An Automobile Coating Wear Resistance Tester and Testing Method

Abstract

The present invention relates to the technical field of automotive paint testing, and specifically to a wear resistance tester and testing method for automotive paint, including a testing platform, a testing mechanism, and a locking unit. By increasing the number of testing stations and setting multiple different comparison groups, the present invention simulates the wear conditions of automotive paint in real situations with reference to different grinding head materials and different applied forces of the grinding head, improving the authenticity of test results. Moreover, by simultaneously testing and comparing multiple stations, the testing efficiency is improved, eliminating the cumbersome processes of repeatedly replacing grinding heads, applying different downward pressures, and conducting multiple repeated tests. Secondly, according to testing requirements, multiple stations can be set to conduct tests simultaneously, and all stations can be locked simultaneously through the locking unit, improving the testing efficiency and the convenience of the testing process.

Description

Technical Field

[0001] The present invention relates to the technical field of automotive paint testing, and specifically to a wear resistance tester and testing method for automotive paint. Background Art

[0002] The wear resistance of automotive paint is one of the important indicators for evaluating its quality and durability. Since a car will face various frictions during daily use, such as sand, stone impacts, car wash brush rubbing, etc., these will cause wear on the body surface. Therefore, ensuring that the automotive paint has good wear resistance is crucial for protecting the body from damage and maintaining the vehicle's beauty. Thus, it is necessary to test the wear resistance of automotive paint to ensure that its wear resistance meets the usage requirements.

[0003] Currently, when testing the wear resistance of automotive paint, first, the automotive paint is coated on a sample plate, and the sample plate is fixed to a test bench. Then, the wear resistance of the sample plate is tested by a grinding head in a wear resistance tester moving left and right reciprocally on the upper surface of the sample plate. For the current wear resistance testing process, there are the following problems: When conducting the wear resistance test, mainly a grinding head of a single material is used for the wear resistance test. In actual situations, the materials that may rub against the automotive paint can be various different materials. Therefore, it is necessary to replace the grinding head and the sample plate multiple times during the test process, and repeat the test process multiple times using grinding heads of different materials. The test process is cumbersome. Secondly, the current test process is mainly carried out at a single station, and the test efficiency is not good. Summary of the Invention

[0004] Based on this, it is necessary to provide a wear resistance tester and testing method for automotive paint, aiming to solve the problems of the above-mentioned existing technologies.

[0005] The present application provides a wear resistance tester for automotive paint, including: a test platform, on the upper end surface of which two mounting plates are fixedly arranged. The two mounting plates are opposite to each other left and right. On the left mounting plate, a horizontal plate one is slidably arranged left and right through a connecting shaft. On the right mounting plate, a horizontal plate two is slidably arranged left and right through a horizontal rod.

[0006] A test mechanism is jointly arranged between the horizontal plate one and the horizontal plate two. The test mechanism includes a sliding plate. On the right end surface of the horizontal plate one, a plurality of sliding plates arranged from front to back are slidably installed. On the upper end surface of the horizontal plate two, a plurality of card slots arranged equidistantly from front to back are opened. A rectangular plate is jointly arranged between the card slots and the sliding plates. On the rectangular plate, a rectangular block is slidably arranged up and down through a mounting rod with a vertical axis. A grinding head is arranged below the rectangular block. Both the sliding plate and the rectangular plate slide up and down and are penetrated by a connecting rod with a vertical axis. A lower pressing plate is arranged on the connecting rod. The lower pressing plate is L-shaped, and the two left and right opposite lower pressing plates are symmetric left and right.

[0007] A locking unit is jointly provided between the first horizontal plate and the second horizontal plate.

[0008] According to an advantageous embodiment, the testing mechanism further includes a docking post. A docking post with an axis extending from left to right is fixedly arranged on the right end face of the sliding plate. A docking groove corresponding to the docking post is formed on the left end face of the rectangular plate. The right end of the docking post is chamfered. A first spring sleeved on the connecting shaft is jointly and fixedly arranged between the first horizontal plate and the left mounting plate.

[0009] According to an advantageous embodiment, the testing mechanism further includes a connecting bar. A connecting bar is fixedly arranged on the lower end face of the connecting rod. A moving block is slidably arranged left and right on the lower end face of the connecting bar. The lower end face of the moving block is fixedly connected to the lower pressing plate through a first spring telescopic rod with a vertical axis. Guide rods with a vertical axis are fixedly arranged on the opposite rear faces of the two relatively left and right moving blocks through a transverse frame. Guide grooves corresponding to the guide rods one by one are formed on the upper end face of the testing platform.

[0010] According to an advantageous embodiment, a plurality of rectangular placing grooves are arranged at equal intervals from front to back on the testing platform.

[0011] According to an advantageous embodiment, a U-shaped frame is rotatably arranged on the right connecting rod above the connecting bar. A groove for cooperating with the left connecting rod and the connecting bar is formed on the rear end face of the left vertical section of the U-shaped frame.

[0012] According to an advantageous embodiment, the locking unit further includes a mounting bolt. A mounting bolt with a vertical axis is fixedly arranged on the inner wall of the card slot. A mounting hole is formed on the rectangular plate. Except for the right connecting rod at the rearmost side, L-shaped frames are fixedly sleeved on the remaining right connecting rods. A L-shaped backing plate is fixedly arranged on the lower end face of the vertical section of the L-shaped frame. A through hole is formed on the horizontal section of the backing plate. The horizontal section of the backing plate is located between the second horizontal plate and the adjacent rectangular plate at the rear side. A locking plate is jointly sleeved on the right connecting rod at the rearmost side and the adjacent mounting bolt, and a nut is threadedly mounted on the mounting bolt.

[0013] According to an advantageous embodiment, pads are fixedly arranged at both ends of the lower end face of the locking plate.

[0014] According to an advantageous embodiment, a lower pressing ring is fixedly sleeved on the right connecting rod above the rectangular plate.

[0015] According to a preferred embodiment, a T-shaped groove is formed in the front end face of the rectangular block, a T-shaped block is installed in the T-shaped groove, the grinding head is fixedly arranged on the lower end face of the T-shaped block, an adjusting group is arranged on the rectangular block, the adjusting group includes a side plate, the side plate is fixedly arranged on the left connecting bar, a plurality of locking holes one are arranged on the side plate at equal intervals from top to bottom, an adjusting block is sleeved on the mounting rod in a vertically sliding manner, a second spring sleeved on the mounting rod is fixedly arranged between the adjusting block and the rectangular block, a pressing sleeve sleeved on the mounting rod is fixedly arranged on the lower end face of the rectangular block, a locking hole two is formed in the left end face of the adjusting block, and a locking rod is inserted and installed between the locking hole two and the corresponding locking hole one.

[0016] In summary, the present invention includes at least one of the following beneficial effects: First, in the present invention, by adding test stations and setting multiple different comparison groups, with the different grinding head materials and different acting forces applied by the grinding heads as references, the wear conditions of automotive coatings under real conditions are simulated, improving the authenticity of test results. And by simultaneously testing and comparing at multiple stations, the test efficiency is improved, eliminating the cumbersome processes of repeatedly replacing grinding heads, applying different downward pressures, and repeatedly testing. Secondly, according to test requirements, multiple stations can be set to conduct tests simultaneously, and all stations can be locked simultaneously through the locking unit, improving the test efficiency and the convenience of the test process.

[0017] Second, the docking posts on the sliding plate are inserted into the docking grooves on the corresponding rectangular plates on the right side. Therefore, the two mounting plates, the first horizontal plate, all the sliding blocks, all the rectangular plates, and the second horizontal plate together form multiple rectangular frames, avoiding the problem of the second horizontal plate forming a cantilever during the wear resistance test. Secondly, the groove on the U-shaped frame is stuck into the adjacent connecting rod on the left side, making the left and right connecting rods, the sliding plate, and the rectangular plate an integrated structure, improving the stability during subsequent tests.

[0018] Third, in the locking unit of the present invention, all the rectangular plates can be locked only by a single nut on the rearmost locking plate, which is convenient for installing and disassembling the test stations, and enables all the grinding heads to bear the reaction forces together during the left-right reciprocating movement test, improving the stability during the test process. Secondly, it is convenient to install different numbers of rectangular plates to form the required number of test stations, and the wear resistance of the same coating sample can be tested simultaneously by grinding heads of different materials, avoiding repeated testing by replacing grinding heads, and improving the test efficiency and the applicability of the tester. Description of the Drawings

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the provided drawings.

[0020] Figure 1 Fig. Figure 1 shows a three-dimensional structural schematic diagram of a wear resistance tester for automotive coatings provided according to an embodiment of the present invention.

[0021] Figure 2 Fig. Figure 2 shows a three-dimensional structural schematic diagram among a test platform, a mounting plate, and a second horizontal plate provided according to an embodiment of the present invention.

[0022] Figure 3 Fig. Figure 3 shows a partial sectional front view of a sliding plate, a rectangular plate, and a sample plate provided according to an embodiment of the present invention.

[0023] Figure 4 Fig. Figure 4 shows a partial sectional three-dimensional structural schematic diagram among a sliding plate, a rectangular plate, and a U-shaped frame provided according to an embodiment of the present invention.

[0024] Figure 5 Fig. Figure 5 shows a three-dimensional structural schematic diagram among an adjusting block, a pressing strip, and a grinding head provided according to an embodiment of the present invention.

[0025] Figure 6 Fig. Figure 6 shows a three-dimensional structural schematic diagram among a second horizontal plate, a locking plate, and a cushion block provided according to an embodiment of the present invention.

[0026] Among them, the above-mentioned drawings include the following reference numerals: 1, test platform; 2, mounting plate; 3, first horizontal plate; 4, second horizontal plate; 5, test mechanism; 50, sliding plate; 500, card slot; 501, rectangular plate; 502, rectangular block; 503, grinding head; 504, lower pressing plate; 51, docking column; 510, docking groove; 511, first spring; 52, connecting strip; 520, moving block; 521, first spring telescopic rod; 522, guide rod; 523, guide groove; 53, placement groove; 54, U-shaped frame; 540, groove; 55, locking unit; 550, mounting bolt; 551, mounting hole; 552, L-shaped frame; 553, cushion plate; 554, locking plate; 555, nut; 56, cushion block; 57, lower pressing ring; 58, T-shaped block; 59, adjusting group; 590, side plate; 591, first locking hole; 592, adjusting block; 593, second spring; 594, pressing sleeve; 596, locking rod; 6, sample plate. Detailed implementation manners

[0027] In order to make the above objects, features, and advantages of the present invention more obvious and understandable, the following will describe the specific embodiments of the present invention in detail with reference to the accompanying drawings. Many specific details are set forth in the following description to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0028] As Figure 1 shown, an automobile paint wear resistance tester includes: a test platform 1, on the upper end face of which two mounting plates 2 are fixedly arranged. The two mounting plates 2 are opposite to each other left and right. A first horizontal plate 3 is slidably arranged left and right on the left mounting plate 2 through a connecting shaft. A second horizontal plate 4 is slidably arranged left and right on the right mounting plate 2 through a horizontal rod, and the horizontal rod is connected to an external electric reciprocating push rod.

[0029] As Figure 1 、 Figure 2 and Figure 3 shown, a test mechanism 5 is jointly arranged between the first horizontal plate 3 and the second horizontal plate 4. The test mechanism 5 includes a sliding plate 50. A plurality of sliding plates 50 arranged from front to back are slidably installed on the right end face of the first horizontal plate 3. A plurality of card slots 500 arranged at equal intervals from front to back are formed on the upper end face of the second horizontal plate 4. A rectangular plate 501 is jointly arranged between the card slots 500 and the sliding plates 50. A rectangular block 502 is slidably arranged up and down on the rectangular plate 501 through a vertically axially mounting rod. A grinding head 503 is arranged below the rectangular block 502. The sliding plates 50 and the rectangular plate 501 are both slidable up and down and are penetrated by a vertically axially connecting rod. A lower pressing plate 504 is arranged on the connecting rod. The lower pressing plate 504 is L-shaped, and the two relatively left and right lower pressing plates 504 are symmetric about the left and right.

[0030] As Figure 1 shown, a locking unit 55 is jointly arranged between the first horizontal plate 3 and the second horizontal plate 4.

[0031] During operation, first, multiple templates 6 to be tested are manually placed on the test platform 1. According to the number of templates 6 to be tested, the corresponding number of sliding plates 50 and rectangular plates 501 are selected. The sliding plates 50 are slidably installed on the first horizontal plate 3, and the rectangular plates 501 are installed on the second horizontal plate 4. The locking of the sliding plates 50 and the rectangular plates 501 is completed through the locking unit 55. At this time, the rectangular blocks 502 are located above the corresponding templates 6. Different materials of grinding heads 503 are selected according to requirements and installed on the rectangular blocks 502. Then, the external electric reciprocating push rod works to drive the second horizontal plate 4, the rectangular plates 501, and all the grinding heads 503 to reciprocate left and right to test the wear resistance of the templates 6. After the test, the templates 6 are taken out, the wear conditions of the templates 6 are observed, and their wear resistance is evaluated. Secondly, through the reciprocating movement test of different materials of grinding heads 503, the wear resistance performance results of the templates 6 under external wear of different materials are obtained by comparison.

[0032] As Figure 1 , Figure 3 and Figure 4 shown, the test mechanism 5 further includes a docking column 51. The right end face of the sliding plate 50 is fixedly provided with a docking column 51 with an axis extending from left to right. A docking groove 510 corresponding to the docking column 51 is opened on the left end face of the rectangular plate 501. The right end of the docking column 51 is chamfered. A first spring 511 sleeved on the connecting shaft is fixedly arranged between the first horizontal plate 3 and the left mounting plate 2.

[0033] As Figure 1 , Figure 2 and Figure 4 shown, the test mechanism 5 further includes a connecting strip 52. The lower end face of the connecting rod is fixedly provided with a connecting strip 52. A moving block 520 is slidably arranged on the lower end face of the connecting strip 52 from left to right. The lower end face of the moving block 520 is fixedly connected to the lower pressing plate 504 through a first spring telescopic rod 521 with a vertical axis. Guide rods 522 with vertical axes are fixedly arranged on the opposite rear faces of the two moving blocks 520 on the left and right through a transverse frame. Guide grooves 523 corresponding to the guide rods 522 one by one are opened on the upper end face of the test platform 1.

[0034] As Figure 2 shown, a plurality of rectangular placing grooves 53 arranged at equal intervals from front to back are opened on the test platform 1.

[0035] As Figure 4 shown, a U-shaped frame 54 is rotatably arranged on the right connecting rod above the connecting strip 52. A groove 540 for cooperating with the left connecting rod and the connecting strip 52 is opened on the rear end face of the left vertical section of the U-shaped frame 54.

[0036] First, manually place the template 6 in the corresponding placement groove 53. The rectangular area of the placement groove 53 preliminarily limits the template 6, facilitating the subsequent pressing and limiting of the template 6 and wear resistance testing. Then, the external electric push rod works to move the second horizontal plate 4 to the left, adjusting the position of the sliding plate 50 so that the docking post 51 on the sliding plate 50 is inserted into the docking groove 510 on the corresponding rectangular plate 501 on the right. Therefore, the two mounting plates 2, the first horizontal plate 3, all the sliding plates 50, all the rectangular plates 501, and the second horizontal plate 4 jointly form multiple rectangular frames, avoiding the formation of a cantilever on the second horizontal plate 4 during the wear resistance testing process and guiding the lower pressing plates 504 on the sliding plate 50 and the lower pressing plates 504 on the corresponding rectangular plates 501 to face each other left and right.

[0037] The second horizontal plate 4 continues to move to the left, causing the first horizontal plate 3 to move to the left and compress the first spring 511. The elastic force generated by the deformation of the first spring 511 causes the sliding plate 50 and the rectangular plate 501 to always remain in close contact during the subsequent left and right reciprocating movement testing process. Then, the first horizontal plate 3 pushes the sliding plate 50 and the rectangular plate 501 to move to the left above the corresponding placement groove 53. At this time, the two lower pressing plates 504 facing each other left and right are located above both sides of the placement groove 53. Rotate the U-shaped frame 54 so that the groove 540 on the U-shaped frame 54 is caught on the adjacent left connecting rod, and the U-shaped frame 54 is located above the adjacent left connecting strip 52. At this time, through the locking of the U-shaped frame 54, the left and right two connecting rods, the sliding plate 50, and the rectangular plate 501 form an integral structure, improving the stability during the subsequent reciprocating movement testing operation and also being able to lock the sliding plate 50 and the rectangular plate 501.

[0038] Then, the locking unit 55 works to lower the right connecting rod. The right connecting rod drives the connecting strip 52, the moving block 520, and the lower pressing plate 504 to move downward. The right connecting rod drives the left connecting strip 52 to move downward synchronously through the U-shaped frame 54. The guide rod 522 on the moving block 520 is inserted into the corresponding guide groove 523. After the lower pressing plate 504 contacts the template 6, the first spring telescopic rod 521 deforms. The elastic force generated by the deformation of the first spring telescopic rod 521 causes the lower pressing plate 504 to tightly press the template 6 on the test platform 1. A stable rectangular frame with the grinding head 503 in the middle is formed by the left and right two guide rods 522, the two connecting strips 52, and the test platform 1, improving the stability during the subsequent left and right movement testing process of the grinding head 503.

[0039] As Figure 1 、 Figure 4 、 Figure 5 and Figure 6As shown, the locking unit 55 includes a mounting bolt 550. An axis-vertical mounting bolt 550 is fixedly arranged on the inner wall of the card slot 500. Mounting holes 551 are formed in the rectangular plate 501. Except for the right rear connecting rod, L-shaped brackets 552 are fixedly sleeved on the remaining right connecting rods. A downward pressing ring 57 is fixedly sleeved on the right connecting rod above the rectangular plate 501. At the lower end of the vertical section of the L-shaped bracket 552, an L-shaped backing plate 553 is fixedly arranged. A through hole is formed in the horizontal section of the backing plate 553. The horizontal section of the backing plate 553 is located between the second horizontal plate 4 and the adjacent rear rectangular plate 501. The right rear connecting rod and the adjacent mounting bolt 550 are jointly sleeved with a locking plate 554, and a nut 555 is threadedly mounted on this mounting bolt 550.

[0040] As Figure 6 shown, at both ends of the lower end surface of the locking plate 554, pads 56 are fixedly arranged.

[0041] As Figure 6 shown, a downward pressing ring 57 is fixedly sleeved on the right connecting rod above the rectangular plate 501.

[0042] During operation, first, manually sleeved and installed the frontmost rectangular plate 501 in the frontmost card slot 500, and make the mounting bolt 550 pass through the mounting hole 551 on this rectangular plate 501. Then, sleeve the left end of the L-shaped bracket 552 on the connecting rod corresponding to the rectangular plate 501, and place the backing plate 553 on the L-shaped bracket 552 in the adjacent rear card slot 500. Then, pass the mounting bolt 550 corresponding to this card slot 500 through the mounting hole 551 on the rear rectangular plate 501 to complete the installation and placement of this rectangular plate 501. After that, repeat the above process to complete the assembly of all rectangular plates 501 and L-shaped brackets 552, so that the left end of the L-shaped bracket 552 is located above the corresponding downward pressing ring 57, and its backing plate 553 is located below the corresponding rectangular plate 501. Finally, install the locking plate 554 on the right rear connecting rod at the rearmost side and the rearmost mounting bolt 550. Through the pads 56 provided on the locking plate 554, make the locking plate 554 closely adhere to the corresponding downward pressing ring 57 and the rearmost rectangular plate 501. Then, carry out the docking process between the sliding plate 50 and the rectangular plate 501.

[0043] When the moving docking process between the sliding plate 50 and the rectangular plate 501 is completed, manually press down all L-shaped brackets 552 and locking plates 554. The downward pressing ring 57 is pressed down, so that the right connecting rod moves downward synchronously, so that the lower pressing plate 504 presses down the template 6. Finally, the downward pressing ring 57 closely adheres to the upper end surface of the rectangular plate 501. Then, manually tighten the nut 555 on the rearmost mounting bolt 550 to complete the locking process of the rectangular plate 501, the L-shaped bracket 552 and the locking plate 554.

[0044] In the above fixing process, all the rectangular plates 501 can be locked tightly by a single nut 555 on the locking plate 554 at the rearmost side, which is convenient for installation and disassembly. Moreover, when all the grinding heads 503 are reciprocating left and right during the test, the reaction force is borne jointly by all the rectangular plates 501, improving the stability during the test. Secondly, it is convenient to install different numbers of rectangular plates 501 to form test stations with the required number. It can measure the wear resistance of grinding heads 503 made of different materials against the paint sample 6 after spraying with the same kind of paint at one time, and make comparisons, avoiding repeated tests by replacing the grinding heads 503, thus improving the test efficiency and the applicability of the tester.

[0045] As Figure 3 , Figure 4 and Figure 5 shown, a T-shaped groove is formed in the front end face of the rectangular block 502. A T-shaped block 58 is installed in the T-shaped groove, and the grinding head 503 is fixedly arranged on the lower end face of the T-shaped block 58. An adjusting group 59 is arranged on the rectangular block 502. The adjusting group 59 includes a side plate 590. The side plate 590 is fixedly arranged on the left connecting bar 52. A plurality of locking holes 591 are formed in the side plate 590 at equal intervals from top to bottom. An adjusting block 592 is sleeved on the mounting rod in a vertically sliding manner. A second spring 593 sleeved on the mounting rod is fixedly arranged between the adjusting block 592 and the rectangular block 502. A pressing sleeve 594 sleeved on the mounting rod is fixedly arranged on the lower end face of the rectangular block 502. A locking hole 596 is formed in the left end face of the adjusting block 592. A locking rod 596 is inserted and installed between the locking hole 596 and the corresponding locking hole 591.

[0046] After the sliding plate 50 and the rectangular plates 501 are both locked and installed, the operator manually inserts the T-shaped blocks 58 on the grinding heads 503 made of different materials into the corresponding T-shaped grooves to complete the assembly of the grinding heads 503. Referring to Figure 5 , the first grinding head 503 and the third grinding head 503 from front to back are made of the same material, and the second grinding head 503 is made of another material. At this time, the lower end of the grinding head 503 is in close contact with the corresponding sample 6. Then, the operator presses the adjusting block 592, so that the adjusting block 592 drives the pressing sleeve 594 to move downward, and the second spring 593 is compressed. When the locking holes 596 on the two front adjusting blocks 592 are aligned with the corresponding locking holes 591, the locking rod 596 is inserted and installed on the adjusting block 592 to complete the locking of the two front adjusting blocks 592, that is, the pressures generated by the two front second springs 593 on the rectangular block 502 are the same. Then, repeat the adjustment for the third adjusting block 592 from front to back, so that the adjusting block 592 drives the pressing sleeve 594 to press against the rectangular block 502, and insert the corresponding locking rod 596 into the corresponding locking holes 591 and the locking hole 596, that is, at this time, the sample 6 corresponding to the third adjusting block 592 is subjected to the greatest acting force of the grinding head 503.

[0047] By adding test workstations, multiple different comparison groups are set up. With the differences in the material of the grinding head 503 and the applied force of the grinding head 503 as references, the wear situation of automotive coatings under real conditions is simulated, improving the authenticity of the test results. By conducting tests and comparisons simultaneously at multiple workstations, the test efficiency is improved, and the cumbersome process of repeatedly replacing the grinding head 503 and applying different downward pressures is avoided.

[0048] As Figures 1 - 6 shown, in addition, the present invention also provides a method for testing the wear resistance of automotive coatings, including the following steps: S1. Test preparation: Place the samples 6 to be tested for wear resistance in the corresponding placement grooves 53 in sequence. Then, select the same number of sliding plates 50, rectangular plates 501, and L-shaped frames 552 according to the number of samples 6 to be tested. Manually install the L-shaped frames 552 and locking plates 554 from front to back in sequence. Then, complete the docking of the two through the cooperation between the docking posts 51 on the sliding plate 50 and the docking grooves 510 on the rectangular plate 501.

[0049] S2. Locking: Manually press down all the L-shaped frames 552 and locking plates 554, so that the pressing ring 57 moves downward, the right connecting rod moves downward synchronously, and the lower pressing plate 504 presses the sample 6. Then, manually tighten the nuts 555 on the bolts 550 at the rearmost side to complete the locking process of the rectangular plate 501, the L-shaped frame 552, and the locking plate 554.

[0050] S3. Comparison grouping: Manually snap the T-shaped blocks 58 on the grinding heads 503 of different materials into the corresponding T-shaped grooves to complete the assembly of the grinding heads 503. At the same time, align the second locking holes on the adjusting blocks 592 with different first locking holes 591, and insert and install the locking rods 596 for locking, so that the grinding heads 503 apply different downward pressing forces to the samples 6.

[0051] S4. Testing: The external electric reciprocating push rod works to drive the second horizontal plate 4, the rectangular plate 501, and all the grinding heads 503 to move left and right reciprocally to test the wear resistance of the sample 6. After the test, take out the sample 6, observe the wear situation of the sample 6 to evaluate its wear resistance, and finally compare to obtain the wear resistance performance results of the sample 6 when it is externally worn by different materials under the same acting force, and the wear resistance performance results of the sample 6 when it is externally worn by the same material under different acting forces.

[0052] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom", etc. is usually based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description. Without contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the protection scope of the present invention; the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0053] In addition, the terms "first", "second", "No. 1", "No. 2" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", "No. 1", "No. 2" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0054] In the description of the present invention, it should also be noted that unless otherwise clearly specified and defined, the terms "arranged", "connected", "installed", "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] The embodiments of this specific implementation manner are all preferred embodiments of the present invention, and do not limit the protection scope of the present invention accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. An abrasion resistance tester for automotive coatings, characterized in that, Including: A test platform, on the upper end face of which there are two fixed mounting plates. The two mounting plates are opposite to each other left and right. On the left mounting plate, a first horizontal plate is slidably arranged left and right through a connecting shaft. On the right mounting plate, a second horizontal plate is slidably arranged left and right through a horizontal rod. A test mechanism is jointly arranged between the first horizontal plate and the second horizontal plate. The test mechanism includes a sliding plate. On the right end face of the first horizontal plate, a plurality of sliding plates arranged from front to back are slidably installed. On the upper end face of the second horizontal plate, a plurality of card slots arranged equidistantly from front to back are provided. A rectangular plate is jointly arranged between the card slots and the sliding plates. On the rectangular plate, a rectangular block is slidably arranged up and down through a vertically axially mounting rod. A grinding head is arranged below the rectangular block. Both the sliding plate and the rectangular plate slide up and down and are penetrated by a vertically axially connecting rod. A lower pressing plate is arranged on the connecting rod. The lower pressing plate is L-shaped, and the two relatively left and right lower pressing plates are symmetric left and right. A locking unit is jointly arranged between the first horizontal plate and the second horizontal plate. The locking unit further includes a mounting bolt. A vertically axially mounting bolt is fixedly arranged on the inner wall of the card slot. A mounting hole is provided on the rectangular plate. Except for the right connecting rod at the rearmost side, L-shaped frames are fixedly sleeved on the remaining right connecting rods. A L-shaped backing plate is fixedly arranged on the lower end face of the vertical section of the L-shaped frame. A through hole is provided on the horizontal section of the backing plate. The horizontal section of the backing plate is located between the second horizontal plate and the adjacent rectangular plate at the rear side. A locking plate is jointly sleeved on the right connecting rod at the rearmost side and the adjacent mounting bolt, and a nut is threadedly installed on the mounting bolt. The test mechanism further includes a connecting strip. A connecting strip is fixedly arranged on the lower end face of the connecting rod. A moving block is slidably arranged left and right on the lower end face of the connecting strip. The lower end face of the moving block is fixedly connected to the lower pressing plate through a vertically axially first spring telescopic rod. On the opposite faces of the two relatively left and right moving blocks, vertically axially guide rods are fixedly arranged through a transverse frame. Corresponding guide grooves are provided on the upper end face of the test platform. A lower pressing ring is fixedly sleeved on the right connecting rod above the rectangular plate, so that the left end of the L-shaped frame is located above the corresponding lower pressing ring.

2. The wear resistance tester for automotive coatings according to claim 1, characterized in that: The test mechanism further includes a docking column. A docking column extending from left to right axially is fixedly arranged on the right end face of the sliding plate. A docking groove corresponding to the docking column is provided on the left end face of the rectangular plate. The right end of the docking column is chamfered. A first spring sleeved on the connecting shaft is jointly fixedly arranged between the first horizontal plate and the left mounting plate.

3. The abrasion resistance tester for automotive coatings according to claim 1, wherein: A plurality of rectangular placing grooves arranged equidistantly from front to back are provided on the test platform.

4. The wear resistance tester for automotive coatings according to claim 1, characterized in that: A U-shaped frame is rotatably arranged on the right connecting rod above the connecting strip. A groove cooperating with the left connecting rod and the connecting strip is provided on the rear end face of the left vertical section of the U-shaped frame.

5. The wear resistance tester for automotive coatings according to claim 1, characterized in that: Blocks are fixedly arranged at both ends of the lower end face of the locking plate.

6. The abrasion resistance tester for automotive coatings according to claim 5, characterized in that: A T-shaped groove is formed in the front end face of the rectangular block. A T-shaped block is slidably installed in the T-shaped groove, and a grinding head is fixedly arranged on the lower end face of the T-shaped block. An adjusting group is arranged on the rectangular block. The adjusting group includes side plates. Side plates are fixedly arranged on the left connecting strip. A plurality of locking holes 1 are arranged on the side plates at equal intervals from top to bottom. An adjusting block is sleeved on the mounting rod in a vertically sliding manner. A second spring sleeved on the mounting rod is fixedly arranged between the adjusting block and the rectangular block. A pressing sleeve sleeved on the mounting rod is fixedly arranged on the lower end face of the rectangular block. A locking hole 2 is formed in the left end face of the adjusting block. A locking rod is inserted and installed between the locking hole 2 and the corresponding locking hole 1.

7. A testing method for the wear resistance of automotive coatings, which is completed in cooperation with a wear resistance tester for automotive coatings described in claim 6, characterized in that, It includes the following steps: S1. Test preparation: Place the sample in the corresponding placement groove. Then, select the same number of sliding plates, rectangular plates, and L-shaped frames according to the number of samples to be tested. Manually install the L-shaped frames and locking plates from front to back in sequence. Then, complete the docking between the two through the cooperation between the docking posts on the sliding plate and the docking grooves on the rectangular plate. S2. Locking: Press down all the L-shaped frames and locking plates, so that the pressing ring moves downward, so that the right connecting rod moves downward synchronously, so that the lower pressing plate presses the sample. Then, tighten the nut on the last mounting bolt to complete the locking process. S3. Comparison and grouping: Snap the T-shaped blocks on the grinding heads made of different materials into the corresponding T-shaped grooves to complete the assembly of the grinding heads, and perform locking through the insertion and installation of locking rods, so that the grinding heads apply different downward pressing forces to the samples. S4. Test: All the grinding heads move left and right reciprocally to test the wear resistance of the sample. After the test is completed, take out the sample and observe the wear condition of the sample to evaluate its wear resistance.

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