A wood board crack detection device

Abstract

The application discloses a kind of wood board crack detection devices, belong to wood board detection technical field, including machine body, the upside of machine body is equipped with detection component, detection component includes the closed box of fixed connection on the upside of machine body, the front and back of closed box inside are fixedly connected with electric guide rail, the inside sliding connection of electric guide rail has slider, the opposite face of front and back slider is fixedly connected with optical detector, the left and right sides of optical detector are fixedly connected with striker, the closed box of being set lets wood board always be in closed environment under detection, reduce the intensity change caused by natural light and artificial light source and lead to uneven illumination of detection area, since wood board always is in closed box inside detection, and closed box inner wall uses diffuse reflection coating, light is uniformly scattered, direct reflection is reduced, contrast of crack and background is enhanced, to further guarantee the detection accuracy of wood board.

Description

Technical Field

[0001] This invention relates to the field of wood panel testing technology, and more specifically, to a wood panel crack detection device. Background Technology

[0002] Wood-based panels are sheet-like materials made from processed wood, widely used in construction, furniture, and interior decoration. Solid wood panels are the most natural and environmentally friendly, but they are more expensive and susceptible to changes in humidity. Engineered wood panels, on the other hand, have better physical and processing properties and are relatively cheaper, making them widely used in furniture manufacturing and interior decoration. Plywood, with its excellent bending strength and load-bearing capacity, is widely used in building structures and furniture manufacturing. Veneer panels are mainly used for surface decoration, adding more aesthetic options to wood-based panels. Different types of wood-based panels have different characteristics and uses; choosing the appropriate panel based on specific needs is crucial.

[0003] Wood-based panels mainly include solid wood panels, engineered wood panels, plywood, and veneer panels. Solid wood panels are made from natural wood and are characterized by their durability and natural, beautiful grain. Common solid wood panels include pine and oak boards, which are widely used in furniture, construction, flooring, and other fields. Engineered wood panels are made from waste materials or other plant fibers processed during wood processing. Common examples include MDF, particleboard, and fiberboard. Plywood is made by bonding multiple layers of thin wood panels together with adhesives. It has good bending strength and load-bearing capacity and is often used as a component of building structures and furniture. Veneer panels are panels with a thin veneer or wood grain paper coating on the surface and are widely used in furniture, doors, windows, and wall decoration. In existing technologies, when crack detection is performed on wood-based panels, the intensity variations between natural and artificial light sources in the workshop or laboratory can lead to uneven lighting in the detection area. Furthermore, some wood-based panels may have a glossy or textured surface, causing light reflection and glare that can obscure crack details, making them more difficult to detect. Summary of the Invention

[0004] In view of the problems existing in the prior art, the purpose of this invention is to provide a crack detection device for wood-based panels.

[0005] To solve the above problems, the present invention adopts the following technical solution, which can realize the detection of wood panels always inside a closed box, and the inner wall of the closed box is coated with a diffuse reflection coating to evenly scatter light and reduce direct reflection.

[0006] A wood-based panel crack detection device includes a body with a detection component on its upper side. The detection component includes a closed box fixedly connected to the upper side of the body. Electric guide rails are fixedly connected to the front and rear sides of the closed box. A slider is slidably connected inside the electric guide rails. An optical detector is fixedly connected to the opposite surfaces of the sliders on the front and rear sides. A striker is fixedly connected to the left and right sides of the optical detector. Pressure sensors are fixedly connected to the left and right sides of the closed box. Warning lights are fixedly connected to the left and right sides of the front end of the closed box. A top cover is hinged to the upper side of the closed box. A display panel is fixedly connected to the front side of the closed box. A controller is fixedly connected to the right front end of the closed box.

[0007] Furthermore, after the striker moves, it presses against the outer surface of the pressure sensor, and the striker and the pressure sensor are on the same horizontal line. The inner surface of the enclosed box and the lower side of the top cover are both provided with a diffuse reflection coating.

[0008] Furthermore, the inner and outer sides of the enclosed box are provided with a material turning assembly, which includes a bracket that is slidably connected between the machine body and the enclosed box.

[0009] Furthermore, a servo motor is fixedly connected to the left side of the bracket, and the output end of the servo motor passes through the left side of the bracket. A flip frame is fixedly connected to the output end of the servo motor, and the bracket surrounds the outside of the flip frame. Grooves are provided on both the left and right sides inside the flip frame. Moving frames are slidably connected to the upper and lower sides inside the grooves. A first pressure spring is fixedly connected between the upper and lower moving frames. The moving frames and the extrusion plate are both L-shaped. A column is fixedly connected to the side of the horizontal part of the upper and lower moving frames that is far apart. The upper and lower columns pass through the upper and lower sides inside the grooves respectively. Extrusion plates are slidably connected to the opposite surfaces of the vertical parts of the left and right moving frames.

[0010] Furthermore, the flipping frame is U-shaped, and the vertical part of the moving frame has an open movable groove. The vertical part of the extrusion plate is slidably connected inside the movable groove. Multiple second pressure springs are fixedly connected between the inner sidewall of the movable groove and the vertical part of the extrusion plate. A magnetic block is fixedly connected to the side of the vertical part of the extrusion plate near the second pressure springs. An electromagnet is fixedly connected to the side of the movable groove away from the extrusion plate. The electromagnet and the magnetic block are magnetically attracted to each other.

[0011] Furthermore, the machine body is provided with a bending assembly inside, the bending assembly including a cylinder fixedly connected to the lower side inside the machine body.

[0012] Furthermore, a push block is fixedly connected to the telescopic end of the cylinder, and fixed cylinders are fixedly connected to both the left and right sides of the push block. A limit rod is slidably connected through the upper inner side of the fixed cylinder. A sealing ring is sleeved on the outer surface of the portion of the limit rod inside the fixed cylinder. A laser rangefinder is fixedly connected to the lower inner side of the fixed cylinder, and a third pressure spring is fixedly connected between the bottom end of the limit rod and the lower inner side of the fixed cylinder.

[0013] Furthermore, the upper side of the push block is arc-shaped, and a pressing plate is fixedly connected to the top of the limiting rod. The pressing plate is positioned higher than the uppermost end face of the push block.

[0014] Furthermore, the inner and outer sides of the machine body are provided with a cleaning assembly, which includes a support platform fixedly connected to the front side of the machine body.

[0015] Furthermore, the support platform is U-shaped, and two sliding grooves are opened on the upper side of the support platform and the machine body. Sliding strips are slidably connected inside the sliding grooves. The upper side of the sliding strips is fixedly connected to the lower side of the support. Multiple rollers are rotatably connected to the lower side of the sliding strips. The outer surface of the rollers makes rolling contact with the lower inner side of the sliding grooves. Fixing plates are fixedly connected to the front side of the enclosed box and the front side of the machine body. Cleaning cotton is fixedly connected to the opposite surfaces of the fixing plates on the upper and lower sides. The cleaning cotton is distributed on the upper and lower sides of the support.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) The present invention uses a closed box to keep the wood board in a closed environment for testing, which reduces the uneven lighting in the testing area caused by the intensity changes of natural light and artificial light sources. Since the wood board is always inside the closed box for testing, and the inner wall of the closed box is coated with a diffuse reflection coating, the light is evenly scattered, reducing direct reflection and enhancing the contrast between cracks and background, thereby ensuring the testing accuracy of the wood board.

[0017] (2) The present invention flips the wood board by setting the flipping frame under the drive of the servo motor. During the process of the optical detector detecting the wood board, the pressing plate used to lock the wood board will automatically retract into the active groove when the optical detector approaches the left and right edges. At the same time, the wood board being detected can be flipped quickly, so that the detection efficiency of the optical detector on the wood board is guaranteed.

[0018] (3) The present invention uses a pusher block to press the bottom of the wood board under the push of the cylinder, so that the wood board will be slightly curved. Since the wood board will be lifted upward by the pusher block during the detection process, and the two sides of the wood board will be locked by the pressing plate, the wood board will be slightly curved, which makes it easier for the optical detector to detect the fine cracks on the surface of the wood board. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a cross-sectional structural diagram of the present invention; Figure 3 This is a cross-sectional view of the enclosed box of the present invention; Figure 4 This is a cross-sectional view of the pushing block of the present invention; Figure 5 For the present invention Figure 4 Enlarged view of point A; Figure 6 This is a schematic diagram of the structure of the flipping frame of the present invention; Figure 7 This is a cross-sectional view of the flipping frame of the present invention; Figure 8 This is a cross-sectional view of the movable frame of the present invention.

[0020] Explanation of the labels in the diagram: 1. Machine body; 2. Detection components; 21. Enclosed box; 22. Electric guide rail; 23. Slider; 24. Optical detector; 25. Strike pin; 26. Pressure sensor; 27. Warning light; 28. Top cover; 29. ​​Display panel; 3. Controller; 4. Flipping assembly; 41. Bracket; 42. Servo motor; 43. Flipping frame; 44. Groove; 45. Moving frame; 46. First pressure spring; 47. Movable groove; 48. Extrusion plate; 49. Second pressure spring; 5. Magnetic block; 6. Electromagnet; 7. Column; 8. Bending assembly; 81. Cylinder; 82. Push block; 83. Fixed cylinder; 84. Limit rod; 85. Laser rangefinder; 86. Third pressure spring; 87. Sealing ring; 88. Extrusion plate; 9. Cleaning assembly; 91. Support platform; 92. Slide groove; 93. Slide bar; 94. Roller; 95. Fixed plate; 96. Cleaning cotton. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0022] Please see Figures 1 to 8 A wood board crack detection device includes a body 1, a detection component 2 on the upper side of the body 1, the detection component 2 including a closed box 21 fixedly connected to the upper side of the body 1, electric guide rails 22 fixedly connected to the front and rear sides of the closed box 21, sliders 23 slidably connected inside the electric guide rails 22, an optical detector 24 fixedly connected to the opposite surfaces of the front and rear sliders 23, impact pins 25 fixedly connected to the left and right sides of the optical detector 24, pressure sensors 26 fixedly connected to the left and right sides of the closed box 21, warning lights 27 fixedly connected to the left and right sides of the front end of the closed box 21, a top cover 28 hinged to the upper side of the closed box 21, a display panel 29 fixedly connected to the front side of the closed box 21, and a controller 3 fixedly connected to the right side of the front end of the closed box 21.

[0023] After the striker 25 moves, it presses against the outer surface of the pressure sensor 26. The striker 25 and the pressure sensor 26 are on the same horizontal line. The inner surface of the sealed box 21 and the lower side of the top cover 28 are both provided with a diffuse reflection coating.

[0024] The inner and outer sides of the enclosed box 21 are equipped with a material turning component 4.

[0025] By adopting the above technical solution, during operation, the wood board is placed inside the enclosed box 21 via the flipping assembly 4, and then the top cover 28 is closed. Since the inner surface of the enclosed box 21 and the lower side of the top cover 28 are both coated with a diffuse reflection coating, light reflection is effectively reduced, providing a good environment for optical inspection. Subsequently, the controller 3 controls the electric guide rail 22 to start, and the slider 23 inside the electric guide rail 22 begins to slide, driving the optical inspection instrument 24 between the front and rear sliders 23 to move horizontally. The optical inspection instrument 24 scans and inspects the surface of the wood board. When a crack is detected, the optical inspection instrument 24 transmits a signal to the controller 3. Simultaneously, the strikers 25 fixedly connected to the left and right sides of the optical inspection instrument 24 move together with the optical inspection instrument 24. When the strikers... When the pressure sensor 26 and the optical detector 24 come into contact with each other and reach a preset value, the pressure sensor 26 senses the pressure change and transmits the signal to the controller 3. After receiving the signals from the optical detector 24 and the pressure sensor 26, the controller 3 controls the warning lights 27 fixedly connected to the left and right sides of the front of the enclosed box 21 to light up, reminding the operator that there is a crack in the wood board. The controller 3 also displays the crack-related information on the display panel 29 fixedly connected to the front of the enclosed box 21, so that the operator can easily check the specific situation of the crack. Since the wood board is always inside the enclosed box 21 for testing, and the inner wall of the enclosed box 21 is coated with a diffuse reflection coating, the light is evenly scattered, reducing direct reflection and enhancing the contrast between the crack and the background, thereby ensuring the detection accuracy of the wood board.

[0026] like Figures 1 to 3 and Figures 6 to 8 As shown, the material turning assembly 4 includes a bracket 41 that is slidably connected between the machine body 1 and the enclosed box 21.

[0027] A servo motor 42 is fixedly connected to the left side of the bracket 41. The output end of the servo motor 42 passes through the left side of the bracket 41. A flip frame 43 is fixedly connected to the output end of the servo motor 42. The bracket 41 surrounds the outside of the flip frame 43. Grooves 44 are provided on both the left and right sides inside the flip frame 43. Movable frames 45 are slidably connected to the upper and lower sides inside the grooves 44. A first pressure spring 46 is fixedly connected between the upper and lower movable frames 45. The movable frames 45 and the extrusion plate 48 are both L-shaped. A column 7 is fixedly connected to the side of the horizontal part of the upper and lower movable frames 45 that is far apart. The upper and lower columns 7 pass through the upper and lower sides inside the grooves 44 respectively. Extrusion plates 48 are slidably connected to the opposite surfaces of the vertical parts of the left and right movable frames 45.

[0028] The flipping frame 43 is U-shaped. The vertical part of the movable frame 45 has an open movable groove 47. The vertical part of the extrusion plate 48 is slidably connected inside the movable groove 47. Multiple second pressure springs 49 are fixedly connected between the inner side wall of the movable groove 47 and the vertical part of the extrusion plate 48. A magnet 5 is fixedly connected to the side of the vertical part of the extrusion plate 48 near the second pressure springs 49. An electromagnet 6 is fixedly connected to the side of the movable groove 47 away from the extrusion plate 48. The electromagnet 6 and the magnet 5 are magnetically attracted to each other.

[0029] By adopting the above technical solution, when it is necessary to flip the wooden board, the servo motor 42 fixed on the left side of the bracket 41 is activated. Before flipping, the wooden board is placed in the flipping frame 43. When the board is placed in, it presses against the upper and lower movable frames 45, causing the first pressure spring 46 to compress. The pressing plate 48, under the action of the second pressure spring 49, initially presses and fixes the board. When the striking pin 25 contacts the pressure sensor 26 and reaches the preset value, the electromagnet 6 inside the upper movable slot 47 is always energized. The electromagnet 6 and the magnetic block 5 of the pressing plate 48 generate a magnetic attraction force. The pressing plate 48 slides within the movable groove 47, causing one side of the pressing plate 48 to retract into the movable groove 47, while simultaneously pressing the second pressure spring 49. The optical detector 24 then detects the portion of the wood panel that is obscured by the pressing plate 48. When the wood panel needs to be flipped, the servo motor 42 drives the flipping frame 43 to rotate 180°. After the flipping is completed, the other side of the panel can be inspected for cracks according to the working principle of the detection component 2. Then, the electromagnet 6 is de-energized, and under the action of the second pressure spring 49 and the first pressure spring 46, the pressing plate 48 and the movable frame 45 return to their initial positions. It should be noted that the output shaft of the servo motor 42 is equipped with a rotating conductive slip ring. The wiring of electrical components such as the electromagnet 6 and the first pressure sensor 26 inside the flip frame 43 is connected to the rotor end of the conductive slip ring, and is uniformly led out from the stator end of the conductive slip ring to the controller 3 on the machine body 1. This enables the transmission of electrical energy and signals between moving and stationary parts without entanglement, ensuring that the cable will not be torn when the flip frame 43 performs a 180° flip detection. The machine body 1 is also equipped with an external photoelectric switch that is electrically connected to the controller 3. Before the servo motor 42 drives the flipping frame 43 to rotate 180°, the controller 3 must first receive a confirmation signal that the cylinder 81 extension end has completely returned to the original position and the optical detector 24 has returned to the zero position at the end of the guide rail. If the above reset signal is not received, the controller 3 will lock the flipping program of the servo motor 42 and light up the warning light 27. During the detection of the wood board by the optical detector 24, the pressing plate 48 used to lock the wood board will automatically retract into the movable groove 47 when the optical detector 24 approaches the left and right edges. At the same time, the wood board being detected can be quickly flipped, so that the detection efficiency of the optical detector 24 on the wood board is guaranteed.

[0030] like Figures 2 to 5 As shown, the machine body 1 is provided with a bending assembly 8 inside, and the bending assembly 8 includes a cylinder 81 fixedly connected to the lower side of the machine body 1.

[0031] A push block 82 is fixedly connected to the telescopic end of the cylinder 81. Fixed cylinders 83 are fixedly connected to both the left and right sides of the push block 82. A limit rod 84 is slidably connected through the upper inside of the fixed cylinder 83. A sealing ring 87 is sleeved on the outer surface of the part of the limit rod 84 inside the fixed cylinder 83. A laser rangefinder 85 is fixedly connected to the lower inside of the fixed cylinder 83. A third pressure spring 86 is fixedly connected between the bottom end of the limit rod 84 and the lower inside of the fixed cylinder 83.

[0032] The upper side of the push block 82 is arc-shaped, and the top of the limiting rod 84 is fixedly connected to the extrusion plate 88. The position of the extrusion plate 88 is higher than the uppermost end face of the push block 82.

[0033] By adopting the above technical solution, when it is necessary to test the bending performance of wood panels, the cylinder 81 on the lower side of the machine body 1 is activated. When the telescopic end of the cylinder 81 extends upward, it drives the push block 82 fixed thereto to move upward. The upper side of the push block 82 is arc-shaped. As the push block 82 moves upward, it gradually applies an upward force to the wood panel, causing the panel to bend slightly, revealing the fine cracks on the surface of the wood panel. The fixed cylinders 83 fixedly connected to the left and right sides of the push block 82 also move upward accordingly. The limiting rods 84 inside the fixed cylinders 83 are positioned on the wood panel. Under the reaction force, it slides downward relative to the fixed cylinder 83. The outer surface of the part of the limiting rod 84 inside the fixed cylinder 83 is fitted with a sealing ring 87. During the downward sliding of the limiting rod 84, the third pressure spring 86 is compressed. At the same time, the laser rangefinder 85 fixedly connected to the lower side inside the fixed cylinder 83 monitors the movement range of the limiting rod 84 in real time and transmits the signal to the controller 3. The greater the movement distance, the thicker the wood board is, and vice versa. At this time, the controller 3 will adjust the upward extension length of the extension end of the cylinder 81 accordingly. It should be noted that when the impact pin 25 contacts the pressure sensor 26, the cylinder 81 begins to retract, causing the push block 82 to separate from the wooden board. After the wooden board loses the pressure from the push block 82, it returns to its original shape. Since the wooden board is pushed upward by the push block 82 during the detection process, and the two sides of the wooden board are locked by the pressing plate 48, the wooden board always exhibits a slight arc-shaped bend, which makes it easier for the optical detector 24 to detect the fine cracks on the surface of the wooden board.

[0034] like Figure 1 , Figure 2 and Figure 6As shown, the inner and outer sides of the body 1 are provided with a cleaning assembly 9, which includes a support platform 91 fixedly connected to the front side of the body 1.

[0035] The support platform 91 is U-shaped. The support platform 91 and the upper side of the body 1 have two sliding grooves 92. The sliding grooves 92 are slidably connected to the inside of the sliding grooves 92. The upper side of the sliding strip 93 is fixedly connected to the lower side of the bracket 41. The lower side of the sliding strip 93 is rotatably connected to multiple rollers 94. The outer surface of the rollers 94 rolls in contact with the lower inside of the sliding groove 92. The front side of the enclosed box 21 and the front side of the body 1 are both fixedly connected to the fixing plate 95. The opposite surfaces of the upper and lower fixing plates 95 are fixedly connected to the cleaning cotton 96. The upper and lower cleaning cotton 96 are distributed on the upper and lower sides of the bracket 41.

[0036] By adopting the above technical solution, when the bracket 41 slides between the body 1 and the enclosed box 21, because the support platform 91 and the upper side of the body 1 are jointly provided with two sliding grooves 92, and the sliding strips 93 slide inside the sliding grooves 92, and the upper side of the sliding strips 93 is fixedly connected to the lower side of the bracket 41, and the lower side of the sliding strips 93 is rotatably connected with multiple rollers 94, the outer surface of the rollers 94 makes rolling contact with the lower side of the sliding grooves 92, so that the bracket 41 can slide smoothly in the sliding grooves 92. During the sliding process of the bracket 41, because the cleaning cotton 96 is distributed on the upper and lower sides of the bracket 41, the cleaning cotton 96 can slide smoothly in the sliding grooves 92. On both sides, the cleaning cotton 96 provided on the fixing plate 95 fixed to the front side of the enclosed box 21 and the front side of the machine body 1 will clean the flipping frame 43 on the bracket 41 and the surface of the wooden board placed on the flipping frame 43. As the bracket 41 moves, the upper cleaning cotton 96 cleans the upper surface of the flipping frame 43 and the board, and the lower cleaning cotton 96 cleans the lower surface of the flipping frame 43 and the board. This can remove dust, wood chips and other impurities from the surface of the wooden board, avoid impurities affecting the detection accuracy of the optical detector 24 for cracks, and ensure the accuracy of the detection results.

[0037] Working principle: During operation, the wooden board is placed into the closed box 21 via the flipping assembly 4, and the top cover 28 is closed. The electric guide rail 22 drives the optical detector 24 to move and detect cracks. When a crack is detected, the striker 25 presses against the pressure sensor 26. The controller 3 controls the warning light 27 to light up and displays the crack information on the display panel 29. In the flipping assembly 4, the left side of the bracket 41 has a servo motor 42 that can drive the flipping frame 43 to flip. When the striker 25 contacts the pressure sensor 26, the electromagnet 6 is energized, causing the pressing plate 48 to retract into the movable groove 47. After flipping, the power is cut off, and the pressing plate 48 returns to its original position under the action of the spring. The machine body 1 has a bending assembly 8, and a cylinder 81 with a telescopic end connected to a push block 82. The cylinder 81 drives the push block 82 to lift the plate upward. The laser rangefinder 85 monitors the movement range of the limit rod 84 in real time and transmits a signal to the controller 3 to adjust the telescopic length of the cylinder 81. The machine body 1 has cleaning assemblies 9 on its inner and outer sides. The support platform 91 and the upper side of the machine body 1 have a sliding groove 92. The slide bar 93 slides in the groove and is connected to the bracket 41 on the upper side. There is a roller 94 on the lower side. There is a cleaning cotton 96 between the closed box 21 and the front fixed plate 95 of the machine body 1. When the bracket 41 slides, the cleaning cotton 96 cleans the flipping frame 43 and the upper and lower surfaces of the plate to remove impurities.

[0038] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and its improved concepts, should be covered within the scope of protection of the present invention.

Claims

1. A device for detecting cracks in wood-based panels, comprising a body (1), characterized in that: The upper side of the body (1) is provided with a detection component (2). The detection component (2) includes a closed box (21) fixedly connected to the upper side of the body (1). Electric guide rails (22) are fixedly connected to the front and rear sides inside the closed box (21). A slider (23) is slidably connected inside the electric guide rail (22). An optical detector (24) is fixedly connected to the opposite surfaces of the sliders (23) on the front and rear sides. A striker (25) is fixedly connected to the left and right sides of the optical detector (24). A pressure sensor (26) is fixedly connected to the left and right sides inside the closed box (21). A warning light (27) is fixedly connected to the left and right sides of the front end of the closed box (21). A top cover (28) is hinged to the upper side of the closed box (21). A display panel (29) is fixedly connected to the front side of the closed box (21). A controller (3) is fixedly connected to the right side of the front end of the closed box (21). A diffuse reflection coating is provided on the inner surface of the closed box (21) and the lower side of the top cover (28).

2. The wood-based panel crack detection device according to claim 1, characterized in that: After the striker (25) moves, it presses against the outer surface of the pressure sensor (26), and the striker (25) and the pressure sensor (26) are on the same horizontal line.

3. The wood-based panel crack detection device according to claim 2, characterized in that: The inner and outer sides of the enclosed box (21) are provided with a material turning assembly (4), which includes a bracket (41) that is slidably connected between the machine body (1) and the enclosed box (21).

4. The wood-based panel crack detection device according to claim 3, characterized in that: A servo motor (42) is fixedly connected to the left side of the bracket (41). The output end of the servo motor (42) passes through the left side of the bracket (41). A flip frame (43) is fixedly connected to the output end of the servo motor (42). The bracket (41) surrounds the outside of the flip frame (43). Grooves (44) are provided on both the left and right sides inside the flip frame (43). Moving frames (45) are slidably connected to the upper and lower sides inside the grooves (44). A first pressure spring (46) is fixedly connected between the upper and lower moving frames (45). The moving frames (45) and the extrusion plate (48) are both "L" shaped. A column (7) is fixedly connected to the side of the horizontal part of the upper and lower moving frames (45) that is far apart. The upper and lower columns (7) pass through the upper and lower sides inside the grooves (44). Extrusion plates (48) are slidably connected to the opposite sides of the vertical part of the left and right moving frames (45).

5. The wood-based panel crack detection device according to claim 4, characterized in that: The flipping frame (43) is U-shaped. The vertical part of the moving frame (45) is provided with a movable groove (47). The vertical part of the extrusion plate (48) is slidably connected to the movable groove (47). Multiple second pressure springs (49) are fixedly connected between the inner side wall of the movable groove (47) and the vertical part of the extrusion plate (48). A magnet (5) is fixedly connected to the side of the vertical part of the extrusion plate (48) near the second pressure springs (49). An electromagnet (6) is fixedly connected to the side of the movable groove (47) away from the extrusion plate (48). The electromagnet (6) and the magnet (5) are magnetically attracted to each other.

6. The wood-based panel crack detection device according to claim 5, characterized in that: The body (1) is provided with a bending assembly (8) inside, the bending assembly (8) including a cylinder (81) fixedly connected to the lower side inside the body (1).

7. A crack detection device for wood-based panels according to claim 6, characterized in that: The cylinder (81) is fixedly connected to a push block (82) at its telescopic end. Fixed cylinders (83) are fixedly connected to both the left and right sides of the push block (82). A limit rod (84) is slidably connected through the upper inner side of the fixed cylinder (83). A sealing ring (87) is fitted on the outer surface of the portion of the limit rod (84) inside the fixed cylinder (83). A laser rangefinder (85) is fixedly connected to the lower inner side of the fixed cylinder (83). A third pressure spring (86) is fixedly connected between the bottom end of the limit rod (84) and the lower inner side of the fixed cylinder (83).

8. The wood-based panel crack detection device according to claim 7, characterized in that: The upper side of the push block (82) is arc-shaped, and the top end of the limiting rod (84) is fixedly connected to the extrusion plate (88), which is positioned higher than the uppermost end face of the push block (82).

9. A crack detection device for wood-based panels according to claim 8, characterized in that: The inner and outer sides of the body (1) are provided with a cleaning assembly (9), which includes a support platform (91) fixedly connected to the front side of the body (1).

10. A crack detection device for wood-based panels according to claim 9, characterized in that: The support platform (91) is U-shaped. The support platform (91) and the upper side of the body (1) have two sliding grooves (92). The sliding groove (92) is slidably connected to a slide bar (93). The upper side of the slide bar (93) is fixedly connected to the lower side of the bracket (41). The lower side of the slide bar (93) is rotatably connected to multiple rollers (94). The outer surface of the rollers (94) is in rolling contact with the lower side of the sliding groove (92). The front side of the enclosed box (21) and the front side of the body (1) are both fixedly connected to a fixing plate (95). The opposite surfaces of the fixing plates (95) on the upper and lower sides are fixedly connected to cleaning cotton (96). The cleaning cotton (96) on the upper and lower sides is distributed on the upper and lower sides of the bracket (41).

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