Device for testing bonding strength of composite board

Abstract

The invention relates to the technical field of composite board bonding strength testing, in particular to a composite board bonding strength testing device which comprises a testing unit and a measuring unit.A second measuring frame is used for measuring the separation length between a surface layer and a core layer of a composite board through light rays, and first data is recorded; a first measuring frame is fed rightwards to directly measure the separation length between the surface layer and the core layer of the composite board, second data are recorded, when the difference between the first data and the second data is large, measurement continues to be repeated, and when the difference between the first data and the second data is within the allowable range of the difference, the difference can be ignored, and the mean value of the first data and the second data is taken as a measuring result; when the longitudinal separation heights of the composite boards are the same, the bonding strength of the composite boards is judged according to the size of transverse measurement data, if the data are large, the bonding strength is low, otherwise, the bonding strength is high, and through two modes of direct measurement and light measurement, the accuracy of a detection result is improved, and coincidence and singleness of the detection result are avoided.

Description

Technical Field

[0001] The invention relates to the technical field of composite plate bonding strength testing, in particular to a composite plate bonding strength testing device. Background Art

[0002] Composite panels refer to panels made of two or more materials. Here we mainly focus on wood composite panels. In building materials and furniture manufacturing, the bonding strength of composite panels is a key factor in measuring their quality and service life. Insufficient bonding strength may cause cracking and falling of the panels during use, seriously affecting the safety and aesthetics of the product. Therefore, it is very important to conduct panel bonding strength tests.

[0003] The traditional method is to cut a composite board of a certain size, place it on a testing machine to fix one side of it, and then apply glue to the upper and lower ends of the other side, bond the force block to the coated glue, and after the glue is cured, apply an upward force to the upper force block to separate the surface layer of the composite board from its core layer, and then directly measure the vertical distance moved by the force block to obtain the test result. However, when different composite boards need to be tested, although the longitudinal separation degree can be obtained by directly measuring the vertical distance moved by the force block, the difference in the separation length between the surface layer and the core layer of different composite boards is difficult to see with the naked eye. If a ruler is used directly for measurement, only the lateral separation degree between the front and rear ends of the composite board visible to the naked eye can be measured, and the measurement result is inaccurate. Moreover, using the longitudinal separation degree as the only criterion for judging the measurement result is too simple and cannot be used as experimental data for comparison. Summary of the invention

[0004] In view of the above problems, the embodiment of the present application provides a composite board bonding strength test device to solve the technical problems in the related art that it is difficult to compare the bonding strength of two or more boards and the test results are single. In order to achieve the above purpose, the embodiment of the present application provides the following technical solutions.

[0005] A composite board bonding strength testing device according to an embodiment of the present application includes a testing unit and a measuring unit. The measuring unit is arranged on the testing unit and is used to measure the horizontal length of the separation between the surface layer and the core layer of the composite board after testing. The testing unit includes a workbench, a test piece is arranged on the left side of the workbench, a first L-shaped contact plate is fixedly installed at the upper end of the workbench, a first threaded rod is rotatably connected to the middle of the right side of the first contact plate, the first threaded rod is connected to a second L-shaped contact plate in a threaded connection manner, and first guide rods penetrating through the second contact plate are symmetrically fixedly installed at the front and rear of the upper end of the first contact plate. The measuring unit includes a driving frame, a driving frame is arranged on the left side of the test piece, a first linkage frame is arranged on the driving frame, a first measuring frame is arranged on the first linkage frame, an adjusting member is arranged on the first linkage frame, a second linkage frame is jointly arranged among the adjusting member, the front side of the test piece and the right side of the first contact plate, and a second measuring frame is arranged on the second linkage frame. By cooperating the driving frame with the first linkage frame, the first measuring frame is controlled to feed rightward to directly measure the horizontal length of the separation between the surface layer and the core layer of the composite board after testing. The second measuring frame indirectly measures the horizontal length of the separation between the surface layer and the core layer of the composite board after testing by using light.

[0006] According to an embodiment of the present invention, the test piece includes a second threaded rod, the second threaded rod is connected to the middle of the workbench in a threaded connection manner, a moving block is rotatably connected to the left end of the second threaded rod, guide rods two symmetrically fixedly installed at the front and rear of the right end of the moving block penetrate through the workbench, an I-shaped block one is fixedly installed at the upper end of the moving block, a U-shaped fixing bracket is fixedly installed at the rear end of the moving block, and a distance control cylinder is fixedly installed at the lower end of the horizontal end on the upper side of the fixing bracket. An I-shaped block two is fixedly installed at the telescopic end of the distance control cylinder.

[0007] According to an embodiment of the present invention, the driving frame includes a connecting plate, the connecting plate is fixedly installed at the left end of the moving block, a right-angled plate is fixedly installed at the upper end of the connecting plate, a square plate is fixedly installed at the left end of the connecting plate, the square plate is located on the left side of the right-angled plate, a disc-shaped cam is rotatably connected to the front end of the square plate, an incomplete gear is rotatably connected inside the square plate, a control handle is fixedly installed at the rear end of the incomplete gear, a circular ring plate is rotatably connected to the middle of the square plate, and tooth grooves matching with the incomplete gear are uniformly arranged along the circumferential direction of the inner wall of the circular ring plate. The front end of the circular ring plate is fixedly connected to the disc-shaped cam.

[0008] According to an embodiment of the present invention, the first linkage frame includes an annular groove, the annular groove is opened in the middle of the disc-shaped cam, a sliding block is connected to the annular groove in a sliding fit manner, a moving rod sliding through the right-angled plate is fixedly installed at the right end of the sliding block, and a limiting plate is fixedly installed at the right end of the moving rod.

[0009] According to an embodiment of the present invention, the measuring frame includes a ruler, a ruler is fixedly installed on the front end of the limit plate, a rectangular groove is opened at the right end of the limit plate, a movable plate is connected to the rectangular groove in a manner of sliding up and down, an insertion needle is evenly fixedly installed on the right end of the movable plate, and the right end of the insertion needle is set to a round head.

[0010] According to an embodiment of the present invention, the adjusting member includes a threaded rod three, which is rotatably connected to the top center of the limiting plate. The threaded rod three is connected to the movable plate by a threaded connection. The movable plate is symmetrically fixed with an active block front and back, and the active block is connected to the limiting plate by sliding up and down.

[0011] According to an embodiment of the present invention, the linkage frame 2 includes a support plate 1, a support plate 1 that can be extended up and down is fixedly installed at the front end of the I-shaped block 1, a driven block is fixedly installed at the upper end of the support plate 1, a retractable rod 1 is fixedly connected between the driven block and the active block on the front side, a retractable support plate 2 is fixedly installed at the right end of the contact plate 1, a driven plate is fixedly installed at the upper end of the support plate 2, and a retractable rod 2 is fixedly connected between the left end of the rear side of the driven plate and the active block on the rear side.

[0012] According to an embodiment of the present invention, the second measuring frame includes a winding column, the front end of the driven plate is rotatably connected to the winding column, a spiral spring is fixedly connected inside the driven plate, the end of the spiral spring is fixedly connected to the winding column, a light strip is wrapped and fixed on the winding column, the light strip emits red light, the end of the light strip is fixedly connected to the right end of the driven block, a glass plate is fixedly installed at the rear end of the contact plate 2, and a scale 2 is fixedly installed at the upper end of the glass plate.

[0013] According to an embodiment of the present invention, the support plate 1 includes a positioning plate, a positioning plate is fixedly installed at the front end of the I-beam block 1, the upper end of the positioning plate is connected to the sliding plate in a sliding manner, a cylindrical spring is fixedly connected between the sliding plate and the positioning plate, the upper end of the sliding plate is fixedly connected to the driven block, the structure of the support plate 2 is the same as that of the support plate 1, the retractable rod 1 includes a fixed rod, the driven block and the active block on the front side are both fixedly connected to the fixed rod, the outer ends of the fixed rods are commonly connected to the connecting rod in a sliding manner, a connecting spring is fixedly connected between the connecting rod and the fixed rod, and the structure of the retractable rod 2 is the same as that of the retractable rod 1.

[0014] According to an embodiment of the present invention, a concave-shaped block is evenly and fixedly installed along the linear direction of the front end of the light strip, the concave-shaped block is made of a flexible material, and adjacent concave-shaped blocks are hinged.

[0015] It can be seen from the above technical solutions that the present invention has the following advantages:

[0016] 1. In the present invention, the transverse length of the separation between the surface layer of the composite board and the core layer of the composite board is measured by using light through the measuring frame 2. After recording data 1, the indoor lights are turned on and the curtains are opened. The transverse length of the separation between the surface layer of the composite board and the core layer of the composite board is directly measured by feeding the measuring frame 1 to the right, and data 2 is recorded. The difference between data 1 and data 2 is compared. When the difference is large, the measurement is repeated. When the difference between data 1 and data 2 is within the allowable range, it can be ignored. The average of the two is taken as the measurement result. When the longitudinal separation height of the composite board is the same, the bonding strength of the composite board can be judged by the size of the transverse measurement data. The larger the data, the lower the bonding strength, and vice versa. The accuracy of the test results is improved by measuring directly and measuring by light, and the coincidence and singleness of the test results are avoided.

[0017] 2. In the present invention, the combination of incomplete gears cooperates with the disc cam, so that the disc cam rotates intermittently with the annular plate. When the insertion needle is blocked, the disk cam is blocked and drives the annular plate to stop rotating. At this time, the tooth grooves on the annular plate cannot mesh with the incomplete gears, so it is no longer driven by the control handle to rotate, thereby preventing the insertion needle from being inserted between the unseparated surface layer and the core layer of the composite plate due to the driving force of the control handle, causing the detection data to become larger and affecting the test results. At the same time, multiple insertion needles are used to avoid the coincidence of a single insertion needle being inserted into the bonding gap of the composite plate, so as to achieve the purpose of ensuring the accuracy of the test results.

[0018] 3. In the present invention, the spiral spring is used to ensure that the light strip is always in a tensioned state, and the upper and lower sides of the light strip are limited by the concave-shaped blocks to prevent the light on the light strip from diverging to the upper and lower sides, affecting the subsequent data reading of the glass plate, thereby affecting the detection results.

[0019] In addition to the technical problems solved by the embodiments of the present application described above, the technical features that constitute the technical scheme, and the beneficial effects brought about by the technical features of these technical schemes, other technical problems that can be solved by a composite board bonding strength testing device provided by the embodiments of the present application, other technical features included in the technical scheme, and the beneficial effects brought about by these technical features will be further described in detail in the specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0021] Figure 1 A schematic diagram of a main-view stereoscopic structure provided according to an embodiment of the present invention is shown.

[0022] Figure 2 A schematic diagram of a rear-view stereoscopic structure provided according to an embodiment of the present invention is shown.

[0023] Figure 3 A rear perspective structural schematic diagram of the incomplete gear and the circular ring plate of the present invention is shown.

[0024] Figure 4 A schematic diagram of the main stereoscopic structure of the linkage frame 1 and the measuring frame 1 of the present invention is shown.

[0025] Figure 5 A schematic diagram of a main viewing plane structure provided according to an embodiment of the present invention is shown.

[0026] Figure 6 The left side cross-sectional plan view of the light strip and the concave-shaped block of the present invention is shown.

[0027] Figure 7 The schematic diagram of the top view and cross-sectional plan structure of the light strip and the concave-shaped block of the present invention is shown.

[0028] Figure 8 A schematic diagram of the top and cross-sectional plan structure of the winding column with a spiral spring of the present invention is shown.

[0029] Fig. 9 A schematic diagram of the main three-dimensional structure of the contact plate 1 and the contact plate 2 of the present invention is shown.

[0030] The above drawings include the following reference numerals:

[0031] 1. Test unit; 11. Workbench; 12. Test piece; 121. Threaded rod 2; 122. Moving block; 123. Guide rod 2; 124. I-shaped block 1; 125. Fixed bracket; 126. Distance control cylinder; 127. I-shaped block 2; 13. Contact plate 1; 14. Threaded rod 1; 15. Contact plate 2; 16. Guide rod 1; 2. Measuring unit; 21. Drive frame; 211. Connecting plate; 212. Right-angle plate; 213. Square plate; 214. Disc cam; 215. Control handle; 216. Incomplete gear; 217. Circular plate; 218. Tooth groove; 22. Linkage frame 1; 221. Annular groove; 222. Sliding block; 223. Moving rod; 224. Limit plate; 23 , measuring frame one; 231, scale one; 232, rectangular groove; 233, moving plate; 234, inserting needle; 24, adjusting piece; 241, threaded rod three; 242, active block; 25, linkage frame two; 251, support plate one; 2511, positioning plate; 2512, sliding plate; 2513, cylindrical spring; 252, driven block; 253, telescopic rod one; 2531, fixed rod; 2532, connecting rod; 2533, connecting spring; 254, support plate two; 255, driven plate; 256, telescopic rod two; 26, measuring frame two; 261, winding column; 262, scroll spring; 263, light strip; 2631, concave block; 264, glass plate; 265, scale two. DETAILED DESCRIPTION

[0032] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth 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 violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0033] See also Figure 1 and Fig. 9A composite board bonding strength testing device comprises a testing unit 1 and a measuring unit 2, wherein the measuring unit 2 is arranged on the testing unit 1 and is used to measure the transverse length of the separation between the surface layer and the core layer of the composite board after the test; the testing unit 1 comprises a workbench 11, a testing piece 12 is arranged on the left side of the workbench 11, an inverted L-shaped contact plate 13 is fixedly installed on the upper end of the workbench 11, a threaded rod 14 is rotatably connected to the middle part of the right side of the contact plate 13, the threaded rod 14 is connected to the inverted L-shaped contact plate 2 15 in a threaded connection manner, and a guide rod 16 that penetrates the contact plate 2 15 is fixedly installed on the upper end of the contact plate 13 symmetrically front and back; the measuring unit 2 comprises a driving frame 21, a driving frame 21 is arranged on the left side of the test piece 12, a linkage frame 22 is arranged on the driving frame 21, a measuring frame 23 is arranged on the linkage frame 22, an adjusting member 24 is arranged on the linkage frame 22, a linkage frame 25 is arranged on the adjusting member 24, the front side of the test piece 12 and the right side of the contact plate 13, a measuring frame 26 is arranged on the linkage frame 25, the driving frame 21 cooperates with the linkage frame 22 to control the measuring frame 23 to feed rightward to directly measure the transverse length of the separation between the surface layer and the core layer of the tested composite plate, and the transverse length of the separation between the surface layer and the core layer of the tested composite plate is indirectly measured by using light through the measuring frame 26.

[0034] First, place the cut composite sheet to be tested on contact plate 13, then rotate threaded rod 14 to drive contact plate 2 15 to move downward, contact plate 13 and contact plate 2 15 clamp and fix the right side of the composite sheet, bond the upper and lower surfaces of the left side of the composite sheet through test piece 12, and then apply force upward until the left side of the surface layer of the composite sheet is separated from the left side of the core layer of the composite sheet, continue to apply force until the test requirements, then stop applying force, at this time, adjust the center position of measuring frame 1 23 through adjusting piece 24 to align it with the gap between the surface layer and the core layer of the composite sheet, thereby driving measuring frame 2 26 to move to a state where it fits the front edge of the gap between the surface layer and the core layer of the composite sheet, draw the curtains and turn off the indoor lights to keep the laboratory safe. In a dark environment, the length of separation between the surface layer of the composite board and the core layer of the composite board is measured by measuring frame 26 using light. After recording data 1, the curtains and indoor lights are opened, and the driving frame 21 cooperates with the linkage frame 1 22 to control the measuring frame 1 23 to feed right to directly measure the length of separation between the surface layer of the composite board and the core layer of the composite board. Record data 2 and compare the difference between data 1 and data 2. When the difference is large, the measurement is repeated. When the difference between data 1 and data 2 is within the allowable error range, it can be ignored. The average of the two is taken as the measurement result. The bonding strength of the composite board is judged according to the size of the measured data when the same force is applied. The larger the data, the lower the bonding strength, and vice versa.

[0035] See also Figure 2 The test piece 12 includes a second threaded rod 121. The middle part of the workbench 11 is connected to the second threaded rod 121 in a threaded connection manner. The left end of the second threaded rod 121 is rotatably connected to a moving block 122. The right end of the moving block 122 is symmetrically and fixedly installed with two guide rods 123 that penetrate through the workbench 11 in the front and rear directions. The upper end of the moving block 122 is fixedly installed with a first I-shaped block 124. The rear end of the moving block 122 is fixedly installed with a U-shaped fixing bracket 125. The lower end of the horizontal end on the upper side of the fixing bracket 125 is fixedly installed with a distance control cylinder 126. The telescopic end of the distance control cylinder 126 is fixedly installed with a second I-shaped block 127. By applying glue to the upper surface of the first I-shaped block 124 and the lower surface of the second I-shaped block 127, then bonding the first I-shaped block 124 to the bottom layer of the composite board and bonding the second I-shaped block 127 to the surface layer of the composite board, the distance control cylinder 126 drives the second I-shaped block 127 to move upward, thereby applying force to the surface layer of the composite board, separating the left part of the surface layer of the composite board from the core layer of the composite board. According to the length of the composite board to be detected, the distance between the moving block 122 and the workbench 11 is adjusted by rotating the second threaded rod 121, and the moving block 122 is limited by the guide rods 123.

[0036] Refer to Figure 2 And Figure 3 The driving frame 21 includes a connecting plate 211. The left end of the moving block 122 is fixedly installed with the connecting plate 211. The upper end of the connecting plate 211 is fixedly installed with a right-angle plate 212. The left end of the connecting plate 211 is fixedly installed with a square plate 213. The square plate 213 is located on the left side of the right-angle plate 212. The front end of the square plate 213 is rotatably connected to a disk-shaped cam 214. An incomplete gear 216 is rotatably connected inside the square plate 213. The rear end of the incomplete gear 216 is fixedly installed with a control handle 215. A circular ring plate 217 is rotatably connected to the middle part of the square plate 213. Tooth grooves 218 that cooperate with the incomplete gear 216 are evenly formed in the inner ring wall of the circular ring plate 217 along its circumference. The front end of the circular ring plate 217 is fixedly connected to the disk-shaped cam 214. By driving the incomplete gear 216 to rotate through the control handle 215, the circular ring plate 217 and the disk-shaped cam 214 are driven to rotate, and the rotation of the disk-shaped cam 214 drives the first linkage frame 22 to move on a horizontal plane.

[0037] Refer to Figure 4 The first linkage frame 22 includes an annular groove 221. An annular groove 221 is formed in the middle of the disk-shaped cam 214. A sliding block 222 is connected to the annular groove 221 in a sliding fit manner. The right end of the sliding block 222 is fixedly installed with a moving rod 223 that slides through the right-angle plate 212. The right end of the moving rod 223 is fixedly installed with a limiting plate 224. By driving the sliding block 222 to move left and right on a horizontal plane through the disk-shaped cam 214, the moving rod 223 is guided by the right-angle plate 212, and the moving rod 223 and the limiting plate 224 are driven to move left and right on a horizontal plane by the sliding block 222.

[0038] See also Figure 4 The measuring frame 23 includes a scale 231, a scale 231 is fixedly installed at the front end of the limiting plate 224, a rectangular groove 232 is opened at the right end of the limiting plate 224, a moving plate 233 is connected in a sliding manner up and down, and an insertion needle 234 is evenly fixedly installed at the right end of the moving plate 233, and the right end of the insertion needle 234 is set as a round head; when the disc cam 214 drives the sliding block 222 and the moving rod 223 to move to the right, the limiting plate 224 moves to the right accordingly, and the insertion needle 234 on the limiting plate 224 enters between the surface layer and the core layer separated by the composite plate. The disk cam 214 rotates intermittently with the annular plate 217. When the insertion needle 234 is blocked, the operator who controls the control handle 215 feels the resistance and stops turning the control handle 215. At this time, the disk cam 214 stops rotating and the annular plate 217 stops rotating. At this time, the tooth groove 218 on the annular plate 217 cannot engage with the incomplete gear 216, and therefore is no longer driven by the control handle 215 to rotate, thereby preventing the insertion needle 234 from being inserted between the unseparated surface layer and the core layer of the composite sheet due to the driving force of the control handle 215, resulting in larger detection data.

[0039] See also Figure 3 and Figure 4 The adjusting member 24 includes a threaded rod 3 241, and the threaded rod 3 241 is rotatably connected to the top center of the limiting plate 224. The threaded rod 3 241 is connected to the movable plate 233 by a threaded connection. The movable plate 233 is symmetrically fixed with an active block 242, and the active block 242 is connected to the limiting plate 224 by a sliding fit up and down fit. The movable plate 233 is driven to move by the threaded rod 3 241 to adjust the vertical position of the insertion needle 234, and the measuring frame 26 is driven to move on the vertical plane by cooperating with the linkage frame 25 through the active block 242.

[0040] See also Figure 3 , Figure 4 and Figure 8The linkage frame 25 includes a support plate 1 251, a support plate 1 251 that can be retracted up and down is fixedly installed at the front end of the I-shaped block 124, a driven block 252 is fixedly installed on the upper end of the support plate 1 251, and a retractable rod 1 253 is fixedly connected between the driven block 252 and the active block 242 on the front side, a retractable support plate 254 is fixedly installed on the right end of the contact plate 13, a driven plate 255 is fixedly installed on the upper end of the support plate 254, and a retractable rod 256 is fixedly connected between the left end of the rear side of the driven plate 255 and the active block 242 on the rear side; the retractable rod 1 253 and the retractable rod 2 256 are driven to move together through the moving plate 233, thereby driving the driven block 252 and the driven plate 255 to move accordingly, and the driven block 252 and the driven plate 255 are supported by the support plate 1 251 and the support plate 254.

[0041] See also Figure 3 , Figure 4 and Figure 8 The measuring frame 26 includes a winding column 261, the front end of the driven plate 255 is rotatably connected to the winding column 261, the driven plate 255 is fixedly connected with a volute spring 262, the end of the volute spring 262 is fixedly connected to the winding column 261, a light strip 263 is wound and fixed on the winding column 261, the light strip 263 emits red light, the end of the light strip 263 is fixedly connected to the right end of the driven block 252, a glass plate 264 is fixedly installed at the rear end of the contact plate 215, and a scale 265 is fixedly installed on the upper end of the glass plate 264; the volute spring 262 ensures that the light strip 263 is always in a tensioned state, after turning off the indoor lights and drawing the curtains, the red light emitted by the light strip 263 passes through the surface layer and the core layer separated by the composite plate and shines on the glass plate 264, the red light in the glass plate 264 is observed from above, and the length from left to right between the surface layer and the core layer separated by the composite plate is read according to the scale 265.

[0042] See also Figure 5The support plate 1 251 includes a positioning plate 2511, the front end of the I-shaped block 124 is fixedly installed with the positioning plate 2511, the upper end of the positioning plate 2511 is connected to the sliding plate 2512 in a sliding manner, and a cylindrical spring 2513 is fixedly connected between the sliding plate 2512 and the positioning plate 2511. The upper end of the sliding plate 2512 is fixedly connected to the driven block 252. The structure of the support plate 254 is the same as that of the support plate 1 251. The retractable rod 1 253 includes a fixed rod 2531, and the driven block 252 is connected to the front side. The active blocks 242 are all fixedly connected with fixed rods 2531, and the outer ends of the fixed rods 2531 are connected with connecting rods 2532 in a sliding manner. A connecting spring 2533 is fixedly connected between the connecting rod 2532 and the fixed rod 2531. The structure of the telescopic rod 256 is the same as that of the telescopic rod 1 253. The force between the sliding plate 2512 and the positioning plate 2511 is balanced by the cylindrical spring 2513, and the force between the connecting rod 2532 and the fixed rod 2531 is balanced by the connecting spring 2533.

[0043] See also Figure 6 , Figure 7 and Figure 8 The front end of the light strip 263 is evenly and linearly fixedly installed with a concave block 2631, which is made of flexible material and is hinged between adjacent concave blocks 2631. The concave blocks 2631 are used to limit the upper and lower sides of the light strip 263 to prevent the light on the light strip 263 from diverging to the upper and lower sides and affecting the subsequent data reading of the glass plate 264.

[0044] Working principle of the present invention: Step 1: First, the cut composite plate to be tested is placed between the contact plate 1 13 and the contact plate 2 15 for clamping and fixing.

[0045] Step 2: Bond the left side of the composite board through the test piece 12, and then apply force upward until the left side of the surface layer of the composite board is separated from the left side of the core layer of the composite board. After continuing to apply force to the test requirements, stop applying force and directly measure the vertical displacement of the I-block 2 127 through a measuring ruler to obtain the longitudinal separation height of the composite board.

[0046] Step 3: Turn off the laboratory lights and draw the curtains to keep the laboratory in a dark environment. At this time, use the measuring frame 26 to measure the length of separation between the surface layer of the composite board and the core layer of the composite board using light. After recording data one, draw the curtains and indoor lights, and directly measure the length of separation between the surface layer of the composite board and the core layer of the composite board by feeding the measuring frame 23 to the right, record data two, and compare the difference between data one and data two. When the difference is large, continue to repeat the measurement. When the difference between data one and data two is within the allowable error range, it can be ignored. Take the average of the two as the measurement result. When the tested composite board is applied with the same force, the longitudinal separation height is inversely proportional to the bonding strength. When the longitudinal separation heights of the composite boards are the same, judge according to the transverse separation length data. The size of the data determines the bonding strength of the composite board. The larger the data, the lower the bonding strength, and vice versa.

[0047] In the description of the present invention, it is necessary to understand that the terms "center", "middle", "up", "down", "front", "back", "left", "right", "top", "bottom", "inside", "outside", "end", "axial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0048] In addition, the terms "first", "second", "number one", "number two", "one", "two" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. In the description of the present invention, "multiple" means at least two, such as two, three, etc., unless otherwise clearly and specifically limited.

[0049] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connect", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, a sliding connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, all equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A composite sheet bonding strength testing device, characterized in that: It includes a test unit (1) and a measurement unit (2). The measurement unit (2) is arranged on the test unit (1) and is used to measure the transverse length of the separation between the surface layer and the core layer of the composite board after testing. The test unit (1) includes a workbench (11). A test piece (12) is arranged on the left side of the workbench (11). An inverted L-shaped contact plate one (13) is fixedly installed at the upper end of the workbench (11). A threaded rod one (14) is rotatably connected to the middle of the right side of the contact plate one (13). The threaded rod one (14) is threadedly connected to an inverted L-shaped contact plate two (15). Guide rods one (16) penetrating through the contact plate two (15) are symmetrically and fixedly installed at the front and rear of the upper end of the contact plate one (13). The measurement unit (2) includes a driving frame (21). A driving frame (21) is arranged on the left side of the test piece (12). A linkage frame one (22) is arranged on the driving frame (21). A measurement frame one (23) is arranged on the linkage frame one (22). An adjusting part (24) is arranged on the linkage frame one (22). A linkage frame two (25) is jointly arranged among the adjusting part (24), the front side of the test piece (12), and the right side of the contact plate one (13). A measurement frame two (26) is arranged on the linkage frame two (25). By the cooperation of the driving frame (21) and the linkage frame one (22), the measurement frame one (23) is controlled to feed to the right to directly measure the transverse length of the separation between the surface layer and the core layer of the composite board after testing. The transverse length of the separation between the surface layer and the core layer of the composite board after testing is indirectly measured by the measurement frame two (26) using light.

2. A composite board bonding strength testing device according to claim 1, characterized in that: The test piece (12) includes a threaded rod two (121). The threaded rod two (121) is threadedly connected to the middle of the workbench (11). A moving block (122) is rotatably connected to the left end of the threaded rod two (121). Guide rods two (123) penetrating through the workbench (11) are symmetrically and fixedly installed at the front and rear of the right end of the moving block (122). An I-shaped block one (124) is fixedly installed at the upper end of the moving block (122). A U-shaped fixing bracket (125) is fixedly installed at the rear end of the moving block (122). A distance control cylinder (126) is fixedly installed at the lower end of the horizontal end on the upper side of the fixing bracket (125). An I-shaped block two (127) is fixedly installed at the telescopic end of the distance control cylinder (126).

3. A composite sheet bonding strength testing device according to claim 2, characterized in that: The driving frame (21) comprises a connecting plate (211), the connecting plate (211) is fixedly mounted on the left end of the moving block (122), a right-angle plate (212) is fixedly mounted on the upper end of the connecting plate (211), a square plate (213) is fixedly mounted on the left end of the connecting plate (211), the square plate (213) is located on the left side of the right-angle plate (212), a disc-shaped cam (214) is rotatably connected to the front end of the square plate (213), an incomplete gear (216) is rotatably connected inside the square plate (213), a control handle (215) is fixedly mounted on the rear end of the incomplete gear (216), a circular plate (217) is rotatably connected to the middle part of the square plate (213), tooth grooves (218) matching the incomplete gear (216) are uniformly formed on the inner ring wall of the circular plate (217) along its circumference, and the front end of the circular plate (217) is fixedly connected to the disc-shaped cam (214).

4. A composite sheet bonding strength testing device according to claim 3, characterized in that: The linkage frame (22) comprises an annular groove (221), the middle part of the disc cam (214) is provided with an annular groove (221), a sliding block (222) is connected in a sliding manner in the annular groove (221), a moving rod (223) slidingly penetrating the right angle plate (212) is fixedly mounted on the right end of the sliding block (222), and a limiting plate (224) is fixedly mounted on the right end of the moving rod (223).

5. A composite board bonding strength testing device according to claim 4, characterized in that: The measuring frame (23) comprises a scale (231), the scale (231) is fixedly mounted on the front end of the limiting plate (224), a rectangular groove (232) is provided at the right end of the limiting plate (224), a movable plate (233) is connected in the rectangular groove (232) in a manner of sliding up and down, an insertion needle (234) is evenly fixedly mounted on the right end of the movable plate (233), and the right end of the insertion needle (234) is arranged to be a round head.

6. A composite board bonding strength testing device according to claim 5, characterized in that: The adjusting member (24) comprises a threaded rod three (241), the threaded rod three (241) is rotatably connected to the center of the top of the limiting plate (224), the threaded rod three (241) and the movable plate (233) are connected in a threaded manner, the movable plate (233) is symmetrically fixed with an active block (242) in the front and rear, and the active block (242) and the limiting plate (224) are connected in an up-and-down sliding manner.

7. A composite board bonding strength testing device according to claim 2, characterized in that: The linkage frame 2 (25) comprises a support plate 1 (251), a support plate 1 (251) which can be extended upward and downward is fixedly mounted on the front end of the I-shaped block 1 (124), a driven block (252) is fixedly mounted on the upper end of the support plate 1 (251), a retractable rod 1 (253) is fixedly connected between the driven block (252) and the active block (242) on the front side, a retractable support plate 2 (254) is fixedly mounted on the right end of the contact plate 1 (13), a driven plate (255) is fixedly mounted on the upper end of the support plate 2 (254), and a retractable rod 2 (256) is fixedly connected between the left end of the rear side of the driven plate (255) and the active block (242) on the rear side.

8. A composite board bonding strength testing device according to claim 7, characterized in that: The second measuring frame (26) comprises a winding column (261), the front end of the driven plate (255) is rotatably connected to the winding column (261), a spiral spring (262) is fixedly connected inside the driven plate (255), the end of the spiral spring (262) is fixedly connected to the winding column (261), a light strip (263) is wound and fixed on the winding column (261), the light strip (263) emits red light, the end of the light strip (263) is fixedly connected to the right end of the driven block (252), a glass plate (264) is fixedly installed at the rear end of the second contact plate (15), and a scale ruler (265) is fixedly installed on the upper end of the glass plate (264).

9. A composite board bonding strength testing device according to claim 7, characterized in that: The support plate 1 (251) comprises a positioning plate (2511), the front end of the I-shaped block 1 (124) is fixedly mounted with the positioning plate (2511), the upper end of the positioning plate (2511) is connected to a sliding plate (2512) in a sliding matching manner, a cylindrical spring (2513) is fixedly connected between the sliding plate (2512) and the positioning plate (2511), the upper end of the sliding plate (2512) is fixedly connected to the driven block (252), and the structure of the support plate 2 (254) is similar to that of the support plate 1 (251). The structure is the same, the telescopic rod 1 (253) includes a fixed rod (2531), the driven block (252) and the active block (242) on the front side are both fixedly connected with the fixed rod (2531), the outer ends of the fixed rods (2531) are connected with a connecting rod (2532) in a sliding manner, and a connecting spring (2533) is fixedly connected between the connecting rod (2532) and the fixed rod (2531), and the structure of the telescopic rod 2 (256) is the same as that of the telescopic rod 1 (253).

10. A composite board bonding strength testing device according to claim 8, characterized in that: The front end of the light strip (263) is evenly and fixedly mounted with concave-shaped blocks (2631) along its linear direction. The concave-shaped blocks (2631) are made of a flexible material, and adjacent concave-shaped blocks (2631) are hinged.

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