Device and method for detecting hardness of artificial board for furniture

Abstract

The invention relates to a hardness detection device and method for an artificial panel for furniture, and belongs to the technical field of hardness detection.The hardness detection device comprises a hardness tester body, a segmentation processing detection assembly comprises a U-shaped mounting base and a hydraulic rod arranged on the hardness tester body, and a connecting rod is rotationally connected with the inner walls of the two sides of the U-shaped mounting base through a rotating shaft; the limiting mechanism is arranged on the U-shaped mounting seat, the cutting head is arranged at one end of the connecting rod and is coaxial with the center line of the connecting rod, a plurality of radial blades and a plurality of annular blades are radially arranged on the end face, away from the connecting rod, of the cutting head at equal intervals, and the ball is arranged at the other end of the connecting rod and is coaxial with the center line of the connecting rod. A plurality of radial blades and annular blades on the cutting head are used for forming an annular cutting net, a PVC film on the surface of an artificial board is cut, a ball body is pressed into the artificial board from the position of the cut PVC film, the PVC film at the position is cut into a plurality of small blocks, resistance interference generated on pressing-in of a steel ball can be avoided, and the service life of the steel ball is prolonged. And the accuracy of detecting the hardness of the artificial board is improved.

Description

Technical Field

[0001] This invention belongs to the field of hardness testing technology, specifically relating to a device and method for testing the hardness of engineered wood products for furniture. Background Technology

[0002] Hardness measures the strength of a material and is a key indicator of material performance. For furniture products made of wood panels, testing the hardness of the panels can reveal their density, structural uniformity, and the presence of structural defects, thus determining whether the furniture meets quality requirements. Current technology for testing the hardness of furniture panels primarily uses the Janka hardness test. This method involves applying a load to a steel ball using a hydraulic rod of a hardness tester, pressing it into the surface of the panel, and then measuring the depth of the ball's embedment or the diameter of the indentation to obtain the hardness value. To avoid the loose fibers or gaps between particles in the panel affecting the accuracy of the hardness test, the outer diameter of the steel ball used is typically around 10mm to 12mm, and the applied load must press the steel ball into the panel to a sufficient depth to ensure that the indentation depth or diameter accurately reflects the hardness of the panel, unaffected by the fiber or particle structure.

[0003] However, when testing various types of engineered wood products using the Janka hardness test method, the actual strength of the engineered wood products is often less than the hardness value obtained from the test. This situation makes it impossible for industrial product inspection and testing institutions to accurately test the hardness of engineered wood products, resulting in ineffective quality control of engineered wood furniture products. An investigation into the process of using the Janka hardness test method to test the hardness of engineered wood products revealed that the root cause affecting the accuracy of hardness testing lies in the surface layer of the engineered wood products (generally a PVC film with a thickness ranging from 0.07mm to 0.5mm). During hardness testing, when a steel ball is pressed into the board, the PVC film undergoes varying degrees of plastic deformation, creating resistance to the steel ball and reducing the embedding depth or indentation diameter. This leads to a hardness value obtained that is greater than the actual strength of the engineered wood product. Especially when a larger outer diameter steel ball is used, the area of ​​the PVC film undergoing plastic deformation during steel ball insertion increases, further increasing the resistance to the steel ball and further widening the deviation between the obtained hardness value and the actual hardness of the engineered wood product.

[0004] Currently, when testing the hardness of engineered wood products, considering the influence of the PVC film, a method of cutting away part of the PVC film on the surface of the engineered wood product with a knife is often used. The steel ball is then pressed into the product from the point where the PVC film was removed, avoiding resistance from the PVC film and thus improving the accuracy of the hardness test. Because engineered wood products are manufactured by combining wood fibers, particles, or other materials through manual processing, gluing, and pressing, the products themselves have poor waterproofing, moisture resistance, and aesthetics. During the manufacturing process, PVC film is glued to the surface of the engineered wood product, and then hot or cold pressing is used to ensure a smooth and firm bond between the PVC film and the product, thereby improving its waterproofing, moisture resistance, and aesthetics. However, removing part of the PVC film from the surface of the engineered wood product is difficult, and the resulting uneven surface leads to unevenness in the indentation formed after the steel ball is pressed into the product, thus affecting the accuracy of the measurement of the steel ball embedding depth or indentation diameter. Summary of the Invention

[0005] In view of this, the present invention provides a device and method for testing the hardness of engineered wood products for furniture, in order to overcome the shortcomings of the prior art. The present invention improves the accuracy of hardness testing of engineered wood products when using the Janka hardness test method.

[0006] The technical solution of this invention is: a hardness testing device for engineered wood products used in furniture, comprising a hardness tester body and a segmentation and processing testing component. The segmentation and processing testing component includes a U-shaped mounting base, vertically mounted on a hydraulic rod of the hardness tester body. The opening of the U-shaped mounting base faces downward, and its bottom is fixedly connected to the lower end of the hydraulic rod. A connecting rod is vertically mounted in the U-shaped mounting base and rotatably connected to the inner walls of both sides of the U-shaped mounting base via a rotating shaft. A limiting mechanism is mounted on the U-shaped mounting base, and the output end of the limiting mechanism is movably connected to the connecting rod. After rotating 180°, the connecting rod is limited to maintain its vertical orientation. In this configuration, the cutting head is positioned at one end of the connecting rod and is coaxial with its centerline. Multiple radial blades and multiple annular blades are arranged radially and at equal intervals on the end face of the cutting head away from the connecting rod. The annular blades are coaxial with the centerline of the connecting rod. The multiple radial blades and the annular blades form an annular cutting mesh. When the cutting head is at the lower end of the connecting rod, the hydraulic rod drives the cutting head downwards to cut the PVC film on the surface of the engineered wood panel. A sphere is positioned at the other end of the connecting rod and is coaxial with its centerline. When the sphere is at the lower end of the connecting rod, the hydraulic rod drives the sphere to press into the engineered wood panel from the position of the cut PVC film.

[0007] Preferably, the spacing between adjacent annular blades gradually decreases from the inside to the outside along the radial direction of the cutting head.

[0008] Preferably, the number of radial cutting edges between adjacent annular cutting edges increases by 0 to 2 times from the inside to the outside along the radial direction of the cutting head.

[0009] Preferably, the cutting head is fixed with conical nails in the squares of the annular cutting mesh. The conical nails are arranged in the middle of the squares, and the outer diameter of the conical nails gradually decreases from one end near the cutting head to the other end. The area of ​​the bottom of the conical nail accounts for 10% to 30% of the area of ​​the square.

[0010] Preferably, the outer side of the conical nail is fixed with multiple radially spaced, equally spaced, and the radially spaced, equally spaced, radially ...

[0011] Preferably, the height of the busbar blade gradually increases from one end near the top of the conical nail to the other end.

[0012] Preferably, the limiting mechanism includes: a limiting pin and two through holes opened on the connecting rod. The two through holes are symmetrically arranged on both sides of the rotating shaft. The limiting pin is horizontally set on the U-shaped mounting base. One end of the limiting pin is movably connected to the U-shaped mounting base, and the other end is inserted into the through hole and connected thereto.

[0013] Preferably, two connecting plates are vertically arranged on the outer side of the U-shaped mounting base. The rotating shaft is located between the two connecting plates and is parallel to them. The upper end of the connecting plate is hinged to the U-shaped mounting base. Limiting pins are respectively fixed on the side of the two connecting plates that are close to each other. The two limiting pins are respectively inserted from both ends of the through hole. An elastic traction member is provided between the connecting plate and the U-shaped mounting base to drive the connecting plate to rotate towards the side closer to the connecting rod.

[0014] Preferably, the top of the U-shaped mounting base is provided with a horizontal support plate. The upper side of the support plate is fixedly connected to the lower end of the hydraulic rod. A connecting arm is fixedly fixedly on the lower side of the support plate. The connecting arm passes through the bottom of the U-shaped mounting base and extends into its interior. It is slidably connected to the U-shaped mounting base along its length. A frustum is fixedly provided at the end of the connecting arm away from the support plate. The frustum abuts against the cutting head or a ball. Two connecting plates are vertically arranged on the outer side of the U-shaped mounting base. The rotating shaft is located between the two connecting plates and is parallel to them. The upper end of the connecting plate is hinged to the support plate. An elastic traction member is provided between the connecting plate and the support plate to drive the connecting plate to rotate towards the side closer to the connecting rod.

[0015] A method for using a hardness testing device for engineered wood products used in furniture includes the following steps: The artificial board is fixed on the placement platform of the hardness tester body; The rotating connecting rod positions the cutting head at the lower end of the connecting rod. The limiting mechanism limits the connecting rod to keep it in a vertical position. The hardness tester body is activated, causing the hydraulic rod to drive the cutting head downward into the PVC film on the surface of the artificial board. After that, the hydraulic rod drives the cutting head upward to separate it from the PVC film. Rotate the connecting rod again so that the ball is located at the lower end of the connecting rod. Use the limiting mechanism to limit the connecting rod so that it remains in a vertical state. Start the hardness tester body so that the hydraulic rod drives the ball downward to press into the surface of the artificial board. Then, the hydraulic rod drives the ball upward to separate it from the artificial board. The hardness of the artificial board is obtained by measuring the depth or diameter of the pit formed by the sphere being pressed into the surface of the board.

[0016] Compared with existing technologies, the present invention provides a device and method for testing the hardness of engineered wood products for furniture. The hardness tester body, along with a U-shaped mounting base, connecting rod, limiting mechanism, cutting head, and ball in a segmentation and testing component, works in conjunction with the component. Before testing the hardness of the engineered wood product, the connecting rod is rotated 180° to position the cutting head at its lower end. A hydraulic rod on the hardness tester body drives the cutting head downwards, using multiple radial and annular blades on the cutting head to form an annular cutting mesh that segments the PVC film on the surface of the engineered wood product. The connecting rod is then rotated another 180° to position the ball at its lower end. The hydraulic rod then drives the ball to press into the engineered wood product from the segmented PVC film location. Because the PVC film at this location is segmented into multiple small pieces, resistance interference to the ball's insertion is avoided, thereby improving the accuracy of the hardness test. Furthermore, it eliminates the need to remove the PVC film from the surface of the engineered wood product using a cutting tool. Attached Figure Description

[0017] Figure 1 This is a front view of the first state of the hardness testing device of the present invention; Figure 2 This is a front view of the second state of the hardness testing device of the present invention; Figure 3 This is a side view of the first state of the hardness testing device of the present invention; Figure 4 This is a front view of the segmentation processing and detection component of the present invention; Figure 5 This is a side view of the segmentation processing and detection component of the present invention; Figure 6 This is the present invention. Figure 4 AA section view in the middle; Figure 7 This is the present invention. Figure 5 BB section view in the middle; Figure 8 This is a schematic diagram of the first arrangement of the annular cutting mesh of the present invention; Figure 9 This is a schematic diagram of the second arrangement of the annular cutting mesh of the present invention; Figure 10 This is the present invention. Figure 8 CC section view in the middle; Figure 11This is a front view of the conical nail of the present invention; Figure 12 This is a schematic diagram of the open state of the connecting plate of the segmentation processing and detection component of the present invention; Figure 13 This is a top view of the connecting arm and the frustum of the present invention. Detailed Implementation

[0018] This invention provides a device and method for testing the hardness of engineered wood products used in furniture. The following is a description of the device and method. Figures 1 to 13 The present invention is illustrated by the structural diagram shown below.

[0019] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the technical solution of this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0020] Reference Figure 1 , Figure 2 , Figure 3 , Figure 1 This is a front view of the first state of the hardness testing device in this embodiment. Figure 2 This is a front view of the second state of the hardness testing device in this embodiment. Figure 3 This is a side view of the first state of the hardness testing device in this embodiment. A hardness testing device for engineered wood products used in furniture includes a hardness tester body 16 and a segmentation and processing testing component. (Refer to...) Figure 4 , Figure 6 , Figure 4 This is a front view of the segmentation processing detection component in this embodiment. Figure 6This is a cross-sectional view (AA) of the segmentation processing and detection assembly in this embodiment. The segmentation processing and detection assembly includes a U-shaped mounting base 1, which is vertically mounted on the hydraulic rod 17 of the hardness tester body 16. The opening of the U-shaped mounting base 1 faces downward, and its bottom is fixedly connected to the lower end of the hydraulic rod 17. A connecting rod 2 is vertically mounted in the U-shaped mounting base 1. The connecting rod 2 is rotatably connected to the inner walls of both sides of the U-shaped mounting base 1 through a rotating shaft 3. A limiting mechanism is mounted on the U-shaped mounting base 1, and the output end of the limiting mechanism is movably connected to the connecting rod 2. After rotating 180°, the connecting rod 2 is limited to maintain a vertical state. A cutting head 4 is mounted on the connecting rod 2. One end of the cutting head 4 is coaxial with its center line. On the end face of the cutting head 4 away from the connecting rod 2, multiple radial blades 5 and multiple annular blades 6 are arranged radially at equal intervals. The annular blades 6 are coaxial with the center line of the connecting rod 2. The multiple radial blades 5 and the annular blades 6 form an annular cutting mesh. When the cutting head 4 is located at the lower end of the connecting rod 2, the hydraulic rod 17 drives the cutting head 4 downward to cut the PVC film on the surface of the artificial board. The ball 7 is located at the other end of the connecting rod 2 and is coaxial with its center line. When the ball 7 is located at the lower end of the connecting rod 2, the hydraulic rod 17 drives the ball 7 to press into the artificial board from the position of the cut PVC film.

[0021] In this embodiment, a hardness testing device for engineered wood panels is composed of a hardness tester body 16 and a segmentation and detection component. A U-shaped mounting base 1 allows the connecting rod 2 to rotate, adjusting the positions of the cutting head 4 and the ball 7 mounted at both ends of the connecting rod 2. Before hardness testing, the cutting head 4 is positioned at the lower end of the connecting rod 2. Using the hydraulic rod 17 on the hardness tester body 16, a ring-shaped cutting mesh composed of multiple radial blades 5 and annular blades 6 on the cutting head 4 is used to segment a region of the PVC film on the surface of the engineered wood panel 21, dividing the PVC film into multiple small pieces. The ball 7 is then positioned at the lower end of the connecting rod 2. Using the hydraulic rod 17 on the hardness tester body 16, the ball 7 is pressed into the engineered wood panel from the segmented area of ​​the PVC film. This avoids interference from the PVC film on the surface of the engineered wood panel 21, ensuring that the hardness value obtained matches the actual hardness of the engineered wood panel, thereby improving the accuracy of the hardness test.

[0022] Specifically, in this embodiment, after adjusting the positions of the cutting head 4 and the ball 7 by means of the connecting rod 2, the position of the connecting rod 2 is fixed by means of the limiting mechanism, so that the connecting rod 2 is in a vertical state whether it is cutting the PVC film on the artificial board 21 or pressing the ball 7 into the artificial board 21. This makes it convenient to use the hydraulic rod 17 of the hardness tester body 16 to apply a downward load to the cutting head 4 and the ball 7, so that the annular cutting mesh on the cutting head 4 can smoothly cut the PVC film and the ball 7 can be embedded into the surface of the artificial board 21.

[0023] Specifically, the diameter of the outermost annular blade 6 on the cutting head 4 is larger than the diameter of the sphere 7, thereby ensuring that the PVC film in the area where the sphere 7 is pressed in is cut.

[0024] Reference Figure 8 , Figure 8 This is a schematic diagram of the first arrangement of the annular cutting mesh in this embodiment. As a further optimization, in this embodiment, the spacing between adjacent annular blades 6 gradually decreases from the inside to the outside along the radial direction of the cutting head 4.

[0025] As the PVC film at locations farther from the center line of the sphere 7 undergoes greater plastic deformation when the sphere 7 is pressed into the artificial board 21, the spacing between adjacent annular blades 6 in this embodiment gradually decreases from the inside out. This allows the multiple radial blades 5 and annular blades 6 to form an annular cutting mesh to cut the PVC film on the surface of the artificial board 21, resulting in a smaller area of ​​the outer block-shaped PVC film. This eliminates the resistance interference caused by the PVC film on the surface of the artificial board 21 pressing into the sphere 7, further improving the accuracy of hardness testing of the artificial board.

[0026] In addition, the closer the PVC film is to the center line of the sphere 7, the smaller the plastic deformation, and the smaller the resistance interference generated by pressing the sphere 7. The larger area of ​​the block PVC film near the center line of the sphere 7 can reduce the load required for the hydraulic rod 17 to drive the cutting head 4 to press into the PVC film on the surface of the artificial board 21 for segmentation, thereby minimizing the deformation caused by the cutting head 4 squeezing the artificial board 21, and further ensuring the accuracy of the hardness test of the artificial board.

[0027] As a further optimization, in this embodiment, the number of radial blades 5 between adjacent annular blades 6 increases sequentially from the inside to the outside along the radial direction of the cutting head 4 by 0 to 2 times.

[0028] Specifically, refer to Figure 9 , Figure 9 This is a schematic diagram of the second arrangement of the annular cutting mesh in this embodiment. The innermost radial blade 5 has 8 blades, the middle layer has 16 blades, and the outermost layer has 32 blades. That is, the number of radial blades 5 between adjacent annular blades 6 increases by 1 times from the inside to the outside along the radial direction of the cutting head 4. The number and area of ​​the corresponding grid of the annular cutting mesh also change accordingly.

[0029] Specifically, refer to Figure 8 The number of radial cutting edges 5 in the innermost, middle, and outermost layers is 16 each. That is, the number of radial cutting edges 5 between adjacent annular cutting edges 6 does not increase from the inside to the outside along the radial direction of the cutting head 4, and the number of radial cutting edges 5 between adjacent annular cutting edges 6 is the same.

[0030] In this embodiment, the number of radial blades 5 between adjacent annular blades 6 increases sequentially from the inside to the outside along the radial direction of the cutting head 4 by 0 to 2 times. This results in a larger number of PVC films being divided at positions farther from the center line of the sphere 7, and a smaller area for each block of PVC film at these positions. This further eliminates the resistance interference caused by the PVC film on the surface of the artificial board 21 pressing into the sphere 7. Conversely, the number of PVC films being divided at positions closer to the center line of the sphere 7 decreases, and the area for each block of PVC film at these positions increases. This further reduces the deformation caused by the cutting head 4 squeezing the artificial board 21, thereby improving the overall accuracy of hardness detection of the artificial board.

[0031] In this embodiment, the farther away from the center line of the sphere 7, the more block-shaped PVC films are divided, resulting in a corresponding reduction in the area of ​​the block-shaped PVC films. The distance between the adjacent annular blades 6 in the previous embodiment gradually decreases from the inside to the outside, and the resulting gradual reduction in area from the inside to the outside can be arranged simultaneously. This allows for the control of the division area by the width (along the arc direction of the annular blades 6) and length (along the length direction of the radial blades 5) of the block-shaped PVC films. Under the premise of eliminating the resistance interference caused by the plastic deformation of the PVC film on the surface of the artificial board 21 to the pressing of the sphere 7, the deformation caused by the extrusion of the cutting head 4 on the artificial board 21 is further reduced. This avoids the deformation of the artificial board 21 caused by the cutting head 4 before the sphere 7 is pressed into the artificial board 21, which would affect the accuracy of hardness detection.

[0032] Reference Figure 10 , Figure 10 This is a CC cross-sectional view of the cutting head in this embodiment. As a further optimization, in this embodiment, the cutting head 4 is fixed with conical nails 8 in the squares of the annular cutting mesh. The conical nails 8 are arranged in the middle of the squares. The outer diameter of the conical nails 8 gradually decreases from one end near the cutting head 4 to the other end. The area of ​​the bottom of the conical nail 8 accounts for 10% to 30% of the area of ​​the square.

[0033] In this embodiment, by setting conical nails 8 in the squares of the annular cutting mesh, when the cutting head 4 presses down into the PVC film on the surface of the artificial board 21 to divide it into multiple block-shaped PVC films, the conical nails 8 can penetrate through the middle of the block-shaped PVC film. The area of ​​the bottom of the conical nail 8 accounts for 10% to 30% of the area of ​​the square. As the area of ​​the square where the conical nail 8 is located decreases from the inside to the outside, the area of ​​the bottom of the conical nail 8 in the square also decreases from the inside to the outside. This significantly reduces the stiffness of the holes created by the conical nail 8 on the block-shaped PVC film, reduces its ability to plastically deform in all directions, and reduces the force required for the conical nail 8 to penetrate the block-shaped PVC film, thereby further reducing the deformation caused by the cutting head 4 squeezing the artificial board 21.

[0034] In this embodiment, the area of ​​the bottom of the conical nail 8, which is set in the outermost square of the annular cutting mesh, accounts for 10% of the area of ​​the square.

[0035] In this embodiment, the area of ​​the bottom of the conical nail 8, which is set in the square in the middle area of ​​the annular cutting mesh, accounts for 20% of the area of ​​the square.

[0036] In this embodiment, the area of ​​the bottom of the conical nail 8, which is set in the innermost square of the annular cutting mesh, accounts for 30% of the area of ​​the square.

[0037] Reference Figure 11 , Figure 11 This is a front view of the conical nail in this embodiment. As a further optimization, in this embodiment, multiple generatrix blades 9 are radially and equally spaced on the outer side of the conical nail 8, and the generatrix blades 9 are parallel to each other with the generatrix of the conical nail 8.

[0038] In this embodiment, multiple main blades 9 are provided on the outside of the conical nail 8. When the conical nail 8 pierces the block PVC film, the main blades 9 cut the block PVC film, thereby forming a central hole and multiple radial cutting seams in the block PVC film. The cutting seams are connected to the central hole, further destroying the overall rigidity of the block PVC film. This ensures that the sphere 7 can avoid deformation of the segmented block PVC film when it is pressed into the artificial board.

[0039] As a further optimization, in this embodiment, the height of the busbar blade 9 gradually increases from one end near the top of the conical nail 8 to the other end.

[0040] In this embodiment, the height of the busbar blade 9 near the bottom of the conical nail 8 is greater than the height near its top. This ensures the cutting effect of the busbar blade 9 on the block PVC film and prevents the block PVC film from undergoing plastic deformation, which would result in the cut not penetrating (along the thickness direction of the block PVC film). This causes the block PVC film to lose its ability to undergo plastic deformation when it slides against the ball 7, thereby further avoiding resistance interference to the pressing of the steel ball and ensuring the accuracy of the hardness test of the artificial board.

[0041] This embodiment provides a specific structure of a limiting mechanism, which includes a limiting pin 10 and two through holes 11 opened on the connecting rod 2. The two through holes 11 are symmetrically arranged on both sides of the rotating shaft 3. The limiting pin 10 is horizontally set on the U-shaped mounting base 1. One end of the limiting pin 10 is movably connected to the U-shaped mounting base 1, and the other end is inserted into the through hole 11 and connected thereto.

[0042] This embodiment provides a specific structure for a limiting mechanism. The limiting pin 10 can be horizontally mounted on the U-shaped mounting base 1. After the connecting rod 2 rotates 180°, the limiting pin 10 is inserted into a through hole 11 on the connecting rod 2, thus securing the connecting rod 2 in a vertical position. Specifically, the limiting pin 10 can be positioned in the lower area of ​​the U-shaped mounting base 1, allowing it to cooperate with the rotating shaft 3 to secure the connecting rod 2 and maximizing its effectiveness.

[0043] As a further optimization, in this embodiment, two connecting plates 12 are vertically arranged on the outer side of the U-shaped mounting base 1. The rotating shaft 3 is located between the two connecting plates 12 and is parallel to them. The upper end of the connecting plate 12 is hinged to the U-shaped mounting base 1. The limiting pins 10 are respectively fixed on the side of the two connecting plates 12 that are close to each other. The two limiting pins 10 are respectively inserted from both ends of the through hole 11. An elastic traction member is provided between the connecting plate 12 and the U-shaped mounting base 1 to drive the connecting plate 12 to rotate towards the side closer to the connecting rod 2.

[0044] In this embodiment, two connecting plates 12 are hinged to the U-shaped mounting base 1. The connecting plates 12 drive two limiting pins 10 to be inserted from both ends of the through hole 11, which can improve the stability of limiting the connecting rod 2. After the elastic traction member drives the two connecting plates 12 to close to the U-shaped mounting base 1, it can seal both ends of the U-shaped mounting base 1, preventing the connecting rod 2 from shaking during the testing operation.

[0045] Specifically, in this embodiment, the two limiting pins 10 and the through holes 11 on the connecting rod 2 are all arc-shaped, so that the connecting plate 12 can smoothly insert the limiting pins 10 into the through holes 11 after rotation. Limiting rings are respectively fitted on the limiting pins 10. When the two limiting pins 10 are inserted into the through holes 11 and the connecting rod 2 is in a vertical state, the limiting rings abut against the outer side of the connecting rod 2, further ensuring the stability of the cutting head 4 or the ball 7 in transmitting load through the connecting rod 2 for PVC film cutting and pressing.

[0046] Reference Figure 7 , Figure 7This is a BB cross-sectional view of the segmentation processing detection component in this embodiment. As a further optimization, the top of the U-shaped mounting base 1 in this embodiment is provided with a horizontal support plate 13. The upper side of the support plate 13 is fixedly connected to the lower end of the hydraulic rod 17, and the lower side is vertically fixed with a connecting arm 14. The connecting arm 14 passes through the bottom of the U-shaped mounting base 1 and extends into its interior, and is slidably connected to the U-shaped mounting base 1 along its length. A frustum 15 is fixed at the end of the connecting arm 14 away from the support plate 13. The frustum 15 abuts against the cutting head 4 or the ball 7. Two connecting plates 12 are vertically arranged on the outer side of the U-shaped mounting base 1. The rotating shaft 3 is located between the two connecting plates 12 and is parallel to them. The upper end of the connecting plate 12 is hinged to the support plate 13. An elastic traction member is provided between the connecting plate 12 and the support plate 13 to drive the connecting plate 12 to rotate towards the side closer to the connecting rod 2.

[0047] In this embodiment, the support plate 13 works in conjunction with the connecting arm 14 and the frustum 15 to enable the segmentation processing and detection component to move vertically up and down. (Refer to...) Figure 12 , Figure 12 This is a schematic diagram of the open state of the connecting plate of the segmentation and detection component in this embodiment. After rotating the connecting rod 2 to change the position of the cutting head 4 and the ball 7, the top of the inner side of the U-shaped mounting base 1 abuts against the upper side of the frustum 15. When the two connecting plates 12 rotate to one side of the connecting rod 2, they push the U-shaped mounting base 1 upward so that the frustum 15 abuts against the cutting head 4 or the ball 7. This ensures that when the connecting rod 2 is to be limited, the connecting rod 2 is kept vertical and stable, thereby further improving the stability of the connecting rod 2. At the same time, the load output downward by the hydraulic rod 17 is transmitted to the connecting rod 2 through two paths: the connecting arm 14, the frustum 15, and the limiting pin 10 and the connecting plate 12. This causes the connecting rod 2 to drive the cutting head 4 or the ball 7 to perform segmentation and hardness detection on the artificial board.

[0048] Specifically, refer to Figure 13 , Figure 13 This is a top view of the connecting arm and the frustum in this embodiment. In order to improve the effect of the connecting arm 14 and the frustum 15 in transmitting the downward output load of the hydraulic rod 17, the cross-section of the connecting arm 14 is arc-shaped and there are two of them. The center lines of the two connecting arms 14 are coaxial with the center line of the connecting rod 2, which can also prevent the rotation between the U-shaped mounting base 1 and the support plate 13.

[0049] Specifically, the bottom of the frustum 15 is provided with a groove 19, which allows the sphere 7 to stably abut against the frustum 15. A rubber pad is provided on the outside of the groove 19 at the bottom of the frustum 15 to prevent damage to the radial cutting edge 5 and the annular cutting edge 6 when the frustum 15 abuts against the cutting head 4, thus ensuring the service life of the hardness testing device.

[0050] Specifically, refer to Figure 5 , Figure 5 This is a side view of the segmentation processing detection component in this embodiment. In this embodiment, the longitudinal section of the support plate 13 is also U-shaped. The two ends of the support plate 13 and the two ends of the U-shaped mounting base are arranged in a cross shape. The top of the connecting plate 12 is vertically provided with a mounting groove 16. The two ends of the support plate 13 extend into the groove 18 and are hinged to the connecting plate 12 through the hinge shaft.

[0051] A method for using a hardness testing device for engineered wood products used in furniture includes the following steps: The artificial board 21 is fixed on the placement platform 20 of the hardness tester body 16; Rotating the connecting rod 2 causes the cutting head 4 to be located at the lower end of the connecting rod 2. The limiting mechanism limits the connecting rod 2 to keep it in a vertical state. The hardness tester body 16 is activated so that the hydraulic rod 17 drives the cutting head 4 to press downward into the PVC film on the surface of the artificial board 21. After that, the hydraulic rod 17 drives the cutting head 4 to move upward and separate from the PVC film. Rotate the connecting rod 2 to position the ball 7 at the lower end of the connecting rod 2. Use the limiting mechanism to limit the connecting rod 2 and keep it in a vertical state. Start the hardness tester body 16 so that the hydraulic rod 17 drives the ball 7 to press down into the surface of the artificial board 21. Then, the hydraulic rod 17 drives the ball 7 to move upward and separate from the artificial board 21. The hardness of the artificial board 21 is obtained by measuring the depth or diameter of the pit formed by the sphere 7 pressing into the surface of the artificial board 21.

[0052] In this embodiment, conventional clamps can be used on the placement platform 20 to fix the artificial board 21 to the placement platform 20.

[0053] The above-disclosed embodiments are merely preferred embodiments of the present invention. However, the embodiments of the present invention are not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A device for testing the hardness of engineered wood panels used in furniture, comprising: The hardness tester body is characterized by further comprising: a segmentation processing and detection component, the segmentation processing and detection component comprising: A U-shaped mounting base is vertically mounted on the hydraulic rod of the hardness tester body. The opening of the U-shaped mounting base faces downwards, and its bottom is fixedly connected to the lower end of the hydraulic rod. A connecting rod is vertically installed in the U-shaped mounting base, and the connecting rod is rotatably connected to the inner walls of both sides of the U-shaped mounting base through a rotating shaft; A limiting mechanism is installed on a U-shaped mounting base. The output end of the limiting mechanism is movably connected to the connecting rod. After the connecting rod rotates 180°, it limits the limiting mechanism to maintain a vertical state. A cutting head is disposed at one end of the connecting rod and is coaxial with its center line. Multiple radial blades and multiple annular blades are arranged radially and at equal intervals on the end face of the cutting head away from the connecting rod. The annular blades are coaxial with the center line of the connecting rod. The multiple radial blades and annular blades form an annular cutting mesh. When the cutting head is located at the lower end of the connecting rod, the hydraulic rod drives the cutting head downward to cut the PVC film on the surface of the artificial board. A sphere is positioned at the other end of the connecting rod and is coaxial with its center line. When the sphere is located at the lower end of the connecting rod, the hydraulic rod drives the sphere to press into the artificial board from the position of the segmented PVC film.

2. The furniture-grade engineered wood panel hardness testing device according to claim 1, characterized in that, The spacing between adjacent annular blades gradually decreases from the inside to the outside along the radial direction of the cutting head.

3. The furniture engineered wood panel hardness testing device according to claim 1, characterized in that, The number of radial cutting edges between adjacent annular cutting edges increases sequentially from the inside to the outside along the radial direction of the cutting head by 0 to 2 times.

4. The furniture-grade engineered wood panel hardness testing device according to claim 1, characterized in that, The cutting head is fixed with conical nails in the squares of the annular cutting mesh. The conical nails are arranged in the middle of the squares, and the outer diameter of the conical nails gradually decreases from one end near the cutting head to the other end. The area of ​​the bottom of the conical nail accounts for 10% to 30% of the area of ​​the square.

5. The furniture-grade engineered wood panel hardness testing device according to claim 4, characterized in that, The outer side of the conical nail is fixed with multiple radially spaced, equally spaced, and the radially spaced, equally spaced, radially ...

6. The furniture-grade engineered wood panel hardness testing device according to claim 5, characterized in that, The height of the busbar blade gradually increases from one end near the top of the conical nail to the other end.

7. The furniture engineered wood panel hardness testing device according to claim 1, characterized in that, The limiting mechanism includes a limiting pin and two through holes opened on the connecting rod. The two through holes are symmetrically arranged on both sides of the rotating shaft. The limiting pin is horizontally set on the U-shaped mounting base. One end of the limiting pin is movably connected to the U-shaped mounting base, and the other end is inserted into the through hole and connected thereto.

8. The furniture-grade engineered wood panel hardness testing device according to claim 7, characterized in that, Two connecting plates are vertically arranged on the outer side of the U-shaped mounting base. The rotating shaft is located between the two connecting plates and is parallel to them. The upper end of the connecting plate is hinged to the U-shaped mounting base. Limiting pins are respectively fixed on the side of the two connecting plates that are close to each other. The two limiting pins are respectively inserted from both ends of the through hole. An elastic traction member is provided between the connecting plate and the U-shaped mounting base to drive the connecting plate to rotate towards the side closer to the connecting rod.

9. The furniture-grade engineered wood panel hardness testing device according to claim 7, characterized in that, The top of the U-shaped mounting base is horizontally provided with a support plate. The upper side of the support plate is fixedly connected to the lower end of the hydraulic rod. A connecting arm is vertically fixed on its lower side. The connecting arm passes through the bottom of the U-shaped mounting base and extends into its interior. It is slidably connected to the U-shaped mounting base along its length. A frustum is fixed at the end of the connecting arm away from the support plate. The frustum abuts against the cutting head or a ball. Two connecting plates are vertically provided on the outer side of the U-shaped mounting base. The rotating shaft is located between the two connecting plates and is parallel to them. The upper end of the connecting plate is hinged to the support plate. An elastic traction member is provided between the connecting plate and the support plate to drive the connecting plate to rotate towards the side closer to the connecting rod.

10. The method of using the furniture engineered wood hardness testing device according to any one of claims 1-9, characterized in that, Includes the following steps: The artificial board is fixed on the placement platform of the hardness tester body; The rotating connecting rod positions the cutting head at the lower end of the connecting rod. The limiting mechanism limits the connecting rod to keep it in a vertical position. The hardness tester body is activated, causing the hydraulic rod to drive the cutting head downward into the PVC film on the surface of the artificial board. After that, the hydraulic rod drives the cutting head upward to separate it from the PVC film. Rotate the connecting rod again so that the ball is located at the lower end of the connecting rod. Use the limiting mechanism to limit the connecting rod so that it remains in a vertical state. Start the hardness tester body so that the hydraulic rod drives the ball downward to press into the surface of the artificial board. Then, the hydraulic rod drives the ball upward to separate it from the artificial board. The hardness of the artificial board is obtained by measuring the depth or diameter of the pit formed by the sphere being pressed into the surface of the board.

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