Plate cutting device

Abstract

The utility model relates to the technical field of plate cutting, in particular to a plate cutting device which comprises a cutting bed, a cutting machine used for cutting plates is installed on the cutting bed, a fixing device used for fixing the plates is connected to the cutting bed in a sliding mode, and the fixing device comprises an axial fixing device with the two ends clamping the plates. The axial fixing device is provided with a transverse fixing device for clamping a plate from the two sides, and the on-shaft fixing device is further provided with a longitudinal fixing device for longitudinally pressing the upper surface of the plate. Compared with the prior art, the axial fixing device, the transverse fixing device and the longitudinal fixing device are arranged to fix the front face, the rear face, the left face, the right face, the upper face and the lower face of a plate, and the problems that due to the fact that the fixing devices can only clamp the plate from the two sides of the plate, gaps are generated in the middle of the plate, and the plate vibrates longitudinally in the cutting process are solved. Therefore, a fixing device cannot stably clamp the plate, and the cutting precision of the plate is influenced.

Description

Technical Field

[0001] The utility model patent relates to the technical field of plate cutting, and specifically to a plate cutting device. Background Art

[0002] Wood boards are made of complete wood. These boards are strong, durable, and have natural textures, making them an excellent choice in decoration. Wood boards are generally classified according to their actual names and do not have a unified standard specification. Wood boards are commonly used materials in building materials. Currently, when using a cutting device to cut wood boards, people usually manually press the wood board onto the cutting bed and push the wood board towards the saw blade. This way of cutting wood boards has low precision. At the same time, two actions of manual pressing and forward pushing are required, resulting in a relatively high labor intensity after long-term work.

[0003] Regarding the above problems, there are some solutions. For example, the Chinese patent "A Wood Board Cutting Device" (Patent No. ZL202323109533.7, publication date 20240621) describes the following structure: A wood board cutting device includes a bottom plate, fixed rods symmetrically arranged on the top surface of the bottom plate, a rotating shaft arranged between the fixed rods, a sawing machine assembly arranged on the rotating shaft through the fixed rods, a cutting groove opened on the top surface of the bottom plate, and a fixing device arranged on the top surface of the bottom plate and between the fixed rods. In the present utility model, the bottom plate serves as a support for the entire cutting device, and the fixed rods fix the sawing machine assembly, facilitating the cutting of the wood board by the sawing machine assembly. The cutting groove is opened on the top surface of the bottom plate. When cutting the wood board, the sawing machine assembly will enter the cutting groove to ensure complete cutting of the wood board.

[0004] The above-mentioned wood board cutting device in the prior art can fix and position the wood board during cutting, preventing displacement during cutting, affecting the quality of the cut product, and reducing the labor intensity of the operator. However, this cutting device still has the following defects during actual use: The fixing device only considers the horizontal displacement of the wood board and does not consider the problem of longitudinal vibration generated by the plate during cutting. Longitudinal vibration may cause the plate to shift. At the same time, when the fixing device clamps the plate from both sides, when a gap is generated in the middle of the plate during cutting, a deformation space is generated in the middle of the plate, which may cause the fixing device to ultimately be unable to clamp both sides of the plate. The vibration generated during continuous cutting causes the plate to break away from the fixing device or shift, ultimately affecting the cutting accuracy. Summary of the Utility Model

[0005] The utility model aims to provide a sheet cutting device, which mainly solves the technical problem existing in the prior art that since the fixing device can only clamp the sheet from both sides of the sheet, with the generation of gaps in the middle of the sheet and the longitudinal vibration of the sheet during the cutting process, the fixing device cannot stably clamp the sheet, affecting the cutting accuracy of the sheet.

[0006] To solve the above technical problems, the utility model provides the following technical solutions:

[0007] A sheet cutting device includes a cutting bed, a cutting machine for cutting the sheet is installed on the cutting bed, and a fixing device for fixing the sheet is slidably connected to the cutting bed. The fixing device includes an axial fixing device for clamping the sheet from both ends, a transverse fixing device for clamping the sheet from both sides is installed on the axial fixing device, and a longitudinal fixing device for longitudinally pressing the upper surface of the sheet is also installed on the axial fixing device.

[0008] The beneficial effects of this solution are as follows:

[0009] In this solution, the sheet is fixed on the front, back, left, right, top, and bottom six sides by the axial fixing device, the transverse fixing device, and the longitudinal fixing device. When gaps are generated in the sheet due to cutting, the transverse fixing device cannot well fix the side of the sheet, but the axial fixing device and the longitudinal fixing device still provide a clamping force to the sheet, making the sheet more stably clamped and preventing the sheet from being displaced due to the vibration generated during cutting, ultimately affecting the cutting accuracy of the sheet. This solves the technical problem existing in the prior art that since the fixing device can only clamp the sheet from both sides of the sheet, with the generation of gaps in the middle of the sheet and the longitudinal vibration of the sheet during the cutting process, the fixing device cannot stably clamp the sheet, affecting the cutting accuracy of the sheet.

[0010] Preferably, a strip-shaped groove is opened in the middle of the cutting bed, and a cutting machine is installed on the cutting bed. The blade of the cutting machine itself is inserted into the strip-shaped groove from below the cutting bed and extends above the cutting bed. In this solution, the blade of the cutting machine rotates continuously, and the operator only needs to push the sheet to make the wooden board move on the cutting bed to cut the sheet.

[0011] Preferably, two first sliding grooves are further formed on the upper surface of the cutting bed on both sides of the strip-shaped groove. The length directions of the first sliding grooves are parallel to the length direction of the strip-shaped groove. A sliding rod is fixed above the length of the first sliding groove in the first sliding groove; the axial fixing device includes an abutting device and a first fixing plate; rectangular blocks that match the first sliding groove and can slide in the first sliding groove are fixed on the lower surfaces of the abutting device and the first fixing plate, and the sliding rod penetrates through all the rectangular blocks in the corresponding first sliding groove; a spring is arranged between the rectangular block on the abutting device and the end of the first sliding groove, and two ends of the spring are respectively fixedly connected to the end of the first sliding groove and the fixing block on the abutting device. In this solution, the plate is placed on the cutting bed and located between the abutting device and the first fixing plate. The first fixing plate is pushed, so that the plate is pushed towards the abutting device, and finally the plate is clamped between the first fixing plate and the abutting device. Continuing to push the first fixing plate can push the abutting device to slide against the elastic force of the spring. The abutting device and the first fixing plate clamp the plate and slide on the surface of the cutting bed, so that the plate can be cut by the blade of the cutting machine.

[0012] Preferably, the abutting device includes a second fixing plate and a third fixing plate that can slide on the cutting bed; rectangular blocks that are inserted into and slide in the first sliding groove are fixed at the lower ends of the second fixing plate and the third fixing plate, and the sliding rod in the first sliding groove passes through the middle of the rectangular block; the height of the third fixing plate is greater than that of the second fixing plate; the second fixing plate is located between the third fixing plate and the first fixing plate, and the second fixing plate is in contact with the plate; the longitudinal fixing device is installed at the upper end of the second fixing plate, and the longitudinal fixing device includes at least two pressing devices. The pressing device includes two connecting plates fixed at the upper end of the second fixing plate. A rotating shaft is rotatably connected between the two connecting plates, and a pressing rod is fixedly connected to the rotating shaft. The lower surface of the pressing rod always contacts the upper edge of the third fixing plate, and the lower end of the pressing rod contacts the upper surface of the plate. In this solution, the first fixing block pushes the plate close to the surface of the second fixing plate, and at the same time pushes the second fixing plate towards the third fixing plate; during the process of the second fixing plate moving towards the third fixing plate, the upper end of the third fixing plate pushes the pressing rod to flip, so that the lower end of the pressing rod rotates and presses on the upper surface of the plate, pressing the plate on the surface of the cutting bed, and reducing the influence of the longitudinal vibration generated by the plate during cutting on the cutting accuracy.

[0013] Preferably, the transverse fixing device includes two sets of clamping devices arranged on the first fixing plate. Each clamping device includes a first screw rod and a clamping plate. On the side of the first fixing plate facing the second fixing plate, a second sliding groove is formed, which communicates with the surfaces at both ends of the second fixing plate. The first screw rod is rotatably connected to the end of the second sliding groove, and the length direction of the first screw rod is parallel to the length direction of the second sliding groove. The clamping plate is located between the first fixing plate and the second fixing plate and is perpendicular to the surface of the first fixing plate. A slider is fixed to one end of the clamping plate close to the second sliding groove, and the slider is threadedly connected to the first screw rod. The lower surface of the clamping plate closely adheres to the upper surface of the cutting bed, and the side surface of the clamping plate closely adheres to the surface of the first fixing plate. A rotating device for driving the first screw rod to rotate is also installed on the first screw rod, and the rotating device is located outside the second sliding groove. In this solution, rotating the rotating device drives the first screw rod to rotate, thereby driving the slider to move on the first screw rod and within the second sliding groove, and then driving the clamping plate to move. The clamping plates of the two sets of clamping devices can be adjusted to be closer or farther away from each other, so as to clamp or release the plate. At the same time, the relative positions of the two clamping devices and the cutting bed can be controlled separately, so as to adjust the relative position of the plate and the cutting machine blade on the cutting bed, and thus control the size of the plate divided by the cutting machine.

[0014] Preferably, the rotating device includes a rotating disk fixed to the end of the first screw rod and coaxially arranged with the first screw rod. A number of positioning holes are formed on the rotating disk at equal distances around the center of the rotating disk. A threaded hole matching the positioning hole is formed at one end of the first fixing plate close to the rotating disk. A second screw rod is inserted into the threaded hole and one of the positioning holes together, and the second screw rod is threadedly connected to the threaded hole. One end of the second screw rod extends out of the positioning hole and is fixed with a screw head. In this solution, rotating the rotating disk drives the first screw rod to rotate. After driving the slider to move to a suitable position, insert the second screw rod into the aligned threaded hole and positioning hole to position the rotating disk, and thus position the clamping plate.

[0015] Preferably, the clamping plates of the two sets of clamping devices are arranged in parallel, and reinforcing plates are fixed to the lower ends of the opposite sides of the clamping plates. Reinforcing ribs are arranged between the reinforcing plates and the clamping plates. In this solution, the function of setting the reinforcing plates is to increase the contact area between the clamping plates and the cutting bed, making the structure of the clamping plates more stable. At the same time, the reinforcing ribs are set to increase the structural strength between the clamping plates and the reinforcing plates, making it more firm and stable when clamping both sides of the plate.

[0016] Preferably, chamfers are processed on the upper edges of the opposite sides of the two clamping plates. In this solution, the function of the chamfers is that when continuously cutting plates of the same size, only need to adjust the distance between the clamping plates once according to the width of the plate. Then, during the batch processing, only need to insert the plate between the two clamping plates from the upper right. The function of the chamfers is to make it smoother when the plate is inserted between the clamping plates.

[0017] Preferably, the first fixing plate, the second fixing plate, and the third fixing plate are provided with hollow openings for accommodating the cutting blade of the cutting machine to pass through. Description of the Drawings

[0018] Figure 1 is a three-dimensional structure diagram of a sheet cutting device of the utility model patent;

[0019] Figure 2 is an enlarged view at A of a sheet cutting device of the utility model patent;

[0020] Figure 3 is an enlarged view at B of a sheet cutting device of the utility model patent.

[0021] The reference numerals in the accompanying drawings of the specification include: cutting bed 1, first chute 11, sliding rod 12, spring 13, strip-shaped groove 14, cutting machine 2, blade 21, first fixing plate 31, clamping plate 311, slider 312, reinforcing plate 313, reinforcing rib 314, first screw 315, rotating disk 316, positioning hole 3161, screw head 3162, second fixing plate 32, connecting plate 321, rotating shaft 322, pressing rod 323, third fixing plate 33, sheet 4, hollow opening 5. Detailed Description of the Invention

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0023] As Figure 1 shown, a sheet cutting device includes a cutting bed 1, a cutting machine 2 for cutting the sheet 4 is installed on the cutting bed 1, a fixing device for fixing the sheet 4 is slidably connected to the cutting bed 1, the fixing device includes an axial fixing device for clamping the sheet at both ends, a transverse fixing device for clamping the sheet from both sides is installed on the axial fixing device, and a longitudinal fixing device for pressing the upper surface of the sheet 4 longitudinally is also installed on the axial fixing device.

[0024] The sheet 4 is fixed on the front, rear, left, right, upper, and lower six sides by the axial fixing device, the transverse fixing device, and the longitudinal fixing device. When the sheet 4 generates a gap due to cutting, the transverse fixing device cannot well fix the side of the sheet 4, but the axial fixing device and the longitudinal fixing device still provide a clamping force to the sheet 4, so that the sheet 4 is clamped more stably and will not be displaced due to the vibration generated during cutting, ultimately affecting the cutting accuracy of the sheet 4.

[0025] A strip-shaped groove 14 is formed in the middle of the cutting bed 1, and a cutting machine 2 is installed on the cutting bed 1. The blade 21 of the cutting machine 2 itself is inserted into the strip-shaped groove 14 from below the cutting bed 1 and extends above the cutting bed 1. The blade 21 of the cutting machine 2 rotates continuously. The operator only needs to push the plate 4 to move the wood board on the cutting bed 1, and then the plate 4 can be cut. Two first sliding grooves 11 are also formed on the upper surface of the cutting bed 1 on both sides of the strip-shaped groove 14. The length directions of the first sliding grooves 11 are parallel to the length direction of the strip-shaped groove 14. A sliding rod 12 is fixed along the upper part of the length of the first sliding groove 11 in the first sliding groove 11.

[0026] In some embodiments, such as Figure 1 , Figure 2 , Figure 3 shown, the axial fixing device includes a first fixing plate 31, a second fixing plate 32, and a third fixing plate 33 arranged in sequence. The plate 4 is located between the first fixing plate 31 and the second fixing plate 32. The first, second, and third fixing plates 33 are all perpendicular to the upper surface of the cutting bed 1, and the length directions of the first, second, and third fixing plates 33 are all perpendicular to the length direction of the first sliding groove 11. Rectangular blocks are installed at the bottoms of the first, second, and third fixing plates. The rectangular blocks are inserted into the first sliding groove 11 and are in contact with the edge of the first sliding groove 11, and can slide freely along the direction of the first sliding groove 11. The sliding rod 12 penetrates through all the rectangular blocks inserted into the corresponding first sliding grooves 11. A spring 13 is arranged in the first sliding groove 11. The two ends of the spring 13 are respectively fixed to the rectangular block on the third fixing plate 33 and the end of the first sliding groove 11. Hollow openings 5 for allowing the blade 21 of the cutting machine 2 to pass through are formed on the first fixing plate 31, the second fixing plate 32, and the third fixing plate 33. During the actual operation process, the plate 4 is placed on the cutting bed 1 and is located between the second fixing plate 32 and the first fixing plate 31. The first fixing plate 31 is pushed, so that the plate 4 is pushed towards the second fixing plate 32, and finally the plate 4 is clamped between the first fixing plate 31 and the second fixing plate 32. By continuing to push the first fixing plate 31, the second fixing plate 32 pushes the third fixing plate 33, and then the third fixing plate 33 can be pushed to slide on the cutting bed 1 against the elastic force of the spring 13. The blade 21 passes through the hollow opening 5, and then the plate 4 can be driven to slide on the cutting bed 1, so that the plate 4 is cut by the blade 21 of the cutting machine 2.

[0027] In some embodiments, such as Figure 2As shown in the figure, the longitudinal fixing device includes at least two sets of pressing devices. Each pressing device includes two connecting plates 321 fixed to the upper end of the second fixing plate 32. A rotating shaft 322 is rotatably connected between the two connecting plates 321. A pressing rod 323 is fixedly connected to the rotating shaft 322. The lower surface of the pressing rod 323 always contacts the upper edge of the third fixing plate 33. Specifically, the rotating shaft 322 is fixed to the middle and lower part of the pressing rod 323. The length and weight of the upper half of the pressing rod 323 located on the rotating shaft 322 are greater than those of the lower half of the pressing rod 323 located on the rotating shaft 322. The purpose is to make the center of the pressing rod 323 located in the upper half in the natural state, resting on the second fixing plate 32, while the lower end of the pressing rod 323 is lifted, facilitating the placement of the plate 4 under the pressing rod 323. The height of the third fixing plate 33 is greater than that of the second fixing plate 32, so that the pressing rod 323 is held by the third fixing plate 33 and is inclined, and the lower end of the pressing rod 323 contacts the upper surface of the plate 4. During the actual operation, the first fixing block pushes the plate 4 close to the surface of the second fixing plate 32, and at the same time pushes the second fixing plate 32 towards the third fixing plate 33. During the process of the second fixing plate 32 moving towards the third fixing plate 33, the upper end of the third fixing plate 33 pushes the pressing rod 323 to flip, and then the lower end of the pressing rod 323 rotates and presses on the upper surface of the plate 4, pressing the plate 4 against the surface of the cutting bed 1, reducing the influence of the longitudinal vibration generated by the plate 4 during cutting on the cutting accuracy. Moreover, in this device, the force exerted by the pressing rod 323 on the plate 4 can be adjusted by replacing springs 13 with different spring constants. The greater the spring constant of the spring 13, the greater the pressure of the pressing rod 323 on the plate 4.

[0028] Two positioning shafts are fixed to the side of the second fixing plate 32 close to the third fixing plate 33. The positioning shafts pass through the third fixing plate 33 and can slide relative to the third fixing plate 33. The function of setting the positioning shafts is to make the structures of the third fixing plate 33 and the second fixing plate 32 more stable during the relative movement and the transmission through the pressing rod 323.

[0029] In some embodiments, such as Figure 3As shown in the figure, the horizontal fixing device includes two sets of clamping devices arranged on the first fixing plate 31. The clamping device includes a first screw 315 and a clamping plate 311. A second sliding groove is formed on one side of the first fixing plate 31 facing the second fixing plate 32. The second sliding groove communicates with the two end surfaces of the second fixing plate 32. The first screw 315 is rotatably connected to the end of the second sliding groove through a bearing, and the length direction of the first screw 315 is parallel to the length direction of the second sliding groove. One end of the clamping plate 311 close to the second sliding groove is fixed with a slider 312. The slider 312 is threadedly connected to the first screw 315. The clamping plate 311 is located between the first fixing plate 31 and the second fixing plate 32. The lower surface of the clamping plate 311 is closely attached to the upper surface of the cutting bed 1, and the side surface of the clamping plate 311 is closely attached to the surface of the first fixing plate 31. A rotating device for driving the first screw 315 to rotate is further installed on the first screw 315. The rotating device is located outside the second sliding groove. The rotating device includes a rotating disk 316 fixed to the end of the first screw 315 and coaxially arranged with the first screw 315. A number of positioning holes 3161 are formed on the rotating disk 316 at equal distances around the center of the rotating disk 316. A threaded hole matching the positioning hole 3161 is formed at one end of the first fixing plate 31 close to the rotating disk 316. A second screw is inserted into the threaded hole and one of the positioning holes 3161. The second screw is threadedly connected to the threaded hole. One end of the second screw extends out of the positioning hole 3161 and is fixed with a screw head 3162. The screw head 3162 has a hexagonal wrench surface, which is convenient for using a wrench or directly screwing the second screw into the threaded hole by hand.

[0030] Rotating the rotating disk 316 drives the first screw 315 to rotate, thereby driving the slider 312 to move on the first screw 315 and in the sliding groove, and then driving the clamping plate 311 to move. After driving the slider 312 to move to a suitable position, insert the second screw into the aligned threaded hole and positioning hole 3161 to position the rotating disk, thereby positioning the clamping plate 311. The clamping plates 311 of the two sets of clamping devices can be adjusted to be closer or farther away from each other, so as to clamp or release the plate 4. At the same time, the relative positions of the two clamping devices and the cutting bed 1 can be controlled respectively, so as to adjust the relative position of the plate 4 and the blade 21 of the cutting machine 2 on the cutting bed 1, so as to control the size of the plate 4 cut by the cutting machine 2.

[0031] The clamping plates 311 of the two sets of clamping devices are arranged in parallel, and a reinforcing plate 313 is fixed at the lower end of the opposite side surfaces of the clamping plate 311 to increase the contact area between the clamping plate 311 and the cutting bed 1, so that the structure of the clamping plate 311 is more stable. A reinforcing rib 314 is arranged between the reinforcing plate 313 and the clamping plate 311 to improve the structural strength between the clamping plate 311 and the reinforcing plate 313, making it more firm and stable when clamping both sides of the plate.

[0032] As Figure 3As shown, the upper edges of the two clamping plates on the opposite side are chamfered. When the plate 4 of the same size is continuously cut, it is only necessary to adjust the distance between the clamping plates 311 once according to the width of the plate 4. Then, during batch processing, it is only necessary to insert the plate 4 between the two clamping plates 311 at the upper right corner. The purpose of the chamfer is to make the insertion of the plate 4 between the clamping plates 311 smoother.

[0033] From the above, it can be seen that the technical principle of the utility model is as follows:

[0034] The plate 4 is placed on the cutting bed 1, and the rotating disk 316 is rotated to adjust the clamping plate 311 to move and clamp both sides of the plate. Then, the rotating disk 316 is locked with the second screw. At this time, the plate 4 is located between the second fixing plate 32 and the first fixing plate 31, and the first fixing plate 31 is pushed, so that the plate 4 is pushed toward the second fixing plate 32, and finally the plate 4 is clamped between the first fixing plate 31 and the second fixing plate 32, and the first fixing plate 31 is continuously pushed to push the second fixing plate 22 toward the third fixing plate 33; in the process of the second fixing plate 22 moving toward the third fixing plate 33, the upper end of the third fixing plate 33 pushes the clamping rod 323 to flip, so that the lower end of the clamping rod 323 rotates and presses on the upper surface of the plate 4, and the plate 4 is pressed against the surface of the cutting bed 1, and the first fixing plate 31 is continuously pushed, so that the third fixing plate 33 can be pushed to overcome the elastic force of the spring 13 and slide on the cutting bed 1, so that the plate 4 can be driven to slide on the cutting bed 1, so that the plate 4 is cut by the blade 21 of the cutting machine 2;

[0035] After the cutting is completed (the blade 21 of the cutting machine 2 cannot be completely separated from the plate 4), the cutting machine 2 is turned off, the pressure applied to the first fixed plate 31 is released, the spring 13 pushes the third fixed plate 33 in reverse, and then through a series of transmissions, the plate 4 cut into two pieces is pushed toward the first fixed plate 31, thereby pushing the plate 4 to its original position, removing the cut plate 4, and then placing the next piece.

[0036] In actual work, the first fixing plate 31 can be pushed manually by an operator, or a cylinder can be fixed on the back of the first fixing plate 31 , and the cylinder body is fixed on the machine tool, and the first fixing plate 31 is pushed and pulled by the cylinder.

[0037] The above is only an embodiment of the utility model, and the common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the utility model, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A plate cutting device, comprising a cutting bed, a cutting machine for cutting the plate installed on the cutting bed, and a fixing device for fixing the plate slidably connected to the cutting bed, characterized in that: The fixing device comprises an axial fixing device for clamping the plate at both ends, a transverse fixing device for clamping the plate at both sides is installed on the axial fixing device, and a longitudinal fixing device for longitudinally pressing the upper surface of the plate is also installed on the axial fixing device.

2. A plate cutting device according to claim 1, characterized in that: A strip groove is provided in the middle of the cutting bed, a cutting machine is installed on the cutting bed, and a blade of the cutting machine is inserted into the strip groove from the bottom of the cutting bed and extends to the top of the cutting bed.

3. A plate cutting device according to claim 2, characterized in that: The upper surface of the cutting bed is also provided with two first slide grooves on both sides of the strip groove, and the length direction of the first slide grooves is parallel to the length direction of the strip groove, and a slide rod is fixed in the first slide groove along the upper side of the length of the first slide groove; the axial fixing device includes a butt device and a first fixed plate; rectangular blocks matching the first slide groove and slidable in the first slide groove are fixed on the lower surface of the butt device and the first fixed plate, and the slide rod passes through all the rectangular blocks in the corresponding first slide groove; a spring is arranged between the rectangular block on the butt device and the end of the first slide groove, and the two ends of the spring are respectively fixedly connected to the end of the first slide groove and the fixed block on the butt device.

4. A plate cutting device according to claim 3, characterized in that: The abutment device includes a second fixed plate and a third fixed plate which can slide on the cutting bed; the lower ends of the second fixed plate and the third fixed plate are fixed with rectangular blocks inserted into and sliding in the first slide groove, and the sliding rod in the first slide groove passes through the middle of the rectangular block; the height of the third fixed plate is greater than the height of the second fixed plate; the second fixed plate is located between the third fixed plate and the first fixed plate, and the second fixed plate is in contact with the plate; the longitudinal fixing device is installed on the upper end of the second fixed plate, and the longitudinal fixing device includes at least two groups of clamping devices, and the clamping device includes two connecting plates fixed to the upper end of the second fixed plate, and the two connecting plates are rotatably connected with a rotating shaft, and a clamping rod is fixedly connected to the rotating shaft, and the lower surface of the clamping rod is always in contact with the edge of the upper end of the third fixed plate, and the lower end of the clamping rod is in contact with the upper surface of the plate.

5. A plate cutting device according to claim 4, characterized in that: The lateral fixing device includes two sets of clamping devices arranged on the first fixing plate, and the clamping device includes a first screw and a clamping plate, a second slide groove is opened on the side of the first fixing plate facing the second fixing plate, the second slide groove is connected to the two end surfaces of the second fixing plate, the first screw is rotatably connected to the end of the second slide groove and the length direction of the first screw is parallel to the length direction of the second slide groove, the clamping plate is located between the first fixing plate and the second fixing plate and is perpendicular to the surface of the first fixing plate, a slider is fixed on the end of the clamping plate close to the second slide groove, the slider is threadedly connected to the first screw, the lower surface of the clamping plate is close to the upper surface of the cutting bed, and the side surface of the clamping plate is close to the surface of the first fixing plate; a rotating device for driving the first screw to rotate is also installed on the first screw, and the rotating device is located outside the second slide groove.

6. A plate cutting device according to claim 5, characterized in that: The rotating device includes a rotating disk fixed to the end of the first screw and coaxially arranged with the first screw, and the rotating disk is provided with a plurality of positioning holes equidistantly arranged around the center of the rotating disk; a threaded hole matching the positioning hole is provided on one end of the first fixing plate close to the rotating disk, a second screw is inserted into the threaded hole and one of the positioning holes, the second screw is threadedly connected to the threaded hole, and one end of the second screw extends out of the positioning hole and is fixed with a screw head.

7. A plate cutting device according to claim 6, characterized in that: The clamping plates of the two sets of clamping devices are arranged in parallel, and reinforcing plates are fixed to the lower ends of the opposite sides of the clamping plates, and reinforcing ribs are arranged between the reinforcing plates and the clamping plates.

8. A plate cutting device according to claim 7, characterized in that: The upper edges of the two clamping plates on opposite sides are chamfered.

9. A plate cutting device according to claim 8, characterized in that: The first fixing plate, the second fixing plate and the third fixing plate are provided with hollow openings for accommodating the cutting machine blade to pass through.

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