Outer surface polishing device for metal coating

Abstract

The invention belongs to the technical field of machining equipment, and relates to a metal coating outer surface polishing device which comprises a mounting frame, a polishing wheel, a movable clamping mechanism, a partition plate, a transmission pipe, a cooling pipe, a plurality of first annular plates and a cooling liquid conveying assembly. Cooling liquid is conveyed into the cooling cavity through the cooling pipe by the cooling liquid conveying assembly and then guided out through the transmission pipe, and a corrugated cooling liquid flowing channel is formed through the multiple first annular plates to change the flow state of the cooling liquid, so that the heat exchange path of the cooling liquid is prolonged, turbulence disturbance is strengthened, and the heat exchange efficiency is improved. The cooling liquid can fully absorb heat generated when the polishing wheel rotates at a high speed and rubs with the surface of a metal coating on a workpiece, the cooling effect is improved, the heat is prevented from being accumulated in the local area of the metal coating, the risk that the metal coating falls off is reduced, meanwhile, the polishing wheel drives the cooling cavity to rotate, radial flow is forced through centrifugal force, and the cooling effect is improved. And the cooling liquid flows back and forth in the radial direction, and the cooling effect is further improved.

Description

Technical Field

[0001] This invention belongs to the field of processing equipment technology and relates to a device for polishing the outer surface of metal coatings. Background Technology

[0002] Metallic coatings refer to functional coverings that, through specific processes, uniformly and firmly adhere metallic or alloy materials in thin or layered form to the surface of non-metallic or metallic substrates, thereby endowing the substrate material with new functions or enhancing its original properties. To improve aesthetics and optimize functional performance, the outer surface of metallic coatings is often polished. This polishing process uses physical, chemical, or mechanical methods to refine the surface, removing minor defects such as scratches, burrs, oxide spots, and orange peel texture, thus reducing surface roughness. Mechanical polishing often employs polishing equipment.

[0003] Currently, existing polishing devices include a frame, a polishing wheel, a drive mechanism, and a moving clamping mechanism. The moving clamping mechanism clamps the workpiece and makes the polishing wheel contact the outer surface of the workpiece's metal coating. The drive mechanism drives the polishing wheel to rotate and polish the outer surface of the workpiece's metal coating. The moving clamping mechanism moves the workpiece to adjust the polishing position.

[0004] However, during the polishing process, when the polishing wheel rotates at high speed and rubs against the surface of the metal coating, it will continuously generate a large amount of frictional heat. This heat is prone to accumulate in local areas of the metal coating. Due to the lack of effective heat dissipation methods, this local temperature rise will damage the interfacial bonding between the metal coating and the substrate, resulting in a decrease in the adhesion of the metal coating, increasing the risk of peeling off, and shortening the service life of the workpiece. Summary of the Invention

[0005] The purpose of this invention is to provide a polishing device for the outer surface of a metal coating, which can absorb the heat generated when the polishing wheel rotates at high speed and rubs against the surface of the metal coating, thereby preventing heat from accumulating in local areas of the metal coating, thus avoiding the impact of high temperature on the interface bonding between the metal coating and the substrate, and reducing the risk of peeling.

[0006] To achieve the above objectives, the technical solution provided by the present invention is as follows: A polishing device for the outer surface of a metal coating includes a mounting frame, a polishing wheel disposed within the mounting frame, a movable clamping mechanism disposed below the polishing wheel, and the polishing wheel having a hollow internal structure. It also includes: A partition is horizontally set inside the polishing wheel, dividing the polishing wheel into a reflux chamber and a cooling chamber from top to bottom. Multiple through holes are opened on the partition near its edge. The transmission tube is vertically installed on the upper part of the polishing wheel. The lower end of the transmission tube is connected to the upper part of the polishing wheel and communicates with the return cavity. The upper end of the transmission tube passes through the mounting bracket and is located on the upper part of the mounting bracket. The transmission tube is connected to a rotating mechanism. The cooling pipe is vertically installed inside the transmission pipe, and the lower end of the cooling pipe is connected to the partition and communicates with the cooling chamber. Multiple first annular plates are disposed in the cooling cavity and are coaxially arranged with the cooling pipe. The multiple first annular plates are sequentially nested along the radial direction of the polishing wheel. The upper part of the first annular plate located in the center is connected to the top of the cooling cavity, the lower part of the adjacent first annular plate is connected to the bottom of the cooling cavity, and the remaining first annular plates are alternately connected to the top and bottom of the cooling cavity. Each first annular plate has a trumpet-shaped structure. The coolant delivery assembly is rotatably connected to the upper end of the transmission pipe and the upper end of the cooling pipe, respectively, and is used to deliver coolant into the cooling chamber through the cooling pipe and then out through the transmission pipe.

[0007] The invention is further characterized by: The coolant delivery assembly includes: A rotating disk is located at the upper end of the transmission tube and is rotatably connected to the transmission tube. The rotating disk is hollow inside and communicates with the transmission tube. A cooling pipe passes through the rotating disk and is rotatably connected to the rotating disk. The cooling tank is located on the upper part of the mounting bracket and contains coolant. The water pump has its inlet end connected to the outlet of the cooling tank, and its outlet end is rotatably connected to the cooling pipe through the first connecting pipe. The collection box is connected to the rotating disk via a second connecting pipe.

[0008] The acute angle formed by each of the first annular plates and the horizontal direction is 8° to 12°.

[0009] The spacing between two adjacent first annular plates is 5% to 8% of the diameter of the polishing wheel.

[0010] Each of the first annular plates connected to the bottom of the cooling chamber has a second annular plate arranged along its circumference on its inner side. The second annular plate has a funnel-shaped structure.

[0011] The acute angle formed between the second annular plate and the horizontal direction is 15°~25°.

[0012] The rotating mechanism includes: The rotating shaft is vertically installed inside the mounting bracket and positioned close to the transmission tube. The upper end of the rotating shaft is rotatably connected to the mounting bracket. The first gear is fitted onto the rotating shaft; The second gear is sleeved on the transmission tube and meshes with the first gear. The first motor is mounted on the upper part of the mounting bracket, and its output end passes through the upper part of the mounting bracket and is connected to the upper end of the rotating shaft.

[0013] A temperature sensor is installed at the bottom of the cooling chamber, a solenoid valve is installed at the output port of the water pump, and a controller is installed on the mounting bracket. The controller is electrically connected to the temperature sensor and the solenoid valve respectively. The temperature sensor is used to detect the temperature at the contact point between the polishing wheel and the workpiece in real time and feed it back to the controller. The controller is used to compare the detected temperature with the preset temperature and control the flow rate of the coolant through the solenoid valve so that the detected temperature enters the preset temperature range.

[0014] A method for polishing the outer surface of a metal coating includes the following steps: The workpiece to be polished is held by a moving clamping mechanism, and the workpiece is brought into contact with the polishing wheel. The polishing wheel is driven to rotate by a rotating mechanism to polish the workpiece. At the same time, the water pump is started to deliver coolant into the cooling chamber through the cooling pipe. The coolant flows from the center of the polishing wheel to the edge along the gap between two adjacent first annular plates, absorbing and carrying away the heat generated by the high-speed rotation of the polishing wheel and the friction with the workpiece. Then it enters the return chamber through multiple through holes and flows out through the transmission pipe. The temperature sensor detects the temperature at the contact point between the polishing wheel and the workpiece in real time and feeds the detected temperature back to the controller. The controller compares the detected temperature with the preset temperature and controls the flow rate of the coolant by controlling the opening of the solenoid valve, so that the detected temperature enters the preset temperature range.

[0015] The preset temperature is 40℃~60℃.

[0016] The mounting bracket is equipped with an audible and visual alarm, which is electrically connected to the controller. When the detected temperature is greater than or equal to 65°C and the duration is greater than 30 seconds, the controller activates the audible and visual alarm to sound an alarm.

[0017] The present invention provides an apparatus for polishing the outer surface of a metal coating, which has the following advantages: This invention delivers coolant into the cooling chamber through a cooling pipe via a coolant delivery assembly, and then exits it through a transmission pipe. Multiple first annular plates form a corrugated coolant flow path to alter the coolant flow pattern, extending the heat exchange path and enhancing turbulence. This allows the coolant to fully absorb the heat generated by the high-speed rotation of the polishing wheel and its friction with the metal coating surface on the workpiece, improving the cooling effect and preventing heat accumulation in localized areas of the metal coating. This avoids high temperatures affecting the interfacial bonding between the metal coating and the substrate, reducing the risk of metal coating peeling. Simultaneously, the polishing wheel drives the cooling chamber to rotate, forcing radial flow through centrifugal force, causing the coolant to reciprocate radially, further enhancing the cooling effect. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the main structure of the present invention.

[0019] Figure 2 This is a schematic diagram of the internal structure of the polishing wheel in this invention.

[0020] Figure 3 For the present invention Figure 2 Enlarged view of a local structure in section A.

[0021] Figure 4 This is a top view of the internal structure of the cooling cavity in this invention.

[0022] Figure 5 This is a top view of the bottom structure of the mounting bracket in this invention.

[0023] Figure label: 1. Mounting bracket, 2. Polishing wheel, 3. Mounting plate, 4. Partition plate, 5. Return chamber, 6. Cooling chamber, 7. Through hole, 8. Transmission pipe, 9. Cooling pipe, 10. Cooling box, 11. Collection box, 12. First connecting pipe, 13. Second connecting pipe, 14. Water pump, 15. Rotary disk, 16. Limiting cylinder, 17. First gear, 18. Second gear, 19. Fixing block, 20. First annular plate, 21. Second annular plate, 22. Clamping block, 23. First hydraulic cylinder, 24. Second hydraulic cylinder, 25. First motor, 26. Second motor, 27. Third motor, 28. First lead screw, 29. Second lead screw, 30. Slide rail, 31. Slide groove, 32. Slider, 33. Rotating shaft, 34. Controller, 35. Support plate. Detailed Implementation

[0024] The technical solutions of the present invention will now be described clearly and in detail with reference to the accompanying drawings. In the description of the embodiments of the present invention, unless otherwise stated, " / " indicates "or," for example, A / B can mean A or B. "And / or" in the text is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, and B alone. Furthermore, in the description of the embodiments of the present invention, "multiple" refers to two or more. The terms "first" and "second" are used for descriptive purposes only and should not be construed as implying or suggesting relative importance or implicitly indicating the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature.

[0025] like Figure 1 , Figure 2As shown, the present invention provides a polishing device for the outer surface of a metal coating, including a mounting frame 1, a polishing wheel 2 disposed inside the mounting frame 1, the polishing wheel 2 being horizontally arranged, a movable clamping mechanism disposed below the polishing wheel 2, the polishing wheel 2 having a hollow internal structure, and also including a partition plate 4, a transmission pipe 8, a cooling pipe 9, multiple first annular plates 20, and a coolant delivery assembly. The partition plate 4 is horizontally disposed inside the polishing wheel 2, dividing the polishing wheel 2 into a return chamber 5 and a cooling chamber 6 from top to bottom. Multiple through holes 7 are opened on the partition plate 4 near its edge, and the multiple through holes 7 are evenly arranged along the circumference of the polishing wheel 2, allowing the return chamber 5 and the cooling chamber 6 to communicate. The transmission pipe 8 is vertically disposed above the polishing wheel 2, the lower end of the transmission pipe 8 being connected to the upper part of the polishing wheel 2 and communicating with the return chamber 5, and the upper end of the transmission pipe 8 passing through the mounting frame 1 and located above the mounting frame 1. A rotating mechanism is connected to the transmission pipe 8, which drives the polishing wheel 2 to rotate via the transmission pipe 8. The cooling pipe 9 is vertically installed inside the transmission pipe 8, with its lower end connected to the partition plate 4. The cooling pipe 9 communicates with the cooling chamber 6. Multiple first annular plates 20 are installed inside the cooling chamber 6, coaxially arranged with the cooling pipe 9. The multiple first annular plates 20 are sequentially nested along the radial direction of the polishing wheel 2. The upper part of the first annular plate 20 located at the center is connected to the top of the cooling chamber 6, and the lower part of the adjacent first annular plate 20 is connected to the bottom of the cooling chamber 6. The remaining first annular plates 20 are alternately connected to the top and bottom of the cooling chamber 6. Each first annular plate 20 has a trumpet-shaped structure. The coolant delivery assembly is rotatably connected to the upper end of the transmission pipe 8 and the upper end of the cooling pipe 9, respectively. The coolant delivery assembly is used to deliver coolant into the cooling chamber 6 through the cooling pipe 9 and then out through the transmission pipe 8. This invention delivers coolant into the cooling chamber 6 via a coolant delivery assembly through a cooling pipe 9, and then out through a transmission pipe 8. Multiple first annular plates 20 form a corrugated coolant flow path to alter the coolant flow pattern, extending the heat exchange path and enhancing turbulence. This allows the coolant to fully absorb the heat generated when the polishing wheel 2 rotates at high speed and rubs against the metal coating surface on the workpiece, improving the cooling effect and preventing heat accumulation in localized areas of the metal coating. This avoids high temperatures affecting the interface bonding between the metal coating and the substrate, reducing the risk of metal coating peeling. Simultaneously, the polishing wheel 2 drives the cooling chamber 6 to rotate, forcing radial flow through centrifugal force, causing the coolant to reciprocate radially, further enhancing the cooling effect.

[0026] like Figure 1 , Figure 2As shown, the coolant delivery assembly includes a rotating disk 15, a cooling tank 10, a water pump 14, and a collection tank 11. The rotating disk 15 is located at the upper end of the transmission pipe 8 and is rotatably connected to the transmission pipe 8. The rotating disk 15 is hollow inside and communicates with the transmission pipe 8. The cooling pipe 9 passes through the rotating disk 15 and is rotatably and sealingly connected to the rotating disk 15. The cooling tank 10 is located on the upper part of the mounting bracket 1 and stores coolant inside the cooling tank 10. The input end of the water pump 14 is connected to the outlet of the cooling tank 10, and the output end of the water pump 14 is rotatably connected to the cooling pipe 9 through a first connecting pipe 12. The inlet of the collection tank 11 is connected to the rotating disk 15 through a second connecting pipe 13.

[0027] like Figure 3 As shown, the acute angle formed by each first annular plate 20 and the horizontal direction is 8°~12°. If the acute angle formed by each first annular plate 20 and the horizontal direction is less than 8°, the angle is too small, and the guiding effect on the coolant is insufficient. When the centrifugal force drives the coolant to flow radially outward, the first annular plate 20 connected to the bottom of the cooling chamber 6 cannot effectively block and guide the fluid back to the center, which easily forms a "one-way outward flow", resulting in overheating at the center and undercooling at the edges. The radial temperature difference may expand to more than ±5°. If the angle is greater than 12°, the angle is too large and will form a strong resistance barrier to the fluid. The centrifugal force needs to overcome greater resistance to drive the fluid flow, resulting in a 30%~40% reduction in fluid velocity, or even a decrease in velocity between two adjacent first annular plates. The eddy currents formed between the annular plates 20 actually weaken the turbulence intensity and reduce the heat transfer coefficient by 20% to 30%. Setting the angle to 8° to 12° is optimal. The guiding force and resistance of each first annular plate 20 to the fluid are balanced. Centrifugal force can easily push the coolant along the plate surface to form a reciprocating cycle of "radial outward flow → first annular plate 20 blocking → backflow to the center → next first annular plate 20 guiding it outward again". The fluid velocity is stable at 1.2m / s to 1.8m / s, which is suitable for the conventional rotation speed of the polishing wheel 2 of 1500r / min to 3000r / min. The radial temperature difference of the entire cooling chamber 6 can be controlled within ±2℃, which fully meets the temperature requirements of high-precision machining of the grinding wheel.

[0028] like Figure 3 , Figure 4As shown, the spacing between two adjacent first annular plates 20 is 5% to 8% of the diameter of the polishing wheel 2. The spacing between two adjacent first annular plates 20 is set so that the coolant can fill the flow channel and form effective heat exchange in a limited space, without causing excessive resistance or blockage due to too small a spacing. It also needs to be precisely matched with the heat dissipation area of ​​the polishing wheel 2. Specifically, when the coolant flows out of one first annular plate 20 and enters the adjacent coolant flow channel, the 5% to 8% spacing allows the fluid to quickly fill the coolant flow channel under the action of centrifugal force and collide with the inclined surface of the next first annular plate 20 to form a secondary vortex. Compared with a wide spacing, the number of vortices can be increased by 2 to 3 times. These small-scale vortices will break the radial temperature stratification of the coolant, so that the fluid temperature difference in the coolant flow channel is controlled within ±1℃, thereby ensuring uniform temperature throughout the polishing wheel 2 and avoiding grinding accuracy deviations caused by local overheating.

[0029] like Figure 3 , Figure 4 As shown, each of the first annular plates 20 connected to the bottom of the cooling chamber 6 has a second annular plate 21 arranged along its circumference on its inner side. The second annular plate 21 has a funnel-shaped structure. The purpose of setting the second annular plate 21 is to further optimize the flow path, coverage and heat exchange efficiency of the coolant through the synergistic effect of structural guidance and centrifugal force, while adapting to the heat dissipation requirements of the polishing wheel 2. First, the funnel-shaped second annular plate 21 can force the coolant to flow along the wall, avoiding the formation of liquid-free areas in the cooling chamber 6. Second, the funnel-shaped second annular plate 21 will provide slight damping and flow guidance for the coolant, extending the residence time and heat exchange path of the coolant in the cooling chamber 6.

[0030] like Figure 3 As shown, the acute angle formed by the second annular plate 21 and the horizontal direction is 15°~25°.

[0031] When the coolant in the cooling chamber 6 rotates with the polishing wheel 2, it is subjected to a centrifugal force in the radial direction. If the angle of the second annular plate 21 is less than 15°, the angle between the inner wall of the cooling chamber 6 and the direction of the centrifugal force is too large. The coolant is easily driven by the centrifugal force to detach from the inner side of the second annular plate 21 and cannot be effectively guided to the inner area, resulting in flow failure. If the angle is greater than 25°, the inner side of the second annular plate 21 is too steep. The coolant will quickly accumulate at the bottom of the second annular plate 21 under the combined action of centrifugal force and gravity, and cannot be evenly distributed, or even form a local "liquid flow blockage", affecting the overall flow channel smoothness of the cooling chamber. Setting the angle to 15°~25° is exactly matched with the direction of the centrifugal force of the polishing wheel 2, so that the liquid flow can closely adhere to the inner wall of the funnel, without detaching from the wall or accumulating, achieving efficient flow guidance. It can extend the residence time of the coolant through appropriate resistance to ensure heat exchange, and will not cause insufficient flow due to excessive resistance, ensuring that the flow rate and heat exchange efficiency of the coolant per unit time are in the optimal range.

[0032] like Figure 1 As shown, the rotating mechanism includes a rotating shaft 33, a first gear 17, a second gear 18, and a first motor 25. The rotating shaft 33 is vertically mounted inside the mounting frame 1, and its position is close to the transmission tube 8. The upper end of the rotating shaft 33 is rotatably connected to the mounting frame 1. The first gear 17 is sleeved on the rotating shaft 33, and the second gear 18 is sleeved on the transmission tube 8. The second gear 18 is meshed with the first gear 17. The first motor 25 is mounted on the upper part of the mounting frame 1, and its output end passes through the upper part of the mounting frame 1 and is connected to the upper end of the rotating shaft 33.

[0033] like Figure 1 As shown, a temperature sensor is installed at the bottom of the cooling chamber 6, a solenoid valve is installed at the output port of the water pump 14, and a controller 34 is installed on the mounting bracket 1. The controller 34 is electrically connected to the temperature sensor and the solenoid valve respectively. The temperature sensor is used to detect the temperature at the contact position between the polishing wheel 2 and the workpiece in real time and feed it back to the controller 34. The controller 34 is used to compare the detected temperature with the preset temperature and control the flow rate of the coolant through the solenoid valve so that the detected temperature enters the preset temperature range.

[0034] like Figure 5As shown, the movable clamping mechanism includes a slide rail 30, which is horizontally arranged at the bottom of the mounting frame 1. Both ends of the slide rail 30 are slidably connected to the mounting frame 1. A first lead screw 28 is horizontally arranged vertically inside the mounting frame 1, with both ends rotatably connected to the mounting frame 1. The first lead screw 28 passes through the slide rail 30 and is threadedly connected to it. A second motor 26 is located on the side of the mounting frame 1 near one end of the first lead screw 28. The output end of the second motor 26 passes through the mounting frame 1 and connects to the end of the first lead screw 28. A groove 31 is formed along the length of the upper part of the slide rail 30. A slider 32 is slidably arranged in the groove 31. A second lead screw 29 is horizontally arranged in the groove 31, with both ends rotatably connected to the inner wall of the groove 31. The second lead screw 29 passes through the slider 32 and is threadedly connected to it. A third motor 27 is located at one end of the slide rail 30, with the output end of the third motor 27 passing through the end of the slide rail 30 and connecting to the end of the second lead screw 29. The slide block 32 is connected to the support plate 35, which is horizontally positioned above it. At least one set of fixing blocks 19 are mounted on the upper part of the support plate 35. Each set of fixing blocks 19 has two blocks, which are positioned opposite each other and close to the ends of the support plate 35. Clamping blocks 22 are positioned opposite each other between the two fixing blocks 19. Each clamping block 22 is connected to the adjacent fixing block 19 via a horizontally positioned first hydraulic cylinder 23. The support plate 35 and the slide block 32 are connected via a vertically positioned second hydraulic cylinder 24. A second motor 26 drives a first lead screw 28 to rotate forward and backward. The first lead screw 28 drives the support plate 35 to move longitudinally back and forth via a slide rail 30. A third motor 27 drives a second lead screw 29 to rotate forward and backward. The second lead screw 29 drives the support plate 35 to move laterally back and forth via the slide block 32. The second hydraulic cylinder 24 moves the support plate 35 up and down to adjust its height. The two first hydraulic cylinders 23 drive the two clamping blocks 22 to move towards or away from each other to clamp the workpiece.

[0035] The preset temperature is 40℃~60℃.

[0036] The mounting bracket 1 is equipped with an audible and visual alarm, which is electrically connected to the controller 34. When the detected temperature is greater than or equal to 65°C and the duration is greater than 30 seconds, the controller 34 controls the audible and visual alarm to start and trigger an alarm, so as to prevent the polishing wheel 2 from overheating and being damaged.

[0037] The present invention also provides a method for polishing the outer surface of a metal coating, using the above-described apparatus, comprising the following steps: The workpiece to be polished is held by a moving clamping mechanism and brought into contact with the polishing wheel 2. The polishing wheel 2 is rotated by a rotating mechanism to polish the workpiece. At the same time, the water pump 14 is started to deliver coolant into the cooling chamber 6 through the cooling pipe 9. The coolant flows from the center of the polishing wheel 2 to the edge along the gap between two adjacent first annular plates 20, absorbing and carrying away the heat generated by the high-speed rotation of the polishing wheel 2 and friction with the workpiece. It then enters the return chamber 5 through multiple through holes 7 and flows out through the transmission pipe 8. The temperature sensor detects the temperature at the contact point between the polishing wheel 2 and the workpiece in real time and feeds the detected temperature back to the controller 34. The controller 34 compares the detected temperature with the preset temperature and controls the flow rate of the coolant by controlling the opening of the solenoid valve, so that the detected temperature enters the preset temperature range.

[0038] Specifically, when the detected temperature is less than 40℃, the controller 34 controls the opening degree of the solenoid valve to be 15%~25%; when the detected temperature is in the range of 40℃~45℃, the controller 34 controls the opening degree of the solenoid valve to be 25%~30%; when the detected temperature is in the range of 55℃~60℃, the controller 34 controls the opening degree of the solenoid valve to be 50%~60%; when the detected temperature is in the range of 60℃~65℃, the controller 34 controls the opening degree of the solenoid valve to be 60%~70%; when the detected temperature is greater than or equal to 65℃, the controller 34 controls the opening degree of the solenoid valve to be 100%; and when the detected temperature is less than 30℃, the controller 34 controls the opening degree of the solenoid valve to be 10%~20%.

[0039] Working Principle: The workpiece to be polished is held by a moving clamping mechanism, bringing it into contact with the polishing wheel 2. A rotating mechanism drives the polishing wheel 2 to rotate and polish the workpiece. Simultaneously, the water pump 14 is activated, delivering coolant through the cooling pipe 9 into the cooling chamber 6. The coolant flows from the center of the polishing wheel 2 towards the edge along the gap between two adjacent first annular plates 20, absorbing and carrying away the heat generated by the high-speed rotation of the polishing wheel 2 and friction with the workpiece. The coolant then flows through multiple through holes 7 into the return chamber 5 and out through the transmission pipe 8. A temperature sensor continuously monitors the temperature at the contact point between the polishing wheel 2 and the workpiece and feeds the detected temperature back to the controller 34. The controller 34 compares the detected temperature with a preset temperature and controls the opening of the solenoid valve to regulate the flow rate of the coolant. When the detected temperature enters the preset temperature range, if the detected temperature is less than 40℃, the controller 34 controls the opening of the solenoid valve to be 15%~25%; if the detected temperature is in the range of 40℃~45℃, the controller 34 controls the opening of the solenoid valve to be 25%~30%; if the detected temperature is in the range of 55℃~60℃, the controller 34 controls the opening of the solenoid valve to be 50%~60%; if the detected temperature is in the range of 60℃~65℃, the controller 34 controls the opening of the solenoid valve to be 60%~70%; if the detected temperature is greater than or equal to 65℃, the controller 34 controls the opening of the solenoid valve to be 100%; if the detected temperature is greater than or equal to 65℃ and lasts for more than 30 seconds, the controller 34 activates the audible and visual alarm to prevent the polishing wheel 2 from overheating and being damaged.

[0040] It is understood that this invention has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this invention. Furthermore, under the teachings of this invention, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this invention. Therefore, this invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this invention are within the protection scope of this invention.

Claims

1. A polishing apparatus for the outer surface of a metal coating, comprising a mounting frame (1), wherein a polishing wheel (2) is disposed within the mounting frame (1), and a movable clamping mechanism is disposed below the polishing wheel (2), characterized in that, The polishing wheel (2) has a hollow internal structure and also includes: The partition (4) is horizontally set inside the polishing wheel (2), dividing the polishing wheel (2) into a return chamber (5) and a cooling chamber (6) from top to bottom. Multiple through holes (7) are provided on the partition (4) near its edge. The transmission tube (8) is vertically set on the upper part of the polishing wheel (2). The lower end of the transmission tube (8) is connected to the upper part of the polishing wheel (2) and communicates with the return cavity (5). The upper end of the transmission tube (8) passes through the mounting frame (1) and is located on the upper part of the mounting frame (1). The transmission tube (8) is connected to a rotating mechanism. Cooling pipe (9) is vertically installed inside transmission pipe (8). The lower end of cooling pipe (9) is connected to partition plate (4) and communicates with cooling chamber (6). Multiple first annular plates (20) are disposed in the cooling chamber (6) and are coaxially disposed with the cooling pipe (9). Multiple first annular plates (20) are sequentially sleeved along the radial direction of the polishing wheel (2). The upper part of the first annular plate (20) located in the center is connected to the top of the cooling chamber (6), the lower part of the adjacent first annular plate (20) is connected to the bottom of the cooling chamber (6), and the remaining first annular plates (20) are alternately connected to the top and bottom of the cooling chamber (6). Each first annular plate (20) has a trumpet-shaped structure. The coolant delivery assembly is rotatably connected to the upper end of the transmission pipe (8) and the upper end of the cooling pipe (9), respectively, and is used to send the coolant into the cooling chamber (6) through the cooling pipe (9) and then out through the transmission pipe (8).

2. The polishing apparatus for the outer surface of a metal coating according to claim 1, characterized in that, The coolant delivery assembly includes: A rotating disk (15) is set at the upper end of the transmission tube (8) and is rotatably connected to the transmission tube (8). The rotating disk (15) is hollow inside and communicates with the transmission tube (8). The cooling pipe (9) passes through the rotating disk (15) and is rotatably connected to the rotating disk (15). A cooling box (10) is installed on the upper part of the mounting bracket (1), and coolant is stored inside the cooling box (10); The water pump (14) has its input end connected to the outlet of the cooling tank (10), and its output end is rotatably connected to the cooling pipe (9) through the first connecting pipe (12). The inlet of the collection box (11) is connected to the rotating disk (15) through the second connecting pipe (13).

3. The polishing apparatus for the outer surface of a metal coating according to claim 1, characterized in that, Each of the first annular plates (20) forms an acute angle of 8° to 12° with the horizontal direction.

4. The polishing apparatus for the outer surface of a metal coating according to claim 1, characterized in that, The spacing between two adjacent first annular plates (20) is 5% to 8% of the diameter of the polishing wheel (2).

5. The polishing apparatus for the outer surface of a metal coating according to claim 1, characterized in that, Each of the first annular plates (20) connected to the bottom of the cooling chamber (6) has a second annular plate (21) arranged along its circumference on its inner side. The second annular plate (21) has a funnel-shaped structure.

6. The polishing apparatus for the outer surface of a metal coating according to claim 5, characterized in that, The acute angle formed between the second annular plate (21) and the horizontal direction is 15°~25°.

7. The polishing apparatus for the outer surface of a metal coating according to claim 5, characterized in that, The rotating mechanism includes: The rotating shaft (33) is vertically installed inside the mounting bracket (1) and is located close to the transmission tube (8). The upper end of the rotating shaft (33) is rotatably connected to the mounting bracket (1). The first gear (17) is fitted onto the rotating shaft (33); The second gear (18) is sleeved on the transmission tube (8), and the second gear (18) meshes with the first gear (17); The first motor (25) is located on the upper part of the mounting bracket (1). The output end of the first motor (25) passes through the upper part of the mounting bracket (1) and is connected to the upper end of the rotating shaft (33).

8. The polishing apparatus for the outer surface of a metal coating according to claim 2, characterized in that, A temperature sensor is provided at the bottom of the cooling chamber (6), a solenoid valve is provided at the output port of the water pump (14), and a controller (34) is provided on the mounting bracket (1). The controller (34) is electrically connected to the temperature sensor and the solenoid valve respectively. The temperature sensor is used to detect the temperature at the contact position between the polishing wheel (2) and the workpiece in real time and feed it back to the controller (34). The controller (34) is used to compare the detected temperature with the preset temperature and control the flow rate of the coolant by controlling the opening of the solenoid valve so that the detected temperature enters the preset temperature range.

9. A polishing apparatus for the outer surface of a metal coating according to claim 8, characterized in that, The preset temperature is 40℃~60℃.

10. A polishing apparatus for the outer surface of a metal coating according to claim 8, characterized in that, An audible and visual alarm is installed on the mounting bracket (1). The audible and visual alarm is electrically connected to the controller (34). When the detected temperature is greater than or equal to 65°C and the duration is greater than 30 seconds, the controller (34) controls the audible and visual alarm to start and trigger an alarm.

Images