Blade thickness flattening equipment
By combining a motor-driven turntable and a hydraulic cylinder with a limiting and buffering structure, the blades are pressed twice, solving the problem of springback after a single pressing, improving pressing accuracy and equipment stability, and extending service life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-12
- Publication Date
- 2026-04-03
AI Technical Summary
Existing blade thickness flattening devices are prone to springing back after a single pressing, and multiple pressings require a costly hydraulic device with pressure regulation capabilities.
Design a blade thickness flattening device. The device uses a motor to drive a turntable to rotate, causing the blade to be pressed twice between a first hydraulic cylinder and a second hydraulic cylinder. The movement of the turntable and the pressure plate is stabilized by a limiting structure and a buffer spring to ensure pressing accuracy and stability.
It effectively solved the blade springback problem, improved pressing accuracy and equipment stability, extended service life, and reduced maintenance requirements.
Smart Images
Figure CN224073050U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of blade thickness flattening technology, specifically a blade thickness flattening device. Background Technology
[0002] A blade is a piece of a knife, weapon, or machine whose edge is designed to pierce, cut, or scrape the surface of a material. Blades can be made of materials such as flint, metal, ceramic, or others. Blades are one of the oldest tools ever made by humankind and have been used in combat, food preparation, and other purposes. In mechanical engineering terminology, a blade often refers to a sheet-like part mounted on a machine for cutting.
[0003] In existing blade thickness flattening devices, if the blade is only pressed once, the stress process on the blade is generally short. After pressing, the shape of the blade is prone to springing back. If the blade is flattened multiple times by a single hydraulic device, the hydraulic device needs to have pressure adjustment capability to achieve a better flattening effect, which is costly.
[0004] Therefore, this utility model provides a blade thickness flattening device. Utility Model Content
[0005] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.
[0006] The technical solution adopted by this utility model to solve its technical problem is as follows: A blade thickness flattening device of this utility model includes a worktable. A fixed support is fixedly connected to the top of the worktable, and a first hydraulic cylinder and a second hydraulic cylinder are fixedly connected to the top of the fixed support. Pressure plates are fixedly connected to the output ends of the first and second hydraulic cylinders, respectively. A turntable is rotatably connected to the top of the worktable, and a transmission gear is fixedly connected to the bottom of the turntable. A placement platform is provided on the top of the turntable, and multiple placement platforms are arranged in a circular array. A motor is fixedly connected to the top of the worktable. A drive gear is provided at the output end of the motor, and the drive gear is positioned corresponding to the transmission gear. Through the above structure, the motor causes the turntable to rotate, thereby causing the placement platform containing the blade to pass through the first and second hydraulic cylinders, achieving two-stage pressing of the blade. This helps to solve the springback problem of single-stage blade pressing and improves the pressing accuracy of the blade.
[0007] Preferably, the turntable has an L-shaped limiting groove on its side wall, and four L-shaped limiting grooves are arranged in a circular array; a U-shaped frame is fixedly connected to the side wall of the fixed bracket; a third hydraulic cylinder is fixedly connected to the side wall of the U-shaped frame, and a limiting block is fixedly connected to the output end of the third hydraulic cylinder; an H-shaped limiting groove is formed on the side wall of the fixed bracket, and the H-shaped limiting groove is sized to correspond to the limiting block; a locking block is fixedly connected to the side wall of the limiting block, and the locking block is sized to correspond to the L-shaped limiting groove; the limiting... A first limiting rod is fixed to the side wall of the block, and multiple first limiting rods are arranged correspondingly, with the first limiting rods slidably connected to the U-shaped frame. Through the above structure, a third hydraulic cylinder is set to control the position of the locking block, so that the locking block contacts the inside of the L-shaped limiting groove, thereby preventing the turntable from shifting under inertia. An H-shaped limiting groove, a limiting block, and the first limiting rod are set to limit the limiting block, thereby preventing the locking block from tilting during movement, improving the stability of the equipment, and helping to extend the service life of the equipment.
[0008] Preferably, a second limiting rod is fixedly connected to the bottom of the placement platform, and multiple second limiting rods are arranged correspondingly; a buffer spring is fixedly connected between the placement platform and the turntable, and multiple buffer springs are arranged corresponding to the positions of the second limiting rods; through the above structure, the buffer springs buffer the force on the blade, which helps to prolong the force-bearing process of the blade, thereby making the pressure deformation of the blade more stable; the second limiting rods, which are slidably connected to the turntable, position the placement platform, thereby preventing the placement platform from shifting during the pressure process and improving the stability of the device.
[0009] Preferably, a fixing protrusion is fixedly connected to the side wall of the fixed bracket, and the two fixing protrusions are respectively positioned corresponding to the positions of the first hydraulic cylinder and the second hydraulic cylinder; a third limiting rod is fixedly connected to the top of the pressure plate, the two third limiting rods are correspondingly arranged, and the two third limiting rods are slidably connected to the fixing protrusions; through the above structure, the fixing protrusions and the third limiting rods restrict the movement posture and direction of the pressure plate, thereby preventing the pressure plate from tilting during movement and pressing, which is beneficial to improving the processing accuracy of the equipment, extending the service life of the equipment, and reducing maintenance requirements.
[0010] Preferably, a reinforcing block is fixed to the side wall of the fixed bracket, and multiple reinforcing blocks are arranged in a linear array. Through the above structure, the reinforcing blocks transmit the internal stress of the fixed bracket, which enhances the overall structural integrity of the fixed bracket, helps to avoid large deformation of the fixed bracket during the pressing of the blade in the equipment, and helps to extend the service life of the equipment.
[0011] Preferably, a support column is fixedly connected to the bottom of the workbench, and multiple support columns are arranged in a corresponding manner; an adjusting pad is threadedly connected to the bottom of the support column; through the above structure, by setting the support column and the adjusting pad and by using the threaded connection between the two, the contact relationship between the equipment and the ground is optimized, which helps to reduce equipment shaking and reduce interference during the pressure process of the blade.
[0012] Preferably, a protective shell is fixed to the bottom of the workbench, and the position and size of the protective shell are set corresponding to the transmission gear and the drive gear. Through the above, the protective shell protects the transmission gear and the drive gear, avoids external contact from affecting their operation, and reduces the risk of accidental contact by the staff.
[0013] The beneficial effects of this utility model are as follows:
[0014] 1. The blade thickness flattening device of this utility model uses a motor to rotate a turntable, so that the placement table on which the blade is placed passes through a first hydraulic cylinder and a second hydraulic cylinder respectively, realizing the two-stage pressing of the blade. This helps to solve the springback problem of single pressing of the blade and improves the pressing accuracy of the blade.
[0015] 2. The blade thickness flattening device of this utility model controls the position of the locking block by setting a third hydraulic cylinder, so that the locking block contacts the inside of the L-shaped limiting groove, thereby preventing the turntable from shifting under inertia. The H-shaped limiting groove, the limiting block and the first limiting rod limit the limiting block, thereby preventing the locking block from tilting during the movement, improving the stability of the device and helping to extend the service life of the device. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.
[0017] Figure 1 This is a perspective view of the present invention;
[0018] Figure 2 This is a schematic diagram of the protective shell structure in this utility model;
[0019] Figure 3 This is a schematic diagram of the U-shaped frame in this utility model;
[0020] Figure 4 This is a schematic diagram of the structure of the fixed bracket in this utility model;
[0021] Figure 5This is a schematic diagram of the structure of the adjusting pad in this utility model;
[0022] Figure 6 This is a schematic diagram of the transmission gear in this utility model.
[0023] Explanation of reference numerals in the attached figures:
[0024] 1. Workbench; 11. Fixed bracket; 12. First hydraulic cylinder; 13. Second hydraulic cylinder; 14. Turntable; 15. Placement platform; 16. Transmission gear; 17. Motor; 18. Drive gear; 19. Pressure plate; 2. L-shaped limiting groove; 21. U-shaped frame; 22. Third hydraulic cylinder; 23. H-shaped limiting groove; 24. Limiting block; 25. Locking block; 26. First limiting rod; 3. Second limiting rod; 31. Buffer spring; 4. Fixed protrusion; 41. Third limiting rod; 5. Reinforcing block; 6. Support column; 61. Adjusting pad; 7. Protective shell. Detailed Implementation
[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.
[0026] Specific implementation examples are given below.
[0027] like Figures 1 to 6As shown, an embodiment of the present invention provides a blade thickness flattening device, comprising a worktable 1, a fixed support 11 fixedly connected to the top of the worktable 1, a first hydraulic cylinder 12 and a second hydraulic cylinder 13 fixedly connected to the top of the fixed support 11, and pressure plates 19 fixedly connected to the output ends of the first hydraulic cylinder 12 and the second hydraulic cylinder 13 respectively; a turntable 14 rotatably connected to the top of the worktable 1, and a transmission gear 16 fixedly connected to the bottom of the turntable 14; a placement platform 15 is provided on the top of the turntable 14, and multiple placement platforms 15 are arranged in a circumferential array; a motor 17 is fixedly connected to the top of the worktable 1; a drive gear 18 is provided at the output end of the motor 17, and the drive gear 18 is positioned corresponding to the transmission gear 16; during operation, the operator can place the blade to be flattened inside the placement platform 15, and drive the motor 17 to cause the placement platform 15 containing the blade to pass through the first hydraulic cylinder 19 fixed to the top of the fixed support 11. The blade is flattened by a pressure plate 19 fixed to the output ends of the first hydraulic cylinder 12 and the second hydraulic cylinder 13 at the bottom of the second hydraulic cylinder 13. During the process, whenever the motor 17 fixed to the top of the worktable 1 is driven, the drive gear 18 fixed to the output end of the motor 17 will rotate. Since the drive gear 18 and the transmission gear 16 have a partial meshing relationship, for every rotation of the drive gear 18, the transmission gear 16 and the turntable 14 will rotate a quarter rotation synchronously. Whenever the first hydraulic cylinder 12 and the second hydraulic cylinder 13 output, the pressure plate 19 will cooperate with the placement table 15 to press the blade. Through the above structure, the motor 17 causes the turntable 14 to rotate, so that the placement table 15 with the blade is passed through the first hydraulic cylinder 12 and the second hydraulic cylinder 13 respectively, realizing the two-time pressing of the blade. This helps to solve the problem of the blade springback during single pressing and improves the pressing accuracy of the blade.
[0028] like Figures 2 to 4As shown, the turntable 14 has L-shaped limiting grooves 2 on its side wall, and four L-shaped limiting grooves 2 are arranged in a circular array; a U-shaped frame 21 is fixedly connected to the side wall of the fixed bracket 11; a third hydraulic cylinder 22 is fixedly connected to the side wall of the U-shaped frame 21, and a limiting block 24 is fixedly connected to the output end of the third hydraulic cylinder 22; an H-shaped limiting groove 23 is opened on the side wall of the fixed bracket 11, and the size of the H-shaped limiting groove 23 corresponds to that of the limiting block 24; a locking block 25 is fixedly connected to the side wall of the limiting block 24, and the locking block 25 corresponds to the L-shaped limiting groove 2. Size setting; a first limiting rod 26 is fixedly connected to the side wall of the limiting block 24, and multiple first limiting rods 26 are arranged correspondingly, and the first limiting rods 26 are slidably connected to the U-shaped frame 21; during operation, whenever the corresponding placement platform 15 rotates to the predetermined position, this setting can drive the third hydraulic cylinder 22 to make the locking block 25 contact the side wall of the L-shaped limiting groove 2, thereby preventing the turntable 14 from being displaced under inertia. During the process, whenever the third hydraulic cylinder 22 fixed to the side wall of the U-shaped frame 21 outputs, the locking block 25 is fixedly connected to the side wall of the L-shaped limiting groove 2. The limiting block 24 connected to the output end of the third hydraulic cylinder 22 will move under the restriction of the H-shaped limiting groove 23. At this time, since the locking block 25 fixed to the side wall of the limiting block 24 corresponds to the size of the L-shaped limiting groove 2 and the structure of the L-shaped limiting groove 2 is L-shaped, the locking block 25 can slowly enter the interior of the turntable 14 and contact the deepest part of the L-shaped limiting groove 2 when the placement table 15 moves to the predetermined position, forcing the turntable 14 and the placement table 15 to stop moving. Among them, the locking block 24 is fixed to the side wall of the limiting block 24 and is slidably connected to the U-shaped frame 21. The first limiting rod 26 can limit the limiting block 24 by contacting the U-shaped frame 21. Through the above structure, the third hydraulic cylinder 22 controls the position of the locking block 25, so that the locking block 25 contacts the inside of the L-shaped limiting groove 2, thereby preventing the turntable 14 from shifting under inertia. The H-shaped limiting groove 23, the limiting block 24 and the first limiting rod 26 limit the limiting block 24, thereby preventing the locking block 25 from tilting during movement, improving the stability of the equipment and helping to extend the service life of the equipment.
[0029] like Figure 6As shown, a second limiting rod 3 is fixedly connected to the bottom of the placement platform 15, and multiple second limiting rods 3 are arranged correspondingly. A buffer spring 31 is fixedly connected between the placement platform 15 and the turntable 14, and multiple buffer springs 31 are arranged corresponding to the positions of the second limiting rods 3. During operation, whenever the pressure plate 19 closes with the placement platform 15, multiple buffer springs 31 fixed between the placement platform 15 and the worktable 1 can use their own elasticity to buffer the force during the process, preventing the blade placed between them from being subjected to excessive force. Whenever multiple buffer springs 31 are compressed, multiple second limiting rods 3 that are slidably connected to the turntable 14 can limit the placement platform 15, preventing the placement platform 15 from shifting. Through the above structure, the buffer springs 31 buffer the force on the blade, which helps to prolong the force process of the blade, thereby making the pressure deformation of the blade more stable. The second limiting rods 3 that are slidably connected to the turntable 14 position the placement platform 15, thereby preventing the placement platform 15 from shifting during the pressure process and improving the stability of the equipment.
[0030] like Figure 4 As shown, a fixing protrusion 4 is fixedly connected to the side wall of the fixed bracket 11, and the two fixing protrusions 4 are respectively positioned corresponding to the positions of the first hydraulic cylinder 12 and the second hydraulic cylinder 13; a third limiting rod 41 is fixedly connected to the top of the pressure plate 19, and the two third limiting rods 41 are correspondingly arranged and are slidably connected to the fixing protrusions 4; during operation, whenever the first hydraulic cylinder 12 and the second hydraulic cylinder 13 are driven, and the pressure plate 19 fixed to its output end moves, the third limiting rod 41 fixed to the top of the pressure plate 19 and slidably connected to the fixing protrusions 4 is always in contact with the interior of the corresponding fixing protrusions 4. The third limiting rod 41 can restrict the movement of the pressure plate 19 by contacting the fixing protrusions 4, thus preventing it from tilting; through the above structure, the fixing protrusions 4 and the third limiting rods 41 restrict the movement posture and direction of the pressure plate 19, thereby preventing the pressure plate 19 from tilting during movement and pressing, which is beneficial to improving the processing accuracy of the equipment, extending the service life of the equipment, and reducing maintenance requirements.
[0031] like Figure 4 As shown, reinforcing blocks 5 are fixedly connected to the side wall of the fixed bracket 11, and multiple reinforcing blocks 5 are arranged in a linear array. During operation, the multiple reinforcing blocks 5 fixed to the side wall of the fixed bracket 11 can transmit the internal stress of the fixed bracket 11 through themselves, thereby enhancing the structural stability of the fixed bracket 11. Through the above structure, the reinforcing blocks 5 transmit the internal stress of the fixed bracket 11, enhancing the overall structural integrity of the fixed bracket 11, which helps to avoid significant deformation of the fixed bracket 11 during the pressing of the blade in the equipment, and helps to extend the service life of the equipment.
[0032] like Figure 5As shown, a support column 6 is fixedly connected to the bottom of the workbench 1, and multiple support columns 6 are arranged in a corresponding manner; an adjusting pad 61 is threadedly connected to the bottom of the support column 6; during operation, the multiple support columns 6 fixed to the bottom of the workbench 1 provide support, and at the same time, the operator can adjust the total length of the support column 6 and the adjusting pad 61 by means of the threaded connection between the adjusting pad 61 and the support column 6, thereby optimizing the contact relationship between the equipment and the ground; through the above structure, setting up the support column 6 and the adjusting pad 61 and using the threaded connection between the two to optimize the contact relationship between the equipment and the ground, it is beneficial to reduce equipment shaking and reduce interference during the pressure process of the blade.
[0033] like Figure 2 As shown, a protective shell 7 is fixed to the bottom of the workbench 1, and the protective shell 7 is set in position and size corresponding to the transmission gear 16 and the drive gear 18. During operation, the protective shell 7 fixed to the bottom of the workbench 1 encloses the transmission gear 16 and the drive gear 18 inside, thereby preventing the transmission gear 16 and the drive gear 18 from coming into contact with the outside. Through the above, the protective shell 7 protects the transmission gear 16 and the drive gear 18, preventing external contact from affecting their operation, and reducing the risk of accidental contact by the staff.
[0034] During operation, the operator places the blades to be flattened inside the placement table 15. The placement table 15, with the blades inside, passes under the first hydraulic cylinder 12 and the second hydraulic cylinder 13, which are fixed to the top of the fixed bracket 11, via a drive motor 17. The blades are flattened by pressure plates 19 fixed to the output ends of the first and second hydraulic cylinders 12 and 13. During this process, whenever the motor 17, fixed to the top of the worktable 1, is driven, the drive gear 18, fixed to the output end of the motor 17, rotates. Because the drive gear 18 and the transmission gear 16 have a partial meshing relationship, for each rotation of the drive gear 18, the transmission gear 16 and the turntable 14 will... The first hydraulic cylinder 12 rotates a quarter turn, and whenever the first hydraulic cylinder 12 and the second hydraulic cylinder 13 output, the pressure plate 19 will cooperate with the placement table 15 to press the blade. Whenever the corresponding placement table 15 rotates to the predetermined position, this setting can drive the third hydraulic cylinder 22 to make the locking block 25 contact the side wall of the L-shaped limiting groove 2, thereby preventing the turntable 14 from being displaced under inertia. During the process, whenever the third hydraulic cylinder 22 fixed to the side wall of the U-shaped frame 21 outputs, the limiting block 24 fixed to the output end of the third hydraulic cylinder 22 will move under the restriction of the H-shaped limiting groove 23. At this time, since the locking block 25 fixed to the side wall of the limiting block 24 corresponds to the L-shaped limiting groove 23, the locking block 25 is in contact with the side wall of the limiting block 24. The size of the slot 2 is set, and the structure of the L-shaped limiting slot 2 is L-shaped. The locking block 25 can slowly enter the interior of the turntable 14 and contact the deepest part of the L-shaped limiting slot 2 when the placement table 15 moves to the predetermined position, forcing the turntable 14 and the placement table 15 to stop moving. The first limiting rod 26, which is fixed to the side wall of the limiting block 24 and is slidably connected to the U-shaped frame 21, can limit the limiting block 24 by contacting the U-shaped frame 21. Whenever the pressure plate 19 closes with the placement table 15, the multiple buffer springs 31 fixed between the placement table 15 and the worktable 1 can buffer the force of the process by their own elasticity, so as to prevent the blade placed between the two from being subjected to excessive force. In this situation, whenever multiple buffer springs 31 are compressed, multiple second limiting rods 3 that are slidably connected to the turntable 14 can limit the placement platform 15 to prevent the placement platform 15 from shifting. Whenever the first hydraulic cylinder 12 and the second hydraulic cylinder 13 are driven and the pressure plate 19 fixed to its output end moves, the third limiting rod 41 fixed to the top of the pressure plate 19 and slidably connected to the fixed protrusion 4 is always in contact with the interior of the corresponding fixed protrusion 4. The third limiting rod 41 can limit the movement of the pressure plate 19 by contacting the fixed protrusion 4 to prevent it from tilting. Multiple reinforcing blocks 5 fixed to the side wall of the fixed bracket 11 can transmit the internal stress of the fixed bracket 11 through themselves.To enhance the structural stability of the fixed bracket 11, multiple support columns 6 fixed to the bottom of the workbench 1 provide support. At the same time, the operator can adjust the total length of the support column 6 and the adjustment pad 61 by adjusting the threaded connection between the pad 61 and the support column 6, thereby optimizing the contact relationship between the equipment and the ground. The protective shell 7 fixed to the bottom of the workbench 1 encloses the transmission gear 16 and the drive gear 18 inside, thereby preventing the transmission gear 16 and the drive gear 18 from coming into contact with the outside.
[0035] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A blade thickness flattening device, comprising a worktable (1), characterized in that: The top of the workbench (1) is fixedly connected to a fixed bracket (11), and the top of the fixed bracket (11) is fixedly connected to a first hydraulic cylinder (12) and a second hydraulic cylinder (13), and the output ends of the first hydraulic cylinder (12) and the second hydraulic cylinder (13) are respectively fixedly connected to pressure plates (19); the top of the workbench (1) is rotatably connected to a turntable (14), and the bottom of the turntable (14) is fixedly connected to a transmission gear (16); the top of the turntable (14) is provided with a placement platform (15), and multiple placement platforms (15) are arranged in a circular array; the top of the workbench (1) is fixedly connected to a motor (17); the output end of the motor (17) is provided with a drive gear (18), and the drive gear (18) is positioned corresponding to the position of the transmission gear (16).
2. The blade thickness flattening device according to claim 1, characterized in that: The turntable (14) has an L-shaped limiting groove (2) on its side wall, and the four L-shaped limiting grooves (2) are arranged in a circular array; a U-shaped frame (21) is fixedly connected to the side wall of the fixed bracket (11); a third hydraulic cylinder (22) is fixedly connected to the side wall of the U-shaped frame (21), and a limiting block (24) is fixedly connected to the output end of the third hydraulic cylinder (22); an H-shaped limiting groove (23) is provided on the side wall of the fixed bracket (11). The H-shaped limiting groove (23) corresponds to the size setting of the limiting block (24); a locking block (25) is fixedly connected to the side wall of the limiting block (24), and the locking block (25) corresponds to the size setting of the L-shaped limiting groove (2); a first limiting rod (26) is fixedly connected to the side wall of the limiting block (24), and multiple first limiting rods (26) are arranged in a corresponding manner, and the first limiting rods (26) are slidably connected to the U-shaped frame (21).
3. The blade thickness flattening device according to claim 1, characterized in that: The bottom of the placement platform (15) is fixedly connected to a second limiting rod (3), and multiple second limiting rods (3) are arranged in a corresponding manner; a buffer spring (31) is fixedly connected between the placement platform (15) and the turntable (14), and multiple buffer springs (31) are arranged at positions corresponding to the second limiting rods (3).
4. The blade thickness flattening device according to claim 1, characterized in that: The fixed bracket (11) has a fixed protrusion (4) fixedly connected to its side wall, and the two fixed protrusions (4) are respectively positioned corresponding to the positions of the first hydraulic cylinder (12) and the second hydraulic cylinder (13); the top of the pressure plate (19) is fixedly connected to a third limiting rod (41), the two third limiting rods (41) are respectively positioned correspondingly, and the two third limiting rods (41) are respectively slidably connected to the fixed protrusion (4).
5. The blade thickness flattening device according to claim 4, characterized in that: A reinforcing block (5) is fixed to the side wall of the fixed bracket (11), and multiple reinforcing blocks (5) are arranged in a linear array.
6. The blade thickness flattening device according to claim 1, characterized in that: The bottom of the workbench (1) is fixedly connected to a support column (6), and multiple support columns (6) are arranged in a corresponding manner; the bottom of the support column (6) is threadedly connected to an adjusting pad (61).
7. The blade thickness flattening device according to claim 6, characterized in that: The bottom of the workbench (1) is fixed with a protective shell (7), and the protective shell (7) is set in position and size corresponding to the transmission gear (16) and the drive gear (18).