A sample preparation device for testing the bonding strength of plywood

Abstract

The invention belongs to the technical field of plywood bonding strength detection, and specifically discloses a plywood bonding strength detection sample preparation device, comprising a workbench, a controller is arranged on one side of the workbench, a driving structure is arranged on the surface of the workbench, and a sample preparation structure is arranged inside the workbench. By arranging the sample preparation structure, the thickness of the plywood core sample to be cut can be measured and the height of the cutting disk can be self-adjusted at the same time. The staff only needs to place the core sample under the pressing plate, and the work intervention is less, which reduces the error caused by the manual measurement and adjustment process and improves the subsequent detection accuracy. At the same time, because the ratio of the inner diameter of the connecting tube to the inner diameter of the mounting tube is three to two, two-thirds of the moving distance of the pressing plate is the height of the cutting disk exceeding the top surface of the workbench. This arrangement meets the requirement that the groove depth required for the detection is two-thirds of the sample thickness, and the groove can be directly opened without the need for the staff to measure, which is simple to operate and improves the sample preparation efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of plywood bonding strength detection, and in particular relates to a plywood bonding strength detection sample preparation device. Background Art

[0002] Plywood is a wood composite material made of multiple layers of wood. The bonding strength of plywood is an important indicator to measure its shear resistance. At present, in the process of plywood testing, the core sample is usually cut first and then grooved. The depth of the groove should be sawed to 2 / 3 of the thickness of the core sample. However, when grooving the existing plywood core sample, its thickness usually needs to be measured, and the height of the cutting equipment is adjusted to facilitate the grooving process. Due to the high amount of manual intervention in this method, the subsequent test results are prone to errors, which reduces the detection accuracy. Summary of the invention

[0003] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a plywood bonding strength testing and sampling device.

[0004] To achieve the above purpose, the present invention provides a sample preparation device for gluing strength detection of plywood, comprising a workbench, a controller is arranged on one side of the workbench, a driving structure is arranged on the surface of the workbench, and a sample preparation structure is arranged inside the workbench; the sample preparation structure comprises two sliding cavities opened inside the workbench, two mounting cavities are opened inside the workbench and located between the two sliding cavities, a slotting assembly is arranged inside the workbench, and a pushing assembly for adjusting the position of the slotting assembly is arranged on the top of the workbench; wherein the slotting assembly comprises a connecting shell slidably connected inside the workbench and located between the two mounting cavities, a cutting disk is arranged inside the connecting shell, and a working cavity corresponding to the connecting shell is opened on the surface of the workbench, the connecting shell is slidably connected to the inner wall of the working cavity, and connecting blocks are arranged on both sides of the connecting shell, a second motor is arranged inside one of the connecting blocks, the output shaft of the second motor is fixedly connected to a rotating shaft, the other end of the rotating shaft passes through the connecting block and the connecting shell in sequence and is fixedly connected to the inner wall of the cutting disk, and the highest point of the cutting disk is located on the same horizontal line as the top surface of the workbench.

[0005] In the above technical solution, further, the inner wall of the installation cavity is fixedly connected with a mounting tube, an adjusting rod is arranged inside the installation tube, the upper end of the adjusting rod passes through the installation tube and is fixedly connected with a connecting plate, and one end of the connecting plate is fixedly connected to the surface of the adjacent connecting block.

[0006] In the above technical solution, further, an adjustment plate is slidably connected to the inner wall of the installation tube, the top of the adjustment plate is fixedly connected to the lower end of the adjustment rod, and an adjustment cavity is formed between the bottom of the adjustment plate and the interior of the installation tube.

[0007] In the above technical solution, further, the pushing assembly includes two electric push rods respectively arranged on both sides of the workbench, a fixed plate is arranged on the top of the workbench, the output shaft of the electric push rod is fixedly connected to the surface of the fixed plate, the cross-sectional shape of the fixed plate is "L" shaped, and a pressure plate is arranged on the inner side of the fixed plate, and the bottom surface of the pressure plate is in contact with the top of the workbench.

[0008] In the above technical solution, further, a pressure sensor is arranged inside the fixed plate, a buffer block is embedded in the bottom of the fixed plate, the top surface of the buffer block contacts the pressure sensor, and the bottom surface of the buffer block contacts the top surface of the pressure plate.

[0009] In the above technical solution, further, the bottom of the pressure plate is provided with evenly distributed adsorption grooves, the top of the pressure plate is fixedly connected with evenly distributed connecting pipes connected to adjacent adsorption grooves, and the upper surface of the connecting pipes is provided with evenly distributed through holes.

[0010] In the above technical solution, further, the top of the fixed plate is fixedly connected with a fixed tube that is evenly distributed and corresponds to the connecting tube, the upper end of the connecting tube passes through the interior of the fixed tube and is fixedly connected with a sealing plate that is slidably connected to the inner wall of the fixed tube, and a spring is fixedly connected between the top of the sealing plate and the inner wall of the fixed tube.

[0011] In the above technical solution, further, the inner wall of the sliding cavity is slidably connected with a connecting cylinder, the inner wall of the connecting cylinder is slidably connected with a push plate, the top of the push plate is fixedly connected with a connecting rod, the upper end of the connecting rod passes through the connecting cylinder and is fixedly connected to the bottom of the pressure plate.

[0012] In the above technical solution, further, a storage cavity is formed between the top of the push plate and the interior of the connecting cylinder, the interior of the storage cavity is filled with hydraulic oil, a conduit connected to the storage cavity is provided on the surface of the connecting cylinder, the other end of the conduit is connected to the adjustment cavity of the adjacent mounting cylinder, and the ratio of the inner diameter of the connecting cylinder to the inner diameter of the mounting cylinder is three to two.

[0013] In the above technical solution, further, the driving structure includes two mounting seats respectively arranged on both sides of the workbench, the two electric push rods are respectively arranged on the top of the two mounting seats, a first motor is arranged on one side of the workbench, the output shaft of the first motor is fixedly connected with a screw rod, the screw rod thread passes through the mounting seat and is rotatably connected to the surface of the workbench, and a guide rod is arranged on the other side of the workbench, the guide rod passes through the other mounting seat and is fixedly connected to the surface of the workbench.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] By setting up the sample preparation structure, the thickness of the plywood core sample to be cut can be measured and the height of the cutting disc can be self-adjusted. The staff only needs to place the core sample under the pressing plate, which reduces the work intervention, reduces the error caused by manual measurement and adjustment, and improves the subsequent detection accuracy. At the same time, since the ratio of the inner diameter of the connecting tube to the inner diameter of the installation tube is three to two, two-thirds of the moving distance of the pressing plate is the height of the cutting disc exceeding the top surface of the workbench. This setting meets the groove depth required for detection, which is two-thirds of the sample thickness. The groove can be directly made without the need for staff to measure, which is easy to operate and improves the sample preparation efficiency.

[0016] Under the action of the pushing component, the position of the cutting disk can be adjusted. Through the cooperation of the pressure plate, the connecting tube, the through hole, the sealing plate, the fixing tube and the spring, the position of the core sample can be limited, thereby reducing the situation in which the core sample deviation during the grooving process affects the grooving effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of a plywood bonding strength testing and sampling device proposed by the present invention;

[0018] Figure 2 A cross-sectional schematic diagram of a plywood bonding strength testing sample preparation device proposed by the present invention;

[0019] Figure 3 A schematic diagram of the distribution of the mounting cavity and the sliding cavity of a plywood bonding strength testing sample preparation device proposed by the present invention;

[0020] Figure 4 It is a partial cross-sectional schematic diagram of a pushing assembly of a plywood bonding strength testing sample preparation device proposed by the present invention;

[0021] Figure 5 for Figure 4 A magnified view of middle;

[0022] Figure 6 This is a schematic diagram of the connection between the slotting assembly and the conduit of a plywood bonding strength testing sample preparation device proposed by the present invention;

[0023] Figure 7 The present invention provides a schematic diagram of the connection between a connecting tube, a mounting tube and a conduit of a plywood bonding strength testing sample preparation device.

[0024] In the figure: 1. workbench; 101. controller; 2. drive structure; 201. first motor; 202. lead screw; 203. mounting seat; 204. guide rod; 3. sample preparation structure; 301. mounting cavity; 302. sliding cavity; 31. slotting assembly; 311. connecting shell; 312. connecting block; 313. second motor; 314. connecting plate; 315. cutting disc; 316. mounting cylinder; 317. adjusting rod; 318. adjusting plate; 32. pushing assembly; 321. electric push rod; 322. fixing plate; 323. pressing plate; 324. adsorption groove; 325. connecting cylinder; 326. connecting rod; 327. pushing plate; 328. conduit; 329. fixing cylinder; 3210. pressure sensor; 3211. connecting pipe; 3212. through hole; 3213. sealing plate; 3214. spring. DETAILED DESCRIPTION

[0025] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] like Figure 1-Figure 7 The plywood bonding strength detection sample preparation device shown comprises a workbench 1, a controller 101 is arranged on one side of the workbench 1, a driving structure 2 is arranged on the surface of the workbench 1, and a sample preparation structure 3 is arranged inside the workbench 1;

[0027] The sample preparation structure 3 includes two sliding cavities 302 opened inside the workbench 1, two installation cavities 301 are opened inside the workbench 1 and located between the two sliding cavities 302, a slotting component 31 is arranged inside the workbench 1, and a pushing component 32 for adjusting the position of the slotting component 31 is arranged on the top of the workbench 1;

[0028] Wherein, the slotting assembly 31 includes a connecting shell 311 which is slidably connected to the inside of the workbench 1 and is located between the two mounting cavities 301, a cutting disk 315 is arranged inside the connecting shell 311, and a working cavity corresponding to the connecting shell 311 is opened on the surface of the workbench 1, the connecting shell 311 is slidably connected to the inner wall of the working cavity, connecting blocks 312 are arranged on both sides of the connecting shell 311, a second motor 313 is arranged inside one of the connecting blocks 312, the output shaft of the second motor 313 is fixedly connected to a rotating shaft, the other end of the rotating shaft passes through the connecting block 312 and the connecting shell 311 in sequence and is fixedly connected to the inner wall of the cutting disk 315, and the highest point of the cutting disk 315 is located on the same horizontal line as the top surface of the workbench 1;

[0029] By starting the second motor 313, the cutting disk 315 can be driven to rotate to achieve the effect of cutting and grooving. By adjusting the height of the two connecting blocks 312, the height of the connecting shell 311 can be changed, so that it can groove samples of different thicknesses to meet the grooving requirements during testing and improve the accuracy of subsequent testing.

[0030] like Figure 1-Figure 7 As shown, the inner wall of the installation cavity 301 is fixedly connected with a mounting cylinder 316, and an adjusting rod 317 is arranged inside the mounting cylinder 316. The upper end of the adjusting rod 317 passes through the mounting cylinder 316 and is fixedly connected with a connecting plate 314, and one end of the connecting plate 314 is fixedly connected to the surface of the adjacent connecting block 312;

[0031] An adjustment plate 318 is slidably connected to the inner wall of the installation cylinder 316, the top of the adjustment plate 318 is fixedly connected to the lower end of the adjustment rod 317, and an adjustment cavity is formed between the bottom of the adjustment plate 318 and the interior of the installation cylinder 316;

[0032] The height of the adjusting rod 317 can be adjusted by adjusting the position of the adjusting plate 318. In this process, the connecting plate 314 can be driven to move synchronously by the adjusting rod 317, and then the heights of the two connecting blocks 312 can be changed synchronously to achieve the height adjustment of the cutting disk 315 passing through the top surface of the workbench 1.

[0033] like Figure 1-Figure 7 As shown, the pushing assembly 32 includes two electric push rods 321 respectively arranged on both sides of the workbench 1, a fixed plate 322 is arranged on the top of the workbench 1, the output shaft of the electric push rod 321 is fixedly connected to the surface of the fixed plate 322, the cross-sectional shape of the fixed plate 322 is "L" shaped, and a pressure plate 323 is arranged on the inner side of the fixed plate 322, and the bottom surface of the pressure plate 323 is in contact with the top of the workbench 1.

[0034] A pressure sensor 3210 is disposed inside the fixing plate 322 , and a buffer block is embedded and installed at the bottom of the fixing plate 322 . The top surface of the buffer block contacts the pressure sensor 3210 , and the bottom surface of the buffer block contacts the top surface of the pressure plate 323 .

[0035] The bottom of the pressing plate 323 is provided with uniformly distributed adsorption grooves 324 , and the top of the pressing plate 323 is fixedly connected with uniformly distributed connecting pipes 3211 connected to adjacent adsorption grooves 324 . The upper surface of the connecting pipes 3211 is provided with uniformly distributed through holes 3212 .

[0036] The top of the fixing plate 322 is fixedly connected with fixing tubes 329 which are evenly distributed and correspond to the connecting tubes 3211. The upper end of the connecting tube 3211 penetrates into the inside of the fixing tube 329 and is fixedly connected with a sealing plate 3213 which is slidably connected with the inner wall of the fixing tube 329. A spring 3214 is fixedly connected between the top of the sealing plate 3213 and the inner wall of the fixing tube 329. In the attached figure, the spring 3214 is in a compressed state.

[0037] The electric push rod 321 is started to drive the fixed plate 322 to move upward. During this process, the sealing plate 3213 is gradually moved downward by the spring 3214, so as to achieve the effect of driving the pressing plate 323 away from the fixed plate 322 through the connecting tube 3211, until the pressing plate 323 can move upward together and the sample to be grooved can be placed between the pressing plate 323 and the top surface of the workbench 1, and the sample is placed under the pressing plate 323, and the fixed plate 322 is driven downward by the electric push rod 321. During this process, the pressing plate 323 first contacts the top surface of the sample. At this time, the pressing plate 323 can stop moving downward under the obstruction of the sample, while the electric push rod 321 and the fixed plate 322 continue to move downward close to the pressing plate 323. The connecting tube 3211 can be retracted to the inside of the fixed cylinder 329 and drive the sealing plate 3213 to move synchronously, and can compress the spring 3214 at the same time. In this process, the adsorption groove 324 is blocked by the sample, and as the connecting tube 3211 drives the sealing plate 3213 to move upward, the air pressure in the space between the bottom surface of the sealing plate 3213 and the inner wall of the fixed cylinder 329 is lower than that in the outside world. The setting of the through hole 3212 makes the space between the connecting tube 3211 and the adsorption groove 324 and the bottom surface of the sealing plate 3213 and the inner wall of the fixed cylinder 329 equal in pressure, and then the adsorption groove 324 generates suction to fix the sample, so that the fixed plate 322 can drive the sample to move synchronously when it moves horizontally.

[0038] When the fixing plate 322 contacts the top surface of the pressing plate 323, the pressure sensor 3210 can be pressed through the puncture block due to the obstruction of the pressing plate 323. After the pressure sensor 3210 detects that the pressure exceeds the preset value, it transmits a signal to the controller 101. The controller 101 transmits a signal to the electric push rod 321 to stop driving the fixing plate 322 downward, indicating that the sample is fixed successfully. The degree of automation is high, which reduces the errors caused by manual operation.

[0039] like Figure 1-Figure 7 As shown, the inner wall of the sliding cavity 302 is slidably connected with a connecting cylinder 325, the inner wall of the connecting cylinder 325 is slidably connected with a push plate 327, the top of the push plate 327 is fixedly connected with a connecting rod 326, the upper end of the connecting rod 326 passes through the connecting cylinder 325 and is fixedly connected to the bottom of the pressure plate 323.

[0040] A storage cavity is formed between the top of the push plate 327 and the interior of the connecting cylinder 325. The interior of the storage cavity is filled with hydraulic oil. A conduit 328 connected to the storage cavity is provided on the surface of the connecting cylinder 325. The other end of the conduit 328 is connected to the adjustment cavity of the adjacent mounting cylinder 316. The ratio of the inner diameter of the connecting cylinder 325 to the inner diameter of the mounting cylinder 316 is three to two.

[0041] During the movement of the pressing plate 323, the connecting rod 326 can be driven to move the push plate 327 the same distance. In this process, the hydraulic oil inside the storage chamber can be squeezed and injected into the inside of the adjusting chamber through the conduit 328, and then the hydraulic oil inside the adjusting chamber can push the adjusting plate 318 upward to achieve the effect of adjusting the height of the cutting disk 315. Since the ratio of the inner diameter of the connecting cylinder 325 to the inner diameter of the mounting cylinder 316 is three to two, two-thirds of the moving distance of the pressing plate 323 is the height of the cutting disk 315 exceeding the top surface of the workbench 1. This setting meets the requirement of the groove depth of two-thirds of the sample thickness required for the test, and the groove can be directly cut without the need for staff to measure. Compared with the existing method, this method can realize automatic adjustment of the groove depth to meet the test requirements, reduce the errors caused by manual measurement and adjustment, and improve the subsequent test accuracy.

[0042] like Figure 1-Figure 7 As shown, the driving structure 2 includes two mounting seats 203 respectively arranged on both sides of the workbench 1, two electric push rods 321 are respectively arranged on the top of the two mounting seats 203, a first motor 201 is arranged on one side of the workbench 1, the output shaft of the first motor 201 is fixedly connected with a screw rod 202, the screw rod 202 threadedly penetrates the mounting seat 203 and is rotatably connected to the surface of the workbench 1, and a guide rod 204 is arranged on the other side of the workbench 1, the guide rod 204 penetrates another mounting seat 203 and is fixedly connected to the surface of the workbench 1;

[0043] After the sample is fixed and limited by the pushing component 32, the first motor 201 is started to drive the screw rod 202 to rotate. Under the action of the guide rod 204, the pushing component 32 can cooperate to achieve smooth movement of the two mounting seats 203, thereby pushing the sample to move so that the cutting disk 315 can groove it.

[0044] Working principle: Start the electric push rod 321 to drive the fixed plate 322 to move up. During this process, the sealing plate 3213 is gradually moved down by the spring 3214, so as to achieve the effect of driving the pressing plate 323 away from the fixed plate 322 through the connecting tube 3211, until the pressing plate 323 can move up together and the sample to be grooved can be placed between the pressing plate 323 and the top surface of the workbench 1. The sample is placed under the pressing plate 323, and the fixed plate 322 is driven downward by the electric push rod 321. During this process, the pressing plate 323 first contacts the top surface of the sample, and at this time, it can Under the obstruction of the sample, the pressing plate 323 stops moving downward, and the electric push rod 321 and the fixing plate 322 continue to move downward and approach the pressing plate 323. At this time, the connecting tube 3211 can be retracted to the inside of the fixing cylinder 329 and drive the sealing plate 3213 to move synchronously, and at the same time, the spring 3214 can be compressed. In this process, the adsorption groove 324 is blocked by the sample, and as the connecting tube 3211 drives the sealing plate 3213 to move upward, the air pressure in the space between the bottom surface of the sealing plate 3213 and the inner wall of the fixing cylinder 329 is lower than that of the outside world, and the through hole 3212 is designed The space between the connecting pipe 3211 and the adsorption groove 324 and the bottom surface of the sealing plate 3213 and the inner wall of the fixed cylinder 329 is arranged to be equal in pressure, so that the adsorption groove 324 generates suction to fix the sample, so that when the fixed plate 322 moves horizontally, the sample can be driven to move synchronously, and when the pressing plate 323 moves, the connecting rod 326 can be driven to move the pushing plate 327 the same distance, and in this process, the hydraulic oil in the storage chamber can be squeezed and injected into the inside of the regulating chamber through the conduit 328, and then the hydraulic oil in the regulating chamber can push the regulating plate 31 8 moves up to achieve the effect of adjusting the height of the cutting disk 315. Since the ratio of the inner diameter of the connecting tube 325 to the inner diameter of the mounting tube 316 is three to two, two-thirds of the moving distance of the pressing plate 323 is the height of the cutting disk 315 exceeding the top surface of the workbench 1. This setting meets the requirement of the groove depth of two-thirds of the sample thickness required for the test, and the groove can be directly made without the need for staff to measure. Compared with the existing method, this method can realize automatic adjustment of the groove depth to meet the test requirements, reduce the errors caused by manual measurement and adjustment, and improve the subsequent test accuracy.

[0045] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A plywood bonding strength testing sample preparation device, comprising a workbench (1), characterized in that: A controller (101) is arranged on one side of the workbench (1), a driving structure (2) is arranged on the surface of the workbench (1), and a sample preparation structure (3) is arranged inside the workbench (1); The sample preparation structure (3) comprises two sliding cavities (302) opened inside the workbench (1); two mounting cavities (301) are opened inside the workbench (1) and are located between the two sliding cavities (302); a slotting component (31) is arranged inside the workbench (1); and a pushing component (32) for adjusting the position of the slotting component (31) is arranged on the top of the workbench (1); The slotting assembly (31) comprises a connecting shell (311) slidably connected to the inside of the workbench (1) and located between the two installation cavities (301); a cutting disk (315) is arranged inside the connecting shell (311); a working cavity corresponding to the connecting shell (311) is opened on the surface of the workbench (1); the connecting shell (311) is slidably connected to the inner wall of the working cavity; connecting blocks (312) are arranged on both sides of the connecting shell (311); a second motor (313) is arranged inside one of the connecting blocks (312); an output shaft of the second motor (313) is fixedly connected to a rotating shaft; the other end of the rotating shaft passes through the connecting block (312) and the connecting shell (311) in sequence and is fixedly connected to the inner wall of the cutting disk (315); the highest point of the cutting disk (315) is located on the same horizontal line as the top surface of the workbench (1); The inner wall of the installation cavity (301) is fixedly connected to a mounting cylinder (316), an adjusting rod (317) is arranged inside the installation cylinder (316), the upper end of the adjusting rod (317) passes through the installation cylinder (316) and is fixedly connected to a connecting plate (314), and one end of the connecting plate (314) is fixedly connected to the surface of an adjacent connecting block (312); The pushing assembly (32) comprises two electric push rods (321) respectively arranged on both sides of the workbench (1); a fixing plate (322) is arranged on the top of the workbench (1); an output shaft of the electric push rod (321) is fixedly connected to the surface of the fixing plate (322); the cross-section of the fixing plate (322) is in an "L" shape; a pressing plate (323) is arranged on the inner side of the fixing plate (322); the bottom surface of the pressing plate (323) is in contact with the top of the workbench (1); A pressure sensor (3210) is arranged inside the fixing plate (322), a buffer block is embedded and installed at the bottom of the fixing plate (322), the top surface of the buffer block is in contact with the pressure sensor (3210), and the bottom surface of the buffer block is in contact with the top surface of the pressing plate (323); The bottom of the pressing plate (323) is provided with evenly distributed adsorption grooves (324), the top of the pressing plate (323) is fixedly connected with evenly distributed connecting pipes (3211) connected to adjacent adsorption grooves (324), and the upper surface of the connecting pipes (3211) is provided with evenly distributed through holes (3212); The top of the fixing plate (322) is fixedly connected to fixing tubes (329) that are evenly distributed and correspond to the connecting tubes (3211); the upper end of the connecting tube (3211) penetrates into the interior of the fixing tube (329) and is fixedly connected to a sealing plate (3213) that is slidably connected to the inner wall of the fixing tube (329); a spring (3214) is fixedly connected between the top of the sealing plate (3213) and the inner wall of the fixing tube (329); The driving structure (2) comprises two mounting seats (203) respectively arranged on both sides of the workbench (1); the two electric push rods (321) are respectively arranged on the top of the two mounting seats (203); a first motor (201) is arranged on one side of the workbench (1); an output shaft of the first motor (201) is fixedly connected to a screw rod (202); the screw rod (202) threadedly passes through the mounting seat (203) and is rotatably connected to the surface of the workbench (1); a guide rod (204) is arranged on the other side of the workbench (1); the guide rod (204) passes through another mounting seat (203) and is fixedly connected to the surface of the workbench (1).

2. A plywood bonding strength testing sample preparation device according to claim 1, characterized in that: An adjustment plate (318) is slidably connected to the inner wall of the mounting cylinder (316), the top of the adjustment plate (318) is fixedly connected to the lower end of the adjustment rod (317), and an adjustment cavity is formed between the bottom of the adjustment plate (318) and the interior of the mounting cylinder (316).

3. A plywood bonding strength testing sample preparation device according to claim 1, characterized in that: The inner wall of the sliding cavity (302) is slidably connected to a connecting cylinder (325), the inner wall of the connecting cylinder (325) is slidably connected to a push plate (327), the top of the push plate (327) is fixedly connected to a connecting rod (326), the upper end of the connecting rod (326) passes through the connecting cylinder (325) and is fixedly connected to the bottom of the pressing plate (323).

4. A plywood bonding strength testing sample preparation device according to claim 3, characterized in that: A storage cavity is formed between the top of the push plate (327) and the interior of the connecting cylinder (325), and the interior of the storage cavity is filled with hydraulic oil. A conduit (328) connected to the storage cavity is provided on the surface of the connecting cylinder (325), and the other end of the conduit (328) is connected to the adjustment cavity of the adjacent mounting cylinder (316). The ratio of the inner diameter of the connecting cylinder (325) to the inner diameter of the mounting cylinder (316) is three to two.

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