A rotary peel rate tester and its use method

Abstract

The present invention belongs to the field of surface testing technology, and specifically relates to a rotary peeling rate tester and a method of use. The rotary peeling rate tester provided by the present invention includes a rotatable turntable and a group of specimen clamping devices distributed around the turntable; a group of fixing components that rotate with the turntable are provided on the circumference of the turntable; the fixing components can fix the friction material and make the friction surface of the friction material face the specimen clamping device; the specimen clamping device includes a pressure block that can elastically slide along the radial direction of the turntable, and the end face of the pressure block facing the turntable is recorded as the pressing end face, and the specimen can be fixed on the pressing end face; the specimen clamping device also includes a compression spring that pushes the pressure block toward the turntable; the specimen clamping device also includes a limiting portion that blocks the pressure block, and the limiting portion determines the extreme position of the pressure block sliding toward the turntable. The rotary peeling rate tester provided by the present invention has the advantages of strong versatility, high testing efficiency, and rich and adjustable testing conditions.

Description

Technical Field

[0001] The invention belongs to the technical field of surface testing, and in particular relates to a rotary peeling rate tester and a use method thereof. Background Art

[0002] A peel rate tester is a device used to measure the wear resistance of a product's surface layer (such as a coating). Typically, it consists of a test piece clamping device, a test piece moving device, and a test cloth / sandpaper fixture. Over a period of time, the test piece and the test cloth / sandpaper surface are subjected to relative friction motion, and the wear resistance of the coating is evaluated based on the degree of peeling.

[0003] During the implementation of the present invention, we found that the existing peel rate tester still has the following problems: First, the existing peel rate tester preferably tests one sample at a time, which has low testing efficiency. If multiple samples are tested at the same time, the accuracy and repeatability of the results are easily low due to the uneven force between the samples; Second, the existing peel rate tester applies pressure to the surface of the specimen by means of a weight pressing block, which also limits the testing efficiency. If the specimen surface moves too fast relative to the surface of the test cloth, the tester will shake significantly, resulting in increased testing errors; Third, the actual environment faced by the product during actual use is very complex and diverse, but the existing tester can only characterize the wear resistance of the product in a conventional environment with a single friction material, which deviates greatly from the actual situation. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the present invention provides a rotary peeling rate tester and a method for using the same.

[0005] The rotary peeling rate tester provided by the present invention includes a rotatable turntable and a group of specimen clamping devices distributed around the turntable; a group of fixing components that rotate with the turntable are provided on the circumferential side of the turntable; the fixing components can fix the friction material and make the friction surface of the friction material face the specimen clamping device; the specimen clamping device includes a pressure block that can elastically slide along the radial direction of the turntable, and the end face of the pressure block facing the turntable is recorded as the pressing end face, and the pressure end face can be fixed on the pressing end face; the specimen clamping device also includes a compression spring that pushes the pressure block toward the turntable; the specimen clamping device also includes a limiting part that blocks the pressure block, and the limiting part determines the extreme position of the pressure block sliding toward the turntable.

[0006] The specimen clamping device is used to hold the specimen to be tested, while the fixed assembly is used to secure the friction material. As the turntable rotates, the friction material slides across the specimen surface, creating a friction event. As the friction material slides across the specimen surface, the pressure block is squeezed and forced to retreat a short distance. During this retreat, the compressive force between the friction material and the specimen surface is equal to the elastic force of the compression spring. Since the deformation of the compression spring is negligible relative to its overall length, the compressive force between the friction material and the specimen surface remains essentially constant. Depending on the test requirements, the friction material can be secured to only one fixed assembly, the same friction material can be secured to multiple fixed assemblies, or different friction materials can be secured to multiple fixed assemblies.

[0007] Furthermore, the fixing assembly includes a protrusion protruding toward the specimen clamping device and pressure rollers located on either side of the protrusion. The pressure rollers have an elliptical cross-section and are also fixed with handles. Commonly used friction materials are sheet materials, such as sandpaper or test cloth. The sheet friction material is stretched across the protrusion and compressed on both sides by the pressure rollers. Specifically, the pressure rollers rotate by turning the handles. Due to the elliptical cross-section of the pressure rollers, the distance between their surface and the sidewalls of the protrusion changes as they rotate, compressing and loosening the friction material.

[0008] Furthermore, the end surface of the bump is preferably an outwardly convex cylindrical surface.

[0009] Furthermore, the specimen clamping device also includes an adjustment block, a fixed sleeve, a screw, and an adjustment motor. Both the pressure block and the adjustment block are slidably disposed within the fixed sleeve, with a compression spring interposed between the pressure block and the adjustment block. The adjustment motor is fixedly disposed, and its output shaft is connected to the screw, which in turn is cooperatively connected to the adjustment block. The adjustment motor drives the screw to rotate, causing the adjustment block to slide, thereby changing the distance between the adjustment block and the pressure block, adjusting the elastic force of the compression spring, and thereby changing the extrusion force between the friction material and the test piece. Therefore, controlling the adjustment motor can achieve friction testing under different extrusion force conditions.

[0010] Furthermore, a pressure sensor is placed between the compression spring and the adjustment block. This provides real-time information on the extrusion force between the friction material and the test piece. This not only allows for real-time monitoring of pressure compliance, but also allows for automated control of the adjustment motor, allowing for changes in the extrusion force between the friction material and the test piece to be adjusted as needed.

[0011] Furthermore, the limiting portion is a pair of protruding strips located on the inner wall of the fixing sleeve.

[0012] Furthermore, the entire pressing end face is curved and concave, with a vertically extending figure-eight slot provided on it. Horizontal pressure strips are removably secured to the upper and lower edges of the pressing end face. Guide ramps are provided on the left and right sides of the pressing end face. The slots and pressure strips are used to secure the test piece. Specifically, the two sides of the test piece are inserted into the slots and then compressed with the pressure strips. The guide ramps guide the friction material from the edge of the pressing end face to the center of the pressing end face, where it contacts the test piece. During this process, the pressure block is squeezed back a certain distance, ensuring that the extrusion force during friction testing is equal to the spring force of the compression spring.

[0013] Furthermore, it also includes a reduction box and a drive motor; the output shaft of the drive motor is connected to the input end of the reduction box, and the output end of the reduction box is connected to the turntable.

[0014] Furthermore, the system also includes a set of enclosures, which are installed around the perimeter and upper and lower sides of the turntable to enclose the turntable in a closed space. Air ducts are also provided on the enclosures. Air at a specific temperature and humidity is injected into the ducts, allowing testing under different temperature and humidity environments.

[0015] As described above, the rotary peel rate tester provided by the present invention can perform various forms of tests according to test requirements. The following exemplifies one method of use, but does not mean that it is limited to this method.

[0016] S1: Fix a piece to be tested on the pressing end face of each pressing block;

[0017] S2: Fixing friction materials on the fixed components; if the wear resistance of the test piece under a single friction environment needs to be evaluated, the same friction material is fixed on each fixed component; if the wear resistance of the test piece under a complex friction environment needs to be evaluated, different friction materials are fixed on each fixed component;

[0018] S3: Based on the temperature and humidity environment required to be simulated for the wear resistance test, continuously inject gas of corresponding temperature and humidity into the airway;

[0019] S4: Start the turntable until the required number of friction tests are completed.

[0020] Beneficial effects:

[0021] The rotary peeling rate tester provided by the present invention can test one test piece or multiple test pieces at the same time, and has strong versatility.

[0022] The rotary peel rate tester provided by the present invention has a maximum number of frictions generated per turn of the turntable equal to the number of specimen clamping devices multiplied by the number of fixed components. For example, if there are four specimen clamping devices and four fixed components, a maximum of 16 frictions can be generated per turn, thus having extremely high testing efficiency.

[0023] The rotary peel rate tester provided by the present invention can use a single friction material for testing, and can also use multiple friction materials for testing at the same time, thereby being closer to the actual use environment of the test piece and better characterizing the wear resistance of the test piece in actual use.

[0024] The rotary peel rate tester provided by the present invention can adjust the extrusion force of the test according to the test requirements, and can perform real-time adjustment during the test process to form more diverse test conditions.

[0025] The rotary peeling rate tester provided by the present invention can control the temperature and humidity of the test environment to simulate a more complex use environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the present invention.

[0027] Figure 2 This is a schematic diagram of the coordination of the turntable, reduction gearbox, and drive motor.

[0028] Figure 3 for Figure 2 A partial enlarged view of .

[0029] Figure 4 Schematic diagram of the structure of the clamping device.

[0030] Figure 5 for Figure 4 A partial enlarged view of .

[0031] Figure 6 Schematic diagram of the internal structure of the clamping device.

[0032] In the figure, there are a turntable 1, a clamping device 2, a fixing assembly 11, a pressure block 21, an adjusting block 22, a fixing sleeve 23, a compression spring 25, a screw rod 26, an adjusting motor 27, a pressure sensor 28, a limiting portion 29, a protrusion 111, a pressure wheel 112, a handle portion 113, a slot 221, a pressure strip 222, a guide ramp 223, a reduction gear box 3, a drive motor 4, a panel 5, and an air duct 51. DETAILED DESCRIPTION

[0033] The present invention is further illustrated by the following examples, which are intended to more clearly illustrate the technical solutions of the present invention and should not be construed as limiting the present invention.

[0034] Unless otherwise defined, technical or scientific terms used in this disclosure should be understood to have the ordinary meanings understood by persons of ordinary skill in the art. The terms "first," "second," and similar expressions used in this disclosure do not denote any order, quantity, or importance, but are simply used to distinguish different components. Terms such as "include" or "comprising" mean that the elements or objects preceding the term include the elements or objects listed after the term, and their equivalents, without excluding other elements or objects. Terms such as "connected" or "connected" are not limited to physical or mechanical connections but may include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0035] Example 1

[0036] A rotary peel rate tester, such as Figures 1 to 6 As shown, it includes a rotatable turntable 1 and a group of specimen clamping devices 2 distributed around the turntable 1; a group of fixing components 11 that rotate with the turntable 1 are provided on the circumference of the turntable 1; the fixing components 11 can fix the friction material and make the friction surface of the friction material face the specimen clamping device 2; the specimen clamping device 2 includes a pressure block 21 that can elastically slide along the radial direction of the turntable 1, and the end face of the pressure block 21 facing the turntable 1 is recorded as the pressing end face, and the pressing end face can fix the specimen; the specimen clamping device 2 also includes a compression spring 25 that pushes the pressure block 21 toward the turntable 1; the specimen clamping device 2 also includes a limiting portion 29 that blocks the pressure block 21, and the limiting portion 29 determines the extreme position of the pressure block 21 sliding toward the turntable 1.

[0037] In this embodiment, the fixing assembly 11 includes a protrusion 111 protruding toward the specimen clamping device 2 and pressure wheels 112 located on both sides of the protrusion 111; the pressure wheel 112 has an elliptical cross-section and a handle portion 113 is fixed to the pressure wheel 112.

[0038] In this embodiment, the end surface of the protrusion 111 is an outwardly convex cylindrical surface.

[0039] In this embodiment, the specimen clamping device 2 also includes an adjusting block 22, a fixed sleeve 23, a screw 26, and an adjusting motor 27; the pressure block 21 and the adjusting block 22 can be slidably arranged in the fixed sleeve 23, and the compression spring 25 is pressed between the pressure block 21 and the adjusting block 22; the adjusting motor 27 is fixedly arranged, and the output shaft of the adjusting motor 27 is connected to the screw 26, and the screw 26 is cooperatively connected to the adjusting block 22.

[0040] In this embodiment, a pressure sensor 28 is further provided between the compression spring 25 and the adjustment block 22 .

[0041] In this embodiment, the limiting portion 29 is a pair of protruding strips located on the inner wall of the fixing sleeve 23 .

[0042] In this embodiment, the pressing end surface is overall arc-shaped and concave, and a vertically extending eight-shaped slot 221 is provided on the pressing end surface. The upper and lower sides of the pressing end surface are respectively detachably fixed with horizontal pressure strips 222; guide slopes 223 are provided on the left and right sides of the pressing end surface.

[0043] In this embodiment, a reduction gearbox 3 and a driving motor 4 are further included; the output shaft of the driving motor 4 is connected to the input end of the reduction gearbox 3 , and the output end of the reduction gearbox 3 is connected to the turntable 1 .

[0044] In this embodiment, a group of enclosures 5 are further included; the enclosures 5 are arranged on the circumference and upper and lower sides of the turntable 1 to enclose the turntable 1 in a closed space; and an air duct 51 is also provided on the enclosures 5.

[0045] The above embodiments are exemplary and intended to illustrate the technical concepts and features of the present invention so that those skilled in the art can understand the present invention and implement it accordingly. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications made in accordance with the spirit of the present invention are intended to be included within the scope of protection of the present invention.

Claims

1. A rotary peeling rate tester, characterized in that: The invention comprises a rotatable turntable (1) and a group of specimen clamping devices (2) distributed around the turntable (1); a group of fixing components (11) rotating with the turntable (1) are provided on the circumference of the turntable (1); the fixing components (11) can fix the friction material and make the friction surface of the friction material face the specimen clamping device (2); the specimen clamping device (2) comprises a pressure block (21) that can elastically slide along the radial direction of the turntable (1), the end surface of the pressure block (21) facing the turntable (1) is recorded as the pressing end surface, and the specimen can be fixed on the pressing end surface; the specimen clamping device (2) also comprises a compression spring (25) for pushing the pressure block (21) toward the turntable (1); the specimen clamping device (2) also comprises a limiting portion (29) for blocking the pressure block (21), and the limiting portion (29) determines the limit position of the pressure block (21) sliding toward the turntable (1); The fixing assembly (11) comprises a protrusion (111) protruding toward the specimen clamping device (2) and pressure wheels (112) located on both sides of the protrusion (111); The specimen holding device (2) further comprises an adjusting block (22), a fixing sleeve (23), a screw (26), and an adjusting motor (27); the pressing block (21) and the adjusting block (22) are both slidably arranged in the fixing sleeve (23), and the compression spring (25) is compressed between the pressing block (21) and the adjusting block (22); the adjusting motor (27) is fixedly arranged, and the output shaft of the adjusting motor (27) is connected to the screw (26), and the screw (26) is cooperatively connected to the adjusting block (22); a pressure sensor (28) is further provided between the compression spring (25) and the adjusting block (22); The pressing end surface is an overall arc-shaped concave surface, and a vertically extending eight-shaped slot (211) is provided on the pressing end surface. The upper and lower sides of the pressing end surface are respectively detachably fixed with horizontal pressure strips (222); and guide slopes (223) are provided on the left and right sides of the pressing end surface. It also includes a set of enclosures (5); the enclosures (5) are arranged on the circumference and upper and lower sides of the turntable (1), enclosing the turntable (1) in a closed space; and an air duct (51) is also provided on the enclosures (5).

2. The rotary peel rate tester according to claim 1, characterized in that: The cross section of the pressing wheel (112) is elliptical, and a handle portion (113) is fixed to the pressing wheel (112).

3. The rotary peel rate tester according to claim 2, characterized in that: The end surface of the protrusion (111) is an outwardly convex cylindrical surface.

4. The rotary peel rate tester according to claim 1, characterized in that: The limiting portion (29) is a pair of convex strips located on the inner wall of the fixing sleeve (23).

5. The rotary peel rate tester according to claim 1, characterized in that: It also includes a reduction box (3) and a drive motor (4); the output shaft of the drive motor (4) is connected to the input end of the reduction box (3), and the output end of the reduction box (3) is connected to the turntable (1).

6. The method for using the rotary peel rate tester according to claim 1, characterized in that: The following steps are involved: S1: Fixing a piece to be tested on the pressing end face of each pressing block (21); S2: fixing friction materials on the fixing components (11); if the wear resistance of the test piece in a single friction environment needs to be evaluated, the same friction material is fixed on each fixing component (11); if the wear resistance of the test piece in a complex friction environment needs to be evaluated, different friction materials are fixed on each fixing component (11); S3: According to the temperature and humidity environment required to be simulated for the wear resistance test, continuously injecting gas of corresponding temperature and humidity into the airway (51); S4: Start the turntable (1) until the required number of friction tests are completed.

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