A bending detection device for fiberboard processing and a detection method thereof

Abstract

The application discloses a bending detection device for fiberboard processing and a detection method thereof, and relates to the technical field of fiberboard detection devices. The existing detection device is used for measuring the flatness of the fiberboard by various measuring instruments when detecting the fiberboard, and the operation is relatively complicated, which causes the detection of the fiberboard after bending processing to be inconvenient. The device comprises a bearing platform, a detection frame is arranged on the rear end surface of the bearing platform, a positioning seat is arranged on the upper end of the bearing platform, a top seat plate is arranged on the upper end of the positioning seat, and the top seat plate is integrally arranged with the positioning seat. The device further comprises an embedded groove arranged on the upper end of the top seat plate, the embedded groove is integrally arranged with the top seat plate, an electromagnet suction plate is arranged in the embedded groove, the electromagnet suction plate is fixedly connected with the embedded groove through adhesive bonding, a positioning block is arranged on the upper end of the electromagnet suction plate, the positioning block is fixedly connected with the electromagnet suction plate through adhesive-free glue, and a movable support plate is arranged at one end of the positioning block.

Description

Technical Field

[0001] This invention relates to the field of fiberboard testing equipment, specifically to a bending testing device and method for fiberboard processing. Background Technology

[0002] Fiberboard is a type of engineered wood product made by interlacing lignocellulosic fibers and utilizing their inherent adhesive properties. Adhesives and additives can be applied during the manufacturing process. Fiberboard has advantages such as uniform material, small difference in longitudinal and transverse strength, and resistance to cracking, making it widely applicable.

[0003] For example, the announcement number CN212903034U (titled "Detection Device for Fiberglass Board Processing") includes a housing. A threaded sleeve is fixedly connected to the top wall of the inner cavity of the housing. A screw rod penetrating the housing is threadedly connected to the inner wall of the threaded sleeve. A suction cup located below the threaded sleeve is movably connected to the bottom end of the screw rod. A throttle is fixedly connected to the top end of the screw rod. A circular level is fixedly connected to the top of the housing to the right of the screw rod. A ring block is movably connected to the outer side of the housing. A connecting rod is fixedly connected to the outer side of the ring block. A movable rod extending to the right side of the connecting rod is movably connected inside the connecting rod. The top of the movable rod has evenly distributed limiting grooves. The right end of the movable rod is fixedly connected to... The device includes a connecting block with a dial indicator fixedly connected to its front side. An end cap is fixedly connected to the top of the connecting rod, and a spring plate is fixedly connected to the inner wall of the end cap. A locking block extending into two adjacent limiting grooves is movably connected to the bottom of the spring plate. A pull rod passing through the spring plate and end cap is fixedly connected to the top of the locking block. The bottom of the outer casing is open, and a clearance hole located outside the screw is opened at the top of the outer casing. A mounting groove is opened at the top of the suction cup, and a first bearing sleeved on the outside of the screw is fixedly connected inside the mounting groove. A second bearing sleeved on the outside of the outer casing is fixedly connected to the inner wall of the ring block. The right side of the connecting rod is open.

[0004] The aforementioned testing device measures the flatness of fiberboard using various measuring instruments, which is cumbersome to operate and inconvenient for testing fiberboard after bending. Therefore, we provide a bending testing device and method for fiberboard processing. Summary of the Invention

[0005] The purpose of this invention is to provide a bending detection device and method for fiberboard processing, so as to solve the problem mentioned in the background art that the existing detection devices for testing fiberboard require multiple measuring instruments to measure the flatness of the board, which is cumbersome and makes it inconvenient to test the fiberboard after bending.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a bending detection device for fiberboard processing, comprising a bearing platform, a detection frame provided on the rear end face of the bearing platform, a positioning seat provided on the upper end of the bearing platform, a top plate provided on the upper end of the positioning seat, and the top plate and the positioning seat being integrally formed.

[0007] Also includes:

[0008] An embedded groove is provided at the upper end of the top plate. The embedded groove is integrally formed with the top plate, and an electromagnet suction plate is provided inside the embedded groove. The electromagnet suction plate is glued to the embedded groove. A positioning block is provided at the upper end of the electromagnet suction plate. The positioning block is fixed to the electromagnet suction plate with nail-free adhesive. A movable support plate is provided at one end of the positioning block.

[0009] A guide groove is provided on one side of the positioning seat. The guide groove is integrally formed with the bearing platform. A movable platform is provided above the guide groove. A guide slider is provided at the bottom of the movable platform. The guide slider is integrally formed with the movable platform. An inner roller is provided in the groove inside the guide groove.

[0010] A reference block is set at the upper end of the movable platform. The reference block and the movable platform are integrally formed. A support plate is set at the rear end of the reference block. The support plate is integrally formed with the movable platform. A guide screw hole is set inside the support plate. The guide screw hole is integrally formed with the support plate.

[0011] A flat testing platform is set inside the testing frame. The top of the flat testing platform is equipped with a top support and a placement seat. The top support and the placement seat are integrally formed. A telescopic hydraulic cylinder is set at the top of the top support. A pressure plate is set on the piston rod of the telescopic hydraulic cylinder. The pressure plate is fixedly connected to the piston rod of the telescopic hydraulic cylinder by screws. The size of the pressure plate is equal to the size of the placement seat.

[0012] A front flip cover is provided on the front end face of the detection frame. There are two front flip covers, which are movably connected to the detection frame by hinges. An illumination lamp is provided on the inner wall of the front flip cover.

[0013] Preferably, a distribution box is provided on the front end face of the positioning seat, a power supply switch is provided on one side of the distribution box, the output end of the distribution box is electrically connected to the input end of the power supply switch, and the output end of the power supply switch is electrically connected to the input end of the electromagnet suction plate.

[0014] Preferably, the outer walls of the positioning block and the movable support plate are provided with connecting grooves. The two connecting grooves are integrally formed with the positioning block and the movable support plate, respectively. Hinges are installed inside the two connecting grooves, and the movable support plate is movably connected to the positioning block through the hinges.

[0015] Preferably, a curtain is provided on the inner wall of the rear end of the detection frame, and a fabric end plate is provided at both ends of the curtain. The fabric end plate is integrally formed with the curtain, and both fabric end plates are fixedly connected to the detection frame by screws.

[0016] Preferably, a backrest plate is provided on the rear end face of the guide slider, and the backrest plate is integrally formed with the guide slider.

[0017] Preferably, an electric push rod is provided inside the guide groove, and a push rod controller is provided on the front end face of the bearing platform. The output end of the push rod controller is connected to the input end of the electric push rod.

[0018] Preferably, an inner roller is provided in the inner groove of the guide slider, and a connecting shaft is provided on both outer walls of the inner roller. The connecting shaft is integrally formed with the inner roller, and the connecting shaft is movably connected to the guide slider through a bearing.

[0019] Preferably, a top screw is provided inside the guide screw hole, the top screw is movably connected to the mounting plate through the guide screw hole, and a clamping block is provided at one end of the top screw, the clamping block and the top screw are integrally formed.

[0020] Preferably, one end of the movable support plate is provided with a handle, and the handle is integrally formed with the movable support plate.

[0021] Preferably, the detection method of the bending detection device for fiberboard processing includes the following steps:

[0022] Step 1: Place the bent fiberboard on the upper part of the movable table and the top plate, and position the bent corner of the fiberboard on the top plate. Then, adjust the angle between the movable support plate and the positioning block by using the hinge to make the angle equal to the angle required for the bending process. Press the power switch to power the electromagnet plate. After the electromagnet plate is powered, it will generate magnetic force to attract and fix the adjustable movable support plate.

[0023] Step 2: Adjust the extension and retraction of the electric push rod by operating the push rod controller, thereby pushing the movable table to move horizontally on the guide groove to meet the length requirements of the fiberboard placement. During the horizontal movement, the inner roller rolls inside the guide groove.

[0024] Step 3: Next, place the fiberboard horizontally on the positioning block and the reference block. Then, rotate the top screw to drive the extension and retraction of the clamping block, thereby clamping the placed fiberboard. After processing, compare whether the bent part can contact and match the angle formed between the movable support plate and the positioning block. If they match, the fiberboard bending process is qualified.

[0025] Step 4: When it is necessary to check whether the fiberboard is flat and not bent, open the two front flip covers, place the fiberboard to be tested on the upper end of the placement seat, and then use the telescopic hydraulic cylinder to drive the pressing plate to move down and contact the upper surface of the fiberboard to be tested.

[0026] Step 5: Close the two front flip covers to make the detection frame light-proof and sealed, and then turn on the two lights to illuminate the placement base, pressing plate and fiberboard to be tested.

[0027] Step Six: Observe whether there are light spots on the shadows formed by the placement of the base, the pressing plate, and the fiberboard to be tested on the screen. If there are light spots, it means that the fiberboard is not flat and has a small bend. Otherwise, it means that the fiberboard is flat and meets the requirements.

[0028] Compared with the prior art, the beneficial effects of the present invention are:

[0029] 1. This invention involves placing the fiberboard to be tested on the upper end of a placement seat, then using a telescopic hydraulic cylinder to move and press down a pressing plate, which then contacts and connects with the upper surface of the fiberboard. Two lights are then turned on to illuminate the placement seat, pressing plate, and fiberboard. The presence of light spots on the shadows cast by these elements on a screen indicates that the fiberboard is uneven and has minor bends; conversely, the absence of light spots indicates that the fiberboard is flat and meets the requirements. The entire process requires no contact with measuring instruments, making it simple to operate. This overcomes the problem of existing testing devices that require multiple measuring instruments to measure the flatness of the fiberboard, which is cumbersome and makes testing bent fiberboard inconvenient.

[0030] 2. By placing the fiberboard horizontally on the positioning block and the reference block, and then rotating the top screw to drive the extension and retraction of the clamping block, the placed fiberboard is clamped. After processing, compare whether the bent part can contact and match the angle formed between the movable support plate and the positioning block. If they match, the fiberboard bending process is qualified. Adjust the angle formed between the movable support plate and the positioning block through the movable connection of the hinge so that the angle formed is equal to the angle required for bending process, so as to achieve the purpose of detecting fiberboards with different bending angles. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of the bending detection device and detection method for PVC board processing according to the present invention;

[0032] Figure 2 This is a schematic diagram of the internal structure of the detection frame of the present invention;

[0033] Figure 3 This is a schematic diagram of the connection structure between the movable support plate and the positioning block of the present invention;

[0034] Figure 4 This is a schematic diagram of the internal structure of the guide groove of the present invention;

[0035] Figure 5 This is a schematic diagram of the connection structure between the electric push rod and the guide slider of the present invention;

[0036] In the diagram: 1. Supporting platform; 2. Testing frame; 3. Positioning seat; 4. Top plate; 5. Embedded groove; 6. Electromagnetic suction plate; 7. Positioning block; 8. Distribution box; 9. Power switch; 10. Guide groove; 11. Movable table; 12. Guide slider; 13. Reference block; 14. Erection plate; 15. Guide screw hole; 16. Top screw; 17. Clamping block; 18. Front flip cover; 19. Lighting lamp; 20. Curtain; 21. Cloth end plate; 22. Flat testing table; 23. Top bracket; 24. Placement seat; 25. Pressing plate; 26. Telescopic hydraulic cylinder; 27. Movable support plate; 28. Connecting groove; 29. ​​Hinge; 30. Handle lever; 31. Internal roller; 32. Connecting shaft; 33. Backrest plate; 34. Electric push rod; 35. Push rod controller. Detailed Implementation

[0037] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0038] Please see Figure 1-5 An embodiment of the present invention provides a bending detection device for fiberboard processing, comprising a bearing platform 1, a detection frame 2 provided on the rear end face of the bearing platform 1, a positioning seat 3 provided on the upper end of the bearing platform 1, a top seat plate 4 provided on the upper end of the positioning seat 3, and the top seat plate 4 and the positioning seat 3 being integrally formed.

[0039] Also includes:

[0040] An embedded groove 5 is located at the upper end of the top plate 4. The embedded groove 5 and the top plate 4 are integrally formed. An electromagnet suction plate 6 is installed inside the embedded groove 5. The electromagnet suction plate 6 is glued to the embedded groove 5. A positioning block 7 is installed at the upper end of the electromagnet suction plate 6. The positioning block 7 is fixed to the electromagnet suction plate 6 with nail-free adhesive. A movable support plate 27 is installed at one end of the positioning block 7.

[0041] The guide groove 10 is located on one side of the positioning seat 3. The guide groove 10 is integrally formed with the bearing platform 1. A movable platform 11 is provided above the guide groove 10. A guide slider 12 is provided at the bottom of the movable platform 11. The guide slider 12 is integrally formed with the movable platform 11. An inner roller 31 is provided in the inner groove of the guide groove 10.

[0042] A reference block 13 is set at the upper end of the movable platform 11. The reference block 13 and the movable platform 11 are integrally formed. A support plate 14 is set at the rear end of the reference block 13. The support plate 14 is integrally formed with the movable platform 11. A guide screw hole 15 is set inside the support plate 14. The guide screw hole 15 and the support plate 14 are integrally formed.

[0043] A leveling test table 22 is set inside the test frame 2. The upper end of the leveling test table 22 is provided with a top support 23 and a placement seat 24. The top support 23 and the placement seat 24 are integrally formed. The upper end of the top support 23 is provided with a telescopic hydraulic cylinder 26. A pressing plate 25 is provided on the piston rod of the telescopic hydraulic cylinder 26. The pressing plate 25 is fixedly connected to the piston rod of the telescopic hydraulic cylinder 26 by screws. The size of the pressing plate 25 is equal to the size of the placement seat 24.

[0044] A front flip cover 18 is set on the front end face of the detection frame 2. There are two front flip covers 18, and the two front flip covers 18 are movably connected to the detection frame 2 through hinges. An illumination lamp 19 is set on the inner wall of the front flip cover 18.

[0045] Please see Figure 1 A distribution box 8 is provided on the front end face of the positioning base 3. A power supply switch 9 is provided on one side of the distribution box 8. The output end of the distribution box 8 is electrically connected to the input end of the power supply switch 9. The output end of the power supply switch 9 is electrically connected to the input end of the electromagnet suction plate 6. The distribution box 8 provided on the front end face of the positioning base 3 serves to supply power to the electromagnet suction plate 6.

[0046] Please see Figure 3 Both the positioning block 7 and the movable support plate 27 have connecting grooves 28 on their outer walls. The two connecting grooves 28 are integrally formed with the positioning block 7 and the movable support plate 27, respectively. Hinges 29 are installed inside the two connecting grooves 28. The movable support plate 27 is movably connected to the positioning block 7 through the hinges 29. The connecting grooves 28 on the outer walls of the positioning block 7 and the movable support plate 27 serve to facilitate the installation and connection of the hinges 29.

[0047] Please see Figure 2 A screen 20 is provided on the inner rear wall of the detection frame 2. Both ends of the screen 20 are provided with a fabric end plate 21. The fabric end plate 21 and the screen 20 are integrally formed. Both fabric end plates 21 are fixedly connected to the detection frame 2 by screws. The screen 20 provided on the inner rear wall of the detection frame 2 serves to clearly display the shadow.

[0048] Please see Figure 4A backrest plate 33 is provided on the rear end face of the guide slider 12. The backrest plate 33 is integrally formed with the guide slider 12. The backrest plate 33 on the rear end face of the guide slider 12 serves to facilitate the fixed connection with the piston rod of the electric push rod 34 by screws.

[0049] Please see Figure 1 and Figure 5 An electric push rod 34 is installed inside the guide groove 10, and a push rod controller 35 is installed on the front end face of the bearing platform 1. The output end of the push rod controller 35 is connected to the input end of the electric push rod 34. The electric push rod 34 installed inside the guide groove 10 plays the role of assisting the movement adjustment of the movable table 11.

[0050] Please see Figure 4 An inner roller 31 is provided in the inner groove of the guide slider 12. A connecting shaft 32 is provided on both outer walls of the inner roller 31. The connecting shaft 32 and the inner roller 31 are integrally formed. The connecting shaft 32 is movably connected to the guide slider 12 through a bearing. The inner roller 31 provided in the inner groove of the guide slider 12 plays the role of rolling connection with the guide groove 10.

[0051] Please see Figure 1 The guide screw hole 15 is provided with a top screw 16. The top screw 16 is movably connected to the mounting plate 14 through the guide screw hole 15. One end of the top screw 16 is provided with a clamping block 17. The clamping block 17 and the top screw 16 are integrally formed. The top screw 16 provided inside the guide screw hole 15 plays the role of positioning clamp.

[0052] Please see Figure 3 A handle 30 is provided at one end of the movable support plate 27. The handle 30 is integrally formed with the movable support plate 27. The handle 30 at one end of the movable support plate 27 serves to facilitate gripping and adjusting the movable support plate 27.

[0053] Please see Figure 1-5 A method for detecting bending defects in fiberboard processing includes the following steps:

[0054] Step 1: Place the fiberboard that has been bent onto the upper part of the movable table 11 and the top plate 4, and position the bent corner of the fiberboard on the top plate 4. Then, adjust the angle between the movable support plate 27 and the positioning block 7 by using the hinge 29 to make the angle equal to the angle required for the bending process. Press the power switch 9 to power the distribution box 8 to the electromagnet suction plate 6. After the electromagnet suction plate 6 is powered, it will generate magnetic force to attract and fix the movable support plate 27.

[0055] Step 2: Adjust the telescopic movement of the electric push rod 34 by operating the push rod controller 35, thereby pushing the movable table 11 to move horizontally on the guide groove 10 to meet the length requirements of the fiberboard placement. During the horizontal movement, the inner roller 31 rolls inside the guide groove 10.

[0056] Step 3: Next, place the fiberboard horizontally on the positioning block 7 and the reference block 13. Then, by rotating the top screw 16, the clamping block 17 is moved to extend and retract, thereby clamping the placed fiberboard. After processing, compare whether the bent part can contact and match the angle formed between the movable support plate 27 and the positioning block 7. If they match, the fiberboard bending process is qualified.

[0057] Step 4: When it is necessary to check whether the fiberboard is flat and not bent, open the two front flip covers 18, place the fiberboard to be tested on the upper end of the placement seat 24, and then use the telescopic hydraulic cylinder 26 to drive the pressing plate 25 to move down and contact the upper surface of the fiberboard to be tested.

[0058] Step 5: Close the two front flip covers 18 to make the detection frame 2 light-proof and sealed, and then turn on the two lights 19 to illuminate the placement seat 24, the pressing plate 25 and the fiberboard to be tested.

[0059] Step Six: Observe whether there are light spots on the shadow formed by the seat 24, the pressing plate 25 and the fiberboard to be tested on the screen 20. If there are light spots, it means that the fiberboard is not flat and has a small bend. Otherwise, it means that the fiberboard is flat and qualified.

[0060] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A bending detection device for fiberboard processing, comprising a bearing platform (1), a detection frame (2) provided on the rear end face of the bearing platform (1), a positioning seat (3) provided on the upper end of the bearing platform (1), a top seat plate (4) provided on the upper end of the positioning seat (3), and the top seat plate (4) and the positioning seat (3) being integrally formed; Its features are: Also includes: An embedded groove (5) is located at the upper end of the top plate (4). The embedded groove (5) and the top plate (4) are integrally formed. An electromagnet suction plate (6) is provided inside the embedded groove (5). The electromagnet suction plate (6) is glued to the embedded groove (5). A positioning block (7) is provided at the upper end of the electromagnet suction plate (6). The positioning block (7) is fixedly connected to the electromagnet suction plate (6) by nail-free adhesive. A movable support plate (27) is provided at one end of the positioning block (7). A guide groove (10) is provided on one side of the positioning seat (3). The guide groove (10) is integrally formed with the bearing platform (1). A movable platform (11) is provided above the guide groove (10). A guide slider (12) is provided at the bottom of the movable platform (11). The guide slider (12) is integrally formed with the movable platform (11). An inner roller (31) is provided in the inner groove of the guide groove (10). A reference block (13) is provided at the upper end of the movable platform (11). The reference block (13) and the movable platform (11) are integrally formed. A support plate (14) is provided at the rear end of the reference block (13). The support plate (14) and the movable platform (11) are integrally formed. A guide screw hole (15) is provided inside the support plate (14). The guide screw hole (15) and the support plate (14) are integrally formed. A flat testing platform (22) is set inside the testing frame (2). The upper end of the flat testing platform (22) is provided with a top bracket (23) and a placement seat (24). The top bracket (23) and the placement seat (24) are integrally formed. The upper end of the top bracket (23) is provided with a telescopic hydraulic cylinder (26). A pressing plate (25) is provided on the piston rod of the telescopic hydraulic cylinder (26). The pressing plate (25) is fixedly connected to the piston rod of the telescopic hydraulic cylinder (26) by screws. The size of the pressing plate (25) is equal to the size of the placement seat (24). A front flip cover (18) is provided on the front end face of the detection frame (2). There are two front flip covers (18). The two front flip covers (18) are connected to the detection frame (2) by hinges. A lighting lamp (19) is provided on the inner wall of the front flip cover (18). The outer walls of the positioning block (7) and the movable support plate (27) are provided with connecting grooves (28). The two connecting grooves (28) are integrally formed with the positioning block (7) and the movable support plate (27) respectively. Hinges (29) are installed inside the two connecting grooves (28). The movable support plate (27) is movably connected to the positioning block (7) through the hinges (29). The guide screw hole (15) is provided with a top screw (16), which is movably connected to the mounting plate (14) through the guide screw hole (15). One end of the top screw (16) is provided with a clamping block (17), which is integrally formed with the top screw (16).

2. The bending detection device for fiberboard processing according to claim 1, characterized in that: A distribution box (8) is provided on the front end face of the positioning seat (3). A power supply switch (9) is provided on one side of the distribution box (8). The output end of the distribution box (8) is electrically connected to the input end of the power supply switch (9). The output end of the power supply switch (9) is electrically connected to the input end of the electromagnet suction plate (6).

3. The bending detection device for fiberboard processing according to claim 2, characterized in that: A curtain (20) is provided on the inner wall of the rear end of the detection frame (2). Both ends of the curtain (20) are provided with fabric end plates (21). The fabric end plates (21) and the curtain (20) are integrally formed. Both fabric end plates (21) are fixedly connected to the detection frame (2) by screws.

4. The bending detection device for fiberboard processing according to claim 3, characterized in that: A backrest plate (33) is provided on the rear end face of the guide slider (12), and the backrest plate (33) and the guide slider (12) are integrally formed.

5. The bending detection device for fiberboard processing according to claim 4, characterized in that: An electric push rod (34) is provided inside the guide groove (10), and a push rod controller (35) is provided on the front end face of the bearing platform (1). The output end of the push rod controller (35) is connected to the input end of the electric push rod (34).

6. The bending detection device for fiberboard processing according to claim 5, characterized in that: An inner roller (31) is provided in the inner groove of the guide slider (12). A connecting shaft (32) is provided on both outer walls of the inner roller (31). The connecting shaft (32) and the inner roller (31) are integrally formed. The connecting shaft (32) is movably connected to the guide slider (12) through a bearing.

7. The bending detection device for fiberboard processing according to claim 1, characterized in that: One end of the movable support plate (27) is provided with a handle (30), and the handle (30) and the movable support plate (27) are integrally formed.

8. A detection method for a bending detection device for fiberboard processing as described in claim 7, characterized in that: Includes the following steps: Step 1: Place the fiberboard that has been bent into the upper part of the movable table (11) and the top plate (4), and place the bent corner part in the position of the top plate (4). Then, adjust the angle formed between the movable support plate (27) and the positioning block (7) by the movable connection of the hinge (29) so that the angle formed is equal to the angle required for bending. Press the power switch (9) to make the distribution box (8) supply power to the electromagnet suction plate (6). After the electromagnet suction plate (6) is powered, it generates magnetic force to attract and fix the movable support plate (27) that has been adjusted. Step 2: Adjust the telescopic movement of the electric push rod (34) by operating the push rod controller (35), thereby pushing the movable table (11) to move horizontally on the guide groove (10) to meet the requirements of the fiberboard placement length. During the horizontal movement, the inner roller (31) rolls inside the guide groove (10). Step 3: Next, place the fiberboard horizontally on the positioning block (7) and the reference block (13). Then, by rotating the top screw (16), the clamping block (17) is moved to extend and retract, thereby clamping the placed fiberboard. After processing, compare whether the bent part can contact and match the angle formed between the movable support plate (27) and the positioning block (7). If they match, the fiberboard bending process is qualified. Step 4: When it is necessary to check whether the fiberboard is flat and not bent, open the two front flip covers (18), place the fiberboard to be tested on the upper end of the placement seat (24), and then drive the pressing plate (25) to move down through the telescopic hydraulic cylinder (26) and contact the upper surface of the fiberboard to be tested. Step 5: Close the two front flip covers (18) to make the detection frame (2) light-proof, and then turn on the two lights (19) to irradiate the placement seat (24), the pressing plate (25) and the fiberboard to be tested; Step 6: Observe whether there are light spots on the shadow formed by the seat (24), pressing plate (25) and the fiberboard to be tested on the screen (20). If there are light spots, it means that the fiberboard is not flat and has a small bend. Otherwise, it means that the fiberboard is flat and qualified.

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