A coating wear resistance testing device

Abstract

The present invention relates to the technical field of detection devices, and in particular to a device for testing the wear resistance of a coating, comprising a test bench, a turntable and a test section. The test section is mounted on the test bench and is located above the turntable. The test section comprises a grinding chain, which is mounted on the test bench so as to be rotatable around its own axis. The grinding chain comprises a plurality of grinding wheels, which are respectively rotatable around their own axes. A device for testing the wear resistance of a coating of the present invention is configured to arrange a turntable and a test section on the test bench, so that the entire grinding chain rotates during the test of the sample, switches the contact position between the grinding wheel and the sample, ensures the uniformity of the grinding of the sample by the grinding wheel, and changes the distance from each point on the grinding wheel to the center of the turntable, ultimately making the degree of wear of each point on the grinding wheel tend to be consistent, improving the uniformity of the wear of the grinding wheel, and extending the service life of the grinding wheel.

Description

Technical Field

[0001] The present invention relates to the technical field of detection devices, and in particular to a device for testing the wear resistance of coatings. Background Art

[0002] A coating's wear resistance refers to its ability to withstand external forces such as friction and abrasion. It is a key indicator of a coating's durability and other performance characteristics, primarily determined by factors such as the coating matrix, additives, and application process. A coating's wear resistance directly impacts its lifespan and maintenance costs, so it's essential to test the coating's wear resistance before actual application.

[0003] An abrasion tester is a specialized device used to test the wear resistance of surfaces such as coatings and printed ink layers. By simulating friction and wear, it assesses a coating's ability to withstand external forces. It is a crucial testing tool for coating durability and printed product quality. Typically consisting of a rotating table, grinding wheel, and pressure adjustment mechanism, an abrasion tester can precisely measure a sample's wear resistance by adjusting parameters such as grinding wheel pressure and rotational speed.

[0004] Chinese patent CN217586770U discloses a paint wear resistance test device. The device is equipped with a rotating table, a grinding wheel and other structures. During the test, the sample to be tested is fixed on the rotating table, and the grinding wheel is pressed onto the test plate. The rotating table drives the grinding wheel to rotate, and the wear resistance is measured based on the number of rotations of the rotating table and the degree of wear of the sample. However, in this scheme, the grinding wheel is arranged perpendicular to the rotating table. This means that when the grinding wheel rotates around its own axis, the distance from the grinding wheel to the center of the rotating table is not the same. This makes the linear speed of the grinding wheel inconsistent, which ultimately leads to inconsistent wear of the grinding wheel. Uneven wear of the grinding wheel not only shortens the service life of the grinding wheel and increases equipment maintenance costs, but also causes deviations in the test data, affecting the accuracy of the wear resistance test. Summary of the Invention

[0005] The present invention provides a device for testing the wear resistance of coatings, so as to solve the problem that the wear degree of the grinding wheel of the existing wear resistance testing device is inconsistent during use, which leads to a shortened service life of the grinding wheel and a deviation in the test data.

[0006] A device for testing the wear resistance of a coating according to the present invention adopts the following technical solution: a device for testing the wear resistance of a coating, comprising a test bench, a turntable and a test section; the axis of the turntable is arranged in a vertical direction and can be mounted on the test bench so as to rotate around its own axis, and a sample is arranged on the turntable; the test section is mounted on the test bench and is located above the turntable; the test section comprises a grinding chain, which can be mounted on the test bench so as to rotate around its own axis, and the axis direction of the grinding chain is referred to as a first direction, which is a horizontal direction; the grinding chain comprises a plurality of grinding wheels, which are connected end to end in sequence around the first direction to form a closed annular structure, and the plurality of grinding wheels can be respectively arranged so as to rotate around their own axes, and the axes of the grinding wheels are in the tangential direction of the grinding chain, and the axes of the plurality of grinding wheels are evenly distributed in the circumferential direction of the grinding chain; the grinding wheel close to one side of the turntable in the vertical direction can contact the sample, and the rotation of the turntable around its own axis can drive the grinding wheel in contact with the sample to rotate around its own axis.

[0007] Furthermore, the grinding chain also includes multiple connecting parts, multiple grinding wheels and multiple connecting parts are evenly distributed on the test bench around the first direction, and the grinding wheels and connecting parts are alternately distributed in sequence around the first direction; the connecting parts include a connecting rod, the axis of the connecting rod is perpendicular to the axis of the grinding wheel, and the multiple connecting rods are all arranged to be able to revolve and rotate around the first direction; each grinding wheel is provided with a rotating rod, the rotating rod is coaxially arranged and rotatably matched with the corresponding grinding wheel, and a rotating ring is provided at both ends of the rotating rod, which is rotatably matched with the connecting rod arranged adjacent to it around the first direction.

[0008] Furthermore, the testing part also includes a mounting frame and a transmission member. The mounting frame is arranged on the testing table, and the transmission member is installed on the mounting frame. The transmission member is used to drive the multiple connecting rods to revolve around the first direction.

[0009] Furthermore, the mounting bracket can be mounted on the test bench so as to be rotatable about a second direction, where the second direction is horizontal and perpendicular to the first direction.

[0010] Furthermore, the mounting frame includes two base plates; the transmission member includes two coaxial double gears, which are arranged side by side in the second direction and are both arranged along the first direction; the two coaxial double gears are both rotatably installed between the two base plates, and the two gears of the coaxial double gears are respectively provided with multiple rotation grooves, and the multiple rotation grooves are evenly distributed on the outer peripheral wall surface of the corresponding gears, and the connecting rod can be engaged with the rotation grooves.

[0011] Furthermore, the transmission part also includes two transmission chains; the transmission chain is annular, and the transmission chain is arranged in a one-to-one correspondence with the substrate. The transmission chain is arranged along the first direction on the corresponding substrate and can rotate around its own axis, and the two transmission chains are arranged face to face in the first direction; the two ends of the connecting rod in the first direction are respectively connected to the two transmission chains, and the transmission chain can rotate synchronously with the connecting rod.

[0012] Furthermore, the grinding wheel close to one side of the turntable in the vertical direction can move up and down.

[0013] Furthermore, both substrates are provided with adjusting parts, which include an elastic band and two adjusting groups. The elastic band is located between the two substrates and is fixedly connected to the substrates corresponding to them; the elastic band is an annular structure, and an annular slide is provided on the elastic band, and multiple connecting rods are slidably installed in the slide; the two sides of the elastic band in the vertical direction are respectively called the first side and the second side, and the first side is located above the second side; the adjusting group includes an adjusting wheel and a tensioning wheel, which are respectively located on the upper and lower sides of the second side and are both in contact with the second side, and in the second direction, the two tensioning wheels are located between the two adjusting wheels, the adjusting wheel can move in the second direction, and the tensioning wheel can move up and down, so that the elastic band always remains tensioned.

[0014] Furthermore, a suction pipe and an air pump are provided on the test bench. The suction pipe is connected to the air pump, and in the vertical direction, one end of the suction pipe away from the air pump is located between the grinding wheel and the turntable.

[0015] Furthermore, the multiple grinding wheels in the grinding chain are divided into multiple grinding groups, each grinding group includes multiple grinding wheels, and the number of grinding wheels in each grinding group is different.

[0016] The beneficial effects of the present invention are as follows: a device for testing the wear resistance of a coating of the present invention arranges a turntable and a testing part on the test table, and during the process of testing the sample, the entire grinding chain is rotated, and the contact position of the grinding wheel and the sample is switched, thereby ensuring the uniformity of the grinding of the sample by the grinding wheel while changing the distance from each point on the grinding wheel to the center of the turntable. By continuously adjusting the position of the grinding wheel on the turntable, the distance from each point on the grinding wheel to the center of the turntable changes dynamically, and the linear speed differences offset each other, ultimately making the degree of wear of each point on the grinding wheel tend to be consistent, thereby improving the uniformity of the grinding wheel wear, extending the service life of the grinding wheel, and improving the accuracy of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 A schematic diagram of the overall structure of an embodiment of a device for testing the wear resistance of a coating according to the present invention;

[0019] Figure 2A schematic diagram of a partial structure of a testing portion of an embodiment of a device for testing the wear resistance of a coating according to the present invention;

[0020] Figure 3 A side view of the overall structure of an embodiment of a device for testing the wear resistance of a coating according to the present invention;

[0021] Figure 4 for Figure 3 Cross-sectional view along the middle line AA;

[0022] Figure 5 for Figure 4 Enlarged view of point C in the middle;

[0023] Figure 6 for Figure 3 Cross-sectional view along the middle edge BB;

[0024] Figure 7 for Figure 6 Enlarged view of point D in the middle;

[0025] Figure 8 A rear view of the overall structure of an embodiment of a device for testing the wear resistance of a coating according to the present invention;

[0026] Figure 9 for Figure 8 Cross-sectional view along the middle edge EE;

[0027] Figure 10 for Figure 9 Enlarged view of point F in the middle;

[0028] Figure 11 A front view of the overall structure of an embodiment of a device for testing the wear resistance of a coating according to the present invention;

[0029] Figure 12 for Figure 11 Enlarged view of point G in the middle;

[0030] Figure 13 This is a schematic diagram of the connection between the grinding wheel and the connecting rod of an embodiment of a device for testing the wear resistance of a coating according to the present invention.

[0031] In the figure: 100, test bench; 110, suction pipe; 120, air blowing pipe; 200, turntable; 300, test section; 310, grinding chain; 311, grinding wheel; 312, connecting rod; 313, rotating rod; 314, swivel; 320, mounting frame; 321, base plate; 322, limit rod; 323, counterweight; 324, handle; 330, transmission member; 331, coaxial double gear; 332, rotating groove; 333, transmission chain; 340, adjusting member; 341, elastic belt; 342, adjusting wheel; 343, tensioning wheel; 344, bidirectional screw; 345, first elastic member; 346, mounting rod. DETAILED DESCRIPTION

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] An embodiment of a coating wear resistance testing device of the present invention is as follows Figures 1 to 13 shown.

[0034] A device for testing the wear resistance of coatings includes a test bench 100, a turntable 200, and a testing unit 300. The turntable 200 is a circular platform. The turntable 200 is vertically oriented and mounted on the test bench 100 so as to be rotatable about its axis. A sample is mounted on the turntable 200 and rotates synchronously with the turntable 200.

[0035] The testing section 300 is mounted on the testing table 100 and positioned above the turntable 200. The testing section 300 includes a grinding chain 310, which is mounted on the testing table 100 so as to be rotatable about its own axis. The axis of the grinding chain 310 is referred to as the first direction, which is the horizontal direction. The grinding chain 310 includes a plurality of grinding wheels 311, which are connected end-to-end in a closed annular structure about the first direction. The grinding wheels 311 are each rotatable about their own axes, with the axes of the grinding wheels 311 tangential to the grinding chain 310 and the axes of the grinding wheels 311 evenly distributed circumferentially around the grinding chain 310. The grinding wheels 311 located vertically closer to the turntable 200 are capable of contacting the sample, and rotation of the turntable 200 about its own axis drives the grinding wheels 311 in contact with the sample to rotate about their own axes.

[0036] This embodiment utilizes a turntable 200 and a testing unit 300 mounted on a test bench 100. During use, a sample to be tested is placed on the turntable 200, and a grinding wheel 311 positioned vertically adjacent to the turntable 200 is brought into contact with the sample. The turntable 200 is then driven to rotate about its axis. The rotation of the turntable 200 generates a tangential force that drives the grinding wheel 311 in contact with it to rotate. The rotation of the grinding wheel 311, in contact with the sample, causes the sample to be abraded, thereby performing a test.

[0037] During the test of the sample, the entire grinding chain 310 is rotated, the position of the grinding wheel 311 in contact with the sample is switched, and the distance from each point on the grinding wheel 311 to the center of the turntable 200 is changed while ensuring the uniformity of the grinding of the sample by the grinding wheel 311. Figure 9 and Figure 10 As shown, taking one of the grinding wheels 311 as an example, with the center of the turntable 200 as the dividing point, when the grinding chain 310 rotates and drives the grinding wheel 311 to revolve, causing the grinding wheel 311 to move from left to right, when the grinding wheel 311 moves to the left of the center, the linear velocity of the left end surface of the grinding wheel 311 will be greater than the linear velocity of the right end surface of the grinding wheel 311. When the grinding wheel 311 moves to the right of the center, the linear velocity of the right end surface of the grinding wheel 311 will be greater than the linear velocity of the left end surface of the grinding wheel 311. As a result, the grinding wheel 311 wears more evenly after moving from the left to the right. That is, by continuously adjusting the position of the grinding wheel 311 on the turntable 200, the distance from each part of the grinding wheel 311 to the center of the turntable 200 changes dynamically, and the linear velocity differences offset each other, ultimately making the degree of wear of each part of the grinding wheel 311 tend to be consistent, thereby improving the uniformity of the wear of the grinding wheel 311, extending the service life of the grinding wheel 311, and improving the accuracy of the test.

[0038] In a further embodiment, the grinding chain 310 further includes a plurality of connecting members. A plurality of grinding wheels 311 and a plurality of connecting members are evenly distributed on the test bench 100 about a first direction, with the grinding wheels 311 and the connecting members alternately distributed about the first direction. The connecting members include connecting rods 312, the axes of the connecting rods 312 being perpendicular to the axes of the grinding wheels 311. The plurality of connecting rods 312 are each arranged to be capable of orbital rotation about the first direction. Each grinding wheel 311 is provided with a rotating rod 313, which is coaxially arranged and rotationally engaged with its corresponding grinding wheel 311. A rotating ring 314 is provided at each end of the rotating rod 313, which rotationally engages with the adjacent connecting rod 312 arranged about the first direction.

[0039] The rotating rod 313 is an elliptical rod, so that the grinding wheel 311 can only rotate relative to the rotating rod 313 and can move synchronously with the rotating rod 313 .

[0040] Furthermore, the connecting rod 312 is arranged along the first direction, and the end surfaces of the plurality of grinding wheels 311 are all arranged parallel to the connecting rod 312 .

[0041] Alternatively, the connecting rod 312 is arranged at an angle relative to the first direction, and the end faces of the plurality of grinding wheels 311 are arranged parallel to the connecting rod 312. By angling the grinding wheel 311 and the connecting rod 312, when the grinding wheel 311 rotates to grind the sample, the speed difference between the two end faces of the inclined grinding wheel 311 during grinding is relatively smaller than that of a non-inclined grinding wheel 311, thereby reducing the difference in the amount of wear on the two end faces of the grinding wheel 311.

[0042] When the multiple connecting rods 312 revolve in the first direction, they drive the connected swivels 314 to move synchronously. The swivels 314, in turn, drive the rotating rods 313 and grinding wheels 311 to move synchronously, enabling the grinding wheels 311 to revolve in the first direction, and thus the entire grinding chain 310 to rotate in the first direction. The swivels 314 also enable the grinding wheels 311 to rotate relative to the adjacent connecting rods 312, ensuring the freedom of rotation of the grinding wheels 311.

[0043] In a further embodiment, the test section 300 further includes a mounting frame 320 and a transmission member 330 . The mounting frame 320 is disposed on the test bench 100 . The transmission member 330 is mounted on the mounting frame 320 . The transmission member 330 is used to drive the multiple connecting rods 312 to revolve around the first direction.

[0044] Similar to the prior art, the mounting bracket 320 is mounted on the test bench 100 so as to be rotatable about a second direction, where the second direction is horizontal and perpendicular to the first direction.

[0045] The mounting frame 320 includes two base plates 321, which are arranged side by side in a first direction and connected by a plurality of limiting rods 322. The limiting rods 322 are all arranged along the first direction and are fixedly connected to the two base plates 321. The grinding chain 310 is located between the two base plates 321 in the first direction.

[0046] Specifically, the two base plates 321 are respectively referred to as a first plate and a second plate. The first plate is mounted on the test bench 100 so as to be rotatable about a second direction. A counterweight 323 is provided on the second plate. The first plate and the second plate are connected by a handle 324.

[0047] During use, after adjusting the counterweight, the entire mounting frame 320 is first rotated and lifted upward in the second direction by the handle 324, and then the sample is mounted on the turntable 200. The mounting frame 320 is then reset to allow the grinding wheel 311 to contact the sample.

[0048] Among them, the transmission member 330 includes two coaxial double gears 331, which are arranged side by side in the second direction and are both arranged along the first direction. The two coaxial double gears 331 are both rotatably installed between the two base plates 321, and one of the coaxial double gears 331 is driven to rotate by a driving member, which is a motor, and a plurality of rotating grooves 332 are respectively provided on the two gears of the coaxial double gear 331, and the plurality of rotating grooves 332 are evenly distributed on the outer peripheral wall surface of the corresponding gears, and the connecting rod 312 can be engaged with the rotating groove 332.

[0049] The transmission member 330 also includes two transmission chains 333. Each transmission chain 333 corresponds to the base plate 321. The transmission chains 333 are annular and arranged along a first direction on their corresponding base plate 321. The transmission chains 333 are rotatable about their respective axes. The two transmission chains 333 are arranged face-to-face in the first direction. The connecting rod 312 is connected to the two transmission chains 333 at both ends in the first direction. The transmission chains 333 rotate synchronously with the connecting rod 312.

[0050] Specifically, the transmission chain 333 includes a plurality of links, which are evenly distributed along a first direction on the corresponding base plate 321. Each link has two through-holes, which are arranged sequentially along the first direction. The connecting rod 312 passes through the two through-holes in sequence along the first direction and then slidably engages with the corresponding base plate 321.

[0051] In this embodiment, a transmission member 330 is provided. When in use, the motor is started, and the motor is used to drive the coaxial double gear 331 to rotate, and the multiple connecting rods 312 and the transmission chain 333 are caused to rotate around the first direction, and the multiple connecting rods 312 are used to cause the multiple grinding wheels 311 to revolve around the first direction.

[0052] In a further embodiment, a suction pipe 110 and an air pump are provided on the test table 100. The suction pipe 110 is connected to the air pump, and in the vertical direction, the end of the suction pipe 110 away from the air pump is located between the grinding wheel 311 and the turntable 200. The provision of the suction pipe 110 allows debris between the grinding wheel 311 and the turntable 200 to be cleaned.

[0053] In a further embodiment, the test bench 100 is further provided with an air blowing pipe 120 and an air blowing pump. One end of the air blowing pipe 120 is connected to the air blowing pump, and the other end extends along a first direction between the two substrates 321 for blowing air between the two substrates 321. The air blowing pipe 120 is provided to cool the grinding wheel 311.

[0054] In another possible embodiment, the grinding wheel 311 close to one side of the turntable 200 in the vertical direction can move up and down to change the amount of contact between the grinding wheel 311 and the sample.

[0055] Both base plates 321 are equipped with an adjustment member 340. The adjustment member 340 comprises an elastic band 341 and two adjustment groups. The elastic band 341 is made of rubber and is positioned between the two base plates 321 and fixedly connected to the corresponding base plate 321. The elastic band 341 is an annular structure, through which the multiple connecting rods 312 slide in contact with the base plates 321. The elastic band 341 is provided with an annular slideway, within which the multiple connecting rods 312 slide.

[0056] The two vertical sides of the elastic band 341 are referred to as the first side and the second side, respectively. The first side is located above the second side. The adjustment group includes an adjustment wheel 342 and a tensioning wheel 343, which are located on the upper and lower sides of the second side, respectively, and both abut against the second side. In the second direction, the two tensioning wheels 343 are located between the two adjustment wheels 342. The adjustment wheel 342 can move in the second direction, and the tensioning wheel 343 can move up and down, so that the elastic band 341 is always kept taut.

[0057] Specifically, the adjustment group also includes a bidirectional lead screw 344, which is arranged along the second direction and is mounted on the corresponding base plate 321 so as to be rotatable about its own axis. The two adjustment wheels 342 are each screw-engaged with their corresponding bidirectional lead screw 344. The bidirectional lead screw 344 is provided with two threaded segments with opposite rotation directions, and the two adjustment wheels 342 are screw-engaged with the two threaded segments, respectively. As a result, when the bidirectional lead screw 344 rotates, the two adjustment wheels 342 can be relatively close to or separated from each other in the second direction. The bidirectional lead screw 344 can be rotated manually or driven by a motor.

[0058] The tensioning wheel 343 is mounted on the corresponding base plate 321 via a first elastic member 345. The first elastic member 345 is arranged in a vertical direction and always has a tendency to urge the tensioning wheel 343 to move upward. The first elastic member 345 is a compression spring.

[0059] More specifically, a mounting rod 346 is fixedly provided on the base plate 321 , the tensioning wheel 343 is slidably engaged with the mounting rod 346 , and the first elastic member 345 is provided between the tensioning wheel 343 and the mounting rod 346 .

[0060] The adjusting wheel 342 includes a wheel body and a sliding block, which are coaxially arranged and fixedly connected. The wheel body is used to abut against the elastic band 341, and the sliding block is used to screw with the bidirectional lead screw 344 and slide with the base plate 321. The structure of the tensioning wheel 343 is the same as that of the adjusting wheel 342.

[0061] In this embodiment, by providing an adjustment member 340 and utilizing the adjustment wheel 342 and the tensioning wheel 343, before use, the number of grinding wheels 311 that can contact the sample can be increased or decreased as needed to change the grinding thickness and thus adaptively adjust the width of the detection area.

[0062] Specifically, when adjustment is needed, the bidirectional screw 344 is rotated to make the two adjusting wheels 342 approach each other or move away from each other in the second direction. When the two adjusting wheels 342 approach each other in the second direction, the tensioning wheel 343 moves downward to compress the first elastic member 345 provided thereon. Since the adjusting wheel 342 abuts against the elastic band 341, the adjusting wheel 342 will cooperate with the tensioning wheel 343 to deform part of the elastic band 341 downward, causing the connecting rod 312 located at the deformed elastic band 341 to move downward, and drive the grinding wheel 311 thereon to move downward, so that this part of the grinding wheel 311 can contact the sample, thereby increasing the amount of contact between the grinding wheel 311 and the sample. When the two adjusting wheels 342 move away from each other in the second direction, the tensioning wheel 343 moves upward, and the first elastic member 345 deforms part of the elastic band 341 upward, thereby causing the connecting rod 312 located at the deformed elastic band 341 to move upward, and driving the grinding wheel 311 thereon to move upward, so that this part of the grinding wheel 311 is separated from the sample, reducing the amount of contact between the grinding wheel 311 and the sample.

[0063] In another possible embodiment, the multiple grinding wheels 311 in the grinding chain 310 are divided into multiple grinding groups, each of which includes multiple grinding wheels 311. The number of grinding wheels 311 in each grinding group is different. Preferably, there are less than or equal to three grinding groups.

[0064] By providing multiple grinding groups, the grinding chain 310 can be rotated as needed before use to bring the corresponding grinding group into contact with the sample for grinding. This increases the range of use of the grinding chain 310 and eliminates the need for repeated removal and replacement of the grinding wheel 311. Furthermore, when the motor drives the grinding wheel 311 within a grinding group to revolve in the first direction, the motor must reciprocate within the range of the grinding group.

[0065] In combination with the above embodiment, the specific working process is as follows:

[0066] When in use, the sample to be tested is first placed on the turntable 200. After adjusting the counterweight, the entire mounting frame 320 is first rotated and lifted upward in the second direction through the handle 324, and then the sample is mounted on the turntable 200. Thereafter, the mounting frame 320 is reset so that the grinding wheel 311 can contact the sample.

[0067] The turntable 200 is then driven to rotate about its own axis. The tangential force generated by the rotation of the turntable 200 drives the grinding wheel 311 in contact with it to rotate. The rotating grinding wheel 311 contacts the sample, causing the sample to wear and test. A motor is then used to rotate the coaxial double gear 331, causing the multiple connecting rods 312 and the transmission chain 333 to rotate about a first direction. The multiple connecting rods 312 also cause the multiple grinding wheels 311 to revolve about the first direction. During the sample testing process, the entire grinding chain 310 rotates, switching the position where the grinding wheel 311 contacts the sample. This ensures uniform grinding of the sample by the grinding wheel 311 while varying the distance from various points on the grinding wheel 311 to the center of the turntable 200. Ultimately, the degree of wear on the grinding wheel 311 is made uniform, improving the wear uniformity of the grinding wheel 311, extending the service life of the grinding wheel 311, and enhancing the accuracy of the test.

[0068] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A device for testing the wear resistance of a coating, characterized in that: The test device comprises a test bench, a turntable and a test section; the axis of the turntable is arranged in a vertical direction and is mounted on the test bench so as to be rotatable around its own axis, and a sample is arranged on the turntable; the test section is mounted on the test bench and is located above the turntable; the test section comprises a grinding chain, which is mounted on the test bench so as to be rotatable around its own axis, the axis direction of the grinding chain being referred to as a first direction, and the first direction being a horizontal direction; the grinding chain comprises a plurality of grinding wheels, which are connected end to end in sequence around the first direction to form a closed annular structure, and the plurality of grinding wheels are respectively rotatable around their own axes, the axes of the grinding wheels are in the tangential direction of the grinding chain, and the axes of the plurality of grinding wheels are evenly distributed in the circumferential direction of the grinding chain; the grinding wheel close to one side of the turntable in the vertical direction can contact the sample, and the rotation of the turntable around its own axis can drive the grinding wheel in contact with the sample to rotate around its own axis; The grinding chain also includes multiple connecting parts, multiple grinding wheels and multiple connecting parts are evenly distributed on the test bench around the first direction, and the grinding wheels and connecting parts are alternately distributed in sequence around the first direction; the connecting parts include a connecting rod, the axis of the connecting rod is perpendicular to the axis of the grinding wheel, and the multiple connecting rods are all arranged to be able to revolve and rotate around the first direction; each grinding wheel is provided with a rotating rod, the rotating rod is coaxially arranged and rotatably matched with the corresponding grinding wheel, and a rotating ring is provided at both ends of the rotating rod, which is rotatably matched with the connecting rod arranged adjacent to it around the first direction.

2. The wear resistance testing device for coatings according to claim 1, characterized in that: The testing part further includes a mounting frame and a transmission member. The mounting frame is arranged on the testing table. The transmission member is installed on the mounting frame. The transmission member is used to drive the multiple connecting rods to revolve around the first direction.

3. The wear resistance testing device for coatings according to claim 2, characterized in that: The mounting bracket can be mounted on the test bench so as to be rotatable around a second direction, where the second direction is horizontal and perpendicular to the first direction.

4. The wear resistance testing device for coatings according to claim 2, characterized in that: The mounting frame includes two base plates; the transmission member includes two coaxial double gears, which are arranged side by side in the second direction and are both arranged along the first direction, and the second direction is horizontal and perpendicular to the first direction; the two coaxial double gears are both rotatably installed between the two base plates, and a plurality of rotation grooves are respectively provided on the two gears of the coaxial double gears, and the plurality of rotation grooves are evenly distributed on the outer peripheral wall surface of the corresponding gears, and the connecting rod can be engaged with the rotation grooves.

5. The wear resistance testing device for coatings according to claim 4, characterized in that: The transmission part also includes two transmission chains; the transmission chain is annular, and the transmission chain is arranged in a one-to-one correspondence with the substrate. The transmission chain is arranged along the first direction on the corresponding substrate and can rotate around its own axis, and the two transmission chains are arranged face to face in the first direction; the two ends of the connecting rod in the first direction are respectively connected to the two transmission chains, and the transmission chain can rotate synchronously with the connecting rod.

6. The device for testing the wear resistance of a coating according to claim 4, characterized in that: The grinding wheel on one side of the turntable can move up and down in the vertical direction.

7. The device for testing the wear resistance of a coating according to claim 6, characterized in that: Adjusting parts are provided on both substrates, and the adjusting parts include an elastic band and two adjusting groups. The elastic band is located between the two substrates and is fixedly connected to the corresponding substrates. The elastic band is an annular structure, and an annular slide is provided on the elastic band, and multiple connecting rods are slidably installed in the slide. The two sides of the elastic band in the vertical direction are respectively called the first side and the second side, and the first side is located above the second side; the adjusting group includes an adjusting wheel and a tensioning wheel, and the adjusting wheel and the tensioning wheel are respectively located on the upper and lower sides of the second side and are both in contact with the second side, and in the second direction, the two tensioning wheels are located between the two adjusting wheels, the adjusting wheel can move in the second direction, and the tensioning wheel can move up and down, so that the elastic band always remains tensioned.

8. The device for testing the wear resistance of a coating according to claim 1, wherein: A suction pipe and an air pump are provided on the test bench. The suction pipe is connected to the air pump, and in the vertical direction, one end of the suction pipe away from the air pump is located between the grinding wheel and the turntable.

9. The device for testing the wear resistance of a coating according to claim 1, wherein: The multiple grinding wheels in the grinding chain are divided into multiple grinding groups, each grinding group includes multiple grinding wheels, and the number of grinding wheels in each grinding group is different.

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