Polishing device for metal tool manufacturing

By using folding air duct and gas pipeline structure in the polishing device for metal tool manufacturing, the cold air is transported to the surface of the polishing machine and the metal tool, combined with the filtration and dehumidification structure, the problem that traditional polishing devices cannot effectively cool down is solved, and safe and effective are achieved The polishing process improves the life of the equipment and the health protection of workers.

CN222244203UActive Publication Date: 2024-12-27ANHUI JINSHENG LOGO CO LTD
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Patent Information

Application Number
CN202420325431.4
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-02-21
Publication Date
2024-12-27
Estimated Expiration
2034-02-21

AI Technical Summary

Technical Problem

Traditional polishing devices cannot effectively cool down when polishing special metal tools, resulting in heat accumulation, causing tool deformation, polishing wheel wear or fire, and coolant may cause chemical reactions or difficulty in contact with complex surfaces, affecting the quality and safety of polishing.

Method used

A polishing device for metal tool manufacturing is designed, using folded air ducts and gas pipeline structures to transport cold air to the surface of the polishing machine and metal tool. Combined with filtration and dehumidification structures, air is extracted and purified through the wind structure to achieve cooling without cooling liquid. Effect.

Benefits of technology

Effectively prevent tool deformation, polishing wheel wear and fire caused by excessive temperature, improve polishing quality and equipment life, reduce the risk of safety accidents, and protect workers' health by purifying the air.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a polishing device for metal tool manufacturing, and relates to the technical field of metal tool manufacturing. A water storage tank is fixedly connected to the upper end of the supporting frame, gas pipeline structures are symmetrically and fixedly connected to the upper end of the water storage tank, a first filtering structure is fixedly connected to one side of the upper end of the water storage tank, and the side, close to the gas pipeline structures, of the first filtering structure is fixedly connected with the gas pipeline structures. The side, away from the gas pipeline structure, of the first filtering structure is fixedly connected with a second filtering structure. According to the metal tool polishing device, the water storage tank is matched with the second filtering structure, so that air in the device can be cooled, moisture in the air is filtered through the dehumidification structure, and then the cooled cold air can be conveyed to the surface, making contact with a metal tool, of the polishing machine through the cooperation of the wind power structure and the gas pipeline structure; and therefore, the serious problems such as deformation of the tool caused by too high temperature and the like are prevented.
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Description

Technical Field

[0001] The utility model relates to the technical field of metal tool manufacturing, in particular to a polishing device for metal tool manufacturing. Background Art

[0002] In the manufacturing process of metal tools, polishing is a crucial link. It is not only related to the appearance quality of the final product, but also directly affects its performance and service life. However, in the traditional polishing process, due to the high-speed friction between the polishing wheel and the metal surface, a large amount of heat will be generated. This heat will not only cause the temperature of the polishing wheel and the metal surface to rise sharply, but may also cause serious problems such as deformation of the tool, wear of the polishing wheel and even fire; and high temperature will not only reduce the life of the polishing wheel, causing its surface to burn and peel, but also affect the polishing effect of the metal surface. Excessive temperature may cause the metal surface to burn, forming difficult-to-remove color spots or oxide layers, which will seriously affect the polishing quality and product performance.

[0003] During the use of traditional polishing machines, the temperature is mainly reduced by coolant. This method is effective for most metal tools because it can quickly take away the heat generated during the polishing process and prevent the tool from overheating. However, for some special metal tools, using coolant for cooling may bring some problems. First, some metal tools are sensitive to the chemical composition of the coolant and may react chemically with the coolant, causing the tool to be corroded or performance to deteriorate. In this case, the use of coolant not only fails to achieve the purpose of cooling, but may cause greater damage to the tool; secondly, some metal tools have complex shapes and many small gaps or holes on the surface. It is difficult to fully contact and cool these areas with coolant. If heat accumulates in these areas, the tool may be deformed or damaged. Therefore, for these special metal tools, it is necessary to design a cooling method that does not rely on coolant to improve the polishing effect and the service life of the equipment, and reduce the risk of equipment damage and safety accidents.

[0004] Chinese patent document CN108326717A discloses a polishing device for metal tool manufacturing, including a workbench, a side plate, a fixed baffle plate and a motor, a mesh is installed in the middle of the workbench, the side plates are respectively welded to the left and right sides of the workbench, the fixed baffle plates are respectively arranged at the left and right ends above the workbench, the motor is fixed to the lower surface of the top plate, a first mounting plate is fixed below the rotating shaft, and the lower part of the first mounting plate is connected to the connecting shaft through the second mounting plate, and a polishing plate is fixed below the connecting shaft; however, there are still the following defects in the implementation process:

[0005] Although the device in the above document can fix metal tools of different volumes and specifications, it cannot cool down the metal tools when polishing them. As a result, a large amount of heat will be generated due to the high-speed friction between the polishing wheel and the metal surface, thereby affecting the polishing quality of the metal tools by the device. Summary of the invention

[0006] The purpose of the utility model is to provide a polishing device for metal tool manufacturing to solve the problems raised in the above background technology.

[0007] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0008] A polishing device for metal tool manufacturing comprises a workbench; a support frame is fixedly connected to the upper end of the workbench, a flat-nose pliers is arranged at the lower part of the support frame, the flat-nose pliers is used to clamp the workpiece, a polishing machine is arranged at the upper part of the support frame, the polishing machine is used to polish the workpiece, a water tank is fixedly connected to the upper end of the support frame, a gas pipeline structure is symmetrically fixedly connected to the upper end of the water tank, a first filter structure is fixedly connected to one side of the upper end of the water tank, a side of the first filter structure close to the gas pipeline structure is fixedly connected to the gas pipeline structure, a side of the first filter structure away from the gas pipeline structure is fixedly connected to a second filter structure, a side of the second filter structure away from the first filter structure is fixedly connected to a dehumidification structure, a side of the dehumidification structure away from the second filter structure is fixedly connected to a wind structure, and a side of the wind structure close to the gas pipeline structure is fixedly connected to the gas pipeline structure.

[0009] A further improvement of the technical solution of the utility model is that the gas pipeline structure includes a connecting block, the lower end of the connecting block is fixedly connected to the upper end of the water tank, a folded air duct is fixedly connected to the side of the connecting block away from the first filtering structure, and the lower part of the folded air duct passes through the upper part of the support frame and extends to the middle part of the support frame.

[0010] The above technical solution is adopted, in which the foldable air duct is made of polypropylene material. According to the height of the polishing machine and the thickness of the metal tool, the foldable air duct can be placed close to the side of the metal tool and can be folded or stretched at any time, so that the foldable air duct on one side can absorb the smoke generated by the polishing machine on the metal tool, and the foldable air duct on the other side can transport cold air to the surface where the polishing machine contacts the metal tool, so as to cool down the surface of the polishing machine and the metal tool.

[0011] A further improvement of the technical solution of the utility model is that the first filtering structure includes a shell 1, a side of the shell 1 close to the connecting block is fixedly connected to the connecting block, a slide groove 1 is opened in the middle of the shell 1, and a dust collecting box is slidably connected to the inner cavity of the slide groove 1.

[0012] The above technical solution is adopted, in which the air containing impurities such as smoke absorbed by the folded air duct is filtered through the filter screen on the side wall of the inner cavity of the slide groove, and some metal particles in the smoke are intercepted, so as to purify the air and prevent these particles from being inhaled into the body of the workers, thereby affecting the workers' health.

[0013] A further improvement of the technical solution of the utility model is that an observation window is opened on one side of the water tank, a water pump is fixedly connected to the inner cavity of the water tank, a water pipe is fixedly connected to the output end of the water pump, and the output end of the water pipe passes through the inner cavity of the water tank and extends to the outer surface of the water tank.

[0014] The above technical solution is adopted. An observation window is provided in the solution so that the water level in the inner cavity of the water tank can be observed. Through the cooperation of a water pump and a water pipe, the water in the inner cavity of the water tank can be transported to the inner cavity of the water distribution tank. Then, the water is used to purify the air transported to the device and cool the air.

[0015] A further improvement of the technical solution of the utility model is that: the second filtering structure includes a water diversion bin, the water pipe output end penetrates the outer surface of the water diversion bin and extends to the inner cavity of the water diversion bin, and the inner cavity of the water pipe is communicated with the inner cavity of the water diversion bin, the lower end of the water diversion bin is fixedly connected to an outer shell 2, the lower part of the outer shell 2 is fixedly connected to a water collecting plate, the lower part of the outer shell 2 is provided with a slide groove 2, the inner cavity of the slide groove 2 is slidably connected to a water filter box, the bottom wall of the inner cavity of the outer shell 2 is provided with a water outlet groove, and the water outlet groove penetrates the upper end of the water storage tank and extends to the inner cavity of the water storage tank.

[0016] By adopting the above technical solution, the water after filtering the air can be collected into the inner cavity of the water filter box through the cooperation of the water collecting plate and the water filter box, and then purified again by the water filter box, thereby improving the utilization efficiency of water resources.

[0017] A further improvement of the technical solution of the utility model is that the dehumidification structure includes a water-blocking plate, a side of the water-blocking plate close to the outer shell two is fixedly connected to the outer shell two, a side of the water-blocking plate away from the outer shell two is fixedly connected to the outer shell three, and a drying plate is slidably connected to the middle of the outer shell three.

[0018] By adopting the above technical solution, the water in the inner cavity of the second shell can be isolated by the water-blocking plate to prevent the water in the inner cavity of the second shell from spilling onto the drying plate when filtering the air, thereby wetting the drying plate and affecting the drying plate's filtering of water vapor in the air.

[0019] A further improvement of the technical solution of the utility model is that the wind structure includes a shell four, a side of the shell four close to the shell three is fixedly connected to the shell three, a connecting rod is fixedly connected to the side wall of the inner cavity of the shell four, and a motor fan is fixedly connected to one side of the connecting rod.

[0020] The above-mentioned technical solution is adopted, in which the air in the device is extracted and transported by a motor fan, so that when the polishing machine is polishing the metal tool, it can be cooled and the air containing some metal particles can be extracted, and then transported to the device through the cooperation of the folded air duct and the connecting block, and then the device is used to filter and cool the air.

[0021] Due to the adoption of the above technical solution, the utility model has achieved the following technical progress compared with the prior art:

[0022] 1. The utility model provides a polishing device for metal tool manufacturing. Through the cooperation of a water storage tank and a second filter structure, the air in the device can be cooled down. Then, the moisture in the air is filtered by a dehumidification structure. After that, the wind structure and the gas pipeline structure are cooperated to transport the cooled cold air to the surface of the polisher in contact with the metal tool, so as to cool it down, thereby preventing serious problems such as deformation of the tool, wear of the polishing wheel and even fire caused by excessive temperature.

[0023] 2. The utility model provides a polishing device for metal tool manufacturing. When the device delivers cooled cold air to the surface of the polishing machine and the metal tool through a gas pipeline structure on one side, the gas pipeline structure on the other side can absorb harmful gases containing impurities such as metal particles generated by the polishing machine when polishing the metal tool, and then these harmful gases can be filtered and cooled down through a first filter structure and a second filter structure, thereby preventing workers from inhaling these harmful gases into their bodies, which would affect their health. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below in conjunction with the accompanying drawings.

[0025] Figure 1 It is a front view of the overall structure of the utility model;

[0026] Figure 2 This is a rear view of the overall structure of the utility model;

[0027] Figure 3 This is a schematic diagram of the gas pipeline structure of the utility model;

[0028] Figure 4 This is a schematic diagram of the first filtering structure of the utility model;

[0029] Figure 5 This is a schematic diagram of the second filtering structure of the utility model;

[0030] Figure 6 This is a schematic diagram of the dehumidification structure of the utility model;

[0031] Figure 7 This is a schematic diagram of the wind power structure of the utility model;

[0032] In the figure: 1. workbench; 2. support frame; 3. flat-nose pliers; 4. water storage tank; 41. observation window; 42. water pump; 43. water pipe; 5. gas pipeline structure; 51. connecting block; 52. folding air duct; 6. first filtering structure; 61. shell one; 62. slide slot one; 63. dust collecting box; 7. second filtering structure; 71. water distribution bin; 72. shell two; 73. water collecting plate; 74. water filter box; 8. dehumidification structure; 81. water baffle; 82. shell three; 83. drying plate; 9. wind structure; 91. shell four; 92. connecting rod; 93. motor fan; 10. polishing machine. DETAILED DESCRIPTION

[0033] The present invention is further described in detail below in conjunction with the embodiments:

[0034] Example 1

[0035] like Figure 1-7 As shown, the utility model provides a polishing device for metal tool manufacturing, including a workbench 1; a support frame 2 is fixedly connected to the upper end of the workbench 1, a flat-nose pliers 3 are arranged at the lower part of the support frame 2, the flat-nose pliers 3 are used to clamp the workpiece, a polishing machine 10 is arranged at the upper part of the support frame 2, and the polishing machine 10 is used to polish the workpiece, a water tank 4 is fixedly connected to the upper end of the support frame 2, a gas pipeline structure 5 is symmetrically fixedly connected to the upper end of the water tank 4, a first filter structure 6 is fixedly connected to one side of the upper end of the water tank 4, a side of the first filter structure 6 close to the gas pipeline structure 5 is fixedly connected to the gas pipeline structure 5, a side of the first filter structure 6 away from the gas pipeline structure 5 is fixedly connected to the second filter structure 7, a side of the second filter structure 7 away from the first filter structure 6 is fixedly connected to the dehumidification structure 8, a side of the dehumidification structure 8 away from the second filter structure 7 is fixedly connected to the wind structure 9, and a side of the wind structure 9 close to the gas pipeline structure 5 is fixedly connected to the gas pipeline structure 5.

[0036] In this embodiment, the metal tool is clamped and fixed by flat-nose pliers 3, the required water is stored and transported by the water tank 4, and then the water tank 4 and the second filter structure 7 cooperate to filter and cool the air transported to the device by the gas pipeline structure 5 on one side. By cooperating with the gas pipeline structure 5 and the first filter structure 6, the air transported to the device by the gas pipeline structure 5 can be filtered to intercept some solid impurities such as metal particles. The dehumidification structure 8 can filter the water vapor in the filtered wet air. By cooperating with the wind structure 9 and the gas pipeline structure 5, the cooled cold air can be transported to the polishing machine 10 and the surface of the metal tool to cool them.

[0037] Example 2

[0038] like Figure 4 and Figure 7 As shown, on the basis of Example 1, the utility model provides a technical solution: preferably, the first filtering structure 6 includes an outer shell 61, and the side of the outer shell 61 close to the connecting block 51 is fixedly connected to the connecting block 51, a slide groove 62 is opened in the middle of the outer shell 61, and the inner cavity of the slide groove 62 is slidably connected to the dust collecting box 63, and the wind structure 9 includes an outer shell 4 91, and the side of the outer shell 4 91 close to the outer shell 3 82 is fixedly connected to the outer shell 3 82, the inner cavity side wall of the outer shell 4 91 is fixedly connected to a connecting rod 92, and one side of the connecting rod 92 is fixedly connected to a motor fan 93.

[0039] In this embodiment, the motor fan 93 is operated to extract and transport the air in the inner cavity of the outer shell four 91, and then drive the folded air duct 52 close to the side of the first filter structure 6 to absorb the smoke generated by the polishing machine 10 when polishing the surface of the metal tool, and then transport it to the inner cavity of the outer shell one 61 through the connecting block 51, and then pass through the filter on the side wall of the inner cavity of the outer shell three 82 to intercept some solid impurities such as metal particles in the smoke, and then the smoke will be transported to the inner cavity of the outer shell two 72.

[0040] Example 3

[0041] like Figure 5 As shown, on the basis of Example 2, the utility model provides a technical solution: preferably, an observation window 41 is provided on one side of the water tank 4, a water pump 42 is fixedly connected to the inner cavity of the water tank 4, a water pipe 43 is fixedly connected to the output end of the water pump 42, the output end of the water pipe 43 passes through the inner cavity of the water tank 4 and extends to the outer surface of the water tank 4, the second filtering structure 7 includes a water diversion tank 71, the output end of the water pipe 43 passes through the outer surface of the water diversion tank 71 and extends to the inner cavity of the water diversion tank 71, and the inner cavity of the water pipe 43 is communicated with the inner cavity of the water diversion tank 71, the lower end of the water diversion tank 71 is fixedly connected to an outer shell 2 72, the lower part of the outer shell 2 72 is fixedly connected to a water collecting plate 73, the lower part of the outer shell 2 72 is provided with a slide groove 2, the inner cavity of the slide groove 2 is slidably connected to a water filter box 74, the bottom wall of the inner cavity of the outer shell 2 72 is provided with a water outlet groove, and the water outlet groove passes through the upper end of the water tank 4 and extends to the inner cavity of the water tank 4.

[0042] In this embodiment, the water pump 42 is operated, and then the water pump 42 uses the water pipe 43 to transport the water in the inner cavity of the water storage tank 4 to the inner cavity of the water distribution chamber 71, and then the water is sprayed in the inner cavity of the shell 2 72 through the nozzle at the lower part of the water distribution chamber 71, and some fine particles or harmful gases in the smoke are intercepted and filtered by the water, and then the water containing fine particles will fall on the surface of the water collection plate 73. Then it is collected in the inner cavity of the water filter box 74, filtered by the water filter box 74, and the filtered water will flow into the inner cavity of the water storage tank 4 again, waiting for the next use.

[0043] Example 4

[0044] like Figure 3 and Figure 6 As shown, on the basis of Example 3, the utility model provides a technical solution: preferably, the gas pipeline structure 5 includes a connecting block 51, the lower end of the connecting block 51 is fixedly connected to the upper end of the water tank 4, the side of the connecting block 51 away from the first filtering structure 6 is fixedly connected with a folded air duct 52, the lower part of the folded air duct 52 passes through the upper part of the support frame 2 and extends to the middle part of the support frame 2, the dehumidification structure 8 includes a water-blocking plate 81, the side of the water-blocking plate 81 close to the outer shell 2 72 is fixedly connected to the outer shell 2 72, the side of the water-blocking plate 81 away from the outer shell 2 72 is fixedly connected to the outer shell 3 82, and the middle part of the outer shell 3 82 is slidably connected with a drying plate 83.

[0045] In this embodiment, the air filtered and cooled by the second filtering structure 7 will be transported to the inner cavity of the outer shell three 82, and then pass through the drying plate 83 to intercept and filter the moisture in the humid air. After that, the cooled dry air is transported by the motor fan 93 to the inner cavity of the connecting block 51 close to the side of the wind structure 9, and then the cold air is transported to the polishing machine 10 and the surface of the metal tool through the folded air duct 52, thereby cooling them.

[0046] The working principle of the polishing device for metal tool manufacturing will be described in detail below.

[0047] like Figure 1-7 As shown, when a metal tool needs to be polished, first fix the metal tool to be polished at the flat-nose pliers 3, then stretch the folded air ducts 52 on both sides close to one side of the metal tool, adjust the position of the folded air ducts 52 on both sides close to the side of the metal tool, and then contact the polishing wheel of the polishing machine 10 with the surface of the metal tool, then operate the polishing machine 10, and then use the polishing machine 10 to polish the surface of the metal tool, and at the same time operate the motor fan 93, and use the motor fan 93 to extract and transport the air in the inner cavity of the outer shell four 91, and then drive the folded air duct 52 on one side of the first filter structure 6 to absorb the smoke generated by the polishing of the metal tool surface by the polishing machine 10, and then transport it to the inner cavity of the outer shell one 61 through the connecting block 51, and then some solid impurities such as metal particles in the smoke can be intercepted by the filter screen on the side wall of the inner cavity of the outer shell three 82, and then these smoke will be transported to the inner cavity of the outer shell two 72;

[0048] By running the water pump 42, the water pump 42 uses the water pipe 43 to transport the water in the inner cavity of the water storage tank 4 to the inner cavity of the water distribution chamber 71, and then sprays the water in the inner cavity of the second shell 72 through the nozzle at the bottom of the water distribution chamber 71, and intercepts and filters some fine particles or harmful gases in the smoke through the water, and then the water containing fine particles will fall on the surface of the water collection plate 73. Then it will be collected in the inner cavity of the water filter box 74, filtered by the water filter box 74, and the filtered water will flow into the inner cavity of the water storage tank 4 again, waiting for the next use;

[0049] The air filtered and cooled by the second filtering structure 7 will be transported to the inner cavity of the outer shell three 82, and then pass through the drying plate 83 to intercept and filter the moisture in the humid air. After that, the cooled dry air is transported by the motor fan 93 to the inner cavity of the connecting block 51 close to the side of the wind structure 9, and then the cold air is transported to the polishing machine 10 and the surface of the metal tool through the folded air duct 52 to cool them.

[0050] The above generally describes the present invention in detail, but it is obvious to a person skilled in the art that some modifications or improvements can be made to the present invention. Therefore, modifications or improvements that do not deviate from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A polishing device for metal tool manufacturing, comprising a workbench (1); characterized in that: The upper end of the workbench (1) is fixedly connected to a support frame (2), the lower part of the support frame (2) is provided with a flat-nose pliers (3), the flat-nose pliers (3) are used to clamp the workpiece, the upper part of the support frame (2) is provided with a polishing machine (10), the polishing machine (10) is used to polish the workpiece, the upper end of the support frame (2) is fixedly connected to a water tank (4), the upper end of the water tank (4) is symmetrically fixedly connected to a gas pipeline structure (5), and one side of the upper end of the water tank (4) is fixedly connected to a first filtering structure (6), the first filtering structure (6) is fixedly connected to the gas pipeline structure (5) on a side close to the gas pipeline structure (5); the first filter structure (6) is fixedly connected to the second filter structure (7) on a side away from the gas pipeline structure (5); the second filter structure (7) is fixedly connected to the dehumidification structure (8) on a side away from the first filter structure (6); the dehumidification structure (8) is fixedly connected to the wind power structure (9) on a side away from the second filter structure (7); and the wind power structure (9) is fixedly connected to the gas pipeline structure (5) on a side close to the gas pipeline structure (5).

2. A polishing device for metal tool manufacturing according to claim 1, characterized in that: The gas pipeline structure (5) comprises a connecting block (51), the lower end of which is fixedly connected to the upper end of the water storage tank (4), and a folded air duct (52) is fixedly connected to a side of the connecting block (51) away from the first filtering structure (6), the lower part of which passes through the upper part of the support frame (2) and extends to the middle part of the support frame (2).

3. A polishing device for metal tool manufacturing according to claim 2, characterized in that: The first filtering structure (6) comprises an outer shell (61), wherein the outer shell (61) is fixedly connected to the connecting block (51) at one side thereof close to the connecting block (51), a sliding groove (62) is provided in the middle of the outer shell (61), and a dust collecting box (63) is slidably connected to the inner cavity of the sliding groove (62).

4. A polishing device for metal tool manufacturing according to claim 1, characterized in that: An observation window (41) is provided on one side of the water storage tank (4); a water pump (42) is fixedly connected to the inner cavity of the water storage tank (4); a water pipe (43) is fixedly connected to the output end of the water pump (42); and the output end of the water pipe (43) passes through the inner cavity of the water storage tank (4) and extends to the outer surface of the water storage tank (4).

5. A polishing device for metal tool manufacturing according to claim 4, characterized in that: The second filtering structure (7) comprises a water separation chamber (71), the output end of the water pipe (43) penetrates the outer surface of the water separation chamber (71) and extends to the inner cavity of the water separation chamber (71), and the inner cavity of the water pipe (43) is communicated with the inner cavity of the water separation chamber (71), the lower end of the water separation chamber (71) is fixedly connected to the second outer shell (72), the lower part of the second outer shell (72) is fixedly connected to a water collecting plate (73), the lower part of the second outer shell (72) is provided with a second slide groove, the inner cavity of the second slide groove is slidably connected to a water filter box (74), and the bottom wall of the inner cavity of the second outer shell (72) is provided with a water outlet groove, and the water outlet groove penetrates the upper end of the water storage tank (4) and extends to the inner cavity of the water storage tank (4).

6. A polishing device for metal tool manufacturing according to claim 5, characterized in that: The dehumidification structure (8) includes a water-blocking plate (81), wherein the side of the water-blocking plate (81) close to the outer shell (72) is fixedly connected to the outer shell (72), and the side of the water-blocking plate (81) away from the outer shell (72) is fixedly connected to the outer shell (3) (82), and the middle part of the outer shell (82) is slidably connected to a drying plate (83).

7. A polishing device for metal tool manufacturing according to claim 6, characterized in that: The wind power structure (9) comprises a shell four (91), wherein the side of the shell four (91) close to the shell three (82) is fixedly connected to the shell three (82), the inner cavity side wall of the shell four (91) is fixedly connected to a connecting rod (92), and one side of the connecting rod (92) is fixedly connected to a motor fan (93).