CN115056115A

CN115056115A - Electric automatic polishing device and polishing method

Info

Publication number: CN115056115A
Application number: CN202210846999.6A
Authority: CN
Inventors: 刘凯凯
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-07-07
Filing date: 2022-07-07
Publication date: 2022-09-16

Abstract

The device comprises a pipe fitting clamping mechanism, wherein the pipe fitting clamping mechanism comprises a mounting ring, the mounting ring is fixed at one end of a mandrel, an inner support body is sleeved at one side of the mandrel, and a plurality of outer clamping components are arranged in the circumferential direction of the mandrel; the pipe fitting polishing mechanism comprises a push rod, the push rod is connected with a driving assembly, the driving assembly is connected with a rotating shaft, and a plurality of polishing assemblies are arranged in the circumferential direction of the rotating shaft; the polishing assembly comprises a first telescopic rod, one end of the first telescopic rod is connected to the side wall of the rotating shaft, the other end of the first telescopic rod extends into the first damping block and is abutted against one end of the first damping spring, the other end of the first damping spring is abutted against the bottom wall of the first damping block, and the polishing head is mounted on one side, away from the first telescopic rod, of the first damping block. The application has solved the tubular metal resonator that needs to prepare the burnisher of multiple specification among the prior art to realize different internal diameters and has polished, and has the low and with high costs problem of production efficiency.

Description

Electric automatic polishing device and polishing method

Technical Field

The application belongs to the technical field of metal polishing, and particularly relates to an electric automatic polishing device and a polishing method.

Background

Metal processing refers to the production activities of human beings for processing metal elements or materials with metal characteristics mainly composed of metal elements, is a process technology for processing metal materials into articles, parts and components, and is widely applied to different fields of science, industry, artworks, handicraft and the like.

After the metal pipe fitting produced, just can put into production processing after transporting and saving in many ways, after shelving the longer time, inner wall and outer wall all can be by the oxidation, and the pipe fitting outer wall is polished the surface course through conventional grinding device, can realize that the top layer is smooth. When rust is generated on the inner wall of the pipe fitting, the pipe fitting is difficult to clean, and a common grinding device is difficult to finish grinding work, so that a special grinding tool is needed, the inner diameters of the metal pipes used at present are different, and grinding tools of different specifications are needed to be replaced during grinding, so that the production efficiency is low, and the cost is high.

Disclosure of Invention

The embodiment of the application provides an electric automation grinding device and a grinding method, and solves the problems that in the prior art, grinding tools of various specifications need to be prepared to realize grinding of metal pipes with different inner diameters, and production efficiency is low and cost is high.

In order to achieve the above object, an embodiment of the present invention provides an electrical automated polishing apparatus, including a pipe clamping mechanism and a pipe polishing mechanism;

the pipe fitting clamping mechanism comprises an inner support body, an outer clamping component, a mounting ring and a mandrel;

the mounting ring is coaxially fixed at one end of the mandrel, the inner support body is sleeved at one side of the mandrel, which is far away from the mounting ring, the outer wall of the inner support body is used for supporting the inner wall of the metal pipe, the number of the outer clamping assemblies is multiple, the multiple outer clamping assemblies are arranged in the circumferential direction of the mandrel, and the multiple outer clamping assemblies are used for clamping the metal pipe;

the pipe fitting polishing mechanism comprises a push rod, a driving assembly, a polishing assembly and a rotating shaft;

the front end of the push rod is connected to the rear end of the driving assembly, the front end of the driving assembly is connected to the rear end of the rotating shaft, the number of the grinding assemblies is multiple, and the plurality of the grinding assemblies are arranged in the circumferential direction of the rotating shaft;

the polishing assembly comprises a first telescopic rod, a polishing head, a first damping spring and a first damping block;

one end of the first telescopic rod is connected to the side wall of the rotating shaft, the other end of the first telescopic rod extends into the first damping block and is abutted against one end of the first damping spring, the other end of the first damping spring is abutted against the bottom wall of the first damping block, and the polishing head is installed on one side, away from the first telescopic rod, of the first damping block.

In one possible implementation, the outer clamping assembly includes an extension plate, a clamp plate, and a tightening nut;

one end of the extension plate is mounted on the mounting ring, one end of the screwing nut is screwed into the threaded hole in the extension plate and then is rotatably connected to one side of the clamping plate, and the other side of the clamping plate is used for abutting against the outer wall of the metal pipe; the number of the screwing nuts on each extension plate is more than two.

In a possible implementation manner, the mounting ring is provided with a plurality of mounting holes along the radial direction thereof, and one end of the extension plate is detachably mounted on the mounting ring through the mounting holes.

In one possible implementation, the inner support is a balloon, and an air inlet tube of the balloon passes through a hole in the mounting ring.

In one possible implementation manner, the mandrel is of a tubular structure, and one end of the mandrel, which is far away from the inner support body, is connected to an exhaust fan; the front end of the rotating shaft is provided with a propeller.

In a possible implementation manner, the push rod is a metal spring tube, and a positioning mechanism is sleeved on the push rod;

the positioning mechanism comprises a second telescopic rod, a travelling wheel, a second damping spring and a second damping block;

one end of the second telescopic rod is connected to the side wall of the push rod, the other end of the second telescopic rod extends into the second damping block and is abutted against one end of the second damping spring, the other end of the second damping spring is abutted against the bottom wall of the second damping block, and the travelling wheel is installed on one side, away from the second damping block, of the second telescopic rod.

In a possible implementation manner, a blind hole is formed in the rotating shaft along the axial direction of the rotating shaft, a clamping rod is arranged in the blind hole, and the clamping rod comprises a stud and more than one clamping assembly which are connected in sequence; the stud is installed in the blind hole in a threaded manner;

the side wall of the rotating shaft is provided with clamping holes along the radial direction;

the end part of the first telescopic rod extends into the clamping hole, a moving plate is clamped in the clamping hole, and a clamping spring is arranged between the moving plate and the first telescopic rod; a pushing block is arranged on one side, far away from the clamping spring, of the moving plate;

the grinding assemblies are arranged in a group in the same plane, and each group of grinding assemblies corresponds to one clamping assembly;

the clamping assembly comprises a conical block arranged at one end of the stud, and the inclined surface of the conical block is abutted to the end part of the pushing block.

The embodiment of the invention also provides an electric automatic polishing method, which comprises the following steps:

fix the one end of tubular metal resonator through pipe fitting fixture: the end part of the mandrel is extended into one end of the metal pipe, the inner support body is inflated through the air inlet pipe, the inner support body supports the inner wall of the metal pipe, and the air inlet pipe is closed when the inner support body reaches the set pressure;

installing the end part of the extension plate on the installation ring through the installation hole according to the outer diameter of the metal pipe, screwing a screwing nut, driving the clamping plate to move towards the metal pipe by screwing the nut, further enabling the plurality of outer clamping components to clamp the metal pipe, and enabling the two ends of the inner support body to extend to the outer sides of the two ends of the clamping plate;

polish through pipe fitting grinding machanism with one side inner wall of tubular metal resonator: the lengths of the first telescopic rods and the second telescopic rods are adjusted according to the inner diameter of the metal pipe, so that the first telescopic rods of the polishing assemblies are equal in length, and the second telescopic rods of the positioning mechanisms are equal in length;

placing the polishing assembly at the end part in the metal pipe, starting the driving assembly, driving the polishing assembly to rotate through the rotating shaft by the driving assembly, and polishing the inner wall of the metal pipe by the polishing head when the polishing assembly rotates;

after the polishing assembly polishes one section tubular metal resonator, will polish the subassembly through the push rod and to the inside propelling movement of tubular metal resonator, during the propelling movement, the second telescopic link supports the push rod, makes the push rod remove along the axis of tubular metal resonator through the walking wheel.

In a possible implementation mode, after the length of the first telescopic rod is adjusted, the stud is screwed, the conical block moves along the axis of the blind hole, the pushing block is driven to move along the radial direction of the rotating shaft when the conical block moves, and then the clamping spring is compressed, so that the polishing head forms set pressure on the inner wall of the metal pipe.

In one possible implementation mode, before the metal pipe is polished, the metal pipe is obliquely arranged, so that the pipe fitting clamping mechanism is positioned at the lower end of the metal pipe;

when the metal pipe is polished, the propeller at the front end of the rotating shaft rotates, waste residues generated by polishing are guided to the lower end of the metal pipe, and the waste residues move downwards under the action of the gravity of the waste residues;

and starting the exhaust fan, and drawing out the waste residues in the metal pipe by the exhaust fan through the mandrel.

One or more technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages:

the embodiment of the invention provides an electric automatic polishing device and a polishing method. The plurality of outer clamping assemblies can uniformly apply force in the circumferential direction of the metal pipe. First damping spring is compression state for the head of polishing can exert certain pressure to the metal pipe inner wall, in order to realize better effect of polishing, can carry out the shock attenuation to the head of polishing simultaneously, the protection head of polishing. This subassembly of polishing can realize the tubular metal resonator of different internal diameters through the length adjustment of first telescopic link and polish, therefore simple structure need not switch the burnisher of different specifications, therefore production efficiency is high, and with low costs. The method for polishing the metal pipe has the advantages that the metal pipe can be prevented from being deformed due to fixation in the polishing process, meanwhile, a better polishing effect can be achieved, the method can be suitable for polishing the metal pipes with different inner diameters, the method is simple to operate and easy to implement, and the polishing requirement of the inner wall of the existing metal pipe can be met.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings used in the description of the embodiments will be briefly introduced below. It is obvious that the drawings in the following description are only some of the embodiments described in the present application, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

Fig. 1 is a schematic structural diagram of a pipe clamping mechanism according to an embodiment of the present invention.

Fig. 2 is a schematic structural diagram of a pipe polishing mechanism according to an embodiment of the present invention.

Fig. 3 is an enlarged view of fig. 2 at a.

Fig. 4 is an enlarged view of fig. 2 at B.

Reference numerals: 1-a metal tube; 2-internal support; 21-air bag; 22-an air inlet pipe; 3-mounting a ring; 4-mandrel; 5-an outer clamping assembly; 51-an extension plate; 52-a splint; 53-screwing the nut; 6-a push rod; 7-a drive assembly; 8-grinding the component; 81-a first telescopic rod; 82-grinding head; 83-a first damping spring; 84-a first snubber block; 9-a positioning mechanism; 91-a second telescopic rod; 92-a road wheel; 93-a second snubber block; 10-a propeller; 11-a rotating shaft; 12-a clamping bar; 13-a stud; 14-a clamping assembly; 15-clamping holes; 16-moving the plate; 17-a clamping spring; 18-a push block; 19-tapered block.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the embodiments of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have specific orientations, be configured in specific orientations, and operate, and thus, should not be construed as limiting the present invention. The terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. Specific meanings of the above terms in the embodiments of the present invention can be understood by those of ordinary skill in the art according to specific situations.

As shown in fig. 1 to 4, an electrical automated polishing apparatus and a polishing method provided in an embodiment of the present invention include a pipe clamping mechanism and a pipe polishing mechanism.

The tube gripping mechanism includes an inner support body 2, an outer gripping assembly 5, a mounting ring 3, and a mandrel 4.

The coaxial one end of being fixed in dabber 4 of collar 3, the one side of collar 3 is kept away from to dabber 4 to inner support body 2 suit, and the outer wall of inner support body 2 is used for supporting the inner wall of tubular metal resonator 1, and the quantity of outer centre gripping subassembly 5 is a plurality of, and a plurality of outer centre gripping subassemblies 5 set up in the circumference of dabber 4, and a plurality of outer centre gripping subassemblies 5 are used for centre gripping tubular metal resonator 1.

The pipe fitting grinding mechanism comprises a push rod 6, a driving assembly 7, a grinding assembly 8 and a rotating shaft 11.

The front end of push rod 6 is connected in the rear end of drive assembly 7, and the front end of drive assembly 7 is connected in the rear end of pivot 11, and the quantity of the subassembly 8 of polishing is a plurality of, and a plurality of subassemblies 8 of polishing set up in the circumference of pivot 11.

The sanding assembly 8 includes a first telescoping rod 81, a sanding head 82, a first shock absorbing spring 83, and a first shock absorbing block 84.

One end of the first telescopic rod 81 is connected to the side wall of the rotating shaft 11, the other end of the first telescopic rod 81 extends into the first damping block 84 and is abutted against one end of the first damping spring 83, the other end of the first damping spring 83 is abutted against the bottom wall of the first damping block 84, and the polishing head 82 is installed on one side, away from the first telescopic rod 81, of the first damping block 84.

It should be noted that the outer wall of the inner support body 2 is used for supporting the inner wall of the metal tube 1, so that when the outer clamping assembly 5 applies force to clamp the metal tube 1, the metal tube 1 is not extruded and deformed, thereby maintaining the current shape structure of the metal tube 1. The plurality of outer clamp assemblies 5 can apply force uniformly in the circumferential direction of the metal pipe 1.

The driving assembly 7 comprises a shell, a motor and a reduction gear set, wherein the motor and the reduction gear set are arranged in the shell, two ends of the shell are respectively connected to the push rod 6 and the rotating shaft 11, the shell and the rotating shaft 11 are in rotating connection, and the motor drives the rotating shaft 11 to rotate through the reduction gear set.

First damping spring 83 is compression state for the head 82 of polishing can exert certain pressure to tubular metal resonator 1 inner wall, with the better effect of polishing of realization, can carry out the shock attenuation to the head 82 of polishing simultaneously, protects the head 82 of polishing. This subassembly 8 of polishing can realize through the length adjustment of first telescopic link 81 that tubular metal resonator 1 of different internal diameters polishes, therefore simple structure need not switch the burnisher of different specifications, therefore production efficiency is high, and with low costs.

In this embodiment, the outer clamping assembly 5 includes an extension plate 51, a clamping plate 52, and a tightening nut 53, one end of the extension plate 51 is mounted on the mounting ring 3, one end of the tightening nut 53 is screwed into a threaded hole of the extension plate 51 and then rotatably connected to one side of the clamping plate 52, and the other side of the clamping plate 52 is used for abutting against the outer wall of the metal pipe 1. The number of the tightening nuts 53 on each extension plate 51 is two or more.

It should be noted that, tightening the tightening nut 53 can drive the clamping plate 52 to move, and then fix the metal tube 1 through the plurality of outer clamping assemblies 5, and the length of the extension plate 51 can be selected according to the length of the metal tube 1, so as to achieve a better fixing effect. The tightening of the two or more nuts 53 makes the pressure applied to the metal pipe 1 by the clamping plate 52 more uniform, further protecting the metal pipe 1 from deformation.

In this embodiment, the mounting ring 3 is provided with a plurality of mounting holes along the radial direction thereof, and one end of the extension plate 51 is detachably mounted on the mounting ring 3 through the mounting holes.

It should be noted that after one end of the extension plate 51 is fixed to different mounting holes, the plurality of outer clamping assemblies 5 can form clamping spaces of different sizes, thereby satisfying the requirements for fixing pipelines of various sizes.

In this embodiment, the inner support 2 is a balloon 21, and an air inlet tube 22 of the balloon 21 passes through a hole in the mounting ring 3.

It should be noted that, the supporting of the inner wall of the metal tube 1 is realized by the air bag 21, which not only applies force uniformly, but also is convenient for disassembly and assembly, so that the use effect is good.

In this embodiment, the mandrel 4 is a tubular structure, and one end of the mandrel 4 away from the inner support body 2 is connected to the exhaust fan. A propeller 10 is provided at the front end of the rotary shaft 11.

It should be noted that the screw 10 at the front end of the rotating shaft 11 can guide the ground waste residue to the other end of the pipeline, so as to optimize the working environment of the worker on the side, and the waste residue in the pipeline can be discharged through the mandrel 4 by using the exhaust fan, so that the problem that the waste residue affects the normal work of the grinding assembly 8 is prevented.

In this embodiment, the push rod 6 is a metal spring tube, and the push rod 6 is sleeved with the positioning mechanism 9.

The positioning mechanism 9 includes a second telescopic rod 91, a traveling wheel 92, a second damping spring, and a second damping block 93.

One end of the second telescopic rod 91 is connected to the side wall of the push rod 6, the other end of the second telescopic rod 91 extends into the second damping block 93 and is abutted against one end of the second damping spring, the other end of the second damping spring is abutted against the bottom wall of the second damping block 93, and the walking wheel 92 is installed on one side, far away from the second telescopic rod 91, of the second damping block 93.

It should be noted that the metal spring tube can be bent but cannot be compressed, so that the push rod 6 can pass through the metal tube 1 with a certain radian, and then the polishing assembly 8 is driven to move in the metal tube 1.

The structural style of positioning mechanism 9 and the structural style of subassembly 8 of polishing are similar, all have shock-absorbing function, and positioning mechanism 9 can support push rod 6, makes push rod 6 remove along the axis of tubular metal resonator 1 through walking wheel 92, prevents to a certain extent that subassembly 8 of polishing from inclining to guarantee that subassembly 8 of polishing is to the even application of force of tubular metal resonator 1's inner wall, consequently improved the effect after polishing.

In this embodiment, a blind hole is axially formed in the rotating shaft 11, a clamping rod 12 is disposed in the blind hole, and the clamping rod 12 includes a stud 13 and more than one clamping assembly 14 which are connected in sequence. The stud 13 is threadedly mounted in the blind hole.

The side wall of the rotary shaft 11 is provided with a clamping hole 15 along a radial direction thereof.

The end of the first telescopic rod 81 extends into the clamping hole 15, the moving plate 16 is clamped in the clamping hole 15, and a clamping spring 17 is arranged between the moving plate 16 and the first telescopic rod 81. The moving plate 16 is provided with a pushing block 18 at a side away from the clamping spring 17.

One of the plurality of grinding assemblies 8 in the same plane is a group, and each group of grinding assemblies 8 corresponds to one clamping assembly 14.

The clamping assembly 14 comprises a conical block 19 arranged at one end of the stud 13, and the inclined surface of the conical block 19 is abutted with the end part of the pushing block 18.

It should be noted that a plurality of the subassembly 8 of polishing of this embodiment are two sets of, and two sets of 8 intervals of the subassembly of polishing set up, and such structure can improve the efficiency of polishing, is convenient for realize the centering of the subassembly 8 of polishing simultaneously, prevents to a certain extent that the subassembly 8 of polishing from inclining.

The clamping assembly 14 of this embodiment is two, and the conical blocks 19 of the two clamping assemblies 14 are connected by a connecting rod.

The stud 13 is rotated to drive the conical block 19 to move transversely, the surface of the conical block 19 is a conical surface, so that the pushing block 18 can be driven to move perpendicular to the axis of the conical block 19, after the conical block 19 moves, the clamping spring 17 between the moving plate 16 and the first telescopic rod 81 is compressed, the polishing head 82 forms set pressure on the inner wall of the metal pipe 1, the pressure can be changed by adjusting the position of the conical block 19, and different polishing effects are achieved.

As shown in fig. 1 to 4, an embodiment of the present invention further provides an electrical automated polishing method, which includes the following steps:

fix the one end of tubular metal resonator 1 through pipe fitting fixture: the end part of the mandrel 4 is extended into one end of the metal pipe 1, the inner support body 2 is inflated through the air inlet pipe 22, so that the inner support body 2 supports the inner wall of the metal pipe 1, and when the inner support body 2 reaches the set pressure, the air inlet pipe 22 is closed.

The end part of the extension plate 51 is installed on the installation ring 3 through the installation hole according to the outer diameter of the metal pipe 1, the screwing nut 53 is screwed, the screwing nut 53 drives the clamping plate 52 to move towards the metal pipe 1, the plurality of outer clamping components 5 clamp the metal pipe 1, and at the moment, the two ends of the inner support body 2 extend to the outer sides of the two ends of the clamping plate 52.

Polish one side inner wall of tubular metal resonator 1 through pipe fitting grinding machanism: the lengths of the first telescopic rods 81 and the second telescopic rods 91 are adjusted according to the inner diameter of the metal pipe 1, so that the first telescopic rods 81 of the plurality of grinding assemblies 8 are equal in length, and the second telescopic rods 91 of the plurality of positioning mechanisms 9 are equal in length.

The end part of the grinding assembly 8 in the metal pipe 1 is placed, the driving assembly 7 is started, the driving assembly 7 drives the grinding assembly 8 to rotate through the rotating shaft 11, and the grinding head 82 grinds the metal pipe 1 when the grinding assembly 8 rotates.

After polishing assembly 8 and having polished a section tubular metal resonator 1, will polish assembly 8 through push rod 6 to the inside propelling movement of tubular metal resonator 1, during the propelling movement, second telescopic link 91 supports push rod 6, makes push rod 6 remove along the axis of tubular metal resonator 1 through walking wheel 92.

It should be noted that by polishing the metal pipe 1 by the method, the problem that the metal pipe 1 is deformed due to fixation in the polishing process can be prevented, and meanwhile, a better polishing effect can be realized.

In this embodiment, after the length of the first telescopic rod 81 is adjusted, the stud 13 is screwed to move the conical block 19 along the axis of the blind hole, and when the conical block 19 moves, the pushing block 18 is driven to move along the radial direction of the rotating shaft 11, so that the clamping spring 17 is compressed, and the polishing head 82 forms a set pressure on the inner wall of the metal tube 1.

It should be noted that different polishing force levels can be formed by changing the pressure applied by the polishing head 82 to the inner wall of the metal pipe 1. The magnitude of the pressure can be obtained by calculating the compression amount of the clamping spring 17, namely, the pressure applied by the polishing head 82 to the inner wall of the metal pipe 1 is controlled by controlling the screwing length of the stud 13.

In this embodiment, before tubular metal resonator 1 polishes, set up tubular metal resonator 1 slope, make pipe fitting fixture be located the lower one end of tubular metal resonator 1.

When the metal pipe 1 is polished, the propeller 10 at the front end of the rotating shaft 11 rotates to guide the waste slag generated by polishing to the lower end of the metal pipe 1, and the waste slag moves downwards under the action of the gravity of the waste slag.

And starting the exhaust fan, and extracting the waste residues in the metal pipe 1 by the exhaust fan through the mandrel 4.

It should be noted that the inner support body 2 is adopted to support the inner wall of the metal pipe 1, so that waste slag is not easy to discharge at the end, and the waste slag can be well discharged through the exhaust fan and the propeller 10, so that the polishing effect is improved.

In this embodiment, it is apparent to those skilled in the art that the present invention is not limited to the details of the above-described exemplary embodiments, and can be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Claims

1. The utility model provides an electric automatization grinding device which characterized in that: comprises a pipe fitting clamping mechanism and a pipe fitting polishing mechanism;

the pipe fitting clamping mechanism comprises an inner support body (2), an outer clamping component (5), a mounting ring (3) and a mandrel (4);

the mounting ring (3) is coaxially fixed at one end of the mandrel (4), the inner supporting body (2) is sleeved at one side, far away from the mounting ring (3), of the mandrel (4), the outer wall of the inner supporting body (2) is used for supporting the inner wall of the metal pipe (1), the number of the outer clamping assemblies (5) is multiple, the plurality of the outer clamping assemblies (5) are arranged in the circumferential direction of the mandrel (4), and the plurality of the outer clamping assemblies (5) are used for clamping the metal pipe (1);

the pipe fitting polishing mechanism comprises a push rod (6), a driving assembly (7), a polishing assembly (8) and a rotating shaft (11);

the front end of the push rod (6) is connected to the rear end of the driving assembly (7), the front end of the driving assembly (7) is connected to the rear end of the rotating shaft (11), the number of the grinding assemblies (8) is multiple, and the plurality of grinding assemblies (8) are arranged in the circumferential direction of the rotating shaft (11);

the sanding assembly (8) comprises a first telescopic rod (81), a sanding head (82), a first damping spring (83) and a first damping block (84);

one end of the first telescopic rod (81) is connected to the side wall of the rotating shaft (11), the other end of the first telescopic rod (81) extends into the first damping block (84) and is abutted to one end of the first damping spring (83), the other end of the first damping spring (83) is abutted to the bottom wall of the first damping block (84), and the polishing head (82) is installed on one side, away from the first telescopic rod (81), of the first damping block (84).

2. The electrically automated grinding apparatus of claim 1, wherein: the outer clamping assembly (5) comprises an extension plate (51), a clamping plate (52) and a tightening nut (53);

one end of the extension plate (51) is mounted on the mounting ring (3), one end of the screwing nut (53) is screwed into a threaded hole in the extension plate (51) and then is rotatably connected to one side of the clamping plate (52), and the other side of the clamping plate (52) is used for being abutted to the outer wall of the metal pipe (1); the number of the tightening nuts (53) on each extension plate (51) is two or more.

3. The electrically automated grinding apparatus of claim 2, wherein: the mounting ring (3) is provided with a plurality of mounting holes along the radial direction, and one end of the extension plate (51) is detachably mounted on the mounting ring (3) through the mounting holes.

4. The electrically automated grinding apparatus of claim 1, wherein: the inner support body (2) is an air bag (21), and an air inlet pipe (22) of the air bag (21) penetrates through a hole in the mounting ring (3).

5. The electrically automated grinding apparatus of claim 1, wherein: the mandrel (4) is of a tubular structure, and one end, far away from the inner support body (2), of the mandrel (4) is connected to an exhaust fan; the front end of the rotating shaft (11) is provided with a propeller (10).

6. The electrically automated grinding apparatus of claim 1, wherein: the push rod (6) adopts a metal spring tube, and a positioning mechanism (9) is sleeved on the push rod (6);

the positioning mechanism (9) comprises a second telescopic rod (91), a travelling wheel (92), a second damping spring and a second damping block (93);

the one end of second telescopic link (91) connect in the lateral wall of push rod (6), the other end of second telescopic link (91) stretch into in second snubber block (93) and with second snubber spring's one end butt, second snubber spring's the other end with diapire butt in second snubber block (93), walking wheel (92) install in second snubber block (93) are kept away from one side of second telescopic link (91).

7. The electrically automated grinding apparatus of claim 1, wherein: a blind hole is formed in the rotating shaft (11) along the axial direction of the rotating shaft, a clamping rod (12) is arranged in the blind hole, and the clamping rod (12) comprises a stud (13) and more than one clamping assembly (14) which are sequentially connected; the stud (13) is arranged in the blind hole in a threaded manner;

the side wall of the rotating shaft (11) is provided with a clamping hole (15) along the radial direction;

the end part of the first telescopic rod (81) extends into the clamping hole (15), a moving plate (16) is clamped in the clamping hole (15), and a clamping spring (17) is arranged between the moving plate (16) and the first telescopic rod (81); a pushing block (18) is arranged on one side, away from the clamping spring (17), of the moving plate (16);

the grinding assemblies (8) are arranged in a group in the same plane, and each group of grinding assemblies (8) corresponds to one clamping assembly (14);

the clamping assembly (14) comprises a conical block (19) arranged at one end of the stud (13), and the inclined surface of the conical block (19) is abutted against the end part of the pushing block (18).

8. An electrical automated polishing method, comprising the steps of:

fix the one end of tubular metal resonator (1) through pipe fitting fixture: the end part of the mandrel (4) extends into one end of the metal pipe (1), the inner support body (2) is inflated through the air inlet pipe (22), so that the inner support body (2) supports the inner wall of the metal pipe (1), and the air inlet pipe (22) is closed when the inner support body (2) reaches a set pressure;

the end part of the extension plate (51) is installed on the installation ring (3) through the installation hole according to the outer diameter of the metal pipe (1), the screwing nut (53) is screwed, the screwing nut (53) drives the clamping plate (52) to move towards the metal pipe (1), then the metal pipe (1) is clamped by the outer clamping components (5), and at the moment, the two ends of the inner support body (2) extend to the outer sides of the two ends of the clamping plate (52);

polish one side inner wall of tubular metal resonator (1) through pipe fitting grinding machanism: the lengths of the first telescopic rods (81) and the second telescopic rods (91) are adjusted according to the inner diameter of the metal pipe (1), so that the first telescopic rods (81) of the plurality of grinding assemblies (8) are equal in length, and the second telescopic rods (91) of the plurality of positioning mechanisms (9) are equal in length;

placing the polishing assembly (8) at the end part in the metal pipe (1), starting the driving assembly (7), driving the polishing assembly (8) to rotate by the driving assembly (7) through the rotating shaft (11), and polishing the inner wall of the metal pipe (1) by the polishing head (82) when the polishing assembly (8) rotates;

after the polishing component (8) polishes one section of metal pipe (1), the polishing component (8) is pushed towards the inside of the metal pipe (1) through the push rod (6), and during pushing, the second telescopic rod (91) supports the push rod (6), so that the push rod (6) moves along the axis of the metal pipe (1) through the walking wheel (92).

9. The electrically automated sanding method of claim 8, wherein: after the length of the first telescopic rod (81) is adjusted, the stud (13) is screwed to enable the conical block (19) to move along the axis of the blind hole, the conical block (19) drives the pushing block (18) to move along the radial direction of the rotating shaft (11) when moving, and then the clamping spring (17) is compressed, so that the polishing head (82) forms set pressure on the inner wall of the metal pipe (1).

10. The electrically automated sanding method of claim 8, wherein: before the metal pipe (1) is polished, the metal pipe (1) is obliquely arranged, so that the pipe fitting clamping mechanism is positioned at the lower end of the metal pipe (1);

when the metal pipe (1) is polished, a propeller (10) at the front end of a rotating shaft (11) rotates, waste residues generated by polishing are guided to the lower end of the metal pipe (1), and the waste residues move downwards under the action of gravity of the waste residues;

and starting the exhaust fan, and drawing out the waste residue in the metal pipe (1) through the mandrel (4).