Polishing process

Abstract

The application discloses a polishing process, which comprises the following steps: S1, polishing the edge and corner of a to-be-polished curved surface by using a first grinding brush in a CNC machine, the first grinding brush polishing the edge and corner back and forth along the tangent of each point, and the first grinding brush being a grinding brush containing alumina and diamond as abrasive materials; S2, polishing the whole to-be-polished curved surface by using a second grinding brush in the CNC machine, the second grinding brush being a grinding brush containing diamond as abrasive materials; and S3, polishing the to-be-polished curved surface by using a third grinding brush in the CNC machine, the third grinding brush being a grinding brush containing silicon carbide as abrasive materials, and the third grinding brush being used to remove marks generated in the polishing process. The polishing process can reduce labor cost, improve polishing efficiency and solve the problem that the edge and corner of a product surface cannot be completely polished.

Description

Technical Field

[0001] This application relates to the field of aluminum alloy polishing technology, specifically to a polishing process. Background Technology

[0002] Newly machined aluminum alloy products often have numerous machining marks or scratches on their surface. These defects require polishing to remove them. The product typically undergoes multiple processes, including polishing, repair, and finishing, to meet the required specifications. Since each process requires manual operation, a significant amount of manpower is needed, leading to high labor costs and low processing efficiency. Furthermore, the polishing process usually generates dust and noise, which can negatively impact the health of the workers.

[0003] Furthermore, during the manual polishing process, the polishing quality depends on the manual experience. When the surface of the product being polished is a 3D curved structure, the angles of each slope are different, which increases the difficulty of polishing the product, especially the roughness at the edges and corners of the product. Summary of the Invention

[0004] In view of the above, it is necessary to propose a polishing process to reduce labor costs, improve production efficiency, and solve the problem of poor polishing effect at the edges and corners of the product when polishing the entire surface of the product.

[0005] This application provides a polishing process, the polishing process including:

[0006] Step S1: Use the first grinding brush in the CNC machine to grind the corners of the surface to be ground. The first grinding brush grinds back and forth along the tangent of each point at the corner. The first grinding brush is a grinding brush containing alumina and diamond as abrasives.

[0007] Step S2: Use the second grinding brush in the CNC machine to grind the entire curved surface to be ground. The second grinding brush is a grinding brush containing diamond as an abrasive.

[0008] Step S3: Use the third grinding brush in the CNC machine to grind the surface to be ground. The third grinding brush is a grinding brush containing silicon carbide as abrasive. The third grinding brush is used to remove the marks produced by grinding.

[0009] The above-described polishing process involves first using a first polishing brush to repeatedly polish the edges and corners of the surface before polishing the entire surface. This removes any remaining tool marks. By first polishing the difficult-to-polish edges and corners, local defects on the product are eliminated. Compared to polishing the entire surface, this process solves the problem of tool marks at the edges and corners not being completely removed. Then, a second polishing brush is used to polish the entire surface to remove any remaining tool marks, reducing the roughness and making the surface smoother. Finally, a third polishing brush is used to remove any remaining tool marks, further reducing the roughness of the surface and resulting in a smooth and aesthetically pleasing product surface.

[0010] In some embodiments, the grinding direction of the first grinding brush is perpendicular to the diagonal of the surface to be ground.

[0011] In some embodiments, the feeding direction of the first grinding brush, the second grinding brush, and the third grinding brush is from the edge of the surface to be polished toward the center.

[0012] In some embodiments, the bristle diameter of the first abrasive brush is 18 mm.

[0013] In some embodiments, both the second and third abrasive brushes employ a circumferential abrasive grinding method on the entire surface to be polished.

[0014] In some embodiments, the bristle diameter of the second abrasive brush is larger than the bristle diameter of the first abrasive brush.

[0015] In some embodiments, the edge of the surface to be polished extends outward to form a plane, and the first polishing brush, the second polishing brush, and the third polishing brush begin polishing from the plane.

[0016] In some embodiments, the bristle diameter of the third abrasive brush is greater than the bristle diameter of the second abrasive brush.

[0017] In some embodiments, the polishing process further includes step S4: polishing the surface to be polished using a fourth polishing brush in a CNC machine tool, wherein the fourth polishing brush polishes the surface to be polished in a circumferential polishing manner.

[0018] In some embodiments, the fourth abrasive brush is an abrasive brush containing alumina as an abrasive. Attached Figure Description

[0019] Figure 1 This is a schematic flowchart of the polishing process provided in some embodiments of this application.

[0020] Figure 2 This is a schematic diagram of the grinding path for grinding the corners and edges of the curved surface to be ground.

[0021] Figure 3 This is a side view of the product to be polished in this embodiment.

[0022] Figure 4 This is a schematic diagram of the circular grinding path for grinding the curved surface to be ground.

[0023] Explanation of main component symbols

[0024] Product 100

[0025] Surface to be polished 10

[0026] 11 at the corner

[0027] Near the center 12

[0028] Slope 13

[0029] Plane 20 Detailed Implementation

[0030] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0031] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, it should be noted that "multiple" means two or more, unless otherwise explicitly specified.

[0032] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0033] The following will describe some embodiments of this application in detail with reference to the accompanying drawings.

[0034] Please see Figure 1 and Figure 2 This application provides a polishing process in some embodiments. The polishing process in this embodiment is used to polish a product 100 made of aluminum alloy. The product 100 is illustrated using a computer casing as an example, but is not limited to a computer casing. In other embodiments, the product 100 can also be a computer keyboard or cover. In this embodiment, the product 100 is a cuboid, and the surface 10 to be polished on the product 100 is a 3D curved surface. The polishing process in this embodiment is used to remove tool marks or scratches on the product 100. In other embodiments, the polishing process can also remove burrs from the product 100.

[0035] The polishing process includes the following steps: S1: The first polishing brush in the CNC machine tool is used to polish the corners 11 of the surface 10 to be polished. The first polishing brush polishes back and forth along the tangent of each point of the corner 11. The first polishing brush is a polishing brush containing alumina and diamond as abrasives.

[0036] S2: The entire curved surface 10 to be polished is polished using the second polishing brush in the CNC machine tool. The second polishing brush is a polishing brush containing diamond as an abrasive.

[0037] S3: Use the third grinding brush in the CNC machine to grind the curved surface 10 to be ground. The third grinding brush is a grinding brush containing silicon carbide as abrasive. The third grinding brush is used to remove the marks produced by grinding.

[0038] In the original manual polishing process, product 100 first undergoes cross-regional logistics (manually transferring the processed product 100 to the polishing workshop), rough polishing, manual repair, manual finishing, water blowing, inspection, and film application. To meet mass production needs, each process requires a large amount of manpower, resulting in excessive labor costs. When product 100 passes through each process, it is moved by operators to the next process for processing. Due to the large number of processes, product 100 is moved around many times, thus prolonging the polishing time and reducing the polishing efficiency. In addition, noise and dust are generated during the polishing process. Since operators work in this environment, they inevitably inhale dust and are affected by noise. In the long run, this working environment will inevitably harm the health of the operators.

[0039] When using a CNC machine for fully automated grinding, the operator first mounts the blank onto the CNC machine. The CNC machine then automatically processes the blank according to the machining program to produce product 100. Next, the CNC machine grinds the curved surface 10 of product 100. The CNC machine can process the blank into product 100 by changing different cutting tools, and can perform rough grinding, repair, and finishing operations on product 100 by changing different grinding brushes. By adopting this grinding process, product 100 does not need to be transferred between different machines or workstations, thus reducing the number of times product 100 needs to be handled, thereby improving the grinding efficiency of product 100.

[0040] This polishing process requires only one CNC machine to polish product 100. Since manual polishing is eliminated, it reduces labor input, lowers labor costs, and improves polishing efficiency. Furthermore, because product 100 remains inside the CNC machine during polishing, dust generated is less likely to escape, thus improving the working environment. During the polishing process, operators do not come into contact with the product being polished, thus avoiding noise interference.

[0041] For ease of description, the surface 10 to be polished is divided into corners 11 and near-center 12. Corners 11 are the four corners of product 100, and near-center 12 are the remaining parts excluding corners 11. Because the surface 10 to be polished is a 3D curved surface structure with varying inclination angles on each slope, especially the corners 11 which are transition surfaces formed by the intersection of multiple slopes, the shape of corners 11 is quite complex. This makes it difficult for the polishing tool to properly conform to the transition surfaces on product 100 during a single overall polishing process (i.e., using only one polishing brush for overall polishing). Consequently, the tool marks at the corners 11 cannot be completely removed, resulting in incomplete removal of surface defects on product 100. Therefore, to solve the above problems, the CNC machine tool first uses a first grinding brush to grind the corners 11 separately. By first grinding the corners 11 that are difficult to grind, the machining marks on the corners 11 of the product 100 are eliminated, thus solving the problem that the machining marks remaining on the corners 11 of the product 100 cannot be completely eliminated. Then, a second grinding brush is used to grind the entire surface 10 to be ground, thereby eliminating the remaining machining marks on the entire surface 10 to be ground, reducing the roughness of the entire surface 10 to be ground, and making it smoother. Finally, a third grinding brush is used to eliminate the tool marks left during the grinding process, thereby further reducing the surface roughness of the surface 10 to be ground on the product 100, and thus improving the surface smoothness of the product 100.

[0042] When a CNC machine tool uses sandpaper to polish product 100, additional equipment is required, with each piece of equipment equipped with a different type of sandpaper. This additional equipment necessitates the product 100 being moved between multiple machines, reducing work efficiency. However, when a grinding brush is used, the CNC machine tool can automatically change the brush, allowing the polishing operation to be completed on a single machine. This reduces the number of times product 100 needs to be moved, improving polishing efficiency. Compared to sandpaper, grinding brushes have a longer lifespan, saving costs. Furthermore, the surface 10 to be polished does not require high precision from the CNC machine tool; therefore, older, less precise, idle equipment can be reused, further reducing equipment costs.

[0043] The abrasive grains in the first abrasive brush include both diamond and alumina. Because diamond abrasive grains are hard and remove a large amount of material, while removing machining marks, they also leave grinding marks on the surface 10 to be polished. Alumina, on the other hand, is softer than diamond abrasive grains and removes less material. While removing machining marks with alumina, it also leaves grinding marks, but the texture is finer, and the marks left by alumina are less noticeable compared to diamond. When polishing the product using the first abrasive brush, diamond is used to remove machining marks on the surface 10 to quickly reduce surface roughness, while alumina simultaneously grinds the polished surface 10 to reduce the grinding marks left by diamond polishing. By using both types of abrasive grains simultaneously, the edges 11 of the product 100 are less likely to leave noticeable grinding marks while removing machining marks.

[0044] Compared to the diamond on the second abrasive brush, the silicon carbide on the third abrasive brush is softer and removes less material during grinding. Therefore, the grinding marks left on the surface 10 to be ground are relatively smaller. By using the third abrasive brush to grind the surface 10, the grinding marks left by the diamond grinding can be removed, thereby reducing the surface roughness.

[0045] Please see Figure 2 In some embodiments, the abrasive grains of the first grinding brush are 320# and the diameter of the bristles is 18mm.

[0046] During the polishing process, the CNC machine tool drives the first grinding brush to approach the corner 11 of the surface 10 to be polished and presses the first grinding brush onto the surface 10. Since the surface 10 is curved, the top of the surface has the largest contact area with the first grinding brush, while the contact area on both sides of the top is smaller. When the first grinding brush polishes, the amount removed from the top of the surface is large, while the amount removed from the sides is small, resulting in uneven polishing. The larger the brush bristle diameter, the more amplified this uneven polishing becomes, affecting the polishing effect and leading to poor results. Therefore, using a smaller-sized grinding brush is beneficial for ensuring the polishing effect of product 100. However, when the brush bristle diameter is less than 18mm, the polishing efficiency will decrease significantly.

[0047] In addition, the second reason why this polishing process cannot use a larger polishing brush is that since the first polishing brush is used for polishing the corners 11, the first polishing brush is closer to the edge of the product 100. When a larger polishing brush is used, the first polishing brush will interfere with the CNC machine tool, thereby affecting the normal operation of the CNC machine tool.

[0048] Please see Figure 2In some embodiments, the grinding direction of the first grinding brush is perpendicular to the diagonal of the surface 10 to be ground. In this embodiment, the first grinding brush passes through 15 times. When the number of passes is greater than 15, the grinding efficiency is low; when the number of passes is less than 15, the grinding effect is difficult to guarantee. The feed speed of the first grinding brush is 8000mm / min-9000mm / min, and the rotation speed is 4000r / min-8000r / min. When the rotation speed is lower than 4000r / min, the surface roughness of the surface to be ground 10 is high, and the grinding effect is poor. When the rotation speed is higher than 8000r / min, the improvement effect on the surface roughness of the surface to be ground 10 is not obvious. The feed speed often affects the surface roughness of the product 100. A slow feed speed is beneficial to improving the surface roughness, while a fast feed speed will result in a large surface roughness of the product 100. However, the specific parameter selection should be determined according to processing requirements and economic factors. Since the first grinding brush belongs to the rough grinding process, it is not necessary to use an excessively small feed speed. When the feed speed is lower than 8000mm / min, the grinding efficiency will be low, affecting the production progress. When the feed speed is higher than 9000mm / min, the surface roughness of the product 100 is poor, and the grinding effect is not good.

[0049] Specifically, the first abrasive brush also performs a feed motion when polishing product 100, that is, the first abrasive brush moves from the edge of product 100 towards the center. Figure 3 It can be seen that the edge contour of the surface 10 to be polished is a slope 13 at a certain angle. When the first polishing brush moves towards the center of the product 100, the first polishing brush moves towards the slope 13. At this time, the front end of the first polishing brush can always be in contact with the surface 10 to be polished, so that the first polishing brush maintains a large polishing force. However, when the first polishing brush feeds from the center of the product 100 to the edge, the first polishing brush moves along the slope 13. At this time, the front end of the first polishing brush gradually separates from the surface 10 to be polished, resulting in a smaller polishing force during polishing. When the polishing force is small, the polishing brush is not enough to polish away the machining marks on the product 100, thus affecting the polishing effect.

[0050] In some embodiments, the abrasive grains of the second grinding brush are 320#, and the bristle diameter is 50mm. Because the second grinding brush needs to grind the entire surface 10 to be ground, in order to ensure grinding efficiency, the bristle diameter of the second grinding brush is larger than that of the first grinding brush. Since the coarser the bristles, the larger the contact area between the bristles and the product 100, the more metal the second grinding brush removes from the surface 10 to be ground. Therefore, a larger grinding brush is beneficial to improving the grinding efficiency of the entire surface 10 to be ground. The feed speed of the second grinding brush is 8000mm / min-9000mm / min, and the rotation speed is 3500r / min-9000r / min. When the rotation speed is lower than 3500r / min, the surface roughness of the surface to be ground 10 is high, and the grinding effect is poor. When the rotation speed is higher than 9000r / min, the improvement effect on the surface roughness of the surface to be ground 10 is not obvious. Since the second grinding brush is mainly used to remove the machining marks on the entire surface to be ground 10, it is not necessary to use an excessively small feed speed. When the feed speed is lower than 8000mm / min, the grinding efficiency will be low, affecting the production progress. When the feed speed is higher than 9000mm / min, the surface roughness of the product 100 is poor, and the grinding effect is not good.

[0051] Please see Figure 4 In some embodiments, the second grinding brush makes 20 passes. When the number of passes is greater than 20, the grinding efficiency tends to decrease; when the number of passes is less than 20, the grinding effect is difficult to guarantee. Specifically, the feed motion of the second grinding brush is also from the edge of the product 100 towards the center.

[0052] In some embodiments, the abrasive grains of the third grinding brush are 400#, and the bristle diameter is 60mm. Since silicon carbide is softer than diamond, when the surface 10 to be ground is ground by silicon carbide, the silicon carbide can remove the tool marks left by the diamond and make the surface 10 to be ground smoother. In addition, the mesh number of silicon carbide is greater than that of diamond in step S2, which also helps to improve the grinding effect of the third grinding brush and make the surface 10 to be ground smoother. When the third grinding brush grinds the surface 10 to be ground, it helps to reduce the surface roughness of the surface 10 to be ground and eliminate the grinding tool marks generated in the aforementioned steps.

[0053] The feed speed of the third grinding brush is 1500mm / min-4000mm / min, and the rotation speed is 2000r / min-5000r / min. When the rotation speed is below 2000r / min, the surface roughness of the surface to be ground 10 is high, and the grinding effect is poor. When the rotation speed is above 5000r / min, the improvement effect on the surface roughness of the surface to be ground 10 is not obvious. Since the third grinding brush is mainly used to remove the grinding marks on the entire surface to be ground 10 to repair the surface of product 100, it is not necessary to use an excessively high feed speed. When the feed speed is below 1500mm / min, the grinding efficiency will be low, affecting the production progress. When the feed speed is above 4000mm / min, the surface roughness of product 100 is poor, and the repair effect is not good.

[0054] Please see Figure 4 In some implementations, to balance grinding efficiency and grinding effect, the third grinding brush makes two passes. When the number of passes is greater than two, grinding efficiency tends to decrease; when the number of passes is less than two, the grinding effect is difficult to guarantee. Specifically, the feed motion of the third grinding brush is also from the edge of the product 100 towards the center.

[0055] Please see Figure 3 Since all three types of abrasive brushes start grinding from the edge of product 100, when the three types of abrasive brushes grind product 100, they will grind to the edge of product 100, which will cause the edge of product 100 to collapse. Here, the collapse refers to the junction of two right-angled sides being ground into an arc transition. Since the production requirements of product 100 do not allow the collapse defect, product 100 will become a defective product 100 after the collapse occurs. Under the premise of ensuring that product 100 does not have the collapse phenomenon and ensuring that the abrasive brushes cover the curved surface 10 to be ground as much as possible, the grinding difficulty is undoubtedly increased.

[0056] To address the aforementioned edge collapse issue, a plane 20 of a certain width is extended outward from the edge of the curved surface 10 to be polished. In this embodiment, the width of plane 20 is 7.8 mm. In other embodiments, the width of plane 20 can be larger or smaller, depending on the specific circumstances. When the three types of polishing brushes move to the edge of the curved surface 10 to be polished, the bristles of the three types of polishing brushes will touch plane 20. When polishing begins, the polishing brushes will polish plane 20 instead of the edge. Since plane 20 prevents the three types of polishing brushes from polishing the edge of product 100, edge collapse is avoided, thus improving the pass rate of product 100. In addition, by extending plane 20, the polishing brushes can avoid polishing the edge while still covering the curved surface 10 to be polished as much as possible, thereby reducing the polishing difficulty of product 100.

[0057] Please see Figure 4In some embodiments, the polishing process further includes step S4: using a fourth polishing brush in a CNC machine to polish the surface 10 to be polished. The fourth polishing brush polishes the surface 10 in a circumferential polishing manner to further reduce the surface roughness of the surface 10 to be polished, thereby making the surface of the product 100 smooth and improving the surface finish of the product 100; the feed direction of the fourth polishing brush is from the edge of the product 100 to the center. The bristles of the fourth polishing brush contain alumina abrasive grains with a mesh size of 600#.

[0058] Compared to silicon carbide, alumina is softer. Therefore, alumina removes less surface metal from the surface of the curved surface 10 to be polished, leaving fewer polishing marks. By further polishing the curved surface 10 with alumina, the tool marks left by silicon carbide polishing can be removed, making the surface 10 smoother, further reducing surface roughness, and making the product 100 glossy, achieving the purpose of finishing.

[0059] Since the abrasive grains of the fourth grinding brush are larger than those of the third grinding brush, the abrasive grains on the fourth grinding brush are finer than those on the third grinding brush. Therefore, using a fourth grinding brush with a larger abrasive grain can further reduce the surface roughness of the product by 100% during grinding.

[0060] The feed speed of the fourth grinding brush is 1000mm / min-3000mm / min, and the rotation speed is 1000r / min-3500r / min. When the rotation speed is below 1000r / min, the surface roughness of the surface to be ground 10 is high, and the grinding effect is poor. When the rotation speed is above 3500r / min, the improvement effect on the surface roughness of the surface to be ground 10 is not obvious. Since the fourth grinding brush is mainly used to further remove the grinding marks on the entire surface to be ground 10 to polish the surface of the product 100, it is not necessary to use an excessively high feed speed. When the feed speed is below 1000mm / min, the grinding efficiency will be low, affecting the production progress. When the feed speed is above 3000mm / min, the surface roughness of the product 100 is poor, and the polishing effect is not good.

[0061] The fourth grinding brush makes two passes. More than two passes reduce polishing efficiency, while fewer than two passes make it difficult to guarantee the polishing effect. Furthermore, using the fourth grinding brush to perform a fourth polishing of product 100 significantly improves the yield rate of product 100. After four polishing passes, the workpiece's surface roughness requirements are met. Performing a fifth polishing pass would lead to a decrease in production efficiency.

[0062] This embodiment uses the yield of 100 products produced within one month as an example to compare the manual polishing process with the polishing process in this embodiment.

[0063]

[0064]

[0065] In the table, the input number represents the total number of products 100 produced, and the number of good products represents the number of qualified products 100. The original full inspection yield of products 100 polished manually was 91.5%, while statistics show that the full inspection yield of products 100 polished by CNC machine tools is now 91.6%, which has reached the yield rate of the original manual polishing.

[0066] The working process of the polishing process provided in some embodiments is roughly as follows:

[0067] First, the blank is placed on a CNC machine tool, which selects an appropriate tool according to the machining program to process the blank into product 100. Then, the CNC machine tool changes the tool, using a first abrasive brush with alumina and diamond abrasive grains to grind the edges 11 of the surface 10 to be ground, and reciprocates along the surface 10 15 times to remove machining marks. Next, the CNC machine tool replaces the first abrasive brush with a second abrasive brush containing diamond abrasive grains, and makes 20 circular cuts along the entire surface 10 to remove all tool marks. Through these two steps, product 100 has been processed... The tool marks are removed; next, the CNC machine tool replaces the second grinding brush with a third grinding brush with silicon carbide abrasive, and makes two circular cuts along the entire surface 10 to be ground to remove the grinding marks, thereby reducing the surface roughness of the surface 10 to repair the surface of product 100; finally, the CNC machine tool replaces the third grinding brush with a fourth grinding brush with alumina abrasive, and makes two circular cuts along the entire surface 10 to be ground to perform a finishing process on the entire surface 10 to further reduce the roughness of the surface 10, thereby making the surface of product 100 smooth and beautiful.

[0068] The polishing process provided in this application embodiment, when using a CNC machine to fully automatically polish product 100, includes processes such as machining, rough grinding, manual repair, and manual finishing. The CNC machine can process the blank into product 100 by changing different cutting tools, and can sequentially perform rough grinding, repair, and finishing operations on product 100 by changing different grinding brushes. By adopting this polishing process, product 100 does not need to be transferred between different devices or workstations, thereby improving the polishing efficiency of product 100 by reducing the number of times product 100 is transferred.

[0069] In addition, since the product 100 is always inside the CNC machine tool when it is being polished, the dust generated by polishing is not easy to spill out, thus improving the working environment; during the polishing process, since the operators do not come into contact with the product being polished, the operators are also avoided from being disturbed by noise.

[0070] The precision requirements of the CNC machine tool for the surface to be polished 10 are not high. Therefore, idle equipment with a long service life and relatively poor precision can be reused, thus making full use of the old equipment and saving the cost of purchasing new equipment.

[0071] Because diamond abrasive grains are hard and remove a large amount of material, while removing machining marks, they also leave grinding marks on the surface 10 to be polished. Alumina, on the other hand, is softer than diamond abrasive grains and removes less material. While it also leaves grinding marks, these are less noticeable than those left by diamond. When polishing the product with the first abrasive brush, diamond is used to remove machining marks from the surface 10 to quickly reduce surface roughness, while alumina simultaneously grinds the polished surface 10 to reduce the grinding marks left by diamond. By using both abrasive grains simultaneously, the edges 11 of the product 100 are less likely to leave noticeable grinding marks while removing machining marks, thus reducing surface roughness. Compared to diamond, silicon carbide is softer and requires less material to be removed during polishing. Therefore, the polishing marks left on the surface 10 to be polished are relatively smaller. By using the third polishing brush to polish the surface 10, the polishing marks left by diamond polishing can be removed, thereby reducing the surface roughness and repairing the surface of product 100.

[0072] Among the four abrasive brushes, alumina is the softest. Therefore, alumina removes the least amount of surface metal from the surface of the curved surface 10 to be polished, leaving fewer polishing marks. By using the fourth abrasive brush to further polish the curved surface 10, the tool marks left by silicon carbide polishing can be removed, making the curved surface 10 more delicate, further reducing surface roughness, and making the product 100 smooth, achieving the purpose of finishing.

[0073] In this polishing process, the CNC machine tool first uses a first polishing brush to polish the corners 11 separately. By polishing the corners 11 that are difficult to polish first, the machining marks at the corners 11 of the product 100 are eliminated, thus solving the problem that the machining marks remaining at the corners 11 of the product 100 cannot be completely eliminated. Then, a second polishing brush is used to polish the entire surface 10 to be polished, thereby eliminating the remaining machining marks on the entire surface 10 to be polished, reducing the surface roughness of the entire surface 10 to be polished. Finally, a third and a fourth polishing brush are used to eliminate the tool marks left during the polishing process, further reducing the surface roughness of the surface 10 to be polished, so that the product 100 meets the production requirements.

[0074] It will be apparent to those skilled in the art that this application is not limited to the details of the exemplary embodiments described above, and that this application can be implemented in other specific forms without departing from the spirit or essential characteristics of this application. Therefore, the embodiments should be regarded as exemplary and non-limiting in all respects, and the scope of this application is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be embraced within this application.

[0075] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this application without departing from the spirit and scope of the technical solutions of this application.

Claims

1. A lapping process characterized by, Comprising: Step S1: polishing the edge of the surface to be polished by a first polishing brush in the CNC machine, the first polishing brush polishing back and forth along the tangent of each point on the edge, the first polishing brush being a polishing brush containing alumina and diamond as abrasive materials; Step S2: replacing the first polishing brush with a second polishing brush in the CNC machine, and polishing the entire surface to be polished by the second polishing brush in the CNC machine, the second polishing brush being a polishing brush containing diamond as abrasive materials; Step S3: replacing the second polishing brush with a third polishing brush in the CNC machine, and polishing the surface to be polished by the third polishing brush in the CNC machine, the third polishing brush being a polishing brush containing silicon carbide as abrasive materials, the third polishing brush being used to remove the traces generated by polishing; Step S4: polishing the surface to be polished by a fourth polishing brush in the CNC machine, the fourth polishing brush polishing the surface to be polished in a surrounding manner; The edge of the surface to be polished extends outwardly to a plane, the first polishing brush, the second polishing brush and the third polishing brush start polishing from the plane, the diameter of the bristles of the second polishing brush is greater than the diameter of the bristles of the first polishing brush, the diameter of the bristles of the third polishing brush is greater than the diameter of the bristles of the second polishing brush, and the mesh number of abrasive particles of the fourth polishing brush is greater than the mesh number of abrasive particles of the third polishing brush.

2. The polishing process according to claim 1, wherein The polishing direction of the first polishing brush is perpendicular to the diagonal of the surface to be polished.

3. The polishing process according to claim 1, wherein The feeding direction of the first polishing brush, the second polishing brush and the third polishing brush is from the edge of the surface to be polished to the center.

4. The polishing process according to claim 3, wherein The diameter of the bristles of the first polishing brush is 18mm.

5. The polishing process according to claim 1, wherein The second polishing brush and the third polishing brush both adopt the surrounding polishing manner for the entire surface to be polished.

6. The polishing process according to claim 1, wherein The fourth polishing brush is a polishing brush containing alumina as abrasive materials.

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