Abrasive belt grinding device for horizontal lathe

Abstract

The utility model discloses an abrasive belt grinding device for a horizontal lathe, which relates to the technical field of lathes and comprises a track arranged on one side of the top end of the horizontal lathe, a sliding seat matched with the horizontal lathe is arranged on the outer side of the track, a sliding plate is arranged at the top end of the sliding seat, and the sliding plate is connected with the sliding seat through a driving mechanism. A vertical plate is arranged on one side of the top end of the sliding plate, a dismounting mechanism is arranged on one side of the vertical plate, an abrasive belt is arranged on one side of the dismounting mechanism, and an adjusting mechanism matched with the dismounting mechanism is arranged on one side of the interior of the abrasive belt. Under the matching action of the sliding seat, the sliding plate, the dismounting mechanism, the abrasive belt and the adjusting mechanism, the abrasive belt with the proper mesh number and the proper length can be selected for grinding according to different workpieces, the abrasive belt replacement process is simple and convenient, and the speed and the quality of the workpieces are improved.

Description

Technical Field

[0001] This utility model relates to the field of lathe technology, and more specifically, to a belt grinding device for a horizontal lathe. Background Technology

[0002] A horizontal lathe is a common machine tool whose main function is to machine metal or other materials by rotating the workpiece and cutting it with a cutting tool. It gets its name from its horizontally arranged spindle. It is typically used to machine cylindrical workpieces, such as shafts and disc-shaped parts. A belt grinding unit is an important component of the lathe, adding to its machining capabilities and enabling more precise and diverse operations.

[0003] Belt grinding can significantly improve the surface finish of workpieces, achieving higher quality standards. Furthermore, it can be used for finishing, removing minor imperfections left from turning processes and ensuring dimensional and shape accuracy. After turning, burrs or sharp edges may remain on the workpiece surface; belt grinding devices can effectively remove these imperfections, improving the overall quality of the workpiece. However, current belt grinding devices cannot select the appropriate grit of abrasive belt based on the workpiece, and belt changing is cumbersome, affecting the workpiece processing speed. Therefore, there is an urgent need to design a belt grinding device for horizontal lathes.

[0004] For example, Chinese patent CN210147458U discloses a horizontal lathe with grinding function, including a bed, a saddle that slides laterally on the bed, a clamping plate that slides horizontally on the saddle, a support rod fixed on the clamping plate, a connecting rod rotatably connected to the upper end of the support rod, a passive roller shaft rotatably connected to the end of the connecting rod away from the support rod, and an abrasive belt connected between the active roller shaft and the passive roller shaft.

[0005] Although this horizontal lathe with grinding function can grind workpieces of different diameters, it cannot select the appropriate grit and length of abrasive belt according to the workpiece during use, and the abrasive belt replacement process is cumbersome, which affects the workpiece processing speed.

[0006] No effective solutions have yet been proposed to address the problems in the relevant technologies. Utility Model Content

[0007] In view of the problems in the related technologies, this utility model proposes a belt grinding device for a horizontal lathe to overcome the above-mentioned technical problems existing in the existing related technologies.

[0008] Therefore, the specific technical solution adopted by this utility model is as follows:

[0009] A belt grinding device for a horizontal lathe includes a rail disposed on one side of the top of the horizontal lathe, a sliding seat that cooperates with the horizontal lathe disposed on the outer side of the rail, a sliding plate disposed on the top of the sliding seat, and the sliding plate and the sliding seat being connected by a drive mechanism; a vertical plate disposed on one side of the top of the sliding plate, a disassembly mechanism disposed on one side of the vertical plate, a sanding belt disposed on one side of the disassembly mechanism, and an adjustment mechanism that cooperates with the disassembly mechanism disposed on one side of the sanding belt.

[0010] Furthermore, in order to bring the sliding plate closer to the workpiece to be ground, so that the abrasive belt can grind the workpiece and improve the workpiece quality, the drive mechanism includes a motor 1 located on one side of the sliding seat, and the output end of the motor 1 is provided with a screw that cooperates with the sliding plate.

[0011] Furthermore, to facilitate the selection of appropriate abrasive belts of suitable grit and length for workpiece grinding during use, and to simplify belt replacement while improving workpiece processing speed, the disassembly mechanism includes an L-shaped plate mounted on one side of the vertical plate. A second motor is mounted at the top of the L-shaped plate, and a rotating rod is mounted through the output end of the second motor at the top of the L-shaped plate. External threads are located on the outer sides of both ends of the rotating rod, with the threads at both ends facing opposite directions. A sliding support plate, which mates with the L-shaped plate, is fitted around the outer side of the external threads. A third motor is mounted at the top of the sliding support plate, and a rotating column, which mates with the abrasive belt, is mounted at the output end of the third motor. Grooves are formed at both ends of the rotating column, and grooves are provided on the outer sides of the grooves. The device includes a sealing element; one end of the L-shaped plate has a sliding groove that mates with the sliding support plate; the sliding support plate is L-shaped, and one side of the sliding support plate has a protrusion that mates with the sliding groove; the sealing element includes C-shaped rings symmetrically arranged on the outside of the groove, one slot is opened on one side of the top of the C-shaped ring, one slot is opened on one side of the first slot, and one slot is opened on the bottom of the first slot; one slot is opened on the other side of the bottom of the C-shaped ring, one slot is opened on one side of the fourth slot, and one slot is opened on the bottom of the fourth slot; both ends of the C-shaped ring are provided with limit blocks, and the inner side of the C-shaped ring is provided with a limit ring that mates with the groove; the two C-shaped rings are connected by symmetrically arranged limit posts, and the top of the limit posts is provided with a pull ring.

[0012] Furthermore, in order to enable the abrasive belt to flexibly conform to various types of workpieces for grinding, and improve the grinding quality and surface finish of the workpieces, the adjustment mechanism includes a support plate set on one side of the L-shaped plate, a cylinder set at the top of the support plate, a U-shaped plate set at the output end of the cylinder, a motor set at one end of the U-shaped plate, a rotating rod set at the output end of the motor that passes through the end of the U-shaped plate, and external threads are set on the outer sides of both ends of the rotating rod, and the thread directions of the external threads at both ends of the rotating rod are opposite. A sliding post is sleeved on the outer side of the external threads, and a pressure strip that cooperates with the abrasive belt is set on one side of the sliding post.

[0013] The beneficial effects of this utility model are as follows:

[0014] 1) With the combined action of the sliding seat, sliding plate, disassembly mechanism, sanding belt and adjustment mechanism, this utility model can select the appropriate grit and length of sanding belt for grinding according to different workpieces, and the sanding belt replacement process is simple, which improves the speed and quality of workpieces.

[0015] 2) With the combined action of the sliding seat, sliding plate, sanding belt and adjustment mechanism, the sanding belt can flexibly fit various types of workpieces for grinding, thereby improving the grinding quality and surface finish of the workpieces.

[0016] 3) With the combined action of the disassembly mechanism and the abrasive belt, the appropriate abrasive belt of suitable grit and length can be selected for grinding according to the workpiece during use. The abrasive belt replacement process is simple, which improves the processing speed of the workpiece. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is one of the structural schematic diagrams of a horizontal lathe belt grinding device according to an embodiment of the present utility model in practical application;

[0019] Figure 2 This is the second schematic diagram of the structure of a horizontal lathe belt grinding device according to an embodiment of the present utility model in practical application;

[0020] Figure 3 This is a structural schematic diagram of the disassembly mechanism and adjustment mechanism in a horizontal lathe belt grinding device according to an embodiment of the present utility model;

[0021] Figure 4 This is a schematic diagram of the disassembly mechanism and adjustment mechanism at another angle in a horizontal lathe belt grinding device according to an embodiment of the present invention;

[0022] Figure 5 This is a schematic diagram of the structure of the sealing member in a belt grinding device for a horizontal lathe according to an embodiment of the present utility model;

[0023] Figure 6 This is a three-dimensional assembly drawing of the sealing component in a belt grinding device for a horizontal lathe according to an embodiment of the present utility model.

[0024] In the picture:

[0025] 1. Horizontal lathe; 2. Rail; 3. Sliding seat; 4. Sliding plate; 5. Drive mechanism; 501. Motor 1; 502. Screw; 6. Vertical plate; 7. Disassembly mechanism; 701. L-shaped plate; 7011. Sliding groove; 702. Motor 2; 703. Rotating rod 1; 704. External thread 1; 705. Sliding support plate; 7051. Protrusion; 706. Motor 3; 707. Rotating column; 708. Groove; 709. Sealing part; 7091. C-ring; 7092 7093. Groove 2; 7094. Groove 3; 7095. Groove 4; 7096. Groove 5; 7097. Groove 6; 7098. Limiting block; 7099. Limiting ring; 70910. Limiting post; 70911. Pull ring; 8. Sanding belt; 9. Adjusting mechanism; 901. Support plate; 902. Cylinder; 903. U-shaped plate; 904. Motor 4; 905. Rotating rod 2; 906. External thread 2; 907. Sliding post; 908. Pressure strip. Detailed Implementation

[0026] To further illustrate the various embodiments, the present invention provides accompanying drawings, which are part of the disclosure of the present invention. These drawings are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, those skilled in the art should be able to understand other possible implementation methods and the advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0027] According to an embodiment of the present invention, a belt grinding device for a horizontal lathe is provided.

[0028] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments, such as... Figures 3-6 As shown, the belt grinding device for a horizontal lathe according to an embodiment of the present invention includes a track 2 disposed on one side of the top of the horizontal lathe 1, a sliding seat 3 that cooperates with the horizontal lathe 1 disposed on the outer side of the track 2, a sliding plate 4 disposed on the top of the sliding seat 3, and the sliding plate 4 and the sliding seat 3 connected by a drive mechanism 5; a vertical plate 6 disposed on one side of the top of the sliding plate 4, a disassembly mechanism 7 disposed on one side of the vertical plate 6, a sanding belt 8 disposed on one side of the disassembly mechanism 7, and an adjustment mechanism 9 that cooperates with the disassembly mechanism 7 disposed on the inner side of the sanding belt 8.

[0029] With the help of the above technical solution, this utility model, through the combined action of the sliding seat 3, sliding plate 4, disassembly mechanism 7, sanding belt 8, and adjustment mechanism 9, allows for the selection of sanding belts with appropriate grit and length for different workpieces, and the sanding belt replacement process is simple, improving the workpiece speed and quality. The combined action of the sliding seat 3, sliding plate 4, sanding belt 8, and adjustment mechanism 9 allows the sanding belt 8 to flexibly conform to various types of workpieces for grinding, improving the grinding quality and surface finish of the workpieces. The combined action of the disassembly mechanism 7 and the sanding belt 8 allows for the selection of sanding belts with appropriate grit and length for the workpiece during use, and the sanding belt replacement process is simple, improving the workpiece processing speed.

[0030] It should be explained that the horizontal lathe 1 consists of a bed, headstock, tailstock, tool post, feed mechanism, saddle, slide, leadscrew, feed rod, transmission system, control system, cooling system, and lubrication system. The bed is the basic structure of the lathe, usually made of cast iron, providing a stable support platform. The headstock contains the spindle, which is connected to the electric motor via belt or gear drive. The headstock also contains a speed change mechanism for adjusting the spindle speed. The tailstock is mounted at the other end of the bed and can move along the bed guide rails. The tool post is used to fix and move the cutting tool. The feed mechanism controls the movement of the tool post, including longitudinal (along the bed direction) and transverse (perpendicular to the bed direction) movements. Feed; the saddle is mounted on the bed and can move along the bed guide rails; the slide is mounted on the saddle and can move longitudinally and laterally, driving the tool post for cutting; the leadscrew is used for thread machining, driving the tool post to move precisely; the feed rod is used for general longitudinal feed, providing smooth movement; the transmission system transmits power to the spindle and feed mechanism; the control system includes various switches, handles, and operation panels for controlling the lathe's start, stop, speed adjustment, and feed operation; the cooling system is used to cool the workpiece and tool during machining to prevent overheating; the lubrication system is used to lubricate various moving parts, reducing wear and improving accuracy; the horizontal lathe 1 is existing technology and will not be explained in detail here.

[0031] Furthermore, the belt grinding device for horizontal lathes of this utility model can not only grind workpieces on horizontal lathes, but also adapt to other types of lathes by changing the parameters of the sliding seat 3 and the sliding plate 4, and grind workpieces on the lathes according to the characteristics of other lathes, thereby improving the grinding speed and quality of the workpieces.

[0032] In one embodiment, the drive mechanism 5 includes a motor 501 disposed on one side of the sliding seat 3. The output end of the motor 501 is provided with a screw 502 that cooperates with the sliding plate 4, so that the sliding plate 4 is close to the workpiece to be ground, so that the abrasive belt 8 can grind the workpiece and improve the quality of the workpiece.

[0033] In one embodiment, the disassembly mechanism 7 includes an L-shaped plate 701 disposed on one side of the upright plate 6. A second motor 702 is disposed at the top of the L-shaped plate 701. A rotating rod 703 is disposed through the output end of the second motor 702, passing through the top of the L-shaped plate 701. External threads 704 are disposed on the outer sides of both ends of the rotating rod 703, and the thread directions of the external threads 704 at both ends of the rotating rod 703 are opposite. The outer side of the external threads 704 is fitted with a sleeve that corresponds to the L-shaped plate 701. A sliding support plate 705 is provided in conjunction with the sliding support plate 705. A motor 706 is mounted on the top of the sliding support plate 705. A rotating column 707, which cooperates with the sanding belt 8, is mounted on the output end of the motor 706. Grooves 708 are provided at both ends of the outer side of the rotating column 707, and sealing members 709 are provided on the outer side of the grooves 708. A sliding groove 7011, which cooperates with the sliding support plate 705, is provided at one end of the L-shaped plate 701. The sliding support plate 705 is L-shaped, and one side of the sliding support plate 705 is provided with a groove that cooperates with the sliding belt 8. The moving groove 7011 is fitted with a protrusion 7051; the sealing member 709 includes C-shaped rings 7091 symmetrically arranged on the outside of the groove. A groove 7092 is formed on one side of the top of the C-shaped ring 7091, a groove 7093 is formed on one side of the groove 7092, and a groove 7094 is formed at the bottom of the groove 7092. A groove 7095 is formed on the other side of the bottom of the C-shaped ring 7091, a groove 7096 is formed on one side of the groove 7095, and a groove 7096 is formed at the bottom of the groove 7095. The groove 7097; both ends of the C-ring 7091 are provided with limit blocks 7098, and the inner side of the C-ring 7091 is provided with a limit ring 7099 that cooperates with the groove 708. The two C-rings 7091 are connected by symmetrically arranged limit posts 70910. The top of the limit post 70910 is provided with a pull ring 70911, so that during use, the appropriate grit and length of the abrasive belt 8 can be selected for grinding according to the workpiece, and the abrasive belt replacement process is simple, improving the processing speed of the workpiece.

[0034] The working principle of the disassembly mechanism 7 is as follows: In the initial state, the operator removes the sealing part 709 at one end of the workpiece and replaces it with a sanding belt 8 of appropriate grit. The specific working principle of the sealing part 709 is as follows: Under the control panel on the horizontal lathe 1, the motor 2 702 is controlled and started. Under the action of the output end of the motor 2 702, the motor 2 702 drives the rotating rod 1 703 to rotate. Under the action of the L-shaped plate 701, the rotating rod 1 703 rotates stably. The sliding support plate 705 is respectively sleeved on the threads 704 of the external threads 704 at both ends of the rotating rod 1 703. At positions with opposite grain direction, the rotating rod 703 drives the sliding support plate 705 to move towards each other during rotation. Under the cooperation of the sliding groove 7011 and the protrusion 7051, the sliding support plate 705 moves steadily towards each other. The movement of the sliding support plate 705 towards each other drives the motor 706 to move towards each other. Under the action of the output shaft of the motor 706, the rotating column 707 is driven to rotate. During the rotation of the rotating column 707, the sanding belt 8 moves. The movement of the motor 706 towards each other causes the sanding belt 8 to loosen or tighten, realizing the replacement of sanding belts 8 of different lengths.

[0035] The working principle of the sealing component 709 is as follows: During installation, the operator places the limiting ring 7099 on one of the C-rings 7091 onto the groove 708, then aligns the first groove 7092 of the other C-ring 7091 with the fourth groove 7095 of the C-ring 7091, and slides the other C-ring 7091 until the limiting blocks 7098 on the two C-rings 7091 respectively abut against the second groove 7093 and the fifth groove 7096. At this time, a placement groove is formed between the sixth groove 7097 and the third groove 7094. The limiting post 70910 is placed in the placement groove, and the sealing component 709 forms a seal against the rotating post 707.

[0036] During disassembly, the operator pulls out the limiting post 70910 through the pull ring 70911, and then pulls one of the C-shaped rings 7091, so that the limiting blocks 7098 on both C-shaped rings 7091 are moved away from the second groove 7093 and the fifth groove 7096. At this time, the limiting ring 7099 is moved away from the groove 708, realizing the separation of the sealing part 709 from the rotating post 707.

[0037] In one embodiment, the adjustment mechanism 9 includes a support plate 901 disposed on one side of the L-shaped plate 701, a cylinder 902 disposed at the top of the support plate 901, a U-shaped plate 903 disposed at the output end of the cylinder 902, a motor 904 disposed at one end of the U-shaped plate 903, a rotating rod 905 disposed at the output end of the motor 904 passing through one end of the U-shaped plate 903, external threads 906 disposed on the outer sides of both ends of the rotating rod 905, and the thread directions of the external threads 906 at both ends of the rotating rod 905 are opposite, a sliding post 907 sleeved on the outer side of the external threads 906, and a pressure strip 908 that cooperates with the sanding belt 8 disposed on one side of the sliding post 907, so that the sanding belt 8 can flexibly conform to various types of workpieces for grinding, thereby improving the grinding quality and surface finish of the workpieces.

[0038] The working principle of the adjustment mechanism 9 is as follows: In the initial state, under the control of the control panel on the horizontal lathe 1, the motor 904 is controlled and started. Under the action of the output shaft of the motor 904, the rotating rod 905 is driven to rotate. Under the action of the U-shaped plate 903, the rotating rod 905 rotates stably. The sliding column 907 is respectively sleeved at the opposite positions of the thread direction of the external thread 906 at both ends of the rotating rod 905. During the rotation of the rotating rod 905, the sliding column 907 is driven to move towards each other. The moving of the sliding column 907 towards each other drives the pressure bar 908 to move towards each other. The pressure bar 908 can adjust the distance on the sanding belt 8 according to the area to be ground on the workpiece. Under the control of the control panel on the horizontal lathe 1, the cylinder 902 is controlled and started. Under the action of the output shaft of the cylinder 902, the U-shaped plate 903 is driven to move, so that the pressure bar 908 can press the sanding belt 8 according to the position of the workpiece, so as to achieve the fit between the sanding belt 8 and the workpiece to be ground.

[0039] To facilitate understanding of the above-mentioned technical solutions of this utility model, the working principle or operation method of this utility model in actual process will be described in detail below.

[0040] like Figures 1-6In practical applications, in the initial state, the operator, based on the type of workpiece to be ground, removes the stopper 709 at one end and replaces it with an abrasive belt 8 of appropriate length and grit (the specific working principle of the stopper 709 is described above). Under the control panel on the horizontal lathe 1, the operator controls and starts the second motor 702, keeping the abrasive belt 8 taut (the specific working principle of the disassembly mechanism 7 is described above). Under the control panel on the horizontal lathe 1, the operator controls and starts the first motor 501. Under the action of the output shaft of the first motor 501, the screw 502 rotates. During the rotation of the screw 502, the sliding plate 4 slides... The machine moves closer to the workpiece to be ground on seat 3. Under the control of the control panel on the horizontal lathe 1, motor 4 904 is controlled and started. Under the action of the output shaft of motor 4 904, rotating rod 2 905 is driven to rotate, which drives pressure bar 908 to move in opposite directions. Pressure bar 908 adjusts the distance on the abrasive belt 8 according to the area and position of the workpiece to be ground, so that the abrasive belt 8 is in close contact with the workpiece to grind (the specific working principle of adjustment mechanism 9 is as described above). Under the control of the control panel on the horizontal lathe 1, motor 3 706 is controlled and started. Under the action of the output shaft of motor 3 706, rotating column 707 is driven to rotate, which in turn drives abrasive belt 8 to grind the workpiece.

[0041] In summary, with the help of the above-mentioned technical solution of this utility model, under the combined action of the sliding seat 3, sliding plate 4, disassembly mechanism 7, sanding belt 8, and adjustment mechanism 9, it is possible to select a sanding belt of appropriate grit and length for grinding according to different workpieces, and the sanding belt replacement process is simple, thereby improving the workpiece speed and quality; under the combined action of the sliding seat 3, sliding plate 4, sanding belt 8, and adjustment mechanism 9, the sanding belt 8 can flexibly conform to various types of workpieces for grinding, thereby improving the grinding quality and surface finish of the workpieces; under the combined action of the disassembly mechanism 7 and the sanding belt 8, during use, a sanding belt 8 of appropriate grit and length can be selected for grinding according to the workpiece, and the sanding belt replacement process is simple, thereby improving the workpiece processing speed.

[0042] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0043] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A belt grinding device for a horizontal lathe, comprising a track (2) provided on one side of the top end of a horizontal lathe (1), characterized in that, The outer side of the track (2) is provided with a sliding seat (3) matched with the horizontal lathe (1), and the top end of the sliding seat (3) is provided with a sliding plate (4); the sliding plate (4) and the sliding seat (3) are connected through a driving mechanism (5). The top end of the sliding plate (4) is provided with a vertical plate (6), one side of the vertical plate (6) is provided with a dismounting mechanism (7), one side of the dismounting mechanism (7) is provided with a sand belt (8), and the inner side of the sand belt (8) is provided with an adjusting mechanism (9) matched with the dismounting mechanism (7).

2. The apparatus according to claim 1, wherein The driving mechanism (5) comprises a motor one (501) arranged on one side of the sliding seat (3), and the output end of the motor one (501) is provided with a screw rod (502) matched with the sliding plate (4).

3. The apparatus according to claim 1, wherein The dismounting mechanism (7) comprises an L-shaped plate (701) arranged on one side of the vertical plate (6), and the top end of the L-shaped plate (701) is provided with a motor two (702); the output end of the motor two (702) penetrates through the top end of the L-shaped plate (701) and is provided with a rotating rod one (703); the outer sides of the two ends of the rotating rod one (703) are both provided with outer threads one (704), and the thread directions of the outer threads one (704) located at the two ends of the rotating rod one (703) are opposite; the outer side of the outer threads one (704) is sleeved with a sliding support plate (705) matched with the L-shaped plate (701); the top end of the sliding support plate (705) is provided with a motor three (706); the output end of the motor three (706) is provided with a rotating column (707) matched with the sand belt (8); the outer sides of the two ends of the rotating column (707) are both provided with grooves (708); and the outer sides of the grooves (708) are provided with blocking pieces (709).

4. The apparatus according to claim 3, wherein One end of the L-shaped plate (701) is provided with a sliding groove (7011) matched with the sliding support plate (705).

5. The apparatus according to claim 4, wherein The sliding support plate (705) is in the shape of an L, and one side of the sliding support plate (705) is provided with a protruding block (7051) matched with the sliding groove (7011).

6. The apparatus according to claim 3, wherein The blocking pieces (709) comprise C-shaped rings (7091) symmetrically arranged on the outer sides of the grooves (708); the top end of the C-shaped ring (7091) is provided with a slot one (7092); one side of the slot one (7092) is provided with a slot two (7093); and the bottom end of the slot one (7092) is provided with a slot three (7094). The bottom end of the C-shaped ring (7091) is provided with a slot four (7095) on the other side; one side of the slot four (7095) is provided with a slot five (7096); and the bottom end of the slot four (7095) is provided with a slot six (7097). Both ends of the C-shaped ring (7091) are provided with limiting blocks (7098), the inner side of the C-shaped ring (7091) is provided with a limiting ring (7099) matched with the groove (708), the two C-shaped rings (7091) are connected through the symmetrically arranged limiting columns (70910), and the top end of the limiting column (70910) is provided with a pull ring (70911).

7. The apparatus according to claim 3, wherein The adjusting mechanism (9) comprises a supporting plate (901) arranged on one side of the L-shaped plate (701), a gas cylinder (902) is arranged at the top end of the supporting plate (901), a U-shaped plate (903) is arranged at the output end of the gas cylinder (902), a motor four (904) is arranged at one end of the U-shaped plate (903), a rotating rod two (905) is arranged at the output end of the motor four (904) and penetrates one end of the U-shaped plate (903), outer threads two (906) are arranged at the outer sides of the two ends of the rotating rod two (905), the screw directions of the outer threads two (906) located at the two ends of the rotating rod two (905) are opposite, sliding columns (907) are arranged at the outer sides of the outer threads two (906), and pressing strips (908) matched with the abrasive belt (8) are arranged on one side of the sliding columns (907).

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