A woodworking grinding device

Abstract

The present invention relates to the technical field of woodworking grinding, and particularly relates to a woodworking grinding device, which includes a base. Three legs are correspondingly fixed to the top of the backing plate. A grinding angle component for grinding the rounded corners of the wooden board is fixed to the top of each leg. A transmission component for synchronous adjustment is provided on two corresponding grinding angle components. An adjustment component for adjusting the front and back sides of the grinding circular plate is provided on the back of the backing plate. A positioning component for fixing and grinding the surface of the circular plate is provided at the ends of the single-column threaded block and the double-column threaded block away from the double-headed bolt rod. A replacement component for grinding the surface of the circular plate is provided on each fixing strip. Through the combined use of the grinding angle component, the transmission component, the adjustment component, the positioning component and the replacement component, the present invention can grind and polish the upper and lower ends of the circular plate and then grind and polish the rounded corners of the circular plate, enhancing the working efficiency, improving the accuracy of grinding and polishing, and saving costs.

Description

Technical Field

[0001] The present invention relates to the technical field of woodworking grinding, and particularly to a woodworking grinding device. Background Art

[0002] The polishing and grinding of wood can remove the defects on the wood surface, make it smoother, increase the gloss, and improve the overall aesthetics. The wood surface is more easily coated with a protective layer (such as paint, wax), which can effectively prevent the intrusion of moisture and dirt, reduce the risk of decay and deformation. After polishing, the coating can better adhere to the wood surface, ensuring a lasting painting effect. When grinding and polishing a circular wooden board in the prior art, the side of the circular board needs to be clamped, and when grinding and polishing the rounded corners of the circular board, manual grinding and polishing are often required separately, which not only affects the processing accuracy, but also is time-consuming and laborious, and the processing efficiency is low. Moreover, when grinding and polishing the side rounded corners, since the side of the circular board is clamped, it often affects the grinding of the rounded corners of the circular board. Summary of the Invention

[0003] In order to overcome the deficiencies of the prior art, the present invention provides a woodworking grinding device.

[0004] To solve the above technical problems, the present invention provides the following technical solutions: It includes a base, the top of the base is fixedly connected to a backing plate, three legs are correspondingly fixed on the top of the backing plate, and a set of chamfering components for grinding the rounded corners of wooden boards are fixed on the top of each leg; Each chamfering component includes: a limit plate, two limit posts, two movable bars, two limit gears, two sleeve posts, two movable posts, two first transmission shafts, two clamping pieces, a limit bar and a sliding block; Among them, the limit plate is fixed on the leg, the two limit posts are correspondingly fixed on one side of the limit plate, two corresponding bearings are provided on the limit plate, the two first transmission shafts are respectively fixed to the inner rings of the two bearings on the limit plate, the two limit gears are respectively fixed on the two first transmission shafts, and the two limit gears are meshed, the two movable bars are respectively movably connected to the two limit posts, two sleeve posts are respectively fixed on the two limit gears, movable holes for the sleeve posts to move are provided on the two movable bars, the two sleeve posts are respectively sleeved in the movable holes of the two movable bars, the two movable posts are respectively movably connected to the ends of the two movable bars away from the limit posts, the end of the limit plate away from the limit posts is fixedly connected to the limit bar, the two clamping pieces are respectively fixed to the two movable posts, a slot for the sliding block to be inserted is provided on the limit bar, the two sliding blocks are inserted into the slots of the limit bar, and the two sliding blocks are respectively fixed to the two clamping pieces, and a transmission component for synchronous adjustment is provided on two corresponding chamfering components; The transmission component includes: two bevel gears, two double-headed gear columns, a one-way gear column, a fixed shell, a first bearing piece and a turntable; Among them, the two bevel gears are fixed on the first transmission shaft, the fixed shell is fixed on one side of the two legs, two bearings are provided on the top of the fixed shell, the two double-headed gear columns are respectively fixed to the inner rings of the two bearings on the fixed shell, the first bearing piece is fixed inside the fixed shell, a bearing is provided on the first bearing piece, the one-way gear column is fixed to the inner ring of the bearing of the first bearing piece, the gears at both ends of the two double-headed gear columns are respectively meshed with the corresponding bevel gears and the two gears on the one-way gear column, an opening is provided at one end of the fixed shell, and the end of the one-way gear column passing through the opening is fixedly connected to the turntable. The clamping pieces in the three groups of chamfering components are all corresponding semi-circular blocks, and the two clamping pieces in one of the groups of chamfering components are made of frosted materials for trimming the edges. The semi-circular part of the clamping piece can clamp the side surface of the circular plate without contacting the upper and lower ends of the circular plate.

[0005] Preferably, by the combined use of the chamfering component and the transmission component, when it is necessary to clamp the circular plate, rotate the unidirectional gear column to drive the conical teeth on the first transmission shaft to rotate through the gears at both ends of the double-headed gear column. Then, when the conical teeth drive the first transmission shaft to rotate, the two limit gears rotate. Further, the sleeve columns on the limit gears rotate to drive the two movable strips to move synchronously. Then, the two clamping pieces are limited by the sliding blocks, and the two clamping pieces are adjusted according to the thickness of the edge of the circular plate. When adjusted to the appropriate position, the edge of the circular plate is fixed. When it is necessary to replace the clamping pieces, rotate the limit gears to translate the sliding blocks on the two clamping pieces to release the plugging state with the limit strips and release the movable connection between the movable columns and the movable strips. Then, the clamping pieces can be taken out for replacement. By setting the limit gears, the first transmission shaft, the double-headed gear column and the unidirectional gear column, it is possible to prevent sawdust generated during the grinding and polishing of the circular plate from entering the machine and affecting the operation, the accuracy of chamfering and grinding and polishing.

[0006] As a preferred technical solution of the present invention, an adjusting assembly for adjusting the front and back sides of the grinding circular plate is provided on the back of the backing plate; the adjusting assembly includes: a double-headed bolt rod, a single-column threaded block, a double-column threaded block, a second bearing plate, a linkage plate and two linkage blocks; the second bearing plate is fixed to a corresponding limiting plate, a bearing is provided on the second bearing plate, the double-headed bolt rod is fixed to the inner ring of the bearing of the second bearing plate, the single-column threaded block and the double-column threaded block are respectively threadedly connected to the upper and lower ends of the double-headed bolt rod, one end of the second bearing plate is fixedly connected to the linkage plate, a sliding groove for connecting the linkage blocks is provided on the linkage plate, the two linkage blocks are inserted into the sliding groove of the linkage plate, and the two linkage blocks are respectively fixedly connected to the single-column threaded block and the double-column threaded block. A positioning assembly for fixing and grinding the circular plate surface is provided at the ends of the single-column threaded block and the double-column threaded block away from the double-headed bolt rod; the positioning assembly includes: two motors, two support columns, two second transmission shafts, two bearing discs, four retaining discs and two fixing bars; wherein, the ends of the single-column threaded block and the double-column threaded block away from the double-headed bolt rod are respectively fixed to the two support columns, an opening for connecting the second transmission shaft is provided on each support column, the two second transmission shafts are respectively fixed in the openings of the two support columns, the two motors are correspondingly arranged at one ends of the two second transmission shafts, the second transmission shafts are fixed to the output shafts of the motors, bearings are provided on the two bearing discs, the ends of the two second transmission shafts away from the motors are respectively fixed to the inner rings of the bearings on one bearing disc, two retaining discs are fixed to each end of each bearing disc away from the second transmission shaft, and a fixing bar is fixed between every two retaining discs. The two columns of the double-column threaded block are arranged in a V shape, and the size of the two columns of the second bearing plate is larger than that of the grinding angle assembly. A replacement assembly for grinding the circular plate surface is provided on each fixing bar; each replacement assembly includes: a fixing block, a rotating column, a clamping strip, a plurality of clamping blocks, a grinding strip, a plurality of limiting blocks and a cross block; wherein, the fixing block is in an inverted U shape and is fixed to the fixing bar, a plurality of limiting blocks are correspondingly fixed on the rotating column, a long circular hole for inserting the rotating column is provided on the fixing block, a circular hole is provided at the corresponding position of the fixing bar, and the long circular hole of the fixing block communicates with the circular hole of the fixing bar. The fixing bar is provided with a long cavity, and the long cavity of the fixing bar communicates with the circular hole of the fixing bar. The clamping strip is arranged in the long hole cavity of the fixing bar, a plurality of arc holes for inserting the clamping blocks are provided at the lower end of the clamping strip, the top of the grinding strip is fixedly connected to a plurality of clamping blocks, the plurality of clamping blocks are inserted into the arc holes of the clamping strip, a bearing is provided at the position of the clamping strip corresponding to the circular hole of the fixing bar, the rotating column is fixed to the inner ring of the bearing of the clamping strip, the top of the rotating column is fixed to the cross block, the grinding strip is a frosted structure for grinding the circular plate, the two ends of the fixing bar are in a semi-circular arc angle, and the radian of the semi-circular arc angle of the fixing bar can avoid the clamping piece. The length of the grinding strip corresponds to the diameter of the circular plate.

[0007] Preferably, by the combined use of the adjusting component, the positioning component and the replacing component, when the circular plate surface needs to be polished, rotate the double-headed bolt rod. Then, the single-column thread block and the double-column thread block on the double-headed bolt rod move towards the middle to both ends of the circular plate. Rotate the rotating column to align the grinding strip with the circular long hole on the fixed block, and push the rotating column towards the long hole cavity of the fixed block. Then, the clamping strip drives the grinding strip to closely adhere to the upper and lower ends of the circular plate. Rotate the rotating column to make the grinding strip leave the position of the circular long hole of the fixed block. Then, after starting the motor, the grinding strip polishes the upper and lower ends of the circular plate. When the grinding strip needs to be replaced, release the insertion relationship between the clamping strip and the clamping block, and then replace the grinding strip. When chamfering and trimming the circular plate, rotate the lifting rotating column to make the grinding strip enter the inside of the fixed strip. By rotating the double-headed bolt rod, the two single-column thread blocks move in the corresponding directions. The single-column thread block drives the fixed strip to fit and fix the circular plate. Replace the clamping piece with the required size according to the required fillet size. Then, by rotating the one-way gear column, the gears at both ends of the double-headed gear column drive the conical teeth on the first transmission shaft to rotate. While the conical teeth drive the first transmission shaft to rotate, the two limit gears rotate. Then, the sleeve columns on the limit gears rotate to drive the two movable strips to move synchronously. The two movable strips drive the clamping piece to be adjusted to the corresponding right-angle position of the circular plate through the movable column and fit with the circular plate. Start the motor. Then, the motor drives the corresponding fixed strip to rotate through the second transmission shaft. The two fixed strips drive the fixed circular plate to rotate. When the circular plate rotates, because the right-angle side of the circular plate fits with the two clamping pieces, the circular plate is chamfered and edge-ground by the clamping pieces when being driven by the motor to rotate.

[0008] Compared with the prior art, the beneficial effects that the present invention can achieve are as follows:

[0009] 1. Through the combined use of the angle grinding component and the transmission component, the circular plate can be effectively fixed, and then the upper and lower ends of the circular plate can be polished. When the circular plate needs to be chamfered and polished, the circular plate can be chamfered and polished, and the synchronous operation can avoid affecting the accuracy of the chamfering.

[0010] 2. Through the combined use of the adjusting component, the positioning component and the replacing component, the upper and lower ends of the circular plate can be precisely polished, and the circular plate can be clamped and restricted when the fillet of the circular plate is polished.

[0011] 3. Through the combined use of the angle grinding component, the transmission component, the adjusting component, the positioning component and the replacing component, the upper and lower ends of the circular plate can be polished and then the fillet of the circular plate can be polished, which enhances the working efficiency, improves the accuracy of polishing, saves costs, and avoids the phenomenon that the circular plate is bumped due to the need to turn over and move during polishing. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is the overall structural schematic diagram of the present invention;

[0013] Figure 2 Schematic diagram of the backing plate structure of the present invention;

[0014] Figure 3 Schematic diagram of the second bearing piece structure of the present invention;

[0015] Figure 4 Schematic diagram of the limiting plate structure of the present invention;

[0016] Figure 5 Schematic diagram of the double-headed bolt rod structure of the present invention;

[0017] Figure 6 Schematic diagram of the support column structure of the present invention;

[0018] Figure 7 Schematic diagram of the fixing strip structure of the present invention;

[0019] Figure 8 is Figure 7 Partial structure diagram of A in;

[0020] Figure 9 Schematic diagram of the double-headed gear column structure of the present invention.

[0021] Wherein: 1, base; 2, backing plate; 3, leg; 4, limiting plate; 5, limiting column; 6, movable strip; 7, limiting gear; 8, sleeve column; 9, movable column; 10, first transmission shaft; 11, clip; 12, limiting strip; 13, sliding block; 14, movable hole; 15, double-headed bolt rod; 16, single-column threaded block; 17, motor; 18, support column; 19, second transmission shaft; 20, bearing disc; 21, retaining disc; 22, fixing strip; 23, fixing block; 24, rotating column; 25, clamping strip; 26, clamping block; 27, grinding strip; 28, cross block; 29, tapered tooth; 30, double-headed gear column; 31, one-way gear column; 32, fixed shell; 33, first bearing piece; 34, turntable; 35, double-column threaded block; 36, second bearing piece; 37, linkage plate; 38, linkage block; 39, limiting block. Detailed implementation manners

[0022] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments. However, the following embodiments are only the preferred embodiments of the present invention, not all of them. Based on the embodiments in the implementation manners, other embodiments obtained by those skilled in the art without creative efforts all belong to the protection scope of the present invention. The experimental methods in the following embodiments are all conventional methods unless otherwise specified, and the materials, reagents, etc. used in the following embodiments can all be obtained from commercial channels unless otherwise specified.

[0023] Embodiment: As Figure 1, Figure 2 , Figure 3 , Figure 4 and Figure 9 As shown in Figure 2 , Figure 3 , Figure 4 and Figure 9 , it includes a base 1. The top of the base 1 is fixedly connected to a backing plate 2. Three legs 3 are fixedly corresponding to the top of the backing plate 2. A set of angle grinding components for grinding the rounded corners of wooden boards are fixedly provided at the top of each leg 3. Each angle grinding component includes: a limit plate 4, two limit posts 5, two movable bars 6, two limit gears 7, two sleeve posts 8, two movable posts 9, two first transmission shafts 10, two clamping pieces 11, a limit strip 12 and a sliding block 13. Among them, the limit plate 4 is fixed on the leg 3. The two limit posts 5 are fixedly corresponding to one side of the limit plate 4. Two corresponding bearings are provided on the limit plate 4. The two first transmission shafts 10 are respectively fixedly connected to the inner rings of the two bearings on the limit plate 4. The two limit gears 7 are respectively fixed on the two first transmission shafts 10, and the two limit gears 7 are meshed. The two movable bars 6 are respectively movably connected to the two limit posts 5. Two sleeve posts 8 are respectively fixed on the two limit gears 7. Movable holes 14 for the sleeve posts 8 to move are provided on the two movable bars 6. The two sleeve posts 8 are respectively sleeved in the movable holes 14 of the two movable bars 6. The two movable posts 9 are respectively movably connected to one ends of the two movable bars 6 away from the limit posts 5. One end of the limit plate 4 away from the limit posts 5 is fixedly connected to the limit strip 12. The two clamping pieces 11 are respectively fixedly connected to the two movable posts 9. A slot for the sliding block 13 to be inserted is provided on the limit strip 12. The two sliding blocks 13 are inserted into the slots of the limit strip 12. The two sliding blocks 13 are respectively fixedly connected to the two clamping pieces 11. A transmission component for synchronous adjustment is provided on two corresponding angle grinding components. The transmission component includes: two bevel gears 29, two double-headed gear columns 30, a one-way gear column 31, a fixed shell 32, a first bearing piece 33 and a turntable 34. Among them, the two bevel gears 29 are fixed on the first transmission shaft 10. The fixed shell 32 is fixed on one side of the two legs 3. Two bearings are provided at the top of the fixed shell 32. The two double-headed gear columns 30 are respectively fixedly connected to the inner rings of the two bearings on the fixed shell 32. The first bearing piece 33 is fixed inside the fixed shell 32. A bearing is provided on the first bearing piece 33. The one-way gear column 31 is fixedly connected to the inner ring of the bearing on the first bearing piece 33. The gears at both ends of the two double-headed gear columns 30 are respectively meshed with the corresponding bevel gears 29 and the two gears on the one-way gear column 31. An opening is provided at one end of the fixed shell 32. One end of the one-way gear column 31 passing through the opening is fixedly connected to the turntable 34. The clamping pieces 11 in the three groups of angle grinding components are all corresponding semi-circular blocks, and the two clamping pieces 11 in one of the groups of angle grinding components are made of frosting materials for trimming the edges. The semi-circular part of the clamping piece 11 can clamp the side surface of the circular plate without contacting the upper and lower ends of the circular plate.

[0024] As Figure 1 , Figure 2 , Figure 3 , Figure 5 ,Figure 6 , Figure 7 and Figure 8As shown, an adjustment component for adjusting the front and back sides of the grinding circular plate is provided on the back of the backing plate 2; the adjustment component includes: a double-headed bolt rod 15, a single-column threaded block 16, a double-column threaded block 35, a second bearing piece 36, a linkage plate 37 and two linkage blocks 38; the second bearing piece 36 is fixed to a corresponding limit plate 4, a bearing is provided on the second bearing piece 36, the double-headed bolt rod 15 is fixed to the inner ring of the bearing of the second bearing piece 36, the single-column threaded block 16 and the double-column threaded block 35 are respectively threadedly connected to the upper and lower ends of the double-headed bolt rod 15, one end of the second bearing piece 36 is fixedly connected to the linkage plate 37, a sliding groove for connecting the linkage block 38 is provided on the linkage plate 37, the two linkage blocks 38 are inserted into the sliding groove of the linkage plate 37, and the two linkage blocks 38 are respectively fixedly connected to the single-column threaded block 16 and the double-column threaded block 35. A positioning component for fixing and grinding the circular plate surface is provided at the end of the single-column threaded block 16 and the double-column threaded block 35 away from the double-headed bolt rod 15; the positioning component includes: two motors 17, two support columns 18, two second transmission shafts 19, two bearing discs 20, four retaining discs 21 and two fixing strips 22; wherein, the ends of the single-column threaded block 16 and the double-column threaded block 35 away from the double-headed bolt rod 15 are respectively fixed to the two support columns 18, an opening for connecting the second transmission shaft 19 is provided on each support column 18, the two second transmission shafts 19 are respectively fixed in the openings of the two support columns 18, the two motors 17 are correspondingly arranged at one end of the two second transmission shafts 19, the second transmission shaft 19 is fixed to the output shaft of the motor 17, bearings are provided on the two bearing discs 20, the ends of the two second transmission shafts 19 away from the motor 17 are respectively fixed to the inner ring of the bearing on one bearing disc 20, two retaining discs 21 are fixed to each end of the bearing disc 20 away from the second transmission shaft 19, and a fixing strip 22 is fixed between every two retaining discs 21. The double columns of the double-column threaded block 35 are arranged in a V shape, and the size of the double columns of the second bearing piece 36 is larger than that of the grinding angle component. A replacement component for grinding the circular plate surface is provided on each fixing strip 22; each replacement component includes: a fixing block 23, a rotating column 24, a clamping strip 25, a plurality of clamping blocks 26, a grinding strip 27, a plurality of limiting blocks 39 and a cross block 28;Among them, the fixed block 23 is in an inverted U shape and is fixed on the fixed strip 22. A number of limiting blocks 39 are correspondingly fixed on the rotating column 24. The fixed block 23 is provided with a long circular hole for the insertion of the rotating column 24. The corresponding position of the fixed strip 22 is provided with a circular hole, and the long circular hole of the fixed block 23 communicates with the circular hole of the fixed strip 22. The fixed strip 22 is provided with a long cavity, and the long cavity of the fixed strip 22 communicates with the circular hole of the fixed strip 22. The clamping strip 25 is arranged in the long hole cavity of the fixed strip 22. The lower end of the clamping strip 25 is provided with a number of arc holes for the insertion of the clamping blocks 26. The top of the grinding strip 27 is fixedly connected to a number of clamping blocks 26. A number of clamping blocks 26 are inserted into the arc holes of the clamping strip 25. A bearing is provided at the position of the clamping strip 25 corresponding to the circular hole of the fixed strip 22. The rotating column 24 is fixedly connected to the inner ring of the bearing of the clamping strip 25. The top of the rotating column 24 is fixedly connected to the cross block 28. The grinding strip 27 is a frosted structure for grinding the circular plate. The two ends of the fixed strip 22 are semi-arc angles, and the radian of the semi-arc angle of the fixed strip 22 can avoid the clamping piece 11. The length of the grinding strip 27 corresponds to the diameter of the circular plate.;

[0025] Working principle:

[0026] When it is necessary to clamp the circular plate, rotate the one-way gear column 31 to drive the conical tooth 29 on the first transmission shaft 10 to rotate through the gears at both ends of the double-headed gear column 30. Then, when the conical tooth 29 drives the first transmission shaft 10 to rotate, the two limit gears 7 rotate. Further, the sleeve columns 8 on the limit gears 7 rotate to drive the two movable strips 6 to move synchronously. Further, the two clamping pieces 11 are limited by the sliding blocks 13. The two clamping pieces 11 are adjusted according to the thickness of the edge of the circular plate. When adjusted to the appropriate position, the edge of the circular plate is fixed. When it is necessary to replace the clamping piece 11, rotate the limit gear 7 to translate the sliding blocks 13 on the two clamping pieces 11 to release the plug-in state with the limit strip 12, and release the movable connection between the movable column 9 and the movable strip 6. Then, the clamping piece 11 can be taken out for replacement. By setting the limit gear 7, the first transmission shaft 10, the double-headed gear column 30 and the one-way gear column 31, it is possible to prevent sawdust generated during the grinding and polishing of the circular plate from entering the machine interior and affecting the operation, the accuracy of chamfering and grinding and polishing. When it is necessary to grind the surface of the circular plate, rotate the double-headed bolt rod 15. Then, the single-column threaded block 16 and the double-column threaded block 35 on the double-headed bolt rod 15 move towards the middle to the two ends of the circular plate. Rotate the rotating column 24 to align the grinding strip 27 with the long circular hole on the fixed block 23. Push the rotating column 24 towards the long hole cavity of the fixed block 23. Then, the clamping strip 25 drives the grinding strip 27 to closely adhere to the upper and lower ends of the circular plate. Rotate the rotating column 24 to make the grinding strip 27 leave the position of the long circular hole of the fixed block 23. Then, after starting the motor 17, the grinding strip 27 grinds the upper and lower ends of the circular plate. When it is necessary to replace the grinding strip 27, release the plug-in relationship between the clamping strip 25 and the clamping block 26, and then replace the grinding strip 27. When it is necessary to chamfer and trim the circular plate, rotate the lifting rotating column 24 to make the grinding strip 27 enter the inside of the fixed strip 22. By rotating the double-headed bolt rod 15, the two single-column threaded blocks 16 move towards the corresponding directions. The single-column threaded block 16 drives the fixed strip 22 to fit and fix the circular plate. Replace the clamping piece 11 with the required size according to the required fillet size. Then, rotate the one-way gear column 31 to drive the conical tooth 29 on the first transmission shaft 10 to rotate through the gears at both ends of the double-headed gear column 30. While the conical tooth 29 drives the first transmission shaft 10 to rotate, the two limit gears 7 rotate. Further, the sleeve columns 8 on the limit gears 7 rotate to drive the two movable strips 6 to move synchronously. The two movable strips 6 drive the clamping piece 11 to be adjusted to the right-angle position corresponding to the circular plate and fit with the circular plate through the movable column 9. Start the motor 17. Then, the motor 17 drives the corresponding fixed strip 22 to rotate through the second transmission shaft 19. The two fixed strips 22 drive the fixed circular plate to rotate self. When the circular plate rotates self, because the right-angle edge of the circular plate fits with the two clamping pieces 11, the circular plate is chamfered and edge-ground by the clamping pieces 11 when being driven by the motor 17 to rotate self.

[0027] The embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited thereto, and various changes can be made without departing from the spirit of the present invention within the scope of knowledge possessed by those skilled in the relevant art.

Claims

1. A woodworking grinding device, comprising a base (1), the top of the base (1) being fixedly connected to a backing plate (2), characterized in that: Three supporting legs (3) are fixed to the top of the pad (2), and a group of grinding components for grinding the rounded corners of the wooden board is fixed to the top of each supporting leg (3); Each angle grinding assembly comprises: a limit plate (4), two limit columns (5), two movable bars (6), two limit gears (7), two sleeve columns (8), two movable columns (9), two first transmission shafts (10), two clips (11), a limit bar (12) and a sliding block (13); The limiting plate (4) is fixed on the supporting leg (3), the two limiting columns (5) are correspondingly fixed on one side of the limiting plate (4), the limiting plate (4) is provided with two corresponding bearings, the two first transmission shafts (10) are respectively fixed to the two inner rings of the bearings on the limiting plate (4), the two limiting gears (7) are respectively fixed on the two first transmission shafts (10), and the two limiting gears (7) are meshed, the two movable bars (6) are respectively movably connected to the two limiting columns (5), the two limiting gears (7) are respectively fixed to the two sleeve columns (8), and the two movable bars (6) are provided with movable parts for the sleeve columns (8) to move. The movable hole (14) is provided with two sleeve columns (8) respectively sleeved in the movable holes (14) of the two movable bars (6); the two movable columns (9) are respectively movably connected to one end of the two movable bars (6) away from the limiting column (5); one end of the limiting plate (4) away from the limiting column (5) is fixedly connected to the limiting bar (12); the two clips (11) are respectively fixedly connected to the two movable columns (9); the limiting bar (12) is provided with a slot for inserting a sliding block (13); the two sliding blocks (13) are inserted into the slot of the limiting bar (12); and the two sliding blocks (13) are respectively fixedly connected to the two clips (11); A transmission assembly for synchronous adjustment is provided on the two corresponding angle grinding assemblies; The transmission assembly comprises: two conical teeth (29), two double-headed gear columns (30), a one-way gear column (31), a fixed shell (32), a first bearing plate (33) and a rotating disk (34); The two conical teeth (29) are fixed on the first transmission shaft (10), the fixed shell (32) is fixed on one side of the two legs (3), two bearings are arranged on the top of the fixed shell (32), the two double-headed gear columns (30) are respectively fixed to the inner rings of the bearings on the two fixed shells (32), the first bearing sheet (33) is fixed inside the fixed shell (32), the first bearing sheet (33) is provided with a bearing, the one-way gear column (31) is fixed to the inner ring of the bearing of the first bearing sheet (33), the gears at both ends of the two double-headed gear columns (30) are respectively meshed with the corresponding conical teeth (29) and the two gears on the one-way gear column (31), one end of the fixed shell (32) is provided with an opening, and one end of the one-way gear column (31) passing through the opening is fixedly connected to the rotating disk (34); The clips (11) in the three groups of angle grinding assemblies are all corresponding semi-arc blocks, and the two clips (11) in one group of angle grinding assemblies are made of frosted material for trimming the edges, and the semi-arcs of the clips (11) can clamp the side of the circular plate without contacting the upper and lower ends of the circular plate.

2. A woodworking grinding device according to claim 1, characterized in that: The back of the backing plate (2) is provided with an adjustment component for adjusting the front and back sides of the grinding circular plate; The adjustment assembly comprises: a stud bolt rod (15), a single-column threaded block (16), a double-column threaded block (35), a second bearing plate (36), a linkage plate (37) and two linkage blocks (38); The second bearing plate (36) is fixed to a corresponding limiting plate (4), a bearing is provided on the second bearing plate (36), the stud bolt rod (15) is fixed to the inner ring of the bearing of the second bearing plate (36), the single-column threaded block (16) and the double-column threaded block (35) are respectively threadedly connected to the upper and lower ends of the stud bolt rod (15), one end of the second bearing plate (36) is fixedly connected to the linkage plate (37), a sliding groove for connecting the linkage block (38) is provided on the linkage plate (37), the two linkage blocks (38) are inserted into the sliding groove of the linkage plate (37), and the two linkage blocks (38) are respectively fixedly connected to the single-column threaded block (16) and the double-column threaded block (35).

3. A woodworking grinding device according to claim 2, characterized in that: The ends of the single-column threaded block (16) and the double-column threaded block (35) away from the stud bolt rod (15) are provided with positioning components for fixing and grinding the circular plate surface; The positioning assembly comprises: two motors (17), two support columns (18), two second transmission shafts (19), two bearing plates (20), four baffle plates (21) and two fixing bars (22); The ends of the single-column threaded block (16) and the double-column threaded block (35) away from the stud bolt rod (15) are respectively fixed to two support columns (18); each support column (18) is provided with an opening for connecting the second transmission shaft (19); the two second transmission shafts (19) are respectively fixed in the openings of the two support columns (18); the two motors (17) are correspondingly arranged at one end of the two second transmission shafts (19); the second transmission shafts (19) are fixed to the output shafts of the motors (17); the two bearing plates (20) are provided with bearings; the ends of the two second transmission shafts (19) away from the motors (17) are fixed to the inner ring of the bearing on a bearing plate (20); the ends of each bearing plate (20) away from the second transmission shaft (19) are fixed to two baffle plates (21); and a fixing strip (22) is fixed in the middle of each of the two baffle plates (21); the double columns of the double-column threaded block (35) are arranged in a V shape, and the size of the double columns of the second bearing plate (36) is larger than the angle grinding assembly.

4. A woodworking grinding device according to claim 3, characterized in that: Each of the fixing bars (22) is provided with a replacement component for grinding the circular plate surface; Each replacement assembly comprises: a fixed block (23), a rotating column (24), a clamping bar (25), a plurality of clamping blocks (26), a grinding bar (27), a plurality of limit blocks (39) and a cross block (28); The fixing block (23) is in an inverted U shape, the fixing block (23) is fixed on the fixing bar (22), a plurality of limit blocks (39) are correspondingly fixed on the rotating column (24), the fixing block (23) is provided with a round long hole for plugging the rotating column (24), a round hole is provided at a corresponding position of the fixing bar (22), and the round long hole of the fixing block (23) is connected to the round hole of the fixing bar (22), the fixing bar (22) is provided with a long cavity, and the long cavity of the fixing bar (22) is connected to the round hole of the fixing bar (22), and the card The strip (25) is arranged in the long hole cavity of the fixed strip (22); the lower end of the clamping strip (25) is provided with a plurality of arc holes for plugging the clamping blocks (26); the top of the grinding strip (27) is fixedly connected to the plurality of clamping blocks (26); the plurality of clamping blocks (26) are plugged into the arc holes of the clamping strip (25); bearings are provided at positions corresponding to the circular holes of the clamping strip (25) and the fixed strip (22); the rotating column (24) is fixed to the inner ring of the bearing of the clamping strip (25); and the top of the rotating column (24) is fixed to the cross block (28).

5. A woodworking grinding device according to claim 4, characterized in that: The grinding strip (27) is a grinding structure used for grinding a circular plate. Both ends of the fixed strip (22) are semi-arc angles. The arc of the semi-arc angle of the fixed strip (22) can avoid the clamping piece (11). The length of the grinding strip (27) corresponds to the diameter of the circular plate.

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