Hairbrush millstone and polishing machine

Abstract

The utility model discloses a brush millstone and a polishing machine, and belongs to the technical field of sapphire processing. A plurality of polishing strips are planted in each brush bristle hole of the brush millstone, the polishing strips are made of hard polishing materials, bodies of the polishing strips are cuboids, and the ends, away from the millstone body, of the polishing strips are cut in a half-and-half mode in the long edge direction of the bottom face of the polishing strips to form first upper end polishing strips and second upper end polishing strips. And the ends, away from the grinding disc body, of the first upper-end polishing strip and the second upper-end polishing strip are subjected to corner cutting treatment, and bilaterally-symmetrical conical tips are formed. By means of the structural design, the tip ends of the bristles make contact with the sapphire surface more tightly and are more resistant to abrasion, so that the polishing effect is improved, and the service life is prolonged. The cuboid brush base enables the brush to be stressed more uniformly, the brush is not prone to collapse and deformation after being pressurized and polished for a long time, and the removal amount is stable; and the cleaning is easier, and the production efficiency and the product appearance yield are improved.

Description

Technical Field

[0001] This utility model relates to the field of sapphire processing technology, and in particular to a brush grinding disc and polishing machine. Background Technology

[0002] In the field of sapphire processing technology, brush polishing discs are mainly used for deburring and fine polishing of sapphire surfaces. The brush polishing disc acts as the upper plate, pressing the sapphire wafer onto an elastic polishing pad that rotates in the same direction. Polishing fluid flows continuously between the brush polishing disc, the sapphire wafer, and the polishing pad. The brush polishing disc and the polishing pad rotate simultaneously at high speed in opposite directions, continuously stripping away reaction products from the sapphire wafer surface. These products are carried away by the flow of polishing fluid, and new polishing fluid is added. The newly exposed sapphire wafer surface undergoes another chemical reaction, and the products are stripped away again. This process is repeated continuously. Through the combined action of the brush polishing disc, polishing pad, abrasive grains, and chemical reactants, the residual uneven layers and cracks after sapphire polishing are eliminated, ultimately resulting in a smooth and transparent ultra-fine sapphire surface.

[0003] However, in existing technologies, the bristles of brush grinding discs are mostly rectangular polishing strips, with multiple bristles embedded in the same bristle hole. This structure has the following problems:

[0004] 1. Short grinding disc life: The bristles are easily worn during use, resulting in a short grinding disc life.

[0005] 2. Easily deformed and softened: After prolonged use under pressure, the bristles are prone to deformation and softening, resulting in unstable removal volume and affecting the polishing effect.

[0006] 3. Difficult to clean: Due to the gaps between the bristles, the polishing liquid will crystallize during continuous polishing over a long period of time, depending on the processing, time, and temperature. These tiny crystal particles will move into the gaps between the bristles as the brush rotates at high speed, making cleaning difficult. If the bristles are deformed, the cleaning difficulty will be further increased.

[0007] These issues limit the effectiveness of existing brush grinding discs in sapphire processing, necessitating an improved brush grinding disc structure to overcome these shortcomings. Utility Model Content

[0008] This utility model addresses the aforementioned problems in the prior art by providing a brush grinding disc and a polishing machine.

[0009] The brush grinding disc provided by this utility model includes a grinding disc body;

[0010] Multiple concentric rings of holes are arranged on the lower surface of the grinding disc body, the holes including liquid outlet holes and brush bristle holes;

[0011] The liquid outlet holes are scattered on the grinding disc body;

[0012] Each of the brush bristle holes contains multiple polishing strips, which are made of a hard polishing material;

[0013] The polishing strip has a cuboid body. The end of the polishing strip away from the grinding disc body is cut in half along the long side of its bottom surface to form a first upper polishing strip and a second upper polishing strip. The ends of the first upper polishing strip and the second upper polishing strip away from the grinding disc body are chamfered to form symmetrical conical tips.

[0014] Preferably, the grinding disc body is circular.

[0015] Preferably, two polishing strips are embedded in each of the brush bristle holes.

[0016] Preferably, each of the brush bristle holes is incorporating four polishing strips.

[0017] Preferably, the length of the first upper polishing strip is equal to the length of the second upper polishing strip, and both are greater than or equal to 1 / 5 of the length of the polishing strip located outside the grinding disc body.

[0018] Preferably, the grinding disc body is provided with a polishing liquid outlet pipe, and the outlet hole is connected to the outlet pipe.

[0019] This utility model also provides a polishing machine, including the brush grinding disc as described above.

[0020] This invention has the following beneficial effects: Each brush hole of the brush grinding disc of this invention is inlaid with multiple polishing strips. The polishing strips are made of hard polishing material, and the main body of each polishing strip is a cuboid. The end of each polishing strip furthest from the grinding disc body is cut in half along its long bottom side to form a first upper polishing strip and a second upper polishing strip. The ends of the first and second upper polishing strips furthest from the grinding disc body are chamfered to form symmetrical conical tips. This structural design allows the tips of the bristles to make closer contact with the sapphire surface and are more wear-resistant, thereby improving the polishing effect and extending the service life. The cuboid brush base ensures more even force distribution on the brush, preventing it from softening and deforming under prolonged pressure polishing, and maintaining a stable removal rate. Because the polishing strip is designed in two at the top, the number of bristles can be reduced accordingly, decreasing the gaps between the bristles. Furthermore, the chamfered top of the polishing strip makes cleaning the bristles easier, improving production efficiency and product appearance yield. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the grinding disc body structure provided in an embodiment of the present utility model.

[0022] Figure 2This is a three-dimensional schematic diagram of the assembly of the grinding disc body and the brush bristles provided in an embodiment of the present utility model.

[0023] Figure 3 A side view of the assembly of the grinding disc body and brush bristles provided in an embodiment of this utility model.

[0024] Figure 4 A front view of the brush bristles provided for an embodiment of this utility model.

[0025] Figure 5 A three-dimensional view of the brush bristles provided for an embodiment of this utility model.

[0026] Figure 6 for Figure 2 A magnified view of a portion of the image.

[0027] In the attached diagram:

[0028] 10. Grinding disc body; 11. Liquid outlet hole; 12. Brush bristle hole; 13. Through hole.

[0029] 20. Polishing strip; 21. First upper polishing strip; 22. Second upper polishing strip; 23. Conical tip; 24. First arc edge; 25. Second arc edge. Detailed Implementation

[0030] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0031] The brush polishing disc provided by this utility model is used in the chemical polishing process of sapphire.

[0032] like Figure 1-6 As shown, this embodiment of the utility model provides a brush grinding disc, comprising:

[0033] The grinding disc body 10 includes multiple concentric rings of holes on its lower surface, including liquid outlet holes 11 and brush bristle holes 12. Figure 1 As shown, in some embodiments of this utility model, the grinding disc body is circular, and a through hole 13 is provided in the middle of the grinding disc body 10 for connecting a rotating mechanism. The rotating mechanism is used to drive the grinding disc body 10 to rotate. The diameter of the through hole 13 is 515mm, the diameter of the grinding disc body 10 is 1090mm, and 31 concentric holes are arranged around the center of the lower surface of the grinding disc body 10.

[0034] The outlet holes 11 are scattered on the grinding disc body 10. In practical applications, the distribution position of the outlet holes 11 is designed according to the polishing fluid supply path.

[0035] Each of the brush bristle holes 12 contains multiple polishing strips 20, which are made of a hard polishing material. In this embodiment of the invention, the polishing strips are made of sapphire sapwood with a hardness of 92-95, a polishing material widely used in sapphire processing.

[0036] like Figure 4-5 As shown in the embodiment of this utility model, the body of the polishing strip 20 is a cuboid. The end of the polishing strip 20 away from the grinding disc body 10 is cut in half along the long side of its bottom surface to form a first upper polishing strip 21 and a second upper polishing strip 22. The ends of the first upper polishing strip 21 and the second upper polishing strip 22 away from the grinding disc body 10 are chamfered to form symmetrical tapered tips 23.

[0037] Because of the gaps between the bristles, the polishing liquid is squeezed against the bristles during processing, causing the polishing liquid to crystallize and easily remain in the gaps between the bristles. If not cleaned in time, it will affect the grinding effect during subsequent continuous processing. Therefore, existing technology requires cleaning the machine after each processing cycle. If four rectangular polishing strips are installed in each bristle hole, the cleaning time for each brush disc is 30-40 minutes. Compared with the existing technology that uses rectangular polishing strips as bristles, this utility model embodiment processes the upper part of the rectangular polishing strip, while the lower part retains its original shape. The upper part is cut into two parts and beveled to form a symmetrical conical tip. This structural design allows the tips of the bristles to make closer contact with the sapphire surface and is more wear-resistant, thereby improving the polishing effect and extending the service life, reducing the frequency of brush and grinding disc replacements. The rectangular brush base ensures more even force distribution on the brush, preventing it from softening and deforming under prolonged pressure polishing, and maintaining a stable removal volume. Because the polishing strip has a split design at the top, the number of bristles can be reduced accordingly, minimizing the gaps between the bristles. In addition, the chamfered top of the polishing strip makes cleaning the bristles easier, thus significantly reducing the impact of polishing fluid crystallization on the processing effect, improving product scratches, white spots, and other appearance defects, and enhancing product performance and production efficiency.

[0038] In some embodiments of this invention, two polishing strips are embedded in each of the brush bristle holes. For example... Figure 6 As shown, two polishing strips are vertically aligned along the long side of the bottom surface and then inserted into the brush holes. Because this invention uses a hard, elongated polishing material and has undergone structural processing to divide the upper part of each polishing strip in two, the two polishing strips inserted into each brush hole are equivalent to having four small brush heads. Furthermore, the brush holes are arranged very densely, so inserting two polishing strips into each brush hole is sufficient to meet production requirements.

[0039] In other embodiments of this invention, four polishing strips are embedded in each of the brush bristle holes. Increasing the number of polishing strips may result in a better polishing effect, but it also increases the gaps between the bristles, leading to a longer cleaning time and potentially reducing the overall lifespan of the brush grinding disc. Incomplete cleaning may also reduce the yield rate of the product appearance.

[0040] In this embodiment of the present invention, the length of the first upper polishing strip is equal to the length of the second upper polishing strip, and both are greater than or equal to 1 / 5 of the length of the polishing strip located outside the grinding disc body.

[0041] In some embodiments of this invention, the apex of the tapered tip 23 is connected to the main body of the first upper polishing strip 21 and the second upper polishing strip 22 via a straight edge, and the angle at the top of the tapered tip 23 is less than 90°. The smaller the angle of the tapered tip, the sharper the top of the polishing strip. In practical applications, a suitable angle between the two straight edges is selected based on test results.

[0042] In other embodiments of this utility model, the apex of the tapered tip 23 is connected to the main body of the first upper polishing strip 21 and the second upper polishing strip 22 via an arc-shaped edge. For example... Figure 4 As shown, the conical tip 23 on the first upper polishing strip 21 is formed by the left and right symmetrical first arc edge 24 and second arc edge 25. The lower ends of the first arc edge 24 and the second arc edge 25 are tangent to the two sides of the first upper polishing strip 21, respectively. The upper ends of the first arc edge 24 and the second arc edge 25 intersect on the center line of the first upper polishing strip 21, forming the apex of the conical tip 23.

[0043] In practical applications, it is usually necessary to adjust the number, size, and structural parameters of the upper part of the polishing strip in the brush bristle holes according to the specific application scenario, such as the length of the first upper polishing strip and the angle of the tip. The optimal parameter combination is determined by comparing the product appearance yield and the brush grinding disc life.

[0044] Table 1 below compares the product yield and grinding disc lifespan of the brush grinding discs under 4-hour continuous processing conditions in several embodiments of this utility model. The column "Whether the bristles are cut" indicates whether the upper part of the bristles is cut; the column "Cut length ratio" indicates the proportion of the cut length to the length of the polishing strip outside the grinding disc body; and the column "Brush grinding disc lifespan" indicates the lifespan of the brush grinding disc, in units of "grinding". In embodiments 2 and 4, the upper part of the polishing strip is not cut in half, but its upper end is processed into a pointed shape. In embodiment 7, by planting two polishing strips in each bristle hole, the length of the first upper polishing strip and the length of the second upper polishing strip are equal to 2 / 3 of the length of the polishing strip outside the grinding disc body, achieving the best product yield and the longest grinding disc lifespan. Specifically, in embodiment 7, each polishing strip is 43mm long, has a bottom length of 7.3mm, a bottom width of 3mm, a length of 15mm for the part inside the grinding disc, a length of 28mm for the part outside the grinding disc, a height of 22mm for the first polishing strip and the second polishing strip, a height of 8mm for the conical tip, and the conical tip is formed by two symmetrical arc edges with a radius of 20.48mm.

[0045] Table 1 Comparison of structural parameters and processing effects of brush grinding discs in multiple embodiments

[0046]

[0047] In this embodiment of the invention, a polishing fluid outlet pipe is provided in the grinding disc body, and the outlet hole is connected to the outlet pipe. The polishing fluid can be replenished manually or automatically. An outlet pipe needs to be provided on the grinding disc body to allow the polishing fluid to flow into the grinding disc. If an automatic replenishment method is used, the automatic supply system delivers the polishing fluid from the supply tank to the machine, continuously circulating it. The operator only needs to periodically clean the machine and add or replace the polishing fluid or brush disc; manual replacement of auxiliary materials is not required, greatly reducing productivity.

[0048] This utility model embodiment also provides a polishing machine, including the brush grinding disc as described above.

[0049] This invention offers the following advantages: Each bristle hole of the brush grinding disc contains multiple polishing strips made of a hard polishing material. The main body of each polishing strip is rectangular. The end of the polishing strip furthest from the grinding disc body is cut in half along its long bottom side, forming a first upper polishing strip and a second upper polishing strip. The ends of both the first and second upper polishing strips furthest from the grinding disc body are chamfered to form symmetrical conical tips. This structural design allows the brush tips to make closer contact with the sapphire surface and are more wear-resistant, thereby improving the polishing effect and extending service life. The rectangular brush base ensures more even force distribution on the brush, preventing it from softening and deforming under prolonged pressure polishing, and maintaining a stable removal rate. Reduced brush gaps make cleaning easier, improving production efficiency and product appearance yield.

[0050] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many modifications under the guidance of the present invention without departing from the spirit and scope of the claims. All of these modifications are within the protection scope of the present invention.

Claims

1. A brush grinding disc, characterized in that, The brush grinding disc includes: Grinding disc body; Multiple concentric rings of holes are arranged on the lower surface of the grinding disc body, the holes including liquid outlet holes and brush bristle holes; The liquid outlet holes are scattered on the grinding disc body; Each of the brush bristle holes contains multiple polishing strips, which are made of a hard polishing material; The polishing strip has a cuboid body. The end of the polishing strip away from the grinding disc body is cut in half along the long side of its bottom surface to form a first upper polishing strip and a second upper polishing strip. The ends of the first upper polishing strip and the second upper polishing strip away from the grinding disc body are chamfered to form symmetrical conical tips.

2. The brush grinding disc according to claim 1, characterized in that, The grinding disc body is circular.

3. The brush grinding disc according to claim 1, characterized in that, Two polishing strips are embedded in each of the brush bristle holes.

4. The brush grinding disc according to claim 1, characterized in that, Each of the brush bristle holes contains four polishing strips.

5. The brush grinding disc according to claim 1, characterized in that, The length of the first upper polishing strip is equal to the length of the second upper polishing strip, and both are greater than or equal to 1 / 5 of the length of the polishing strip located outside the grinding disc body.

6. The brush grinding disc according to claim 1, characterized in that, The grinding disc body is provided with a polishing liquid outlet pipe, and the outlet hole is connected to the outlet pipe.

7. A polishing machine, characterized in that, Including the brush grinding disc as described in any one of claims 1-6.

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