A plate centering and conveying device and method

Abstract

The application provides a plate centering conveying device and method, and belongs to the technical field of plate conveying. The device comprises a rack, which is sequentially divided into a centering part, a first cleaning part, a turnover part and a second cleaning part along the advancing direction. The rack of the centering part, the first cleaning part and the second cleaning part is provided with conveying rollers. The centering part is provided with a centering assembly, which can follow the plate and center the plate. The application drives the clamping blocks to clamp the plate in opposite directions through telescopic cylinders, then realizes the movement following the plate through clamping plates, and can be quickly reset through a first motor. The stability of centering is ensured, the plate is stably centered in a longer distance, the friction received by the plate is reduced compared with ordinary clamping centering, and the surface of the plate will not be scratched. Even if the plate is provided with part grooves or other irregular structures on both sides, the plate will not be stuck with the centering assembly, and the device has good practicability.

Description

Technical Field

[0001] This invention belongs to the field of sheet material conveying technology, specifically relating to a sheet material centering and conveying device and method. Background Technology

[0002] In the modern panel processing industry, panels serve as a fundamental material for many industries, including furniture manufacturing. The quality and efficiency of panel processing directly impact the performance and cost of the final product. Panel materials encompass various types, including blockboard, plywood, and decorative panels, and are widely used in the production of furniture, doors, and windows. In the actual processing flow, panels undergo multiple steps, including dust removal, hot pressing, paper scraping and edge trimming, drying, and panel inspection. The precise coordination between these steps places higher demands on the conveyor systems.

[0003] Traditional sheet metal conveying devices primarily function to transport sheet metal, but they have significant limitations in functionality. During sheet metal conveying, centering and positioning are crucial for ensuring the accuracy and quality of subsequent processing. Existing centering devices, such as the sheet metal centering conveying mechanism disclosed in CN 106743407 A, while achieving sheet metal centering, still have the following shortcomings:

[0004] 1. When centering, the device needs to use rotating rollers to reduce friction between the plate and the centering mechanism. However, there is a gap between adjacent rollers. When centering plates with uneven sides, grooves, or protrusions, the grooves are easy to get stuck between the two rollers, or the four corners of the plate are stuck between the two rollers due to the small size of the plate, causing inconvenience to production.

[0005] 2. After the boards are aligned, they need to be laminated. The lamination process requires cleaning both sides of the boards first. Summary of the Invention

[0006] To address the problems existing in the prior art, a plate alignment and conveying device and method are proposed.

[0007] The technical solution to the technical problem solved by the present invention is as follows: On the one hand, a plate centering and conveying device is proposed, including a frame, which is divided into a centering section, a first cleaning section, a flipping section and a second cleaning section in sequence along the forward direction; wherein conveying rollers are provided on the frame of the centering section, the first cleaning section and the second cleaning section;

[0008] A centering component is installed in the center section, which can follow and center the sheet material; the conveyor rollers can transport the sheet material from the centering section to the first cleaning section.

[0009] The first cleaning section includes a fixed cover, which is fitted over the first cleaning section. A cleaning brush is installed inside the fixed cover. The cleaning brush can clean the sheet material being conveyed below. The conveying roller can convey the sheet material from the first cleaning section to the turning section.

[0010] A flipping component is provided on the flipping section, which can flip the plate and place it on the conveyor roller of the second cleaning section;

[0011] The second cleaning section includes a fixing cover, which is fitted over the second cleaning section. A cleaning brush is installed inside the fixing cover, which can clean the flipped-over board below.

[0012] Preferably, the centering assembly includes two support plates, which are fixed to both sides of the frame. A connecting rod is rotatably connected to the support plates. The connecting rod is L-shaped, with a telescopic cylinder connected to the bottom of the connecting rod and a first connecting rod rotatably connected to the top. The other end of the first connecting rod is rotatably connected to a clamping block. The clamping blocks on the two support plates can clamp the plate in opposite directions. A vertical guide rod is also connected to the bottom of the frame. A guide block is sleeved on the guide rod and can slide along the guide rod. A second connecting rod is rotatably connected to one end of each side of the guide rod. The other end of the second connecting rod is connected to one end of a positioning rod, and the other end of the positioning rod is fixed to the connecting rod.

[0013] Preferably, a through groove is opened in the middle of the clamping block along the conveying direction, and a clamping plate is slidably connected in the through groove. Limiting grooves are opened on the top and bottom plates of the through groove, and limiting blocks are connected to the top and bottom of the clamping plate, and the limiting blocks can slide in the limiting grooves. A rack is also connected to the top of the clamping plate, and a gear is rotatably connected to the clamping block. The gear is driven to rotate by the first motor on the clamping block.

[0014] Preferably, the frame is also provided with a vertical pole, a slider is connected to the vertical pole, and a groove is opened on the corresponding clamping block, so that the slider can slide in the groove.

[0015] Preferably, the flipping assembly includes two flipping shafts rotatably connected to the frame, wherein the middle of one flipping shaft is connected to a first flipping rod, and the middle of the other flipping shaft is connected to a second flipping rod. The first flipping rod and the second flipping rod are facing away from each other and are offset. A first slot is formed at the top of the first flipping rod, which can block the sheet material conveyed from the cleaning section. A second slot is formed at the top of the second flipping rod, which is facing away from the first slot and can catch the sheet material that disengages from the first slot when the first flipping rod rotates to its highest point. The first flipping rod and the second flipping rod are driven to rotate by a drive assembly.

[0016] Preferably, the drive assembly includes a rotating shaft with a first sprocket connected to its center and a drive disc connected to each end of the shaft. A protrusion is connected to each of the two drive discs, and the two protrusions are arranged facing away from each other. A fixed plate is connected to the bottom of the frame, and a fixed seat is connected to the fixed plate. The rotating shaft is rotatably connected to the fixed seat, and the fixed seat is positioned between the first sprocket and the drive disc. A drive shaft is also connected to the bottom of the frame, and the drive shaft is driven to rotate by a second motor on the frame. A second sprocket is connected to the drive shaft, and the first sprocket and the second sprocket are connected via a transmission chain. A first drive rod and a second drive rod are rotatably connected to the two protrusions, respectively. The first drive rod is rotatably connected to a first tilting rod, and the second drive rod is rotatably connected to a second tilting rod.

[0017] Preferably, the first and second flip bars are also provided with vertical reinforcing bars to prevent the panels from slipping.

[0018] Preferably, the ends of the conveyor rollers are connected to a first drive wheel and a second drive wheel, and the conveyor rollers are connected to each other by a drive belt. The drive belt connects the first drive wheels of the two conveyor rollers respectively, and the second drive wheel on the next conveyor roller is then connected to the second drive wheel on the conveyor roller by a drive belt to achieve transmission.

[0019] On the other hand, a method for cleaning a sheet metal using a sheet metal centering and conveying device is proposed, comprising the following steps:

[0020] S1. Conveying; conveying the manufactured sheet metal via conveyor rollers;

[0021] S2. Centering; The sheet metal is conveyed to the centering section by the conveyor rollers. The telescopic cylinder is activated, and the telescopic cylinder drives the clamping blocks to clamp the sheet metal in opposite directions. The sheet metal is connected to the clamping plates on the clamping blocks. The clamping plates slide with the sheet metal while ensuring that the sheet metal is centered and conveyed on the conveyor rollers.

[0022] S3. First cleaning: The conveyor rollers transport the aligned sheet material to the first cleaning section, and the cleaning brushes set at the top clean the front side of the sheet material.

[0023] S4. Flipping the plate: The conveyor rollers transport the plate to the first flipping rod of the flipping section. The first flipping rod and the second flipping rod rotate synchronously in opposite directions to move the plate from the first flipping rod to the second flipping rod, thus flipping the plate.

[0024] S5. Secondary cleaning: The end of the plate on the second flip bar enters the second cleaning section under the drive of the conveyor roller of the second cleaning section, and the back of the plate is cleaned by the cleaning brush;

[0025] S6. Coating; applying a film to the cleaned board material.

[0026] Compared with existing technologies, the above technical solution has the following advantages or beneficial effects:

[0027] 1. This invention uses a telescopic cylinder to drive the clamping blocks to clamp the plate in opposite directions, and then uses a clamping plate to follow the movement of the plate. It can also be quickly reset by a first motor, which not only ensures the stability of the centering and allows the plate to be stably centered over a longer distance, but also reduces the friction force received by the plate compared to ordinary clamping and centering, so that the surface of the plate will not be scratched. Furthermore, even if there are grooves or other irregular structures on both sides of the plate, the plate will not get stuck with the centering components, which is very practical.

[0028] 2. This invention uses a sprocket to drive a drive disc, which in turn drives the first flipping rod and the second flipping rod to rotate in opposite directions. This allows the sheet material to first be moved from the first cleaning section to the first flipping rod, then rotate in opposite directions to flip over, and finally fall onto the conveyor roller of the second cleaning section after being flipped over by the second flipping rod. This completes the double-sided cleaning of the sheet material and makes sufficient preparations for the sheet material to be coated. Attached Figure Description

[0029] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0030] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 .

[0031] Figure 2 yes Figure 1 Schematic diagram of the structure at point A in the middle.

[0032] Figure 3 This is a schematic diagram of the structure of the present invention. Figure 2 .

[0033] Figure 4 yes Figure 3 Enlarged view of section B in the middle.

[0034] Figure 5 This is a schematic diagram of the structure of the present invention viewed from below.

[0035] Figure 6 yes Figure 5 Enlarged view of point C.

[0036] Figure 7 yes Figure 5 Enlarged view of point D in the middle.

[0037] Figure 8 This is a schematic diagram of the structure at the connection of the conveyor rollers.

[0038] Explanation of reference numerals in the attached figures:

[0039] 1. Frame; 11. Centering section; 12. First cleaning section; 13. Tilting section; 14. Second cleaning section; 2. Centering assembly; 21. Support plate; 22. Connecting rod; 23. Telescopic cylinder; 24. First connecting rod; 25. Clamping block; 26. Guide rod; 27. Guide block; 28. Second connecting rod; 29. ​​Positioning rod; 210. Through groove; 211. Limiting groove; 212. Clamping plate; 213. Limiting block; 214. Rack; 215. Gear; 216. First motor; 217. Upright pole; 218. Slider; 219. Slide groove; 3. 31. Fixed cover; 4. Cleaning brush; 5. Conveying roller; 6. First drive wheel; 7. Second drive wheel; 8. Drive belt; 9. Tilting assembly; 10. Tilting shaft; 11. First tilting rod; 12. First slot; 13. Second tilting rod; 14. Second slot; 15. Reinforcing rod; 16. Drive assembly; 17. Rotating shaft; 18. First sprocket; 19. Drive disc; 20. Protrusion; 21. Fixed plate; 22. Fixed seat; 33. Drive shaft; 44. Second drive rod; 55. Drive chain; 66. First drive rod; 77. Second drive rod. Detailed Implementation

[0040] To clearly illustrate the technical features of this solution, the invention will be described in detail below through specific embodiments and in conjunction with the accompanying drawings. The following disclosure provides many different embodiments or examples for implementing different structures of the invention. To simplify the disclosure of the invention, components and arrangements of specific examples are described below. Furthermore, reference numerals and / or letters may be repeated in different examples. This repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. It should be noted that the components illustrated in the drawings are not necessarily drawn to scale. Descriptions of well-known components and processing techniques and processes are omitted to avoid unnecessarily limiting the invention. Terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the drawings and are only for the convenience of describing the 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, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0041] Example 1:

[0042] Please see Figures 1-8 This embodiment proposes a board centering and conveying device. This device is mainly used for cleaning and conveying the board before laminating. It includes a frame 1, which is divided into a centering section 11, a first cleaning section 12, a flipping section 13, and a second cleaning section 14 in sequence along the forward direction. Conveying rollers 4 are provided on the frame 1 of the centering section 11, the first cleaning section 12, and the second cleaning section 14.

[0043] A centering component 2 is provided on the centering section 11, which can follow the board and center it; the conveying roller 4 can convey the board from the centering section 11 to the first cleaning section 12.

[0044] The first cleaning section 12 includes a fixed cover 3, which is sleeved on the top of the first cleaning section 12. A cleaning brush 31 is provided inside the fixed cover 3. The cleaning brush 31 can clean the plate conveyed below. The conveying roller 4 can convey the plate from the first cleaning section 12 to the flipping section 13.

[0045] A flipping assembly 5 is provided on the flipping section 13. The flipping assembly 5 can flip the plate and place it on the conveying roller 4 of the second cleaning section 14.

[0046] The second cleaning section 14 includes a fixing cover 3, which is sleeved on the top of the second cleaning section 14. A cleaning brush 31 is provided inside the fixing cover 3, which can clean the flipped-over board below.

[0047] In order to ensure the centered conveying of the board before cleaning and to ensure that the force is even when it is cleaned by the cleaning brush 31, a centering operation needs to be performed before cleaning. At the same time, the centering component 2 can also be set on the conveying roller 4 after cleaning to ensure that it is also centered when it is conveyed to the laminating machine.

[0048] Example 2:

[0049] Please see Figure 1 , Figure 2 and Figure 6The rest is the same as in Embodiment 1, except that: compared to the conventional centering assembly 2, either the conveyor roller 4 needs to stop before centering to reduce wear on the sides of the sheet metal, or the rolling is achieved by rollers. However, there is a large gap between the rollers. If the sheet metal is significantly tilted, or if there are grooves or other structures on both sides of the sheet metal after processing, the sheet metal is prone to getting stuck with the rollers, affecting the conveying and potentially damaging the machine. Therefore, this embodiment proposes a centering assembly 2, including two support plates 21, which are respectively fixed on both sides of the frame 1. A connecting rod 22 is rotatably connected to the support plates 21. 22 is L-shaped. The bottom of the connecting rod 22 is rotatably connected to the telescopic cylinder 23, and the top is rotatably connected to one end of the first connecting rod 24. The other end of the first connecting rod 24 is rotatably connected to the clamping block 25. The clamping blocks 25 on the two support plates 21 can clamp the plates in opposite directions. The bottom of the frame 1 is also connected to a vertical guide rod 26. A guide block 27 is sleeved on the guide rod 26. The guide block 27 can slide along the guide rod 26. The two sides of the guide rod 26 are respectively rotatably connected to one end of a second connecting rod 28. The other end of the second connecting rod 28 is connected to one end of a positioning rod 29. The other end of the positioning rod 29 is fixed on the connecting rod 22.

[0050] In this embodiment, a through groove 210 is formed in the middle of the clamping block 25 along the conveying direction. A clamping plate 212 is laterally slidably connected in the through groove 210. Limiting grooves 211 are formed on the top and bottom plates of the through groove 210. Limiting blocks 213 are connected to the top and bottom of the clamping plate 212, and the limiting blocks 213 can slide in the limiting grooves 211. A rack 214 is also connected to the top of the clamping plate 212. A gear 215 is rotatably connected to the clamping block 25. The gear 215 is driven to rotate by the first motor 216 on the clamping block 25. A vertical rod 217 is also provided on the frame 1. A slider 218 is connected to the vertical rod 217. A sliding groove 219 is formed on the clamping block 25, and the slider 218 can slide in the sliding groove 219.

[0051] Working principle:

[0052] An infrared sensor can be installed at the front of the centering component 2. When the plate passes by, the telescopic cylinder 23 is activated. The telescopic cylinder 23 drives the connecting rod 22 to rotate. The connecting rod 22 drives the clamping block 25 to gradually clamp the plate in the middle. When the plate contacts the clamping plate 212 on the clamping block 25, the telescopic cylinder 23 stops moving. At this time, the clamping plate 212 slides forward under the action of the plate. When it slides to the maximum limit, the telescopic cylinder 23 retracts. At the same time, the first motor 216 drives the gear 215 to rotate and retract the clamping plate 212 into the through groove 210, repeating the next stroke.

[0053] Example 3:

[0054] Please see Figures 3-7This embodiment further optimizes the flipping assembly 5 based on Embodiment 1, including two flipping shafts 51 rotatably connected to the frame 1. One flipping shaft 51 is connected to a first flipping rod 52 at its center, and the other flipping shaft 51 is connected to a second flipping rod 54 at its center. The first flipping rod 52 and the second flipping rod 54 are positioned opposite each other and offset. A first slot 53 is formed at the top of the first flipping rod 52, which can block the sheet material conveyed from the cleaning section. A second slot 55 is formed at the top of the second flipping rod 54, which is positioned opposite to the first slot 53 and can catch the sheet material that disengages from the first slot 53 when the first flipping rod 52 rotates to its highest point. The first flipping rod 52 and the second flipping rod 54 are driven to rotate by a drive assembly 6. A reinforcing rod 56 is also vertically provided on the first flipping rod 52 and the second flipping rod 54 to prevent the sheet material from slipping.

[0055] The drive assembly 6 can be driven by gears 215. While gears 215 can be installed on both shafts 61 and between them, this would obstruct the connection of the transmission belt 43 between the conveyor rollers 4 of the two cleaning sections, necessitating separate drive motors and resulting in waste. Furthermore, due to the small rotation amplitude, the accuracy of gear transmission is difficult to control, and the minimum angle of the first tilting rod 52 and the second tilting rod 54 is also difficult to control. Therefore, the drive assembly 6 proposed in this embodiment includes a shaft 61, with a first sprocket 62 connected to the middle of the shaft 61. A drive disc 63 is connected to each end of the shaft 61, and a protrusion is connected to each of the two drive discs 63. 64. Two protrusions 64 are arranged facing away from each other; a fixed plate 65 is connected to the bottom of the frame 1, and a fixed seat 66 is connected to the fixed plate 65. The rotating shaft 61 is rotatably connected to the fixed seat 66, and the fixed seat 66 is located between the first sprocket 62 and the drive disc 63; a drive shaft 67 is also connected to the bottom of the frame 1, and the drive shaft 67 is driven to rotate by the second motor on the frame 1; a second sprocket 68 is connected to the drive shaft 67, and the first sprocket 62 and the second sprocket 68 are connected by a transmission chain 69; a first drive rod 610 and a second drive rod 611 are rotatably connected to the two protrusions 64 respectively, the first drive rod 610 is rotatably connected to the first flip rod 52, and the second drive rod 611 is rotatably connected to the second flip rod 54.

[0056] When in use, after the board is detected to fall onto the first flip bar 52, the first sprocket 62 is rotated by the second motor and the sprocket drive belt 43. The first sprocket 62 rotates twice to complete one flip of the board. The rotation of the first sprocket 62 drives the drive discs 63 on both sides to rotate, which in turn drives the first drive rod 610 and the second drive rod 611 to rotate, thereby causing the first flip bar 52 and the second flip bar 54 to flip in opposite directions.

[0057] Example 4:

[0058] Please see Figure 8Based on Embodiment 1, this embodiment proposes a transmission method for the conveying roller 4. The end of the conveying roller 4 is connected to the first transmission wheel 41 and the second transmission wheel 42. The conveying rollers 4 are connected to each other by a transmission belt 43. The transmission belt 43 is connected to the first transmission wheel 41 of the two conveying rollers 4 respectively. The second transmission wheel 42 on the next conveying roller 4 is then connected to the second transmission wheel 42 on the conveying roller 4 by the transmission belt 43 to achieve transmission.

[0059] Example 5:

[0060] Please see Figures 1-8 This embodiment proposes a method for cleaning sheet metal using such a sheet metal centering and conveying device, including the following steps:

[0061] S1. Conveying; conveying the manufactured sheet metal through conveyor rollers 4;

[0062] S2. Centering; The plate is conveyed to the centering part 11 by the conveyor roller 4. The telescopic cylinder 23 is activated. The telescopic cylinder 23 drives the clamping block 25 to clamp the plate in opposite directions. The plate is connected to the clamping plate 212 on the clamping block 25. The clamping plate 212 slides with the plate while ensuring that the plate is centered and conveyed on the conveyor roller 4.

[0063] S3. First cleaning; the conveyor roller 4 conveys the aligned plate to the first cleaning section 12, and the cleaning brush 31 set at the top cleans the front of the plate;

[0064] S4. Flip the plate; the conveyor roller 4 conveys the plate to the first flipping rod 52 of the flipping part 13. The first flipping rod 52 and the second flipping rod 54 rotate synchronously in opposite directions to move the plate from the first flipping rod 52 to the second flipping rod 54, thereby flipping the plate.

[0065] S5. Secondary cleaning: The end of the plate on the second flip bar 54 enters the second cleaning section 14 under the drive of the conveying roller 4 of the second cleaning section 14, and the back of the plate is cleaned by the cleaning brush 31.

[0066] S6. Coating; applying a film to the cleaned board material.

[0067] Although the specific embodiments of the invention have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the invention. Based on the technical solutions of the invention, various modifications or variations that can be made by those skilled in the art without creative effort are still within the scope of protection of the invention.

Claims

1. A plate centering and conveying device, characterized by: The utility model relates to a kind of plate cleaning device, including rack (1), rack (1) is sequentially divided into centering portion (11), first cleaning portion (12), turnover portion (13) and second cleaning portion (14) along the direction of advance;Wherein the rack (1) of centering portion (11), first cleaning portion (12) and second cleaning portion (14) is provided with conveying roller (4); Centering assembly (2) is provided on centering portion (11), and centering assembly (2) can be centered with plate and plate is centered;Conveying roller (4) can convey plate from centering portion (11) to first cleaning portion (12); First cleaning portion (12) includes fixed cover (3), fixed cover (3) is set on the top of first cleaning portion (12), cleaning brush (31) is provided in fixed cover (3), cleaning brush (31) can clean the plate conveyed below, conveying roller (4) can convey plate from first cleaning portion (12) to turnover portion (13); Turnover assembly (5) is provided on turnover portion (13), and turnover assembly (5) can overturn plate and put on the conveying roller (4) of second cleaning portion (14); Second cleaning portion (14) includes fixed cover (3), fixed cover (3) is set on the top of second cleaning portion (14), cleaning brush (31) is provided in fixed cover (3), cleaning brush (31) can clean the plate overturned below; Centering assembly (2) includes two support plates (21), support plate (21) is fixed on the both sides of rack (1) respectively, support plate (21) is rotatably connected with connecting rod (22), connecting rod (22) is L-shaped, the bottom of connecting rod (22) is rotatably connected with telescopic cylinder (23), the top is rotatably connected with one end of first connecting rod (24), the other end of first connecting rod (24) is rotatably connected with clamping block (25), the clamping block (25) on two support plates (21) can be opposite to clamp plate;The bottom of rack (1) is also connected with vertical guide rod (26), guide block (27) is sleeved on guide rod (26), guide block (27) can slide along guide rod (26), the both sides of guide rod (26) are rotatably connected with one end of second connecting rod (28) respectively, the other end of second connecting rod (28) is connected with one end of positioning rod (29), the other end of positioning rod (29) is fixed on connecting rod (22); The middle part of clamping block (25) is provided with through slot (210) along the conveying direction, clamping plate (212) is transversely slidably connected in through slot (210), limiting groove (211) is formed in the top plate and the bottom plate of through slot (210), limiting block (213) is connected with the top and the bottom of clamping plate (212) correspondingly, limiting block (213) can slide in limiting groove (211); Clamping plate (212) top is also connected with rack (214), gear (215) is rotatably connected on clamping block (25) correspondingly, gear (215) is driven to rotate by first motor (216) on clamping block (25). The turnover assembly (5) comprises two turnover shafts (51) rotatably connected to the rack (1), a middle part of one of the turnover shafts (51) is connected to a first turnover rod (52), a middle part of the other turnover shaft (51) is connected to a second turnover rod (54), the first turnover rod (52) and the second turnover rod (54) are oppositely and staggeredly arranged; a top part of the first turnover rod (52) is provided with a first clamping groove (53), the first clamping groove (53) can block the board conveyed from the cleaning part; a top part of the second turnover rod (54) is provided with a second clamping groove (55), the second clamping groove (55) is oppositely arranged with the first clamping groove (53), the second clamping groove (55) can receive the board separated from the first clamping groove (53) when the first turnover rod (52) rotates to the highest point; the first turnover rod (52) and the second turnover rod (54) are driven to rotate by the driving assembly (6).

2. A plate centering and conveying device according to claim 1, characterized in that The rack (1) is further provided with a vertical rod (217), the vertical rod (217) is connected with a sliding block (218), a sliding groove (219) is formed on the clamping block (25) in correspondence, and the sliding block (218) can slide in the sliding groove (219).

3. A device for centering and conveying sheet material as defined in claim 1, wherein: The driving assembly (6) comprises a rotating shaft (61), a first sprocket (62) is connected to a middle part of the rotating shaft (61), two driving discs (63) are respectively connected to two ends of the rotating shaft (61), two protrusions (64) are respectively connected to the two driving discs (63), and the two protrusions (64) are oppositely arranged; a fixed plate (65) is connected to a bottom part of the rack (1), a fixed seat (66) is connected to the fixed plate (65), the rotating shaft (61) is rotatably connected to the fixed seat (66), and the fixed seat (66) is arranged between the first sprocket (62) and the driving disc (63); a driving shaft (67) is further connected to the bottom part of the rack (1), the driving shaft (67) is driven to rotate by a second motor on the rack (1); a second sprocket (68) is connected to the driving shaft (67), the first sprocket (62) and the second sprocket (68) are connected by a transmission chain (69); a first driving rod (610) and a second driving rod (611) are rotatably connected to the two protrusions (64) respectively, the first driving rod (610) is rotatably connected to the first turnover rod (52), and the second driving rod (611) is rotatably connected to the second turnover rod (54).

4. A device for centering and conveying a sheet according to claim 1 or 3, characterized in that: A reinforcing rod (56) is further vertically arranged on the first turnover rod (52) and the second turnover rod (54) to prevent the board from falling off.

5. A device for centering and conveying a sheet material as defined in claim 1, wherein: The conveying roller (4) is connected with a first transmission wheel (41) and a second transmission wheel (42), the conveying roller (4) is connected by a transmission belt (43), the transmission belt (43) is connected with the first transmission wheel (41) of the conveying roller (4), and the second transmission wheel (42) on the next conveying roller (4) is connected with the second transmission wheel (42) on the conveying roller (4) by the transmission belt (43) to realize transmission.

6. A method of cleaning a sheet material using the sheet material centering conveyor of any one of claims 1-5, characterized in that The method comprises the following steps: S1. conveying; conveying the manufactured board by the conveying roller (4); S2. Centering; the plate is conveyed to the centering part (11) by the conveying roller (4), the telescopic cylinder (23) is started, the telescopic cylinder (23) drives the clamping block (25) to clamp the plate, the plate is connected with the clamping plate (212) on the clamping block (25), the clamping plate (212) slides with the plate while ensuring that the plate is centered and conveyed on the conveying roller (4); S3. First cleaning; the plate after centering is conveyed to the first cleaning part (12) by the conveying roller (4), and the front surface of the plate is cleaned by the cleaning brush (31) arranged on the upper part; S4. Turn over the plate; the conveying roller (4) conveys the plate to the first turnover rod (52) of the turnover part (13), the first turnover rod (52) and the second turnover rod (54) are synchronously rotated to realize the movement of the plate from the first turnover rod (52) to the second turnover rod (54), and the turnover of the plate is realized; S5. Second cleaning; the end of the plate on the second turnover rod (54) enters the second cleaning part (14) under the driving of the conveying roller (4) of the second cleaning part (14), and the back surface of the plate is cleaned by the cleaning brush (31); S6. Coating; the cleaned plate is coated.

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