface flatness reaches 0.2mm, and place the ice cubes horizontally on the placement table;

[0066] Step 3: According to the coating matching requirements, prepare a certain thickness of anti-ice and wear-resistant coating on the steel substrate to obtain a test plate, check the surface state of the test plate, and select a part with a flat surface and no paint film defects such as pinholes or pits for testing; place the test plate on the ice surface, and the end coated with the anti-ice and wear-resistant coating is in contact with the ice surface;

[0067] Step 4: Turn on the magnetic switch, attach the transmission rod and the board to be tested to the magnetic switch, and place them on the ice;

[0068] Step 5: Set the speed, load and stroke according to the test requirements, and then control the test board to move in a uniform linear motion on the ice surface through the system control program until the stroke ends;

[0069] Step 6: Record the first peak value of the test plate before it starts sliding, which is the static friction force; after the test plate moves to the specified stroke, calculate the static friction coefficient and sliding friction coefficient through software.

[0070] After the test is completed, the dynamic friction, dynamic friction coefficient, average dynamic friction coefficient, static friction, static friction coefficient, and average static friction coefficient of this test are recorded according to the display on the friction tester panel.

[0071] After the test is completed, click Return to return the board to its initial position and repeat the test; or after returning to its initial position, turn off the magnetic switch, remove the board to be tested, replace it with a new board to perform ice friction tests on different boards.

[0072] After all tests are completed, the test chamber temperature can be raised to 50-70°C, and after drying for 10 minutes, all power supplies of the test chamber can be turned off; confirm that all components are dry and free of moisture. Wait for the ice cubes to melt by self-heating, open the ice tank drain, and drain the water to the test chamber drain.

[0073] The test method for the ice friction coefficient of the anti-ice and wear-resistant coating provided by the present invention can couple and regulate multiple test parameters such as the movement speed, load, stroke, ambient temperature, etc. of the test plate to obtain an accurate and reliable ice friction coefficient evaluation test method.

[0074] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention.

[0075] (1) The anti-ice and wear-resistant coating of Luoyang Ship Material Research Institute (the 725th Research Institute of China Shipbuilding Industry Corporation) was selected. According to the coating matching requirements, the coating sample was coated on a 150mm×75mm×3mm steel substrate with a coating thickness of 5mm, and then cured under standard conditions until it met the requirements;

[0076] (2) Check the surface condition of the sample to ensure there are no paint film defects such as pinholes or pits;

[0077] (3) The test was carried out using an ice friction coefficient test device that had been adjusted to meet the requirements, with a fixed load of 180 g, a stroke of 100 mm, and a speed of 200 mm / min. The tensile force of the sample before and during sliding was recorded, and the static friction coefficient and sliding friction coefficient were calculated using software. The test results are shown in Table 1.

[0078] Table 1 Test results of static and dynamic friction coefficient

[0079] Serial number Static friction coefficient Dynamic friction coefficient 1 0.245 0.099 2 0.206 0.082 3 0.202 0.076 average value 0.218 0.086

[0080] (4) Set the fixed load to 240g, the speed to 200mm / min, and the stroke to 100mm to carry out the test; record the tensile force of the sample before and during sliding, and calculate the static friction coefficient and sliding friction coefficient through the software. The test results are shown in Table 2.

[0081] Table 2 Test results of static and dynamic friction coefficient

[0082] Serial number Static friction coefficient Dynamic friction coefficient 1 0.248 0.084 2 0.216 0.095 3 0.234 0.093 average value 0.233 0.091

[0083] It can be seen from the above test that by setting different test parameters to test the static and dynamic friction coefficients of the same coating, the test is repeated many times, the results are accurate, the static and dynamic friction coefficients between the coating and the ice surface are measured, and the operation is simple. Therefore, the ice friction coefficient test device and test method of the anti-ice and wear-resistant coating of the present invention are effective, and the test parameters can be set according to different test conditions to examine the anti-ice and wear-resistant properties of different materials.

[0084] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the scope defined by the claims.

Claims

1. An ice friction coefficient test device for anti-ice and wear-resistant coatings, characterized in that: The invention comprises a low temperature environment test box (1), a transmission rod assembly (4), and a magnetic switch (5), wherein one end of the transmission rod assembly (4) is connected to a driving mechanism (8), and the other end of the transmission rod assembly (4) extends into the low temperature environment test box (1) and is connected to a test plate (6) through the magnetic switch (5), wherein the test plate (6) contacts an ice cube, and a side of the test plate (6) in contact with the ice cube is coated with an anti-ice and wear-resistant coating.

2. The testing device according to claim 1, characterized in that: The driving mechanism (8) comprises a fixed block (81), a connecting plate (82), a friction test sensor (83), and a driving member (84); the fixed block (81) is connected to the transmission rod assembly (4); the fixed block (81) is connected to the friction test sensor (83); the friction test sensor (83) is connected to the driving member (84); and the connecting plate (82) is connected to the driving member (84).

3. The testing device according to claim 2, characterized in that: It also comprises a control box (2) and a support part (3), wherein the control box (2) is arranged on the support part (3), and the driving mechanism (8) is connected to the control box (2).

4. The testing device according to claim 3, characterized in that: The control box (2) is provided with a baffle (21), and the baffle (21) is located at the end of the control box (2) and away from the magnetic switch (5).

5. The testing device according to claim 3, characterized in that: The transmission rod assembly (4) comprises an elastic member (41), a first nut (42), a transmission rod (43), and a fixing member (44); the transmission rod (43) is connected with the elastic member (41) and the first nut (42); one end of the transmission rod (43) connected to the elastic member (41) is connected to a fixing block (81); the other end of the transmission rod (43) is connected to the fixing member (44); a second nut (441) is provided on the fixing member (44); the transmission rod passes through the second nut (441); when the magnetic switch (5) is turned on, the fixing member (44), the transmission rod (43) and the magnetic switch (5) are selectively connected.

6. The testing device according to claim 5, characterized in that: The openings of the first nut (42) and the second nut (441) are M8 threaded openings.

7. The testing device according to claim 1, characterized in that: The low temperature environment test box (1) is provided with a low temperature zone, a placement table (11) is installed in the low temperature zone, ice blocks (7) are placed on the placement table (11), and a test plate (6) is placed on the top surface of the ice blocks (7).

8. The testing device according to claim 7, characterized in that: The bottom of the placement platform (11) is connected to a telescopic foot cup (111), and the height of the placement platform (11) can be adjusted.

9. The testing device according to claim 1, characterized in that: The low temperature environment test box (1) is provided with a through hole (12), and one end of the transmission rod (43) passes through the through hole (12) and enters the low temperature environment test box (1).

10. A method for testing the ice friction coefficient of an anti-ice and wear-resistant coating, using the testing device according to any one of claims 1 to 9, comprising the following steps: Step 1: Use the telescopic foot cup to adjust the height of the placement table so that the center of the magnetic switch and the center of the through hole are on the same horizontal line; Step 2: Use a low temperature environment test box to make ice and process the ice cubes to achieve a certain degree of flatness; Step 3: coating the anti-ice and wear-resistant coating on the test board, placing the test board on the ice surface, with one end coated with the anti-ice and wear-resistant coating in contact with the ice surface; Step 4: Turn on the magnetic switch, attach the transmission rod and the board to be tested to the magnetic switch, and place them on the ice; Step 5: Set the speed, load and stroke according to the test requirements, and then control the test board to move in a uniform linear motion on the ice surface through the system control program until the stroke ends; Step 6: Record the first peak value of the test plate before it starts sliding, which is the static friction force; after the test plate moves to the specified stroke, calculate the static friction coefficient and sliding friction coefficient through software.

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