Reaction sintering silicon carbide grinding barrel

Abstract

The invention discloses a reactive sintering silicon carbide grinding barrel and relates to the technical field of grinding equipment, the reactive sintering silicon carbide grinding barrel comprises an outer barrel, an inner barrel internally provided with grinding teeth is placed in the outer barrel, a fixing sleeve is fixed to the bottom of the outer barrel, and strip-shaped frames are fixed to the periphery of an inner cavity of the outer barrel; a plurality of sets of clamping plates clamped with the strip-shaped frame for use are evenly fixed to the surface of the inner barrel, an auxiliary positioning assembly matched with the inner barrel for use is arranged in the fixing sleeve and comprises a sliding frame inserted in the center of the bottom of the outer barrel, and the top of the sliding frame is attached to the bottom of the inner barrel. A multi-point multi-position automatic adsorption fixing mode is adopted, clamping connection of the strip-shaped frame and the clamping plate is matched, the inner cylinder can be limited in multiple positions, the stability of the inner cylinder during installation is effectively guaranteed, the whole installation mode is simple and convenient, only the inner cylinder needs to be pressed downwards, and convenience of the whole installation process is effectively guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of grinding equipment, in particular to a reaction-sintered silicon carbide grinding barrel. Background Art

[0002] The grinding barrel is a type of grinding equipment widely used in the manufacturing industry. It grinds the workpiece surface through high-speed rotating grinding media. It is mainly used for grinding various metals, non-metallic materials, etc. It has a wide range of application scenarios. Among them, the reaction-sintered silicon carbide grinding barrel is also a type of grinding barrel.

[0003] Patent publication number CN218834770U discloses a reaction-sintered silicon carbide grinding barrel, comprising an outer barrel, an inner barrel within the outer barrel, and a plurality of grinding teeth disposed on the inner wall of the inner barrel. A support ring is fixedly mounted on the inner bottom wall of the outer barrel, and a reinforcement member is provided on the outer wall of the inner barrel. A propeller extending into the interior of the outer barrel is fixedly mounted on the bottom of the outer barrel. The reinforcement member includes transition blocks fixedly mounted on the left and right sides of the inner barrel, each of which has a handle fixedly mounted on its other end. Reinforcement blocks are fixedly mounted on the front and back sides of the inner barrel. This reaction-sintered silicon carbide grinding barrel utilizes support rings to provide bottom support for the inner barrel, significantly alleviating pressure on the propeller. Even when the inner barrel is fully loaded, its gravity acts on the support rings, preventing instability of the inner barrel during grinding. Furthermore, the transition blocks and reinforcement blocks provide a tighter connection between the inner barrel and the outer barrel, further enhancing the stability of the inner barrel during grinding.

[0004] However, the above device still has the following problems during implementation:

[0005] When positioning the inner cylinder, a method of direct rotation clamping and then two-point positioning is adopted. Only these two positioning points play a real fixing role. It is impossible to perform multi-directional clamping and positioning of the inner cylinder when installing it, and it is impossible to automatically adsorb and fix the inner cylinder after positioning. This directly leads to poor fixing effect of the inner cylinder. There will be a large rotational force when the inner cylinder follows the rotation, which can easily cause the positioning points at both ends to break, posing a great safety hazard and a very high failure rate. It cannot be used in a grinding barrel. For this reason, a reaction-sintered silicon carbide grinding barrel is proposed. Summary of the Invention

[0006] The purpose of the present invention is to provide a reaction-sintered silicon carbide grinding barrel to solve the problems raised in the above background technology that the inner barrel cannot be positioned in multiple directions when it is installed, and the inner barrel cannot be automatically adsorbed and fixed after positioning.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a reaction-sintered silicon carbide grinding barrel, comprising an outer cylinder, an inner cylinder with grinding teeth placed inside the outer cylinder, a fixing sleeve fixed to the bottom of the outer cylinder, strip frames fixed around the inner cavity of the outer cylinder, a plurality of groups of clamping plates for clamping with the strip frames evenly fixed on the surface of the inner cylinder, and an auxiliary positioning component for use with the inner cylinder provided in the fixing sleeve.

[0008] Preferably, the auxiliary positioning assembly includes a sliding frame inserted at the center of the bottom of the outer cylinder, the top of the sliding frame is fitted to the bottom of the inner cylinder, T-shaped rods are inserted on both sides of the bottom of the sliding frame and the top of the T-shaped rod is fixed to the bottom of the outer cylinder, each group of the T-shaped rods is wound with a first spring and the two ends of the first spring are fixed to the bottom of the sliding frame and the bottom of the outer cylinder, two groups of plug plates inserted on the front of the sliding frame are longitudinally inserted in the left and right directions at the top of the front of the fixed sleeve, a pull plate is fixed at one end of the two groups of plug plates away from the sliding frame, two groups of auxiliary springs are symmetrically fixed on the back of the pull plate along the left and right directions, and one end of the auxiliary spring is fixed to the fixed sleeve.

[0009] Preferably, the auxiliary positioning assembly also includes a reinforcing tube evenly inserted around the bottom of the inner cavity of the outer cylinder, the top of the reinforcing tube is connected to a vacuum suction cup and the top of the vacuum suction cup is attached to the inner cylinder, the side where the vacuum suction cups are close to each other is fixed with a docking plate and the end of the docking plate away from the vacuum suction cup is fixed on the sliding frame, the bottom end of the reinforcing tube is connected to an annular tube, and a blocking disk is fixed to the bottom of the reinforcing tube, each group of the reinforcing tubes is wound with a second spring and the two ends of the second spring are fixed to the side where the outer cylinder and the blocking disk are close to each other, a support frame is fixed on the back side of the bottom of the outer cylinder, a tooth plate is slidingly provided on the front side of the bottom of the inner cavity of the support frame, and multiple groups of teeth are fixed in sequence on the left side of the inner cavity of the sliding frame along the up and down directions, and the outer cylinder Two groups of extension plates are fixed in sequence along the front and rear directions at the bottom of the frame, and a rotating shaft is rotatably installed on the side of the extension plates close to each other, and a first gear and a second gear are fixed in sequence along the front and rear directions on the rotating shaft, the first gear and the side of the teeth close to each other are meshed, and the second gear and the side of the gear plate close to each other are meshed, and a sealing cylinder is fixed on the back side of the bottom of the inner cavity of the support frame, a piston rod is slidably provided in the sealing cylinder and one end of the piston rod passes through the sealing cylinder and is fixed to the gear plate through a fixed block, one side of the bottom of the sealing cylinder is connected to a telescopic tube and the bottom end of the telescopic tube is connected to an annular tube, a first solenoid valve is provided at the bottom of the surface of the reinforcement tube, and a branch pipe is connected to the bottom of the reinforcement tube, and a second solenoid valve is provided on the branch pipe.

[0010] Preferably, the end of the sealing cylinder away from the piston rod is connected to a transverse tube, and the end of the transverse tube away from the sealing cylinder passes through the support frame and is provided with a third solenoid valve.

[0011] Preferably, a limiting plate is fixed to the bottom of the front side of the sliding frame and is used in conjunction with a group of extension plates on the front side.

[0012] Preferably, the length of the front group of extension plates is greater than the length of the back group of extension plates.

[0013] Preferably, one end of the two groups of inserting plates close to the sliding frame is clamped with a U-shaped frame, and the top of each group of the U-shaped frame is fixed to the bottom of the outer cylinder.

[0014] Preferably, a sliding groove is provided on the front side of the bottom of the inner cavity of the support frame, a slide plate is fixed to the bottom of the tooth plate, and the bottom of the slide plate is slidably arranged in the sliding groove.

[0015] Preferably, the front of the pull plate is in an arc-shaped structure, the top of the pull plate is in contact with the bottom of the outer cylinder, and the front of the pull plate and the surface of the outer cylinder are on the same arc-shaped surface.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] In the present invention, by setting auxiliary positioning components, multiple groups of bar frames and card plates, the inner cylinder can be pre-positioned with the outer cylinder, and the multiple groups of bar frames and card plates that are evenly distributed can give the inner cylinder enough supporting force so that the inner cylinder can stably rotate with the outer cylinder, and the pressed inner cylinder will drive the sliding frame and the vacuum suction cup to move downward synchronously, and the first spring and the second spring are stretched synchronously, and the elastic rebound of the auxiliary spring can give a certain driving force to the pulling plate and the card plate, so that the card plate can be quickly inserted into the sliding frame, and the downward sliding frame and the vacuum suction cup are positioned to avoid resetting, and in the process of moving downward, the meshing of the first gear and the teeth is used, The second gear can be driven to rotate synchronously, and the positions of the tooth plate and the piston rod can be changed, so that the air in the vacuum suction cup can be quickly extracted by using the movement of the piston rod, and the reinforcement tube can be quickly closed by using the first solenoid valve, so that the inside of the vacuum suction cup can quickly maintain a negative pressure state, so that multiple groups of vacuum suction cups can be used to quickly adsorb and fix the bottom of the inner cylinder, and a multi-point and multi-position automatic adsorption and fixing method is adopted, and the bar frame and the card plate are clamped together to limit the inner cylinder in multiple places, which effectively ensures the stability of the inner cylinder during installation, and the entire installation method is simple and convenient, and only the inner cylinder needs to be pressed down, which effectively ensures the convenience of the entire installation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic structural diagram of a reaction-sintered silicon carbide grinding barrel of the present invention;

[0019] Figure 2 This is a bottom view of the structure of a reaction-sintered silicon carbide grinding barrel of the present invention;

[0020] Figure 3This is a bottom-view cross-sectional view of the structure of a reaction-sintered silicon carbide grinding barrel of the present invention;

[0021] Figure 4 for Figure 3 A magnified view of the structure at point A;

[0022] Figure 5 This is a structural cross-sectional view of the outer cylinder and the fixed sleeve of the present invention;

[0023] Figure 6 This is a partial rear cross-sectional view of the structure of a reaction-sintered silicon carbide grinding barrel of the present invention;

[0024] Figure 7 It is a partial rear cross-sectional view of the structure of the auxiliary positioning assembly of the present invention;

[0025] Figure 8 This is a partial exploded view of the structure of a reaction-sintered silicon carbide grinding barrel of the present invention.

[0026] In the figure: 1. outer cylinder; 2. fixed sleeve; 3. inner cylinder; 4. bar frame; 5. clamping plate; 6. sliding frame; 7. T-bar; 8. first spring; 9. plug-in plate; 10. pull plate; 11. auxiliary spring; 12. U-shaped frame; 13. teeth; 14. extension plate; 15. rotating shaft; 16. first gear; 17. second gear; 18. support frame; 19. tooth plate; 20. sliding groove; 21. slide plate; 22. sealing cylinder; 23. piston rod; 24. reinforcement tube; 25. vacuum suction cup; 26. blocking disk; 27. second spring; 28. annular tube; 29. ​​first solenoid valve; 30. branch pipe; 31. second solenoid valve; 32. horizontal pipe; 33. third solenoid valve; 34. telescopic tube; 35. limit plate; 36. docking plate. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] Example

[0029] See also Figures 1-8The present invention provides a technical solution: a reaction-sintered silicon carbide grinding barrel, comprising an outer cylinder 1, an inner cylinder 3 with grinding teeth placed inside the outer cylinder 1, a fixing sleeve 2 fixed to the bottom of the outer cylinder 1, and strip frames 4 fixed around the inner cavity of the outer cylinder 1. A plurality of groups of clamping plates 5 for clamping with the strip frames 4 are evenly fixed on the surface of the inner cylinder 3, and an auxiliary positioning component for use with the inner cylinder 3 is provided in the fixing sleeve 2. The auxiliary positioning component comprises a sliding frame 6 inserted at the center of the bottom of the outer cylinder 1, the top of the sliding frame 6 is attached to the bottom of the inner cylinder 3, T-shaped rods 7 are inserted on both sides of the bottom of the sliding frame 6, and the top of the T-shaped rod 7 is fixed to the bottom of the outer cylinder 1, and a first spring 8 is wound around each group of T-shaped rods 7, and the two ends of the first spring 8 are fixed to the bottom of the sliding frame 6 and the bottom of the outer cylinder 1 The top of the front of the fixed sleeve 2 is longitudinally inserted with two groups of plug plates 9 inserted in the front of the sliding frame 6 in the left and right directions. The two groups of plug plates 9 are connected to the U-shaped frame 12 at one end close to the sliding frame 6. The top of each group of U-shaped frames 12 is fixed to the bottom of the outer cylinder 1. The design of the U-shaped frame 12 can slide and limit the plug plates 9, thereby improving the stability of the plug plates 9 during movement and avoiding the inability to dock with the sockets on the sliding frame 6 due to the falling of one end of the plug plates 9. A pull plate 10 is fixed to the end of the two groups of plug plates 9 away from the sliding frame 6. The front of the pull plate 10 is an arc-shaped structure, and the top of the pull plate 10 is attached to the bottom of the outer cylinder 1. The front of the pull plate 10 and the surface of the outer cylinder 1 are on the same arc surface. The limitation of the shape and position of the pull plate 10 makes it convenient to hide the pull plate 10 and avoid The pulling plate 10 is exposed to the outside too much and is accidentally touched. Two groups of auxiliary springs 11 are symmetrically fixed to the back of the pulling plate 10 in the left and right directions, and one end of the auxiliary spring 11 is fixed to the fixed sleeve 2. The auxiliary positioning assembly also includes a reinforcing tube 24 evenly inserted around the bottom of the inner cavity of the outer cylinder 1. The top of the reinforcing tube 24 is connected to the vacuum suction cup 25, and the top of the vacuum suction cup 25 is attached to the inner cylinder 3. The side where the vacuum suction cups 25 are close to each other is fixed with a docking plate 36, and the end of the docking plate 36 away from the vacuum suction cup 25 is fixed to the sliding frame 6. The design of the docking plate 36 can form the vacuum suction cup 25 and the sliding frame 6 into an integral structure. The bottom end of the reinforcing tube 24 extends into the fixed sleeve 2 and is connected to the annular tube 28. The bottom of the reinforcing tube 24 is fixed with a blocking disk 26 and the blocking disk 26 is fixed to the bottom of the reinforcing tube 24. The disk 26 is located above the annular tube 28, and a second spring 27 is wound around each set of reinforcement tubes 24, and the two ends of the second spring 27 are fixed to the side where the outer cylinder 1 and the blocking disk 26 are close to each other. The design of the first spring 8 and the second spring 27 can utilize its elastic rebound to assist in pushing the inner cylinder 3 to move up quickly when disassembling, and utilize its elastic rebound to give the inserting plate 9 a pushing force, so that the inserting plate 9 can be more firmly connected with the sliding frame 6. A support frame 18 is fixed to the back of the bottom of the outer cylinder 1, and a tooth plate 19 is slidingly provided on the front of the bottom of the inner cavity of the support frame 18. A sliding groove 20 is provided on the front of the bottom of the inner cavity of the support frame 18. A slide plate 21 is fixed to the bottom of the tooth plate 19, and the bottom of the slide plate 21 is slidingly provided in the sliding groove 20. The design of the sliding groove 20 and the slide plate 21,The tooth plate 19 can be slidably limited, which improves the stability of the tooth plate 19 when moving and avoids deviation. A plurality of groups of teeth 13 are fixed in sequence along the up and down directions on the left side of the inner cavity of the sliding frame 6. Two groups of extension plates 14 are fixed in sequence along the front and back directions on the bottom of the outer cylinder 1. The extension plates 14 are rotated and equipped with a rotating shaft 15 on the side close to each other. The first gear 16 and the second gear 17 are fixed on the rotating shaft 15 in sequence along the front and back directions. The first gear 16 and the side of the teeth 13 close to each other are meshed, and the second gear 17 and the side of the tooth plate 19 close to each other are meshed. The bottom of the front side of the sliding frame 6 is fixed with a limiter used in conjunction with a group of extension plates 14 on the front side. The plate 35 has a length greater than that of the extension plate 14 on the front and a length greater than that of the extension plate 14 on the back. The limit plate 35 cooperates with the extension plates 14 of different lengths to limit the upward position of the sliding frame 6, thereby preventing the sliding frame 6 from colliding with the first gear 16 when moving upward and damaging the first gear 16, which can effectively ensure the normal operation of the structure. A sealing cylinder 22 is fixed to the back of the bottom of the inner cavity of the support frame 18, and a piston rod 23 is slidingly provided in the sealing cylinder 22, and one end of the piston rod 23 passes through the sealing cylinder 22 and is fixed to the tooth plate 19 through a fixing block. One side of the bottom of the sealing cylinder 22 is connected to a telescopic tube 34, and the bottom of the telescopic tube 34 is connected to the bottom of the telescopic tube 34. The end is connected to an annular tube 28, and a first solenoid valve 29 is provided at the bottom of the surface of the reinforcement tube 24. The bottom of the reinforcement tube 24 is connected to a branch pipe 30, and the branch pipe 30 is located on the side where the blocking disk 26 and the first solenoid valve 29 are close to each other. A second solenoid valve 31 is provided on the branch pipe 30. The second solenoid valve 31 can be used to control the opening and closing state of the branch pipe 30, so as to quickly release the adsorption state in the vacuum suction cup 25. By setting an auxiliary positioning component, a multi-point and multi-position automatic adsorption and fixing method is adopted, and the bar frame 4 and the card plate 5 are clamped together, the inner cylinder 3 can be limited at multiple locations, effectively ensuring the stability of the inner cylinder 3 during installation. The entire installation method is simple and convenient; simply press down on the inner cylinder 3, effectively ensuring the convenience of the entire installation process. The end of the sealing cylinder 22 away from the piston rod 23 is connected to a cross tube 32. The end of the cross tube 32 away from the sealing cylinder 22 passes through the support frame 18 and is provided with a third solenoid valve 33. By providing the cross tube 32 and the third solenoid valve 33, the gas in the sealing cylinder 22 can be quickly discharged when the piston rod 23 retracts inward. A controller is provided on the left side of the inner cavity of the fixed sleeve 2. The first solenoid valve 29, the second solenoid valve 31, and the third solenoid valve 33 are all battery-powered, avoiding the trouble of using external wires for direct power supply.

[0030] Working principle: By utilizing the elastic rebound of the auxiliary spring 11, a driving force is continuously given to the pulling plate 10 and the inserting plate 9, so that one end of the inserting plate 9 can be closely attached to the sliding frame 6 in real time. At the same time, the user places the inner cylinder 3 in the outer cylinder 1, and directly clips the card plate 5 outside the inner cylinder 3 into the bar frame 4. As the inner cylinder 3 moves downward continuously, it will contact the top of the vacuum suction cup 25 and the sliding frame 6 in advance, and the vacuum suction cup 25 and the sliding frame 6 will move downward synchronously with the downward movement of the inner cylinder 3, thereby synchronously stretching the first spring 8 and the second spring 27 until the bottom of the vacuum suction cup 25 is in contact with the inner cavity of the outer cylinder 1. The bottom of the slide 6 is in contact with the bottom. At this time, the elastic rebound of the auxiliary spring 11 can be used to drive the inserting plate 9 to be quickly inserted into the preset inserting hole on the slide 6, so that the slide 6, the docking plate 36 and the vacuum suction cup 25 can be quickly positioned to avoid resetting upward. The elastic reset force provided by the first spring 8 and the second spring 27 can make the inserting plate 9 and the slide 6 more stable. In the process of the slide 6 moving downward, with the assistance of the teeth 13, the first gear 16 can be driven to rotate, and with the cooperation of the rotating shaft 15, the second gear 17 can be driven to rotate synchronously, thereby driving the tooth plate 19 and the piston rod 23 to move synchronously. At this time, the moving piston rod 23 can quickly extract the air in the vacuum suction cup 25 and the reinforcement tube 24 into the sealing tube 22 through the annular tube 28 and the telescopic tube 34, and simultaneously open the first solenoid valve 29 to timely seal the vacuum suction cup 25 and the reinforcement tube 24 after the air is extracted, so that a negative pressure state is quickly formed inside the vacuum suction cup 25, so that multiple groups of vacuum suction cups 25 can be quickly adsorbed on the bottom of the inner tube 3, and the inner tube 3 is adsorbed and fixed. The multi-point and multi-position automatic adsorption and fixing method is adopted, and the bar frame 4 and the clamping plate 5 are clamped together, so that the inner tube 3 can be limited at multiple locations, effectively ensuring the inner The cylinder 3 is stable during installation, and the entire installation method is simple and convenient. It is only necessary to press down the inner cylinder 3, which effectively ensures the convenience of the entire installation process. If it is necessary to release the adsorption state, continue to open the second solenoid valve 31, release the closed state of the branch pipe 30, and fill air into the vacuum suction cup 25, so as to release the adsorption state of the vacuum suction cup 25 on the bottom of the inner cylinder 3. At the same time, open the third solenoid valve 33, and pull the pull plate 10 outward to release the locking state of the sliding frame 6. At this time, under the elastic rebound action of the first spring 8 and the second spring 27, the inner cylinder 3 can be quickly pushed upward from the outer cylinder 1.

[0031] However, as is well known to those skilled in the art, the working principles and wiring methods of the first solenoid valve 29, the second solenoid valve 31, the third solenoid valve 33 and the controller are commonplace, and are conventional means or common knowledge, so they will not be elaborated here. Those skilled in the art can make any selections according to their needs or convenience.

[0032] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A reaction-sintered silicon carbide grinding barrel, comprising an outer barrel (1), characterized in that: An inner cylinder (3) with grinding teeth is placed inside the outer cylinder (1), a fixing sleeve (2) is fixed to the bottom of the outer cylinder (1), strip frames (4) are fixed around the inner cavity of the outer cylinder (1), multiple groups of clamping plates (5) for clamping with the strip frames (4) are evenly fixed on the surface of the inner cylinder (3), and an auxiliary positioning component for use with the inner cylinder (3) is provided in the fixing sleeve (2).

2. A reaction-bonded silicon carbide grinding barrel according to claim 1, characterized in that: The auxiliary positioning assembly comprises a sliding frame (6) inserted at the center of the bottom of the outer cylinder (1), the top of the sliding frame (6) is fitted on the bottom of the inner cylinder (3), T-shaped rods (7) are inserted on both sides of the bottom of the sliding frame (6), and the top ends of the T-shaped rods (7) are fixed to the bottom of the outer cylinder (1), each group of the T-shaped rods (7) is wound with a first spring (8), and the two ends of the first spring (8) are fixed to the bottom of the sliding frame (6) and the bottom of the outer cylinder (1), the top of the front of the fixed sleeve (2) is longitudinally inserted with two groups of plugging plates (9) inserted on the front of the sliding frame (6), and the ends of the two groups of plugging plates (9) away from the sliding frame (6) are fixed with a pulling plate (10), and the back of the pulling plate (10) is symmetrically fixed with two groups of auxiliary springs (11) along the left and right directions, and one end of the auxiliary spring (11) is fixed to the fixed sleeve (2).

3. The reaction-bonded silicon carbide grinding barrel according to claim 2, characterized in that: The auxiliary positioning assembly further comprises a reinforcement tube (24) uniformly inserted around the bottom of the inner cavity of the outer cylinder (1), the top of the reinforcement tube (24) is connected to a vacuum suction cup (25) and the top of the vacuum suction cup (25) is attached to the inner cylinder (3), a docking plate (36) is fixed on the side where the vacuum suction cups (25) are close to each other, and the end of the docking plate (36) away from the vacuum suction cup (25) is fixed on the sliding frame (6), the bottom end of the reinforcement tube (24) is connected to an annular tube (28), and the reinforcement tube (2 4) is fixed with a blocking disk (26), each group of the reinforcement tubes (24) is wound with a second spring (27) and the two ends of the second spring (27) are fixed on the side where the outer tube (1) and the blocking disk (26) are close to each other, a support frame (18) is fixed on the back of the bottom of the outer tube (1), and a tooth plate (19) is slidingly provided on the front of the bottom of the inner cavity of the support frame (18), and a plurality of groups of teeth (13) are fixed in sequence on the left side of the inner cavity of the sliding frame (6) along the up and down directions, and the bottom of the outer tube (1) is fixed along the front Two groups of extension plates (14) are fixed in sequence in the rear direction. The extension plates (14) are rotatably mounted on the sides close to each other with a rotating shaft (15). The rotating shaft (15) is fixed with a first gear (16) and a second gear (17) in sequence along the front-back direction. The first gear (16) is meshed with the side of the teeth (13) close to each other, and the second gear (17) is meshed with the side of the gear plate (19) close to each other. A sealing cylinder (22) is fixed on the back of the bottom of the inner cavity of the support frame (18). The sealing cylinder ( A piston rod (23) is slidably provided in the reinforcing tube (22), and one end of the piston rod (23) passes through the sealing tube (22) and is fixed on the tooth plate (19) through a fixing block. One side of the bottom of the sealing tube (22) is connected to a telescopic tube (34), and the bottom end of the telescopic tube (34) is connected to the annular tube (28). A first solenoid valve (29) is provided at the bottom of the surface of the reinforcing tube (24), and a branch tube (30) is connected to the bottom of the reinforcing tube (24), and a second solenoid valve (31) is provided on the branch tube (30).

4. The reaction-bonded silicon carbide grinding barrel according to claim 3, characterized in that: One end of the sealing cylinder (22) away from the piston rod (23) is connected to a transverse tube (32), and one end of the transverse tube (32) away from the sealing cylinder (22) passes through the support frame (18) and is provided with a third solenoid valve (33).

5. The reaction-bonded silicon carbide grinding barrel according to claim 2, characterized in that: A limiting plate (35) is fixed to the bottom of the front side of the sliding frame (6) and is used in conjunction with a group of extension plates (14) on the front side.

6. The reaction-bonded silicon carbide grinding barrel according to claim 3, characterized in that: The length of the front group of extension plates (14) is greater than the length of the back group of extension plates (14).

7. The reaction-bonded silicon carbide grinding barrel according to claim 2, characterized in that: The two groups of inserting plates (9) are both connected to a U-shaped frame (12) at one end close to the sliding frame (6), and the top of each group of the U-shaped frame (12) is fixed to the bottom of the outer cylinder (1).

8. The reaction-bonded silicon carbide grinding barrel according to claim 3, characterized in that: A sliding groove (20) is provided on the front of the bottom of the inner cavity of the support frame (18), a slide plate (21) is fixed to the bottom of the tooth plate (19), and the bottom of the slide plate (21) is slidably arranged in the sliding groove (20).

9. The reaction-bonded silicon carbide grinding barrel according to claim 2, characterized in that: The front of the pull plate (10) is in an arc-shaped structure, the top of the pull plate (10) is attached to the bottom of the outer cylinder (1), and the front of the pull plate (10) and the surface of the outer cylinder (1) are on the same arc surface.

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