Sheet metal grinding machine and grinding process

Abstract

The present invention relates to the technical field of sheet metal grinding, and in particular to a sheet metal grinding machine and grinding process, comprising a rotating disk, a grinding block fixedly connected to the outside of the rotating disk, a connecting pipe fixedly connected to the bottom of the rotating disk, a steering assembly installed at the bottom of the connecting pipe, and the steering assembly is used to adjust the grinding angle of the rotating disk and the grinding block, a connecting pipe installed at the bottom of the steering assembly, and the connecting pipe at the bottom is connected to an external driving source, and the steering assembly comprises a pair of transmission blocks, and a pair of clamping plates are fixedly connected to the sides of the pair of transmission blocks close to each other; the inner wall of the sheet metal pipe can be ground by rotating the grinding block, and a steering assembly is provided, so that the embodiment of the present invention makes the rotating disk and the grinding block deflect when moving to the bent pipe part, and even after deflection, they can still be driven to rotate by the external driving source, thereby achieving the effect of adapting to the bent pipe for grinding.

Description

Technical Field

[0001] The present invention relates to the technical field of sheet metal grinding, in particular to a sheet metal grinding machine and a grinding process. Background Art

[0002] The processing of metal sheets is called sheet metal processing. For example, sheets are used to make iron drums, fuel tanks and oil cans, ventilation ducts, elbows and reducers, etc. The main processes are shearing, bending and flanging, bending forming, welding, riveting, etc. The products processed by sheet metal technology are called sheet metal parts. The sheet metal parts referred to in different industries are generally different, and are mostly used as the name during assembly.

[0003] After the pipes are manufactured using sheet metal technology, since the pipes need to be used to transport gas or liquid, if there are a large number of burrs and bumps remaining on the inner wall of the pipes, it is easy to cause poor transportation of gas or liquid inside the pipes. In severe cases, these burrs and bumps will fall off from the pipes under the flushing of gas or liquid and be transported along with the gas or liquid. If some substances with higher purity requirements are transported, the purity of the substances will be reduced, affecting their use.

[0004] The grinding equipment in the existing technology cannot effectively enter the interior of the bent pipe for grinding, especially the bent part, which is even more difficult to handle. The main problem is that when the grinding device is grinding on the bent part, its rotation axis is difficult to change with the bending angle. Summary of the Invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the problem in the prior art that when a grinding device is grinding a curved portion, its rotation axis is difficult to change as the bending angle changes.

[0006] In order to solve the above technical problems, the present invention provides a sheet metal grinding machine, comprising a rotating disk, a sanding block fixedly connected to the outside of the rotating disk, a connecting pipe fixedly connected to the bottom of the rotating disk, a steering assembly installed at the bottom of the connecting pipe, the steering assembly is used to adjust the grinding angle of the rotating disk and the sanding block, a connecting pipe installed at the bottom of the steering assembly, and the connecting pipe at the bottom is connected to an external drive source.

[0007] In one embodiment of the present invention, the steering assembly includes a pair of transmission blocks, and a pair of clamping plates are fixedly connected to one side of the pair of transmission blocks that are close to each other. The two pairs of clamping plates are staggered, and a universal joint is rotatably connected between the two pairs of clamping plates. The pair of transmission blocks are respectively arranged at the ends of corresponding connecting pipes and are connected through a connecting assembly. The connecting assembly is used to connect the connecting pipe and the transmission block so that the connecting pipe drives the transmission block to rotate during the rotation process.

[0008] In one embodiment of the present invention, the connecting component includes a fixing frame, one end of which is fixedly connected to the transmission block, and the other end of which is fixedly connected to the inside of the connecting pipe with a gap between the fixing frame and the connecting pipe.

[0009] In one embodiment of the present invention, a water hole is formed inside the connecting pipe, and a plurality of Y-shaped water spraying grooves are formed inside the rotating disk, and the water hole is connected to the water spraying grooves.

[0010] In one embodiment of the present invention, a connecting block is provided between a pair of the connecting tubes and the transmission block, the connecting tubes and the transmission block are both sealed inside the connecting block, and a cavity is left between the connecting tubes and the transmission block, a plurality of rubber tubes are connected between the pair of the connecting blocks, and the connection points between the rubber tubes and the transmission block are set within the range of the cavity.

[0011] In one embodiment of the present invention, a plurality of connecting rods are fixed to the outside of the connecting block away from the rotating disk, one end of the connecting rod away from the connecting block is fixed to a limiting disk, and a rubber ring is fixed to the outside of the limiting disk, and the diameter of the rubber ring is consistent with the diameter of the sanding block.

[0012] In one embodiment of the present invention, the water trough is divided into a vertical portion and a V-shaped portion, and a closing plug is slidably connected inside the rotating disk and at a position corresponding to the vertical portion of the water trough. A return spring is fixedly connected between the closing plug and the rotating disk, and a limiting column is slidably connected inside the closing plug, and the end of the limiting column away from the closing plug is fixedly connected to the rotating disk.

[0013] In one embodiment of the present invention, an adjusting magnet is fixedly connected to the interior of the sealing plug, and an electromagnet is installed inside the rotating disk at a position corresponding to the adjusting magnet.

[0014] In one embodiment of the present invention, a flow-breaking block is fixedly connected to the end of the closing plug away from the return spring. The cross-section of the flow-breaking block is triangular, and the angle of the flow-breaking block away from the closing plug is adapted to the angle of the V-shaped portion of the water spray trough.

[0015] A sheet metal grinding process, which is performed using a sheet metal grinding machine as described above, comprises the following steps:

[0016] S1. Insert the rotating disc, sanding block, and connecting pipe into the interior of the pipe, then start the external driving source to drive the connecting pipe to rotate. The rotation of the connecting pipe drives the rotating disc and sanding block to rotate for grinding;

[0017] S2. When encountering some curved pipes, the grinding machine is continuously fed into the inner part of the sheet metal pipe. Due to the setting of the steering assembly, the rotating disk and the grinding block will deflect when moving to the curved pipe part;

[0018] S3. Due to the setting of the steering assembly, the rotation and grinding axis of the rotating disk and the grinding block are always the center line, thereby achieving the effect of grinding the bend.

[0019] The above technical solution of the present invention has the following advantages over the prior art:

[0020] The sheet metal grinding machine and grinding process described in the present invention can grind the inner wall of the sheet metal pipe by rotating the grinding block. A steering assembly is provided so that the rotating disk and the grinding block of the embodiment of the present invention will be deflected when moving to the curved pipe part, and even after deflection, they can still be driven to rotate by an external driving source, thereby achieving the effect of adapting to the curved pipe for grinding.

[0021] The sheet metal grinding machine and grinding process described in the present invention are provided with a water hole and a water spray trough. By injecting grinding fluid into the water hole and finally injecting it into the water spray trough for spraying out, the internal cooling effect of the grinder is achieved, the sheet metal pipe fittings are protected, and the grinding effect is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to make the contents of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments of the present invention in conjunction with the accompanying drawings.

[0023] Figure 1 It is a perspective view of the present invention;

[0024] Figure 2 It is a front view of the present invention;

[0025] Figure 3 It is a schematic structural diagram of the steering assembly in the present invention;

[0026] Figure 4 This is a cross-sectional view of the steering assembly structure of the present invention;

[0027] Figure 5 It is a cross-sectional view of the rotating disk structure of the present invention;

[0028] Figure 6 It is a schematic diagram of the water spout structure of the present invention;

[0029] Figure 7 It is a process flow chart of the present invention;

[0030] Explanation of the reference numerals in the accompanying drawings in the specification: 1. rotating disk; 2. sanding block; 3. connecting pipe; 4. connecting block; 5. transmission block; 6. clamping plate; 7. universal joint; 8. fixing frame; 9. water spray trough; 10. rubber tube; 11. connecting rod; 12. limit plate; 13. rubber ring; 14. closing plug; 15. reset spring; 16. limit column; 17. adjusting magnet; 18. electromagnet; 19. flow-breaking block. DETAILED DESCRIPTION

[0031] The present invention will be further described below with reference to the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it. However, the embodiments are not intended to limit the present invention.

[0032] like Figures 1 to 2 As shown, a sheet metal grinding machine comprises a rotating disk 1, a grinding block 2 is fixedly connected to the outside of the rotating disk 1, a connecting pipe 3 is fixedly connected to the bottom of the rotating disk 1, a steering assembly is installed at the bottom of the connecting pipe 3, the steering assembly is used to adjust the grinding angle of the rotating disk 1 and the grinding block 2, a connecting pipe 3 is installed at the bottom of the steering assembly, and the connecting pipe 3 at the bottom is connected to an external driving source; when working, first, according to the requirements of the sheet metal pipe to be processed, an embodiment of the present invention of appropriate specifications is selected, after the outer surface of the sheet metal pipe is ground, the rotating disk 1, the grinding block 2, and the connecting pipe 3 are inserted into the interior of the pipe, and then Then, the external driving source is started to drive the connecting pipe 3 to rotate. The rotation of the connecting pipe 3 drives the rotating disk 1 and the grinding block 2 to rotate. In this way, the inner wall of the sheet metal pipe can be ground by the rotation of the grinding block 2. Furthermore, when encountering some curved pipes, the employees can still continue to feed the equipment of the embodiment of the present invention into the interior of the sheet metal pipe. Since the steering component is provided, the rotating disk 1 and the grinding block 2 of the embodiment of the present invention will be deflected when moving to the curved pipe part, and even after they are deflected, they can still be driven to rotate by the external driving source, thereby achieving the effect of adapting to the curved pipe for grinding.

[0033] like Figures 2 to 4As shown, the steering assembly includes a pair of transmission blocks 5, and a pair of clamping plates 6 are fixedly connected to one side of the transmission blocks 5 close to each other. The two pairs of clamping plates 6 are staggered, and a universal joint 7 is rotatably connected between the two pairs of clamping plates 6. The pair of transmission blocks 5 are respectively arranged at the ends of the corresponding connecting pipes 3 and are connected by a connecting component. The connecting component is used to connect the connecting pipe 3 and the transmission block 5 so that the connecting pipe 3 drives the transmission block 5 to rotate during the rotation process; when working, when grinding the bent pipe part, the difficulty is that the rotation direction applied by the external driving source is certain, and when grinding the bent pipe, it is necessary to ensure that the rotation axis of the grinding piece must change at all times. Otherwise, uneven grinding will occur, resulting in the scrapping of the workpiece. When the embodiment of the present invention works on the bend part, the rotating disk 1 and the grinding block 2 will be deflected by the action of the pipeline, thereby driving the connecting pipe 3 to deflect. The deflection of the connecting pipe 3 drives the transmission block 5 and the clamping plate 6 to deflect. Since the clamping plate 6 is rotatably connected to the universal shaft 7, the rotating disk 1 and the grinding block 2 can be deflected normally. At this time, the connecting pipe 3 connected to the driving source rotates, and the rotating disk 1 and the grinding block 2 can also rotate, and the rotation axis of the rotating disk 1 and the grinding block 2 is its center line, thereby achieving the effect of grinding the bend.

[0034] like Figures 2 to 4 As shown, the connecting component includes a fixing frame 8, one end of which is fixedly connected to the transmission block 5, and the other end of the fixing frame 8 is fixedly connected to the inside of the connecting pipe 3, with a gap left between the fixing frame 8 and the connecting pipe 3; when working, the connecting pipe 3 and the transmission block 5 are connected through the design of the fixing frame 8, so that the connecting pipe 3 can drive the transmission block 5 to perform synchronous transmission during the rotation process, thereby achieving a transmission effect.

[0035] like Figures 5 and 6 As shown, there is a water hole inside the connecting pipe 3, and a plurality of "Y"-shaped water spray grooves 9 are formed inside the rotating disk 1, and the water hole is connected to the water spray groove 9; during operation, when the inner wall of the pipe is ground, the grinding fluid cannot be effectively injected into the inside of the pipe from the outside, which easily leads to excessively high temperature during grinding, thereby causing high-temperature damage and cracking of the sheet metal pipe, resulting in the scrapping of the pipe fitting. In this way, the water hole and the water spray groove 9 are provided, and the grinding fluid is injected into the water hole and finally injected into the water spray groove 9 and sprayed out, thereby achieving the internal cooling effect of the grinder, protecting the sheet metal pipe fittings, and improving the grinding effect.

[0036] like Figures 2 to 4As shown, a pair of connecting tubes 3 and the transmission block 5 are provided with a connecting block 4, and the connecting tube 3 and the transmission block 5 are sealed inside the connecting block 4, and a cavity is left between the connecting tube 3 and the transmission block 5, and a pair of connecting blocks 4 are connected with a plurality of rubber tubes 10, and the connection points of the rubber tubes 10 and the transmission block 5 are set within the range of the cavity; when working, due to the provision of the universal shaft 7, the pair of connecting tubes 3 will actually deflect relative to each other when the bend is polished, and the rotation angles are different. If the connecting tubes 3 are connected directly to the connecting tubes 3, the connecting tubes 3 will rotate relative to each other, and the rotation angles are different. The pipe fittings are used to transport grinding fluid, and the pipe fittings will inevitably become entangled with each other and become stuck, causing damage to the equipment. Therefore, a connecting block 4 is designed so that the connecting pipe 3 and the transmission block 5 are rotatably sealed inside the connecting block 4 and a cavity is left. At the same time, since there is a gap between the fixing frame 8 and the connecting pipe 3, that is, the fixing frame 8 does not completely block the water hole, the water hole inside the connecting pipe 3 can pass through the gap into the cavity inside the connecting block 4, and finally the grinding fluid in the two cavities is transported through the rubber tube 10, thus achieving the effect of steering transportation.

[0037] like Figures 1 to 2 As shown, the outside of the connecting block 4 away from the rotating disk 1 is fixed with a plurality of connecting rods 11, and one end of the connecting rod 11 away from the connecting block 4 is fixedly connected to a limit plate 12, and the outside of the limit plate 12 is fixedly connected with a rubber ring 13, and the diameter of the rubber ring 13 is consistent with the diameter of the grinding block 2; when working, in the process of conveying the grinding fluid, the pair of connecting blocks 4 should be ensured as much as possible not to rotate with the connecting pipe 3 and the transmission block 5, so the connecting rod 11, the limit plate 12 and the rubber ring 13 are designed. After entering the interior of the pipeline, the rubber ring 13 will adhere to the inner wall of the pipeline, thereby exerting resistance to avoid the transmission block 5 connected to the limit plate 12. The movable block 5 rotates, but the transmission block 5 close to the rotating disk 1 needs to enter the curved pipe part, so it cannot be set to this mode. At this time, the material of the rubber tube 10 can be adjusted to make it have bending ability and a certain hardness, and in the actual working process, the inside of the rubber tube 10 is filled with grinding fluid, so that the strength of the rubber tube 10 will have a certain prompt. In this way, the two transmission blocks 5 are connected by the rubber tube 10, which can effectively prevent the transmission block 5 from rotating; further, some filter holes can be started on the limit plate 12 to discharge the grinding fluid in some working conditions where vertical grinding is required.

[0038] like Figures 5 and 6As shown, the water trough 9 is divided into a vertical portion and a V-shaped portion, and a closing plug 14 is slidably connected to the position of the vertical portion of the water trough 9 inside the rotating disk 1, and a return spring 15 is fixedly connected between the closing plug 14 and the rotating disk 1. A limiting column 16 is slidably connected to the inside of the closing plug 14, and the end of the limiting column 16 away from the closing plug 14 is fixedly connected to the rotating disk 1; when working, in the actual grinding process, different speeds require different amounts of grinding fluid, and for this purpose, the closing plug 14 is designed. During the rotation of the rotating disk 1, it will simultaneously drive the closing plug 14 to rotate, and under the centrifugal force Under the action, the closing plug 14 compresses the return spring 15 and slides along the limit column 16, thereby separating the closing plug 14 from the vertical part of the water trough 9 and gradually exposing the V-shaped part, so that the grinding fluid can be discharged through the V-shaped part. Through this design, the faster the rotation speed of the rotating disk 1, the larger the exposure range of the V-shaped part, until it is completely exposed. As the V-shaped part is exposed, the passage of the grinding fluid will increase, thereby increasing the discharge amount of the grinding fluid, thereby achieving the effect of adjusting the discharge amount of the grinding fluid according to the rotation speed; it should be noted that the closing plug 14 in the initial state should be slidably sealed in the vertical part of the water trough 9.

[0039] like Figures 5 and 6 As shown, an adjusting magnet 17 is fixedly connected to the inside of the closing plug 14, and a pass electromagnet 18 is installed inside the rotating disk 1 at a position corresponding to the adjusting magnet 17; during operation, through the design of the adjusting magnet 17 and the pass electromagnet 18, in certain special cases, the pass electromagnet 18 can be turned on to make it magnetic and exert a force on the adjusting magnet 17, and this force will act on the reset spring 15, so that the force required for the closing plug 14 to compress the reset spring 15 to deform it can be adjusted to adapt to the grinding fluid discharge requirements under different speeds and different conditions.

[0040] like Figures 5 and 6 As shown, the end of the closing plug 14 away from the return spring 15 is fixedly connected to a flow-breaking block 19, the cross-section of the flow-breaking block 19 is triangular, and the angle of the flow-breaking block 19 away from the closing plug 14 is adapted to the angle of the V-shaped portion of the water spray trough 9; during operation, by designing the flow-breaking block 19 and its triangular cross-section, the discharged grinding fluid can be diverted to prevent the grinding fluid from directly hitting the closing plug 14 during discharge to generate backflow, thereby increasing the discharge rate of the grinding fluid.

[0041] like Figure 7 As shown, a sheet metal grinding process is performed using a sheet metal grinding machine as described above, comprising the following steps:

[0042] S1. Insert the rotating disc 1, the sanding block 2, and the connecting pipe 3 into the interior of the pipe fitting, and then start the external driving source to drive the connecting pipe 3 to rotate. The rotation of the connecting pipe 3 drives the rotating disc 1 and the sanding block 2 to rotate for grinding;

[0043] S2. When encountering some curved pipes, the grinding machine is continuously fed into the inner part of the sheet metal pipe. Due to the provision of a steering assembly, the rotating disc 1 and the grinding block 2 will deflect when moving to the curved pipe part;

[0044] S3. Due to the setting of the steering assembly, the rotation and grinding axis of the rotating disk 1 and the grinding block 2 is always the center line thereof, thereby achieving the effect of grinding the bend.

[0045] Working principle: When in use, it is first necessary to select an embodiment of the present invention of appropriate specifications according to the requirements of the sheet metal pipe to be processed. After grinding the outer surface of the sheet metal pipe, the rotating disc 1, the grinding block 2, and the connecting pipe 3 are inserted into the interior of the pipe, and then the external driving source is started to drive the connecting pipe 3 to rotate. The rotation of the connecting pipe 3 drives the rotating disc 1 and the grinding block 2 to rotate, so that the inner wall of the sheet metal pipe can be ground by the rotation of the grinding block 2. Furthermore, when encountering some curved pipes, the employee can still continue to feed the embodiment of the present invention into the sheet metal pipe. Due to the provision of a steering assembly, the rotating disc 1 and the grinding block 2 of the embodiment of the present invention will be deflected when moving to the curved pipe part, and even after deflection, they can still be driven to rotate by the external driving source, thereby achieving the effect of adapting to the curved pipe for grinding;

[0046] When grinding the bend part, the difficulty is that the rotation direction applied by the external driving source is certain, and when grinding the bend part, it is necessary to ensure that the rotation axis of the grinding piece changes at all times, otherwise uneven grinding will occur, resulting in the scrapping of the workpiece. When the embodiment of the present invention works on the bend part, the rotating disk 1 and the grinding block 2 will be deflected by the action of the pipeline, thereby driving the connecting pipe 3 to deflect, and the deflection of the connecting pipe 3 will drive the transmission block 5 and the clamping plate 6 to deflect, and since the clamping plate 6 is rotatably connected to the universal shaft 7, the rotating disk 1 and the grinding block 2 can be deflected normally, and at this time the connecting pipe 3 connected to the driving source rotates, the rotating disk 1 and the grinding block 2 can also rotate, and the rotation axis of the rotating disk 1 and the grinding block 2 is its center line, thereby achieving the effect of grinding the bend part;

[0047] The design of the fixing frame 8 allows the connection between the connecting pipe 3 and the transmission block 5 to facilitate the synchronous transmission of the transmission block 5 during the rotation of the connecting pipe 3, thereby achieving a transmission effect;

[0048] When grinding the inner wall of the pipe, it is not possible to effectively inject grinding fluid into the pipe from the outside, which easily leads to excessively high temperatures during grinding, causing high-temperature damage and cracking of the sheet metal pipe, resulting in the scrapping of the pipe fitting. Therefore, the water hole and the water spray trough 9 are provided. By injecting grinding fluid into the water hole and finally injecting it into the water spray trough 9 and spraying it out, the internal cooling effect of the grinder is achieved, the sheet metal pipe fitting is protected, and the grinding effect is improved.

[0049] Due to the provision of the universal joint 7, a pair of connecting pipes 3 will be relatively deflected when the elbow is actually being ground, and the rotation angles are different. If the pipe fittings are directly connected to the pair of connecting pipes 3 to transport the grinding fluid, the pipe fittings will inevitably be entangled with each other and become stuck, causing damage to the equipment. Therefore, a connecting block 4 is designed so that the connecting pipe 3 and the transmission block 5 are rotatably sealed inside the connecting block 4 and a cavity is left. At the same time, since a gap is left between the fixing frame 8 and the connecting pipe 3, that is, the fixing frame 8 does not completely block the water hole, the water hole inside the connecting pipe 3 can pass through the gap into the cavity inside the connecting block 4, and finally the grinding fluid in the two cavities is transported through the rubber tube 10, thus achieving the effect of steering transportation.

[0050] In the process of conveying the grinding fluid, the pair of connecting blocks 4 should be ensured as much as possible not to rotate with the connecting pipe 3 and the transmission block 5, so a connecting rod 11, a limit plate 12, and a rubber ring 13 are designed. After entering the interior of the pipe, the rubber ring 13 will adhere to the inner wall of the pipe, thereby exerting resistance to prevent the transmission block 5 connected to the limit plate 12 from rotating. The transmission block 5 close to the rotating disk 1 cannot be set to this mode because it needs to enter the curved pipe part. At this time, the material of the rubber tube 10 can be adjusted to make it have bending ability and a certain hardness. In the actual working process, the interior of the rubber tube 10 is filled with grinding fluid, so that the strength of the rubber tube 10 will have a certain prompt. In this way, the two transmission blocks 5 are connected by the rubber tube 10, which can effectively prevent the transmission block 5 from rotating. Furthermore, some filter holes can be started on the limit plate 12 to discharge the grinding fluid in some working conditions where vertical grinding is required.

[0051] In the actual grinding process, different rotational speeds require different amounts of grinding fluid. For this purpose, a closing plug 14 is designed. During the rotation of the rotating disk 1, it will simultaneously drive the closing plug 14 to rotate. Under the action of centrifugal force, the closing plug 14 compresses the return spring 15 and slides along the limit column 16, thereby separating the closing plug 14 from the vertical part of the water spray trough 9 and gradually exposing the V-shaped portion, allowing the grinding fluid to be discharged through the V-shaped portion. Through this design, the faster the rotational speed of the rotating disk 1, the larger the exposure range of the V-shaped portion, until it is completely exposed. As the V-shaped portion is exposed, the passage for the grinding fluid will increase, thereby increasing the discharge amount of the grinding fluid, thereby achieving the effect of adjusting the discharge amount of the grinding fluid according to the rotational speed. It should be noted that in the initial state, the closing plug 14 should be slidably sealed in the vertical part of the water spray trough 9;

[0052] By designing the adjustment magnet 17 and the electromagnet 18, in certain special cases, the electromagnet 18 can be turned on to exert a force on the adjustment magnet 17. This force acts on the return spring 15, thereby adjusting the force required by the closing plug 14 to compress the return spring 15 and deform it, thereby adapting to the grinding fluid discharge requirements under different speeds and conditions.

[0053] By designing the flow-breaking block 19 with a triangular cross section, the discharged grinding fluid can be diverted to prevent the grinding fluid from directly hitting the sealing plug 14 and generating backflow during discharge, thereby increasing the discharge rate of the grinding fluid.

[0054] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A sheet metal grinding machine, characterized in that: The invention comprises a rotating disk (1), a grinding block (2) is fixedly connected to the outside of the rotating disk (1), a connecting pipe (3) is fixedly connected to the bottom of the rotating disk (1), a steering assembly is installed at the bottom of the connecting pipe (3), the steering assembly is used to adjust the grinding angle of the rotating disk (1) and the grinding block (2), a connecting pipe (3) is installed at the bottom of the steering assembly, and the connecting pipe (3) at the bottom is connected to an external driving source; A water hole is provided inside the connecting pipe (3), and a plurality of "Y"-shaped water spray grooves (9) are provided inside the rotating disk (1), and the water hole is connected to the water spray grooves (9); The water trough (9) is divided into a vertical portion and a V-shaped portion. A closing plug (14) is slidably connected inside the rotating disk (1) and at a position corresponding to the vertical portion of the water trough (9). A return spring (15) is fixedly connected between the closing plug (14) and the rotating disk (1). A limiting column (16) is slidably connected inside the closing plug (14). The end of the limiting column (16) away from the closing plug (14) is fixedly connected to the rotating disk (1); The end of the closing plug (14) away from the return spring (15) is fixedly connected to a flow-breaking block (19), the cross section of the flow-breaking block (19) is triangular, and the angle of the side of the flow-breaking block (19) away from the closing plug (14) is adapted to the angle of the V-shaped portion of the water spout (9); The steering assembly comprises a pair of transmission blocks (5), a pair of clamping plates (6) are fixedly connected to the sides of the pair of transmission blocks (5) close to each other, the two pairs of clamping plates (6) are staggered, and a universal shaft (7) is rotatably connected between the two pairs of clamping plates (6). The pair of transmission blocks (5) are respectively arranged at the ends of the corresponding connecting pipes (3) and are connected through a connecting assembly, and the connecting assembly is used to connect the connecting pipe (3) and the transmission block (5) so that the connecting pipe (3) drives the transmission block (5) to rotate during the rotation process; A connecting block (4) is provided between each of the pair of connecting tubes (3) and the transmission block (5); a plurality of connecting rods (11) are fixedly connected to the outside of the connecting block (4) away from the rotating disk (1); one end of the connecting rod (11) away from the connecting block (4) is fixedly connected to a limiting disk (12); a rubber ring (13) is fixedly connected to the outside of the limiting disk (12); and the diameter of the rubber ring (13) is consistent with the diameter of the grinding block (2); An adjusting magnet (17) is fixedly connected to the interior of the closing plug (14), and a conducting electromagnet (18) is installed inside the rotating disk (1) at a position corresponding to the adjusting magnet (17).

2. The sheet metal grinding machine according to claim 1, characterized in that: The connecting component comprises a fixing frame (8), one end of the fixing frame (8) is fixedly connected to the transmission block (5), and the other end of the fixing frame (8) is fixedly connected to the inside of the connecting pipe (3), with a gap left between the fixing frame (8) and the connecting pipe (3).

3. The sheet metal grinding machine according to claim 1, characterized in that: The connecting tube (3) and the transmission block (5) are both sealed inside the connecting block (4), and a cavity is left between the connecting tube (3) and the transmission block (5). A plurality of rubber tubes (10) are connected between a pair of the connecting blocks (4), and the connection points between the rubber tubes (10) and the connecting blocks (4) are set within the range of the cavity.

4. A sheet metal grinding process, wherein the sheet metal grinding machine according to any one of claims 1 to 3 is used for processing, characterized in that: The following steps are involved: S1. Insert the rotating disc (1), the sanding block (2), and the connecting pipe (3) into the interior of the pipe fitting, and then start the external driving source to drive the connecting pipe (3) to rotate. The connecting pipe (3) rotates, thereby driving the rotating disc (1) and the sanding block (2) to rotate and perform sanding; S2. When encountering some curved pipes, the grinding machine is continuously fed into the interior of the sheet metal pipe. Due to the provision of a steering assembly, the rotating disc (1) and the grinding block (2) will deflect when moving to the curved pipe portion; S3. Due to the arrangement of the steering assembly, the rotation and grinding axes of the rotating disk (1) and the grinding block (2) are always their center lines, thereby achieving the effect of grinding the bends.

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