Polishing structure and metal curved surface special-shaped polishing machine thereof

Abstract

The invention belongs to the field of special-shaped structure polishing, and discloses a polishing structure and a metal curved surface special-shaped polishing machine.The polishing structure comprises a supporting frame, an adjusting assembly and a polishing assembly, the supporting frame comprises an outer supporting ring, a middle supporting ring and an inner supporting ring, and the inner side of the outer supporting ring is slidably connected with the middle supporting ring; and an inner supporting ring is slidably connected to the inner side of the middle supporting ring, an adjusting assembly is arranged on the upper end face of the supporting frame, synchronous rings are fixed under the multiple large threaded rods, at least one supporting rod is fixed to the lower end face of each synchronous ring at equal intervals, and a polishing assembly is fixed to the lower end of the sealing cylinder. When the polishing rings rotate, corresponding polishing liquid can be automatically dropwise added, and when one set of polishing rings polish the edge of the protrusion, the outer polishing ring can be blocked between the protrusion and the polishing ring in work, so that the side wall of the protrusion is protected.

Description

Technical Field

[0001] The present invention belongs to the field of polishing of special-shaped structures, and in particular relates to a polishing structure and a special-shaped polishing machine for a metal curved surface. Background Art

[0002] In the surface treatment of building materials, in order to enhance their eye-catching degree and beauty, they are usually sprayed with paints of different effects on the outside. These paints can not only enhance the appearance of the building, but also provide an additional layer of protection and extend the service life of the material. For different paint polishing, it is necessary to select a polishing ring with a suitable abrasive particle size.

[0003] When a material has multiple paint surfaces, it needs to be polished multiple times, and polishing rings with different abrasive sizes need to be replaced for different paint surfaces. In addition, polishing liquid needs to be reapplied after the sandpaper is replaced, which makes the operation complicated and inconvenient to use. Summary of the invention

[0004] In view of the deficiencies of the prior art, the purpose of the present invention is to provide a polishing structure and a metal curved and special-shaped polishing machine thereof, which solves the problem in the prior art that there are multiple paint surfaces on one polishing material, and the multiple paint surfaces require re-applying polishing liquid and replacing polishing rings.

[0005] The object of the present disclosure can be achieved by the following technical solutions: a polishing structure, including a support frame, an adjustment assembly and a polishing assembly;

[0006] The support frame comprises an outer support ring, a middle support ring and an inner support ring, and the inner side of the outer support ring is slidably connected to the middle support ring, and the inner side of the middle support ring is slidably connected to the inner support ring;

[0007] The inner sides of the outer support ring, the middle support ring and the inner support ring are all penetrated with at least one limiting hole, and the lower ends of the plurality of limiting holes are fixed with threaded seats, and the inner sides of the threaded seats are penetrated with a large threaded rod, the upper end surface of the large threaded rod is fixed with a threaded groove, and the upper end surface of the support frame is provided with an adjustment component;

[0008] A synchronization ring is fixed directly below the plurality of large threaded rods, and at least one support rod is fixed equidistantly on the lower end surface of the synchronization ring, a piston is fixed on the lower end surface of the support rod, and a sealing cylinder is sealed on the outer wall of the piston, and a polishing assembly is fixed on the lower end of the sealing cylinder;

[0009] The polishing assembly comprises an outer polishing ring, a middle polishing ring and an inner polishing ring. The inner polishing ring is located directly below the inner support ring, and the middle polishing ring is arranged on the outer side of the inner polishing ring, and the outer polishing ring is arranged on the outer side of the middle polishing ring.

[0010] In some disclosures, a plurality of support springs are fixed between the synchronizer ring and the support frame, a mounting seat corresponding to the position of the limiting hole is fixed to the upper end surface of the synchronizer ring, and a guide rod passing through the synchronizer ring is provided between the synchronizer ring and the support frame.

[0011] In some disclosures, the adjustment assembly includes an electric telescopic rod, a fixed seat, a micro motor, a telescopic sleeve and a return spring, and the upper end surface of the support frame is provided with an electric telescopic rod, and the output end of the electric telescopic rod is fixed with a fixed seat, a telescopic sleeve is penetrated through the inner side of the fixed seat, and the upper end of the telescopic sleeve is connected to a micro motor, and a return spring is arranged around the outer side of the telescopic sleeve.

[0012] In some disclosures, a small threaded rod is fixed to the lower end surface of the telescopic sleeve, and the shape of the small threaded rod is adapted to the shape of the threaded groove.

[0013] In some disclosures, limiting protrusions are fixed at the centers of both inner and outer sides of the middle support ring, and guide rails are fixed to the inner side of the outer support ring and the outer side of the inner support ring, and the limiting protrusions are adapted to the structure of the guide rails.

[0014] In some disclosures, a discharge seat is provided through the upper end of the polishing assembly, a tension spring is fixed on the inner side of the discharge seat, a sealing plug is fixed on the upper end of the tension spring, and a sealing hole is fixed on the upper end of the discharge seat.

[0015] In some disclosures, the discharge seat is sealed and connected to the sealing cylinder.

[0016] In some disclosures, a protective component is fixed to the lower end face of the polishing component, and the protective component includes a rubber belt, a fixed ring and a guide ring, guide rings are fixed at both side edges of the middle polishing ring, and the lower end of the guide ring is slidably connected to the fixed ring, and a guide rubber belt is fixed to the lower end of the fixed ring.

[0017] In some disclosures, a support shaft is disposed through the center of the support frame.

[0018] In some disclosures, a metal curved and shaped polishing machine includes a polishing structure, a support cover and a servo motor. The upper end of the support shaft is connected to the output end of the servo motor, and a support cover is fixed to the outer side of the servo motor.

[0019] The nouns, conjunctions or adjectives involved in the above technical solution are explained as follows:

[0020] A fixed connection is one where the parts or components are fixed without any relative movement;

[0021] A rotational connection is a connection between parts that allows the parts to rotate relative to each other;

[0022] Threaded connection is a detachable fixed connection with the advantages of simple structure, reliable connection, and convenient assembly and disassembly. It is widely used in the fields of mechanical engineering and connection structures.

[0023] A sliding connection is a connection between parts that allows the parts to slide against each other.

[0024] Beneficial effects of the present disclosure:

[0025] Through multiple support rings and multiple polishing rings on the support frame, and the upper end of each polishing ring is provided with a corresponding polishing liquid, and the polishing ring that matches the paint surface is selected and rotated through the adjustment component, and the corresponding polishing liquid can be automatically dripped while the polishing ring rotates, and when a group of polishing rings polish to the edge of the protrusion, the outer polishing ring can be blocked between the protrusion and the working polishing ring, thereby protecting the side wall of the protrusion. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 is a schematic diagram of the overall structure of the polishing structure of an embodiment of the present disclosure;

[0028] Figure 2 is a schematic diagram of the threaded rod connection structure of the adjustment assembly of the embodiment of the present disclosure;

[0029] Figure 3 is a schematic diagram of the internal structure of the piston rod and the sealing cylinder of an embodiment of the present disclosure;

[0030] Figure 4 is a schematic cross-sectional view of a polishing assembly according to an embodiment of the present disclosure;

[0031] Figure 5 is a schematic diagram of the overall structure of the polishing machine according to an embodiment of the present disclosure;

[0032] Figure 6 is a schematic diagram of the structure of the support frame viewed from above according to an embodiment of the present disclosure;

[0033] Figure 7 This is an embodiment of the present disclosure Figure 6 Schematic diagram of the AA section structure.

[0034] In the figure: 1, support frame; 101, outer support ring; 102, middle support ring; 103, inner support ring; 1021, limit protrusion; 1022, guide rail; 2, adjustment component; 21, electric telescopic rod; 22, fixing seat; 23, micro motor; 24, telescopic sleeve; 25, reset spring; 241, small threaded rod; 3, limit hole; 4, threaded seat; 5, large threaded rod; 51, threaded groove; 6, synchronization ring; 61, mounting seat; 62. Support spring; 63. Guide rod; 7. Support rod; 71. Piston; 8. Sealing cylinder; 81. Discharge seat; 811. Tension spring; 812. Sealing plug; 813. Sealing hole; 9. Polishing assembly; 91. Outer polishing ring; 92. Middle polishing ring; 93. Inner polishing ring; 10. Protection assembly; 1001. Rubber belt; 1002. Fixed ring; 1003. Guide ring; 11. Support shaft; 12. Support cover; 13. Servo motor. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0036] According to the concept of this application, Figures 1 to 7 The embodiment of the polishing structure and its metal curved and special-shaped polishing machine is described below. Specifically, the polishing structure is constructed as a split structure, which has three components, namely, a support frame 1, an adjustment component 2, and a polishing component 9. Through multiple support rings and multiple polishing rings on the support frame 1, and the upper end of each polishing ring is provided with a corresponding polishing liquid, and the polishing ring adapted to the paint surface is selected and rotated through the adjustment component 2, and the corresponding polishing liquid can be automatically dripped while the polishing ring rotates, and when a group of polishing rings polish to the edge of the protrusion, the outer polishing ring 91 can be blocked between the protrusion and the working polishing ring, thereby protecting the side wall of the protrusion.

[0037] Please refer to Figures 1 to 7 , comprising a support frame 1, an adjustment component 2 and a polishing component 9;

[0038] The support frame 1 comprises an outer support ring 101, a middle support ring 102 and an inner support ring 103, wherein the inner side of the outer support ring 101 is slidably connected to the middle support ring 102, and the inner side of the middle support ring 102 is slidably connected to the inner support ring 103;

[0039] At least one limiting hole 3 is provided through the inner sides of the outer support ring 101, the middle support ring 102 and the inner support ring 103, and a threaded seat 4 is fixed at the lower end of the plurality of limiting holes 3, and a large threaded rod 5 is provided through the inner side of the threaded seat 4, and a threaded groove 51 is fixed on the upper end surface of the large threaded rod 5, and an adjustment component 2 is provided on the upper end surface of the support frame 1;

[0040] A synchronization ring 6 is fixed directly below the plurality of large threaded rods 5, and at least one support rod 7 is fixed equidistantly to the lower end surface of the synchronization ring 6, a piston 71 is fixed to the lower end surface of the support rod 7, and a sealing cylinder 8 is sealed on the outer wall of the piston 71, and a polishing assembly 9 is fixed to the lower end of the sealing cylinder 8;

[0041] The polishing assembly 9 includes an outer polishing ring 91 , a middle polishing ring 92 and an inner polishing ring 93 . The inner polishing ring 93 is located directly below the inner support ring 103 , and the middle polishing ring 92 is arranged on the outer side of the inner polishing ring 93 , and the outer polishing ring 91 is arranged on the outer side of the middle polishing ring 92 .

[0042] When in use, the adjusting component 2 moves to the upper end of the outer support ring 101, and the lower end of the adjusting component 2 is inserted into the threaded groove 51 in the large threaded rod 5, so that the output end of the adjusting component 2 is connected to the large threaded rod 5. When the output end of the adjusting component 2 rotates, it can drive the large threaded rod 5 to rotate along its axis, and drive the large threaded rod 5 to rotate downward along the threaded seat 4, so that the synchronous ring 6 and the multiple support rods 7 slide vertically downward, so that the piston 71 at the bottom of the support rod 7 squeezes the polishing liquid in the sealing tube 8 until the piston 71 is against the bottom end of the inner wall of the sealing tube 8, and the polishing liquid passes through the through hole on the polishing component 9 and drips onto the polishing material. As the large threaded rod 5 continues to rotate , so that the synchronous ring 6 and the support rod 7 continue to squeeze the outer polishing ring 91 downward, thereby causing the outer polishing ring 91 to bulge downward until the lower end surface of the outer polishing ring 91 contacts the polishing material, thereby polishing it. After the polishing is completed, by reversing the adjustment component 2, the output end of the adjustment component 2 drives the large threaded rod 5 and the synchronous ring 6 to move upward, so that the upper end surface of the piston 71 contacts the upper end of the inner wall of the sealing tube 8, and then the large threaded rod 5 continues to rotate, which can drive the sealing tube 8 and the outer polishing ring 91 to move vertically upward, until the upper end surface of the large threaded rod 5 coincides with the upper end surface of the outer support ring 101, and the outer support ring 101 is separated from the polishing material, thereby being reset.

[0043] The polishing assembly 9 includes an outer polishing ring 91, a middle polishing ring 92 and an inner polishing ring 93, and the three polishing rings of the outer polishing ring 91, the middle polishing ring 92 and the inner polishing ring 93 have different abrasive grain sizes, so that when polishing the same polishing material for different paint surfaces, the other paint surfaces can be adapted to the corresponding polishing rings without restarting by adjusting the assembly 2, and each polishing assembly 9 can re-drip the polishing liquid adapted to the paint surface on the corresponding polishing material before contacting the polishing material, so that there is no need for manual re-drip, and the abrasive grain sizes among the inner polishing ring 93, the middle polishing ring 92 and the outer polishing ring 91 are arranged from coarse to fine. , so that when the smoother paint surface is in a convex state and the rough paint surface is polished first, the inner polishing ring 93 protrudes downward and polishes with the rough paint surface, while the outer polishing ring 91 is in a stationary state and its side wall is against the convex side wall, thereby reducing the contact area between the inner polishing ring 93 and the convex part of the polishing material, thereby protecting the smooth paint surface, and because the abrasive particle size of the outer polishing ring 91 is the finest, even if the outer polishing ring 91 is affected by the rotation of the inner polishing ring 93 and friction occurs between the smooth paint surface, the finer the abrasive particle size, the less damage to the smooth paint surface is caused compared with the outer polishing ring 91 with a coarser abrasive particle size, thereby protecting the smooth paint surface.

[0044] A support spring 62 is fixed between the synchronizer ring 6 and the support frame 1 , a mounting seat 61 corresponding to the position of the limiting hole 3 is fixed to the upper end surface of the synchronizer ring 6 , and a guide rod 63 penetrating the synchronizer ring 6 is provided between the synchronizer ring 6 and the support frame 1 .

[0045] A support spring 62 is fixed between the synchronous ring 6 and the support frame 1. Initially, the support spring 62 is in the original length state, and at this time, the upper end surface of the large threaded rod 5 coincides with the inner bottom surface of the limiting hole 3, and the limiting hole 3 is a countersunk hole. If the support spring 62 on the inner support ring 103 passes through the corresponding synchronous ring 6, when the electric telescopic rod 21 drives the outer support ring 101 to rotate, the electric telescopic rod 21 will interfere with the protruding part of the large threaded rod 5 on the inner support ring 103, thereby affecting the rotation of the electric telescopic rod 21. Since the multiple support springs 62 provide an upward pulling force to the synchronous ring 6, the synchronous ring 6 has an upward movement trend, and when the synchronous ring 6 rotates, it will vibrate. The traction of the support spring 62 can reduce the movement of the synchronous ring 6 relative to the components, thereby preventing other polishing liquids from being squeezed out during use.

[0046] The adjustment component 2 includes an electric telescopic rod 21, a fixed seat 22, a micro motor 23, a telescopic sleeve 24 and a reset spring 25, and the upper end surface of the support frame 1 is provided with the electric telescopic rod 21, and the output end of the electric telescopic rod 21 is fixed with the fixed seat 22, the inner side of the fixed seat 22 is penetrated by the telescopic sleeve 24, and the upper end of the telescopic sleeve 24 is connected to the micro motor 23, and the outer side of the telescopic sleeve 24 is surrounded by the reset spring 25, and the lower end surface of the telescopic sleeve 24 is fixed with a small threaded rod 241, and the shape of the small threaded rod 241 is adapted to the shape of the threaded groove 51.

[0047] A fixing seat 22 is fixed at one end of the electric telescopic rod 21. When in use, the position of the small threaded rod 241 from the support shaft 11 is adjusted by the electric telescopic rod 21, and the angular position of the small threaded rod 241 is adjusted by rotating the support shaft 11, so that it can correspond to the limiting holes 3 on the outer support ring 101, the middle support ring 102 and the inner support ring 103 respectively. When the small threaded rod 241 is inserted into different support rings, it can drive the corresponding support rings to rotate, so as to adjust the grinding of different polishing rings. A reset spring 25 is fixed between the lower end surface of the fixing seat 22 and the small threaded rod 241. When the small threaded rod 241 is screwed into the threaded groove 51, the reset spring 25 is in a stretched state. When the micro motor 23 is reversed to screw the small threaded rod 241 out of the threaded groove 51, it is pulled upward by the reset spring 25 to reset. At this time, the spring is in a restored state, and the lower end surface of the small threaded rod 241 is in contact with the upper end surface of the support frame 1.

[0048] Limiting protrusions 1021 are fixed in the center of both inner and outer sides of the middle support ring 102, and guide rails 1022 are fixed on the inner side of the outer support ring 101 and the outer side of the inner support ring 103, and the structures of the limiting protrusions 1021 and the guide rails 1022 are adapted to improve the stability of the connection among the outer support ring 101, the middle support ring 102 and the inner support ring 103, and when the outer support ring 101 rotates, the limiting protrusions 1021 slide along the guide rails 1022, so that the three support rings can rotate independently without interfering with each other, and at the same time, if the limiting protrusions 1021 are affected by friction to drive the adjacent support rings to rotate, at this time, since the synchronous ring 6 below it is controlled by the large threaded rod 5, even if the adjacent support rings rotate, the polishing liquid will not be sprayed outward.

[0049] A discharge seat 81 is provided through the upper end of the polishing component 9, and a tension spring 811 is fixed on the inner side of the discharge seat 81, and a sealing plug 812 is fixed on the upper end of the tension spring 811, and a sealing hole 813 is fixed on the upper end of the discharge seat 81, and a tension spring 811 is fixed to the bottom of the discharge seat 81, and the tension spring 811 drives the sealing plug 812 to move upward until the edge of the sealing plug 812 blocks the sealing hole 813 at the upper end of the discharge seat 81. At this time, the sealing cylinder 8 is in a sealed state, and the polishing liquid with abrasive particle size suitable for the polishing ring is stored in the sealing cylinder 8 in advance. When the piston 71 moves downward until the sealing plug 812 is squeezed, since the sealing plug 812 is conical, and the bottom diameter of the cone is larger than the top diameter, after the sealing plug 812 is squeezed, a gap is generated between its edge and the sealing hole 813, and the polishing liquid slides along the edge of the sealing plug 812, and when the large threaded rod 5 stops.

[0050] The sealed connection between the discharge seat 81 and the sealing cylinder 8 is used to prevent the polishing liquid from overflowing from the connection between the two, and is used to improve the cleanliness of the surrounding environment.

[0051] A protection component 10 is fixed to the lower end surface of the polishing component 9, and the protection component 10 includes a rubber belt 1001, a fixed ring 1002 and a guide ring 1003. Guide rings 1003 are fixed to the edges of both sides of the middle polishing ring 92, and the lower end of the guide ring 1003 is slidably connected to the fixed ring 1002, and the lower end of the fixed ring 1002 is fixed to a guide rubber belt 1001. When any one of the polishing rings rotates, the fixed ring 1002 will be driven to rotate in the guide ring 1003 through the rubber belt 1001 to avoid driving the other two sets of polishing rings to rotate. Since the grinding ring in operation will extend outward, taking the middle polishing ring 92 as an example, when the middle polishing ring 92 extends outward, the rubber belt 1001 will be stretched downward to deform it. At the same time, due to the elastic recovery tension of the rubber belt 1001, the edge of the middle polishing ring 92 will shrink inward. If the height difference between the polishing surface and the already polished surface is small and they are close to each other, the edge of the polishing surface can be contracted inward to protect the already polished surface and reduce the contact area between the edge of the middle polishing ring 92 and the edge of the polished surface.

[0052] A support shaft 11 is provided through the center of the support frame 1, and the inner side of the inner support ring 103 is connected to the support shaft 11 through a bearing seat, so that the inner support ring 103 does not rotate when the support shaft 11 rotates. The support shaft 11 and the support frame 1 need to be connected through an adjustment component 2.

[0053] The metal curved and special-shaped polishing machine includes a polishing structure, a support cover 12 and a servo motor 13. The upper end of the support shaft 11 is connected to the output end of the servo motor 13, and the support cover 12 is fixed to the outside of the servo motor 13. The support shaft 11 is driven to rotate by the servo motor 13, and the support shaft 11 is fixedly connected to the adjustment component 2, so that the adjustment component 2 is driven to rotate by the support shaft 11, which can change the position of the adjustment component 2 to align it with the corresponding limit hole 3, thereby driving different support rings to rotate and grinding the polishing material.

[0054] The polishing structure and the metal curved surface special-shaped polishing machine provided by the present invention are further described below in conjunction with the accompanying drawings and implementation examples.

[0055] When in use, fix the polishing machine just above the polishing material. Taking the paint surface of the polishing material and the middle polishing ring 92 as an example, start the servo motor 13, the servo motor 13 drives the support shaft 11 to rotate slowly, and at the same time, the electric telescopic rod 21 drives the fixed seat 22 to extend outward until the small threaded rod 241 is located in the limit hole 3 at the upper end of the middle support ring 102, start the micro motor 23, the micro motor 23 drives the small threaded rod 241 to tighten the threaded groove 51 inside the large threaded rod 5, and then drives the large threaded rod 5 to move downward along the threaded seat 4, thereby driving the synchronous ring 6 to slide downward along the guide rod 63 until the piston 71 at the bottom of the support rod 7 squeezes the sealing plug 812 and the tension spring 811, so that the sealing plug 812 is separated from the sealing hole 813, and at this time, the polishing liquid flows downward along the edge of the sealing plug 812 until it drips on the polishing surface, and at the same time, the large threaded rod 5 continues to rotate, so that multiple pistons 71 press the middle polishing ring 92 downward to move downward, and stretch the rubber belts 1001 on both sides downward, and at this time, the rubber The elastic force of the belt 1001 restoring upward causes the edge of the middle polishing ring 92 to be lifted upward and forms a relative depression with its middle part, and then the servo motor 13 rotates quickly to make the middle polishing ring 92 rotate quickly, thereby grinding the polishing surface. After grinding, the micro motor 23 and the small threaded rod 241 are reversed, thereby driving the large threaded rod 5 to move upward until the middle polishing ring 92 is parallel to the position of the other two polishing rings. At this time, the piston 71 disengages from the sealing plug 812, and the tension spring 811 restores and drives the sealing plug 812 to move upward until the edge of the sealing plug 812 blocks the sealing hole 813. Since the upper end of the large threaded rod 5 is restricted by the protrusion in the limiting hole 3 and cannot continue to rise, the small threaded rod 241 is continued to be rotated until the small threaded rod 241 is screwed out of the threaded groove 51 and is stretched by the reset spring 25 to disengage from the large threaded rod 5, thereby recovering, and then moved to the limiting hole 3 on different support rings through the adjustment component 2, thereby grinding for different paint surfaces.

[0056] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0057] The above shows and describes the basic principles, main features and advantages of the present disclosure. Those skilled in the art should understand that the present disclosure is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present disclosure. Without departing from the spirit and scope of the present disclosure, the present disclosure may have various changes and improvements, and these changes and improvements fall within the scope of the present disclosure to be protected.

Claims

1. A polishing structure, characterized in that: It comprises a support frame (1), an adjustment component (2) and a polishing component (9); The support frame (1) comprises an outer support ring (101), a middle support ring (102) and an inner support ring (103), wherein the inner side of the outer support ring (101) is slidably connected to the middle support ring (102), and the inner side of the middle support ring (102) is slidably connected to the inner support ring (103); At least one limiting hole (3) is provided through the inner sides of the outer support ring (101), the middle support ring (102) and the inner support ring (103), and a threaded seat (4) is fixed at the lower ends of the plurality of limiting holes (3), and a large threaded rod (5) is provided through the inner side of the threaded seat (4), and a threaded groove (51) is fixed on the upper end surface of the large threaded rod (5), and an adjustment component (2) is provided on the upper end surface of the support frame (1); A synchronization ring (6) is fixed directly below each of the plurality of large threaded rods (5), and at least one support rod (7) is fixed equidistantly to the lower end surface of the synchronization ring (6), a piston (71) is fixed to the lower end surface of the support rod (7), and a sealing cylinder (8) is sealed on the outer wall of the piston (71), and a polishing assembly (9) is fixed to the lower end of the sealing cylinder (8); The polishing assembly (9) comprises an outer polishing ring (91), a middle polishing ring (92) and an inner polishing ring (93); the inner polishing ring (93) is located directly below the inner support ring (103); the middle polishing ring (92) is arranged on the outer side of the inner polishing ring (93); and the outer polishing ring (91) is arranged on the outer side of the middle polishing ring (92).

2. The polishing structure according to claim 1, characterized in that: A plurality of support springs (62) are fixed between the synchronizer ring (6) and the support frame (1), a mounting seat (61) corresponding to the position of the limiting hole (3) is fixed to the upper end surface of the synchronizer ring (6), and a guide rod (63) penetrating the synchronizer ring (6) is provided between the synchronizer ring (6) and the support frame (1).

3. The polishing structure according to claim 1, characterized in that: The adjustment component (2) comprises an electric telescopic rod (21), a fixing seat (22), a micro motor (23), a telescopic sleeve (24) and a return spring (25), and the upper end surface of the support frame (1) is provided with the electric telescopic rod (21), and the fixing seat (22) is fixed to the output end of the electric telescopic rod (21), the inner side of the fixing seat (22) is penetrated by a telescopic sleeve (24), the upper end of the telescopic sleeve (24) is connected to the micro motor (23), and the outer side of the telescopic sleeve (24) is surrounded by a return spring (25).

4. The polishing structure according to claim 3, characterized in that: A small threaded rod (241) is fixed to the lower end surface of the telescopic sleeve (24), and the shape of the small threaded rod (241) is matched to the shape of the threaded groove (51).

5. The polishing structure according to claim 1, characterized in that: Limiting protrusions (1021) are fixed at the centers of both inner and outer sides of the middle support ring (102), and guide rails (1022) are fixed on the inner side of the outer support ring (101) and the outer side of the inner support ring (103), and the limiting protrusions (1021) are compatible with the structures of the guide rails (1022).

6. The polishing structure according to claim 1, characterized in that: A discharge seat (81) is provided through the upper end of the polishing assembly (9), a tension spring (811) is fixed on the inner side of the discharge seat (81), a sealing plug (812) is fixed on the upper end of the tension spring (811), and a sealing hole (813) is fixed on the upper end of the discharge seat (81).

7. The polishing structure according to claim 6, characterized in that: The material discharging seat (81) is connected to the sealing cylinder (8) in a sealing manner.

8. The polishing structure according to claim 5, characterized in that: A protection component (10) is fixed to the lower end surface of the polishing component (9), and the protection component (10) comprises a rubber belt (1001), a fixing ring (1002) and a guide ring (1003), guide rings (1003) are fixed to the edges of both sides of the middle polishing ring (92), and the lower end of the guide ring (1003) is slidably connected to the fixing ring (1002), and the lower end of the fixing ring (1002) is fixed to a guide rubber belt (1001).

9. The polishing structure according to claim 1, characterized in that: A support shaft (11) is provided through the center of the support frame (1).

10. Metal curved surface special-shaped polishing machine, characterized in that: The metal curved surface special-shaped polishing machine comprises a polishing structure as described in any one of claims 1 to 9, a support cover (12) and a servo motor (13), the upper end of the support shaft (11) is connected to the output end of the servo motor (13), and the support cover (12) is fixed to the outer side of the servo motor (13).

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