Fluid polishing device for surface of inner cavity of product

Abstract

The utility model relates to the technical field of polishing devices, in particular to a fluid polishing device for the surface of an inner cavity of a product. Comprising a fluid polishing device and a fixing jig, and the fluid polishing device comprises a first fluid material barrel, a first air cylinder installed on the first fluid material barrel, a second fluid material barrel and a second air cylinder installed on the second fluid material barrel; the fixing jig comprises an upper fixing plate and a lower fixing plate, the upper fixing plate and the lower fixing plate are each provided with a plurality of first containing holes penetrating through the upper surface and the lower surface of the upper fixing plate and the lower fixing plate, and the first containing holes are used for bearing products. After the fixing jig is installed between the first fluid material barrel and the second fluid material barrel, the first fluid material barrel and the second fluid material barrel can be connected with the first containing hole in a communicating mode, and inner hole grinding is conducted on a product in the first containing hole through flowing fluid grinding materials. Compared with the prior art, the grinding device does not need to be manually held by hand to grind the inner holes of the products one by one, batch production can be achieved, and therefore the machining cost is reduced, the production period is shortened, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of polishing devices, in particular to a fluid polishing device for the inner cavity surface of products. Background Art

[0002] Polishing refers to a processing method that uses mechanical, chemical or electrochemical actions to reduce the surface roughness of a workpiece to obtain a bright and flat surface. It is a finishing process that uses a polishing tool and abrasive particles or other polishing media to process the surface of the workpiece. Polishing cannot improve the dimensional accuracy or geometric shape accuracy of the workpiece, but aims to obtain a smooth surface or mirror gloss, and sometimes it is also used to eliminate gloss (matting).

[0003] In the prior art, for the polishing of the outer surface of some products, the workpiece is polished by a rotating polishing wheel. However, if it is necessary to polish the inner hole of some products with a small inner diameter, the polishing wheel cannot be used for polishing; it is necessary to use a high-precision polishing device and design a high-precision grinding blade, and manually operate the high-precision polishing device to polish the inner hole of these products with a small inner diameter.

[0004] However, the inventor found in the actual R & D process that; using manual operation of the polishing device for the inner hole polishing of products, the manual processing cost is very high, the production cycle is long, and the roughness is uneven, resulting in a high number of repair times; furthermore, for some products that require mirror polishing, the operation method of using a manual grinding device cannot meet the requirements.

[0005] Therefore, it is necessary to study a new technical solution to solve the above problems. Summary of the Utility Model

[0006] In view of this, in view of the deficiencies of the prior art, the main purpose of the present utility model is to provide a fluid polishing device for the inner cavity surface of products, which effectively solves the technical defects of low production efficiency and inability to meet the grinding accuracy requirements in the inner hole grinding of the prior art.

[0007] To achieve the above object, the present utility model adopts the following technical solution: A fluid polishing device for the inner cavity surface of products, comprising

[0008] The fluid polishing device includes a workbench, a first fluid cylinder and a second fluid cylinder installed on the workbench; the first fluid cylinder is equipped with a first air cylinder, and the second fluid cylinder is equipped with a second air cylinder; when the telescopic rods of the first air cylinder and the second air cylinder cooperate to expand and contract, they can push the fluid abrasive to flow between the first fluid cylinder and the second fluid cylinder;

[0009] The fixing fixture includes an upper fixing plate and a lower fixing plate assembled together. The upper fixing plate and the lower fixing plate are both provided with a plurality of first receiving holes penetrating through their upper and lower surfaces, and the first receiving holes are used to carry products.

[0010] After the fixing fixture is installed between the first fluid cartridge and the second fluid cartridge, the first fluid cartridge and the second fluid cartridge can be conductively connected to the first receiving holes, so that the flowing fluid abrasive can grind the products in the first receiving holes for inner hole grinding.

[0011] The beneficial effects of the fluid polishing device for the inner cavity surface of the product provided by this application are as follows: By setting the fixing fixture, multiple products can be clamped at one time; when grinding the inner holes of the products, by pushing the fluid abrasive to flow repeatedly between the first fluid cartridge and the second fluid cartridge, the fluid abrasive can pass through the inner holes of the products when flowing, so as to realize grinding of the inner holes of the products; compared with the prior art, on the one hand, it is not necessary to manually hold the grinding device to grind the inner holes of the products one by one, batch production can be realized, thereby reducing the processing cost, shortening the production cycle and improving the production efficiency; on the other hand, using the flowing fluid abrasive for grinding can achieve the effect of uniform grinding, and the grinding accuracy can be further improved; and the number of repairs is reduced, and the yield of inner hole grinding of the products can be improved.

[0012] As a preferred solution: The lower surface of the upper fixing plate is provided with first positioning posts, and the upper surface of the lower fixing plate is provided with first positioning holes; after the upper fixing plate is installed on the upper surface of the lower fixing plate, the first positioning posts are inserted into the first positioning holes.

[0013] As a preferred solution: The upper surface of the upper fixing plate is installed with a first limiting plate, and the first limiting plate is provided with first through holes equal in number to the first receiving holes; one first through hole is coaxially arranged with the first first receiving hole, and the diameter of the first through hole is smaller than the diameter of the first receiving hole; the lower surface of the lower fixing plate is installed with a second limiting plate, and the second limiting plate is provided with second through holes equal in number to the number of the first receiving holes; one second through hole is coaxially arranged with one first receiving hole, and the diameter of the second through hole is smaller than the diameter of the first receiving hole.

[0014] As a preferred solution: A plurality of first receiving holes are arranged in a circular array to form a row, and are sequentially spaced apart along the central direction of the upper fixing plate and the lower fixing plate to form multiple rows; when the bottom of the first fluid cartridge abuts against the upper fixing plate and the top of the second fluid cartridge abuts against the lower fixing plate, the multiple first receiving holes are within the coverage range of the first fluid cartridge and the second fluid cartridge.

[0015] As a preferred solution: It further includes an upper clamp and a lower clamp. The lower clamp is fixedly installed on the workbench, the upper clamp is movably installed on the workbench and is located above the lower clamp, and the upper clamp and the lower clamp enclose a clamping space for clamping the fixing fixture.

[0016] As a preferred solution: The first fluid cylinder is fixedly installed on the upper fixture, and the bottom of the first fluid cylinder extends downward to be flush with the lower surface of the upper fixture; the second fluid cylinder is fixedly installed on the lower fixture, and the top of the second fluid cylinder extends upward to be flush with the upper surface of the lower fixture; after the upper fixture abuts against the upper surface of the upper fixed plate and the lower fixture abuts against the lower surface of the lower fixed plate, the first fluid cylinder and the second fluid cylinder are respectively connected in communication with a plurality of first receiving holes.

[0017] As a preferred solution: It further includes a first driving cylinder installed on the workbench, and the telescopic rod of the first driving cylinder is fixedly connected to the upper fixture; when the telescopic rod of the first driving cylinder moves up and down, it can synchronously drive the upper fixture to move closer or farther away relative to the lower fixture.

[0018] As a preferred solution: The first cylinder is fixedly installed on the top of the first fluid cylinder, a first piston is installed on the telescopic rod of the first cylinder, and the first piston is movably installed in the first fluid cylinder; the second cylinder is fixedly installed on the bottom of the second fluid cylinder, a second piston is installed on the telescopic rod of the second cylinder, and the second piston is movably installed in the second fluid cylinder.

[0019] As a preferred solution: When the telescopic rod of the first cylinder extends to drive the first piston to move downward, the telescopic rod of the second cylinder retracts to drive the second piston to move downward; when the telescopic rod of the second cylinder extends to drive the second piston to move upward, the telescopic rod of the first cylinder retracts to drive the first piston to move upward.

[0020] As a preferred solution: It further includes a machine frame, the machine frame is provided with a control box for controlling the operation of the fluid polishing device, and the machine frame is provided with a display panel for displaying the operation information of the fluid polishing device; the workbench is fixedly installed on the machine frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0022] Figure 1 is a schematic three-dimensional structure diagram of a fluid polishing device for the inner cavity surface of a product provided by an embodiment of the present application;

[0023] Figure 2 is Figure 1 the top view of the fluid polishing device for the inner cavity surface of the product shown;

[0024] Figure 3Yes Figure 2 A - A sectional view of the fluid polishing device for the inner cavity surface of the product as shown;

[0025] Figure 4 Yes Figure 3 Partial enlarged view of the fluid polishing device for the inner cavity surface of the product with a fixed fixture installed as shown;

[0026] Figure 5 Yes Figure 4 Schematic perspective view of the three - dimensional structure of the fixed fixture in the fluid polishing device for the inner cavity surface of the product as shown;

[0027] Figure 6 Yes Figure 5 Exploded view of the fixed fixture as shown.

[0028] Among them, each reference numeral in the figure:

[0029] 10. Fluid polishing device; 101. Workbench; 102. Frame; 103. Control box; 104. Display panel; 11. First fluid cylinder; 111. First cylinder; 112. First piston; 12. Second fluid cylinder; 121. Second cylinder; 122. Second piston; 13. Upper fixture; 14. Lower fixture; 15. Clamping space; 16. First driving cylinder;

[0030] 20. Fixed fixture; 21. Upper fixing plate; 211. First positioning post; 212. First limiting plate; 213. First through - hole; 22. Lower fixing plate; 221. First positioning hole; 222. Second limiting plate; 223. Second through - hole; 23. First accommodating hole. Detailed implementation manners

[0031] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application clearer, the following further elaborates on this application in combination with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not used to limit this application.

[0032] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0033] It should be understood that the orientation or positional relationship indicated by terms such as "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0034] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, the meaning of "a plurality" is two or more unless otherwise specifically defined.

[0035] In order to make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the following further details the present utility model in conjunction with the drawings and embodiments.

[0036] Please refer to Figures 1 to 6 together. Now, a fluid polishing device 10 for the inner cavity surface of a product provided by an embodiment of the present application will be described. The fluid polishing device 10 for the inner cavity surface of a product includes: a fluid polishing device 10 and a fixing fixture 20.

[0037] The fluid polishing device 10 includes a workbench 101, a first fluid cylinder 11 and a second fluid cylinder 12 installed on the workbench 101; a first air cylinder 111 is installed on the first fluid cylinder 11, and a second air cylinder 121 is installed on the second fluid cylinder 12; when the telescopic rods of the first air cylinder 111 and the second air cylinder 121 cooperate to expand and contract, they can push the fluid abrasive to flow between the first fluid cylinder 11 and the second fluid cylinder 12; the fixing fixture 20 includes an upper fixing plate 21 and a lower fixing plate 22 assembled together, and a plurality of first receiving holes 23 penetrating through their upper and lower surfaces are provided on both the upper fixing plate 21 and the lower fixing plate 22, and the first receiving holes 23 are used for carrying products; after the fixing fixture 20 is installed between the first fluid cylinder 11 and the second fluid cylinder 12, the first fluid cylinder 11 and the second fluid cylinder 12 can be conductively connected to the first receiving holes 23, so that the flowing fluid abrasive grinds the inner holes of the products in the first receiving holes 23.

[0038] Specifically, when performing fluid grinding operations, first load the product into the first receiving hole 23, and then load the fixing jig 20 into the fluid polishing device 10, making the first fluid cylinder 11 and the second fluid cylinder 12 abut against the fixing jig 20, so that the first fluid cylinder 11 and the second fluid cylinder 12 are respectively connected to the first receiving hole 23; at this time, by the telescopic rods of the first cylinder 111 and the second cylinder 121 cooperating to expand and contract, the fluid grinding material can be made to flow back and forth between the first fluid cylinder 11 and the second fluid cylinder 12. During the flowing process, it will enter the fixing jig 20 and repeatedly pass through the inner hole of the product in the fixing jig 20, and the inner hole of the product is ground by using the fluid grinding material.

[0039] It can be seen that, compared with the prior art, on the one hand, there is no need to manually hold the grinding device to grind the inner holes of the products one by one, batch production can be realized, thereby reducing the processing cost, shortening the production cycle, and improving the production efficiency; on the other hand, grinding with flowing fluid grinding material can achieve the effect of uniform grinding, and the grinding accuracy is further improved; and the number of repairs is reduced, and the yield of the inner hole grinding of the product can be improved.

[0040] In some embodiments of the present application, the lower surface of the upper fixing plate 21 is provided with a first positioning post 211, and the upper surface of the lower fixing plate 22 is provided with a first positioning hole 221; after the upper fixing plate 21 is installed on the upper surface of the lower fixing plate 22, the first positioning post 211 is inserted into the first positioning hole 221. When loading the product, first separate the upper fixing plate 21 and the lower fixing plate 22, and then insert one end of the product into the first receiving hole 23 of the lower fixing plate 22; furthermore, load the upper fixing plate 21 onto the lower surface of the lower fixing plate 22, and insert the other end of the product into the first receiving hole 23 of the upper fixing plate 21, then the product can be carried by the upper fixing plate 21 and the lower fixing plate 22; at this time, load the entire fixing jig 20 into the fluid polishing device 10, and the fluid grinding and polishing operation can be performed.

[0041] Specifically, several first receiving holes 23 are arranged in a circular array to form a row, and are sequentially spaced outward along the central direction of the upper fixing plate 21 and the lower fixing plate 22 to form multiple rows; when the bottom of the first fluid cylinder 11 abuts against the upper fixing plate 21 and the top of the second fluid cylinder 12 abuts against the lower fixing plate 22, multiple first receiving holes 23 are within the coverage of the first fluid cylinder 11 and the second fluid cylinder 12. With such a structure, multiple products can be carried by one fixing jig 20 at the same time for grinding processing, batch grinding operations can be realized, which is beneficial to improving the production efficiency.

[0042] More specifically, a first limiting plate 212 is mounted on the upper surface of the upper fixing plate 21. The first limiting plate 212 is provided with first through holes 213 equal in number to the first accommodation holes 23. One first through hole 213 is coaxially arranged with the first one of the first accommodation holes 23, and the diameter of the first through hole 213 is smaller than that of the first accommodation hole 23. A second limiting plate 222 is mounted on the lower surface of the lower fixing plate 22. The second limiting plate 222 is provided with second through holes 223 equal in number to the number of the first accommodation holes 23. One second through hole 223 is coaxially arranged with one of the first accommodation holes 23, and the diameter of the second through hole 223 is smaller than that of the first accommodation hole 23. This ensures that the product will not fall out after being inserted into the first accommodation hole 23.

[0043] The upper fixture 13 and the lower fixture 14 are provided. The lower fixture 14 is fixedly mounted on the workbench 101. The upper fixture 13 is movably mounted on the workbench 101 and is located above the lower fixture 14. The upper fixture 13 and the lower fixture 14 enclose a clamping space 15 for clamping and fixing the fixing jig 20. The first fluid cylinder 11 is fixedly mounted on the upper fixture 13, and the bottom of the first fluid cylinder 11 extends downward to be flush with the lower surface of the upper fixture 13. The second fluid cylinder 12 is fixedly mounted on the lower fixture 14, and the top of the second fluid cylinder 12 extends upward to be flush with the upper surface of the lower fixture 14. After the upper fixture 13 abuts against the upper surface of the upper fixing plate 21 and the lower fixture 14 abuts against the lower surface of the lower fixing plate 22, the first fluid cylinder 11 and the second fluid cylinder 12 are respectively connected in communication with a plurality of first accommodation holes 23.

[0044] The upper surface of the upper fixing plate 21 has a concave position for the first limiting plate 212 to be inserted, so that the upper surface of the first limiting plate 212 is flush with the upper surface of the upper fixing plate 21. The lower surface of the lower fixing plate 22 is also provided with a concave position for the second limiting plate 222 to be inserted, so that the lower surface of the second limiting plate 222 is flush with the lower surface of the lower fixing plate 22. With such a structure, after the fixing jig 20 is inserted into the clamping space 15, the upper fixture 13 abuts against the upper surface of the upper fixing plate 21 and the lower fixture 14 abuts against the lower surface of the lower fixing plate 22. In this way, during the grinding process of the abrasive in the first fluid cylinder 11 and the second fluid cylinder 12, it is not easy to seep out from the gaps between the upper fixture 13 and the upper fixing plate 21 and between the lower fixture 14 and the lower fixing plate 22, thereby improving the reliability of the fluid grinding operation.

[0045] Preferably, a first driving cylinder 16 mounted on the workbench 101 is further included. The telescopic rod of the first driving cylinder 16 is fixedly connected to the upper fixture 13. When the telescopic rod of the first driving cylinder 16 moves up and down, it can synchronously drive the upper fixture 13 to move downwards close to or upwards away from the lower fixture 14.

[0046] Exemplarily, the first driving cylinders 16 have two spaced apart sides, the telescopic rods of the two first driving cylinders 16 are equipped with a movable plate, and the upper clamp 13 is fixedly installed at the bottom of the movable plate; by using the two first driving cylinders 16 to extend and retract up and down at the same time, the movable plate can be driven to move up and down, so that the upper clamp 13 and the lower clamp 14 clamp the fixed fixture 20.

[0047] In other embodiments of the present application, the first cylinder 111 is fixedly installed on the top of the first fluid barrel 11, and the telescopic rod of the first cylinder 111 is equipped with a first piston 112, and the first piston 112 is movably installed in the first fluid barrel 11; the second cylinder 121 is fixedly installed on the bottom of the second fluid barrel 12, and the telescopic rod of the second cylinder 121 is equipped with a second piston 122, and the second piston 122 is movably installed in the second fluid barrel 12. Specifically, when the telescopic rod of the first cylinder 111 is extended to drive the first piston 112 to move downward, the telescopic rod of the second cylinder 121 is retracted to drive the second piston 122 to move downward; when the telescopic rod of the second cylinder 121 is extended to drive the second piston 122 to move upward, the telescopic rod of the first cylinder 111 is retracted to drive the first piston 112 to move upward.

[0048] It can be understood that the volume of the fluid abrasive is smaller than the capacity of the first fluid barrel 11 and the second fluid barrel 12; thus, when the first cylinder 111 and the second cylinder 121 cooperate to extend and retract, the fluid abrasive can be switched into the first fluid barrel 11 or the second fluid barrel 12. In the process of the fluid abrasive switching into the first fluid barrel 11 or the second fluid barrel 12, it will pass through the inner hole of the product in the fixed fixture 20, thereby realizing the fluid grinding operation.

[0049] In other embodiments of the present application, a frame 102 is further included, the frame 102 is provided with a control box 103 for controlling the operation of the fluid polishing device 10, and the frame 102 is provided with a display panel 104 for displaying the operation information of the fluid polishing device 10, and the workbench 101 is fixedly installed on the frame 102. The operation of the fluid polishing device 10 is controlled by the control box 103, which is a common design method of automation equipment and will not be described in detail here.

[0050] The above are only preferred embodiments of the present invention, and only specifically describe the technical principles of the present invention. These descriptions are only for the purpose of explaining the principles of the present invention, and cannot be interpreted as limiting the scope of protection of the present invention in any way. Based on the explanation here, any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention, and other specific implementation methods of the present invention that can be associated with by technicians in this field without creative labor, should be included in the scope of protection of the present invention.

Claims

1. A fluid polishing device for the inner surface of a product, characterized in that: include A fluid polishing device (10) comprises a workbench (101), a first fluid cartridge (11) and a second fluid cartridge (12) mounted on the workbench (101); the first fluid cartridge (11) is mounted with a first cylinder (111), and the second fluid cartridge (12) is mounted with a second cylinder (121); when the telescopic rod of the first cylinder (111) and the telescopic rod of the second cylinder (121) cooperate to extend and retract, the fluid abrasive can be pushed to flow between the first fluid cartridge (11) and the second fluid cartridge (12); A fixing fixture (20) comprises an upper fixing plate (21) and a lower fixing plate (22) assembled together, wherein the upper fixing plate (21) and the lower fixing plate (22) are both provided with a plurality of first receiving holes (23) penetrating the upper and lower surfaces thereof, and the first receiving holes (23) are used to carry products; When the fixing fixture (20) is installed between the first fluid barrel (11) and the second fluid barrel (12), the first fluid barrel (11) and the second fluid barrel (12) can be connected to the first receiving hole (23), so that the flowing fluid grinding material can grind the inner hole of the product in the first receiving hole (23).

2. The fluid polishing device for the inner surface of a product according to claim 1, characterized in that: The lower surface of the upper fixing plate (21) is provided with a first positioning column (211), and the upper surface of the lower fixing plate (22) is provided with a first positioning hole (221); After the upper fixing plate (21) is installed on the upper surface of the lower fixing plate (22), the first positioning column (211) is inserted into the first positioning hole (221).

3. The fluid polishing device for the inner surface of a product according to claim 1 or 2, characterized in that: A first limiting plate (212) is installed on the upper surface of the upper fixing plate (21), and the first limiting plate (212) is provided with first through holes (213) whose number is equal to the number of the first receiving holes (23); one first through hole (213) is coaxially arranged with the first first receiving hole (23), and the diameter of the first through hole (213) is smaller than the diameter of the first receiving hole (23); A second limiting plate (222) is installed on the lower surface of the lower fixing plate (22), and the second limiting plate (222) is provided with second through holes (223) whose number is equal to that of the first accommodating holes (23); one second through hole (223) is coaxially arranged with one first accommodating hole (23), and the diameter of the second through hole (223) is smaller than the diameter of the first accommodating hole (23).

4. The fluid polishing device for the inner surface of a product according to claim 3, characterized in that: The plurality of first accommodating holes (23) are arranged along a circular array to form a row, and are arranged outwardly along the center direction of the upper fixing plate (21) and the lower fixing plate (22) in sequence at intervals to form multiple rows; When the bottom of the first fluid cartridge (11) abuts against the upper fixing plate (21) and the top of the second fluid cartridge (12) abuts against the lower fixing plate (22), the plurality of first receiving holes (23) are located within the coverage range of the first fluid cartridge (11) and the second fluid cartridge (12).

5. The fluid polishing device for the inner surface of a product according to claim 1 or 4, characterized in that: It also includes an upper clamp (13) and a lower clamp (14), wherein the lower clamp (14) is fixedly mounted on the workbench (101), and the upper clamp (13) is movably mounted on the workbench (101) and is located above the lower clamp (14), and the upper clamp (13) and the lower clamp (14) enclose a clamping space (15) for clamping a fixed fixture (20).

6. The fluid polishing device for the inner surface of a product according to claim 5, characterized in that: The first fluid cartridge (11) is fixedly mounted on the upper fixture (13), and the bottom of the first fluid cartridge (11) extends downward and is flush with the lower surface of the upper fixture (13); The second fluid cartridge (12) is fixedly mounted on the lower fixture (14), and the top of the second fluid cartridge (12) extends upward and is flush with the upper surface of the lower fixture (14); When the upper clamp (13) abuts against the upper surface of the upper fixing plate (21), and the lower clamp (14) abuts against the lower surface of the lower fixing plate (22), the first fluid cartridge (11) and the second fluid cartridge (12) are respectively connected to the plurality of first accommodating holes (23).

7. The fluid polishing device for the inner surface of a product according to claim 6, characterized in that: It also includes a first driving cylinder (16) installed on the workbench (101), and the telescopic rod of the first driving cylinder (16) is fixedly connected to the upper clamp (13); when the telescopic rod of the first driving cylinder (16) is extended and retracted up and down, it can synchronously drive the upper clamp (13) to move downward or upward relative to the lower clamp (14).

8. The fluid polishing device for the inner surface of a product according to claim 1, 6 or 7, characterized in that: The first cylinder (111) is fixedly mounted on the top of the first fluid barrel (11); a first piston (112) is mounted on the telescopic rod of the first cylinder (111); and the first piston (112) is movably mounted in the first fluid barrel (11); The second cylinder (121) is fixedly mounted on the bottom of the second fluid barrel (12); the telescopic rod of the second cylinder (121) is equipped with a second piston (122); and the second piston (122) is movably mounted in the second fluid barrel (12).

9. The fluid polishing device for the inner surface of a product according to claim 8, characterized in that: When the telescopic rod of the first cylinder (111) extends to drive the first piston (112) to move downward, the telescopic rod of the second cylinder (121) retracts to drive the second piston (122) to move downward; When the telescopic rod of the second cylinder (121) extends to drive the second piston (122) to move upward, the telescopic rod of the first cylinder (111) retracts to drive the first piston (112) to move upward.

10. The fluid polishing device for the inner surface of a product according to claim 1, characterized in that: It also includes a frame (102), wherein the frame (102) is provided with a control box (103) for controlling the operation of the fluid polishing device (10), and the frame (102) is provided with a display panel (104) for displaying the operation information of the fluid polishing device (10); The workbench (101) is fixedly mounted on the frame (102).

Images