A polishing table and polishing system for polishing mobile phone lens boards

Abstract

The application is suitable for the technical field of polishing equipment, and provides a polishing table and a polishing system for polishing of a mobile phone lens plate. A surface of the polishing table in the axial direction is a mounting surface, which is used for receiving polishing liquid flowing from the circumferential edge of the polishing table; the mounting surface is further provided with three mounting grooves, which are rotationally symmetrical around the axis of the polishing table, and the mounting grooves are used for mounting the mobile phone back plate; the mounting grooves have a first region and a second region distributed along the length direction thereof, the first region is arranged close to the axis of the polishing table, and the second region is arranged close to the circumferential edge of the polishing table; the first region corresponds to the lens plate at the top of the mobile phone back plate, and the second region corresponds to the bottom region of the mobile phone back plate. According to the application, the mounting grooves are centrally arranged on the surface of the polishing table, so that, when the mobile phone back plate is mounted in the mounting grooves, the contact effects of the multiple lens plates with the polishing liquid and with the upper grinding disc are as same as possible, thereby reducing the polishing effect difference between the multiple lens plates.

Description

Technical Field

[0001] This invention belongs to the field of polishing equipment technology, specifically relating to a polishing table and polishing system for polishing mobile phone lens plates. Background Technology

[0002] On the back panel of existing smartphones, the area used to mount the lens, i.e., the lens plate, is usually higher than other areas of the back panel. Therefore, when polishing the back panel of a phone, the lens plate needs to be polished separately.

[0003] During the polishing process of the lens plate, the phone back panel is placed on the surface of the polishing table, and the upper grinding disc is positioned above the polishing table to polish the lens plate. Since the polishing fluid is introduced into the polishing table from the upper grinding disc, it is difficult to ensure that the contact effect between each lens plate and the polishing fluid is the same, and it is also difficult to ensure that the contact between the upper grinding disc and each lens plate is the same, resulting in differences in the polishing effect between multiple lens plates. Summary of the Invention

[0004] The purpose of this application is to provide a polishing table and polishing system for polishing mobile phone lens plates, thereby solving the aforementioned technical problems existing in the background art.

[0005] This application is implemented as follows:

[0006] In a first aspect, this application provides a polishing table for polishing a mobile phone lens plate. One axial surface of the polishing table is a mounting surface for receiving polishing liquid flowing in from the circular periphery of the polishing table. The mounting surface is also provided with three mounting grooves, which are rotationally symmetrical about the axis of the polishing table. The mounting grooves are used to mount a mobile phone back panel. Each mounting groove has a first region and a second region distributed along its length. The first region is located near the axis of the polishing table, and the second region is located near the circular periphery of the polishing table. The first region corresponds to the lens plate at the top of the mobile phone back panel, and the second region corresponds to the bottom region of the mobile phone back panel.

[0007] Secondly, this application provides a polishing system for polishing mobile phone lens plates, including an upper grinding disc, a polishing fluid delivery pipe, and a polishing table provided in the first aspect; the mounting surface of the polishing table and the upper grinding disc are arranged face to face, and the outlet surface of the polishing fluid delivery pipe is arranged towards the gap between the polishing table and the upper grinding disc.

[0008] The technical solution provided in this application can achieve the following beneficial effects:

[0009] In this application, by setting the mounting slots to be rotationally symmetrical about the axis of the polishing table, the first area of ​​the mounting slots is concentrated around the axis of the polishing table, thereby making the contact effect between multiple mobile phone back panels in different first areas and the polishing liquid as similar as possible. By limiting the number of mounting slots, the tightness of the mounting slot arrangement is improved, and the area of ​​the circumcircle corresponding to the first area of ​​multiple mounting slots is reduced, further reducing the difference in the contact effect between different lens plates and the polishing liquid, thereby making the polishing effect among multiple lens plates as similar as possible. In addition, the three mounting slots are rotationally symmetrical, and the gap between two adjacent mounting slots corresponds to another mounting slot, so that the polishing liquid flowing from the gap between two adjacent mounting slots can flow into the other mounting slot, avoiding the situation where the polishing liquid flows directly from the gap between two adjacent mounting slots to outside the polishing table, thereby improving the utilization rate of the polishing liquid. Attached Figure Description

[0010] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 This is a schematic diagram of the overall structure of the polishing table provided in some embodiments of this application;

[0012] Figure 2 This is a top view of the polishing table provided in some embodiments of this application. Figure 1 ;

[0013] Figure 3 This is a top view of the polishing table provided in some embodiments of this application. Figure 2 ;

[0014] Figure 4 This is a top view of the polishing table provided in some embodiments of this application. Figure 3

[0015] Figure 5 This is a schematic diagram of a mobile phone back panel structure adapted to a polishing table provided in some embodiments of this application. Figure 1 ;

[0016] Figure 6 This is a schematic diagram of a mobile phone back panel structure adapted to a polishing table provided in some embodiments of this application. Figure 2

[0017] Figure 7 This is a schematic diagram showing the interaction between the polishing table and the back panel of a mobile phone provided in some embodiments of this application;

[0018] Figure 8This is a schematic diagram of the polishing system structure provided in some embodiments of this application.

[0019] In the diagram: 100-polishing table, 110-mounting surface, 111-mounting groove, 111a-first long side, 111b-second long side, 111c-first short side, 111d-second short side, 112-flow gap, 113-guide channel, 113a-inlet, 113b-outlet, 200-upper grinding disc, 300-polishing fluid delivery pipe, 400-phone backplate, 410-lens plate. Detailed Implementation

[0020] The following description provides many different embodiments or examples for implementing various features of the invention. The elements and arrangements described in the specific examples below are only for concise expression of the invention and are merely examples, not intended to limit the invention.

[0021] In related technologies, the phone's back panel is placed on the surface of a lower grinding disc, and an upper grinding disc is used to polish the lens plate on the phone's back panel. A pipe is also installed on the upper grinding disc to deliver polishing fluid to the lower grinding disc, where the polishing fluid, in conjunction with the lower grinding disc, polishes the lens plate. However, in actual polishing processes, it was found that the polishing effects of multiple lens plates differed, even among multiple lens plates polished in the same batch.

[0022] Further research revealed that the differences in polishing effects were due to variations in the contact between the lens plate and the upper and lower grinding discs, as well as the polishing slurry. Specifically, during the polishing process, both the upper and lower grinding discs rotate under the drive of a power mechanism. Simultaneously, the lower grinding disc reciprocates along a linear direction. The contact area between the upper grinding disc and the lens plate constantly changes. Furthermore, the upper grinding disc has a polishing slurry delivery pipe, but the pipe outlet cannot polish the lens plate. Therefore, it's impossible to guarantee that the contact between the upper grinding disc and each lens plate is identical during polishing, leading to differences in polishing effects across multiple lens plates. Additionally, because the contact area between the upper grinding disc and the lens plate is constantly changing, the placement of the polishing slurry as it is introduced onto the lower grinding disc also changes during the introduction of the slurry. This results in unstable contact between the polishing slurry and the lens plate, making it impossible to guarantee uniform contact between each lens plate and the polishing slurry, thus causing differences in polishing effects across multiple lens plates.

[0023] Therefore, embodiments of this application provide a polishing table 100 for polishing a mobile phone lens plate 410, combined with Figures 1 to 7 As shown, this reduces the difference in polishing effect between multiple lens plates 410.

[0024] One axial surface of the polishing table 100 is a mounting surface 110, which receives polishing fluid flowing in from the circumferential edge of the polishing table 100. The polishing table 100 is equivalent to a lower grinding disc in related technologies, used to place the mobile phone back panel 400. The polishing table 100 can rotate under the drive of a power mechanism, and its rotation axis during rotation is the axis of the polishing table 100. The axial direction of the polishing table 100 is the axial direction of the polishing table 100, the mounting surface 110 is the surface located in the axial direction of the polishing table 100, and the circumferential edge of the polishing table 100 is the edge of the circumferential sidewall of the polishing table 100. The polishing liquid flows into the mounting surface 110 from the circumference of the polishing table 100, avoiding the need to set up pipes on the upper grinding disc 200 to transport the polishing liquid. During the polishing process of the upper grinding disc 200 on the lens plate 410, there is no area on the upper grinding disc 200 that cannot be polished, so that the contact effect of the upper grinding disc 200 on each lens plate 410 can be made as uniform as possible.

[0025] Three mounting slots 111 are provided on the mounting surface 110. These three slots are symmetrically arranged around the axis of the polishing table 100 and evenly distributed on the mounting surface 110. The mounting slots 111 are used to mount the phone back panel 400. Before polishing the phone back panel 400, it is placed directly into the mounting slot 111. The mounting slot 111 restricts the position of the phone back panel 400, ensuring stable contact between the phone back panel 400 and the upper polishing disc 200. (See reference...) Figure 1 As shown.

[0026] Since the mounting slot 111 is used to mount the mobile phone back panel 400, corresponding to the mobile phone back panel 400, the mounting slot 111 has a length direction and a width direction. The length direction of the mounting slot 111 corresponds to the long side direction of the mobile phone back panel 400, and the width direction of the mounting slot 111 corresponds to the short side direction of the mobile phone back panel 400. The mounting slot 111 has a first region and a second region distributed along its length direction. The first region is located near the axis of the polishing table 100, and the second region is located near the peripheral edge of the polishing table 100. When the mobile phone back panel 400 is mounted in the mounting slot 111, the first region corresponds to the lens plate 410 at the top of the mobile phone back panel 400, and the second region corresponds to the bottom region of the mobile phone back panel 400.

[0027] By rotating the three mounting slots 111 symmetrically around the axis of the polishing table 100, the first area of ​​the mounting slots 111 is concentrated around the axis of the polishing table 100. Since the first area is concentrated, after the polishing liquid is introduced from the circumference of the polishing table 100 to the mounting surface 110, the contact effect between the multiple lens plates 410 corresponding to the first area and the polishing liquid is similar, which makes it easier to provide the contact effect of the polishing liquid on the lens plate 410, thereby reducing the impact of the polishing liquid on the polishing effect of the lens plate 410.

[0028] The three mounting slots 111 are rotationally symmetrical about the axis of the polishing table 100. Since a certain gap is required between adjacent mounting slots 111 to facilitate the flow of polishing fluid, the three mounting slots 111 are arranged more closely than the case with four mounting slots 111. With the three mounting slots 111, the first area of ​​each slot can be positioned close to the axis of the polishing table 100 without worrying about a lack of gap between adjacent slots. With a four-slot structure, if the first area of ​​each slot is too close to the axis of the polishing table 100, the gap between adjacent slots would be too small, or even nonexistent. Therefore, the three mounting slots allow for a more compact arrangement, resulting in a smaller diameter of the common circumscribed circle of the first areas of all three slots. This allows the polishing fluid to more easily and simultaneously immerse the first area, ensuring that the contact effect between the lens plate 410 corresponding to the first area and the polishing fluid is as uniform as possible, thus achieving a more consistent polishing effect across multiple lens plates 410. The circumcircle of the first region refers to the circle formed by the points of the multiple first regions furthest from the axis of the polishing table 100. The smaller the diameter of this circle, the closer the first regions are to each other. Similarly, during the contact with the upper grinding disc 200, the smaller the area occupied by the first region of the three mounting slots 111, the more stable the contact with the upper grinding disc 200, avoiding the probability of the upper grinding disc 200 only contacting the part of the lens plate 410 corresponding to the first region.

[0029] Furthermore, in this layout, the directions of the flow gaps 112 formed between adjacent mounting slots 111 are all different. The flow gap 112 formed between any two adjacent mounting slots 111 extends in the direction of the other mounting slot 111. That is, after the polishing slurry is introduced into the mounting surface 110 from the periphery of the polishing table 100, some of the polishing slurry flows into the flow gap 112 and then flows to the other mounting slot 111, immersing the first area of ​​the other mounting slot 111. If four mounting slots 111 are provided, the gap between two adjacent mounting slots 111 corresponds to the gap formed between the remaining two mounting slots 111. Some polishing slurry flows directly from one gap to another and then flows out of the mounting surface 110. This portion of polishing slurry does not contact the lens plate 410 corresponding to the first area, resulting in some waste of polishing slurry. Therefore, providing three mounting slots 111 can improve the utilization rate of the polishing slurry and avoid waste.

[0030] A flow gap 112 is provided between two adjacent mounting slots 111 to allow polishing fluid to flow, enhancing the fluidity of the polishing fluid on the mounting surface 110. When the phone backplate 400 is mounted in the mounting slot 111, the surface of the lens plate 410 is higher than the mounting surface 110, ensuring contact between the upper grinding disc 200 and the lens plate 410. During the polishing process of the lens plate 410, in addition to ensuring good contact between the polishing fluid and the lens plate 410, it is also necessary to ensure the replacement of the polishing fluid. Due to the high rotation of the upper grinding disc 200, the temperature of the polishing fluid at the lens plate 410 is prone to rise. To ensure the polishing effect, the polishing fluid at the lens plate 410 needs to be replaced. Because there is a flow gap 112 between two adjacent mounting slots 111, the polishing fluid can flow directly into or out through the flow gap 112 to replace the polishing fluid in the central area of ​​the mounting surface 110, thereby replacing the polishing fluid at the lens plate 410, reducing the temperature of the polishing fluid, and avoiding adverse effects on the polishing effect of the lens plate 410.

[0031] In some embodiments of this application, the long sides of the mounting groove 111 in its width direction are defined as a first long side 111a and a second long side 111b, wherein the first long side 111a is located close to the axis of the polishing table 100, and the second long side 111b is located away from the axis of the polishing table 100. The short sides of the mounting groove 111 in its length direction are defined as a first short side 111c and a second short side 111d, wherein the first short side 111c is located close to the axis of the polishing table 100, and the second short side 111d is located away from the axis of the polishing table 100. Furthermore, the angle between the first long side 111a of any mounting groove 111 and the first short side 111c of the adjacent mounting groove 111 is equal to 30 degrees, such that the corners of the mounting groove 111 containing the first short side 111c and the first long side 111a are closer to the axis of the polishing table 100.

[0032] The polishing table 100, with this layout, is adapted to the mobile phone back panel 400, where the lens plate 410 is located at one corner of the back panel 400. (See reference for details.) Figure 7 As shown, the phone back panel 400 is generally rectangular, with the lens plate 410 located at one corner of the phone back panel 400. When polishing the phone back panel 400 with this structure, the corner of the phone back panel 400 where the lens plate 410 is located is closer to the axis of the polishing table 100, thereby reducing the area of ​​the circumscribed circles corresponding to multiple lens plates 410. This allows the lens plates 410 to be further concentrated, ensuring that the contact effect between multiple lens plates 410 and the upper polishing disc 200 and the polishing fluid is as uniform as possible.

[0033] Corresponding to the mounting slot 111, the first region is located at the corner area where the first long side 111a and the first short side 111c connect, meaning the first long side 111a and the first short side 111c are closer to the first region. The second long side 111b is farther away from the first region relative to the first long side 111a, and the second short side 111d is farther away from the first region relative to the first short side 111c. After the phone backplate 400 is placed in the mounting slot 111, the lens plate 410 is closer to the axis of the polishing table 100 relative to other areas of the phone backplate 400.

[0034] In some embodiments, the connection point between the first long side I11a and the first short side 111c is closest to the axis of the polishing table 100, as can be referred to... Figure 2 As shown. The first area is set closely around the axis of the polishing table 100. When polishing the phone back panel 400, the phone back panel 400 is placed in the mounting groove 111, as can be seen from the diagram. Figure 5 As shown, the lens plate 410 corresponding to the first region is arranged closely around the axis of the polishing table 100.

[0035] In other embodiments, the first long side 111a or the first short side 111c of the mounting groove 111 is closer to the axis of the polishing stage 100. (See reference...) Figure 3 As shown, the long side of the mounting groove 111 is closer to the axis of the polishing table 100, and the connection between the first long side 111a and the first short side 111c of any mounting groove 111 is located close to the first long side 111a of the adjacent mounting groove 111. With this arrangement, the area of ​​the circumscribed circle corresponding to the three lens plates 410 is smaller, and the extension directions of the flow gaps 112 between adjacent mounting grooves 111 intersect to form a triangle. Since the extension directions of the three flow gaps 112 can intersect to form a triangle, the flowability of the polishing fluid located at the center of the three lens plates 410 is enhanced, making it easier to replace this portion of the polishing fluid and ensuring that the polishing fluid around the lens plates 410 remains at a suitable temperature. Furthermore, impurities generated during polishing can be quickly discharged, preventing the accumulation of impurities from affecting the polishing effect of the lens plates 410. When polishing the mobile phone back panel 400, the mobile phone back panel 400 is placed in the mounting groove 111, as can be referred to... Figure 6 As shown, the lens plate 410 corresponding to the first region is arranged closely around the axis of the polishing table 100.

[0036] In other embodiments, see reference Figure 4 As shown, the short side of the mounting groove 111 is closer to the axis of the polishing table 100, and the connection part of the first long side 111a and the first short side 111c of any mounting groove 111 is set close to the first short side 111c of the adjacent mounting groove 111.

[0037] To enhance the flowability of the polishing slurry on the mounting surface 110, at least one guide channel 113 is provided on the mounting surface 110. The extension path of the guide channel 113 is arc-shaped. The inlet 113a of the guide channel 113 is close to the periphery of the polishing table 100, receiving the polishing slurry introduced into the mounting surface 110 from the periphery of the polishing table 100. The outlet 113b of the guide channel 113 is located close to the axis of the polishing table 100, aiming to guide the polishing slurry into the first area. During the polishing process of the lens plate 410, the polishing table 100 rotates around its axis under the drive of an external mechanism. Along the rotation direction of the polishing table 100, the center of the extension path of the guide channel 113 is located in front of the guide channel 113. Figure 3 As shown. The extension path of the guide groove 113 is an arc-shaped structure, which can be an elliptical arc or a circular arc.

[0038] The direction of rotation of the polishing table 100 is Figure 3 As indicated by the arrow, during the rotation of the polishing table 100, the polishing liquid entering the inlet 113a of the guide channel 113 comes into contact with the side wall of the guide channel 113. (Refer to...) Figure 3 As shown, the direction of the dashed line indicates the flow direction of the polishing fluid in the guide channel 113. After being touched by the side wall of the guide channel 113, the polishing fluid gradually approaches the outlet 113b of the guide channel 113, i.e., the area where the lens plate 410 is located. This allows the polishing fluid to flow quickly to the area where the lens plate 410 is located as the polishing table 100 rotates, accelerating the replacement of the polishing fluid in the area where the lens plate 410 is located and improving the polishing effect of the lens plate 410.

[0039] The outlet 113b of the guide channel 113 is located between two adjacent mounting slots 111, and the outlet 113b faces the axis of the polishing table 100. The polishing fluid flowing from the outlet 113b of the guide channel 113, no longer restricted by the guide channel 113, tends to diffuse forward. Because the outlet 113b faces the axis of the polishing table 100, some of the polishing fluid will move along the axis of the polishing table 100, eventually reaching the area where the lens plate 410 is located.

[0040] Along the radial direction of the polishing table 100, the outlet 113b of the guide channel 113 is located on the side of the first region away from the axis of the polishing table 100. After a portion of the polishing fluid flows out from the outlet 113b of the guide channel 113, the first regions of the three guide channels 113 are all located on the flow path of that portion of the polishing fluid, thereby improving the fluidity of the polishing fluid in the region where the lens plate 410 is located.

[0041] Corresponding to the mounting groove 111, there are also three guide grooves 113. The three guide grooves 113 are rotationally symmetrical about the axis of the polishing table 100, and the three guide grooves 113 and the three mounting grooves 111 are arranged at intervals along the circumference of the polishing table 100. This improves the uniformity of the polishing fluid distribution, thereby ensuring that the contact effect between the three lens plates 410 and the polishing fluid is as similar as possible.

[0042] In some embodiments of this application, the central angle of the guide groove 113 is 180 degrees, which increases the flow rate of the polishing fluid.

[0043] This application also provides a polishing system for polishing a mobile phone lens plate 410, including an upper grinding disc 200, a polishing fluid delivery pipe 300, and a polishing table 100 provided in any of the above embodiments; the mounting surface 110 of the polishing table 100 and the upper grinding disc 200 are arranged face to face, and the outlet surface of the polishing fluid delivery pipe 300 is arranged towards the gap between the polishing table 100 and the upper grinding disc 200, as can be seen from... Figure 8 As shown.

[0044] Driven by a power mechanism, the upper grinding disc 200 rotates to polish the lens plate 410 placed on the polishing table 100. The polishing slurry delivery pipe 300 is located at the periphery of the polishing table 100. Compared to existing technologies, this does not occupy the polishing surface of the upper grinding disc 200, ensuring uniform contact between each area of ​​the upper grinding disc 200 and the lens plate 410, guaranteeing consistent contact between each lens plate 410 and the upper grinding disc 200. The polishing slurry delivery pipe 300 is aligned with the gap between the polishing table 100 and the upper grinding disc 200, guiding the polishing slurry onto the mounting surface 110. During use, the polishing table 100 rotates under the drive of the power mechanism, but the polishing slurry delivery pipe 300 does not rotate. The rotation of the polishing table 100 theoretically ensures uniform contact between each lens plate 410 and the polishing slurry, reducing variations in polishing effect caused by differences in the polishing slurry.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A polishing table for polishing mobile phone lens plates, characterized in that, One axial surface of the polishing table (100) is a mounting surface (110), which is used to receive polishing liquid flowing in from the circumferential edge of the polishing table (100). The mounting surface (110) is also provided with three mounting slots (111). The three mounting slots (111) are rotationally symmetrical about the axis of the polishing table (100). The mounting slots (111) are used to mount the mobile phone back panel (400). The mounting slots (111) have a first region and a second region distributed along their length direction. The first region is located near the axis of the polishing table (100), and the second region is located near the periphery of the polishing table (100). The first region corresponds to the lens plate (410) at the top of the mobile phone back panel (400), and the second region corresponds to the bottom region of the mobile phone back panel (400). The long side of the mounting groove (111) in the width direction is a first long side (111a) and a second long side (111b). The first long side (111a) is located close to the axis of the polishing table (100), and the second long side (111b) is located away from the axis of the polishing table (100). The shorter sides of the mounting groove (111) along its length are a first short side (111c) and a second short side (111d). The first short side (111c) is located close to the axis of the polishing table (100), and the second short side (111d) is located away from the axis of the polishing table (100). The angle between the first long side (111a) of any of the mounting slots (111) and the first short side (111c) of the adjacent mounting slot (111) is equal to 30 degrees; The connection portion of the first long side (111a) and the first short side (111c) of any of the mounting slots (111) is located close to the first long side (111a) or the first short side (111c) of the adjacent mounting slot (111).

2. The polishing table for polishing mobile phone lens plates according to claim 1, characterized in that, There is a flow gap (112) between two adjacent mounting slots (111), which is used for the flow of the polishing fluid.

3. A polishing table for polishing mobile phone lens plates according to claim 1, characterized in that, The mounting surface (110) is also provided with at least one guide groove (113), the extension path of the guide groove (113) is arc-shaped, the inlet (113a) of the guide groove (113) is close to the periphery of the polishing table (100), and the outlet (113b) of the guide groove (113) is located close to the axis of the polishing table (100). The polishing table (100) can rotate around its axis under the drive of an external mechanism. Along the rotation direction of the polishing table (100), the center of the circle corresponding to the extension path of the guide groove (113) is in front of the guide groove (113).

4. A polishing table for polishing mobile phone lens plates according to claim 3, characterized in that, The outlet (113b) of the guide groove (113) is located between two adjacent mounting grooves (111), and the outlet (113b) is arranged facing the axis of the polishing table (100).

5. A polishing table for polishing mobile phone lens plates according to claim 3, characterized in that, There are three flow guide grooves (113), which are rotationally symmetrical about the axis of the polishing table (100). The three flow guide grooves (113) and the three mounting grooves (111) are arranged at intervals along the circumference of the polishing table (100).

6. A polishing table for polishing mobile phone lens plates according to claim 3, characterized in that, The central angle corresponding to the flow guide groove (113) is 180 degrees.

7. A polishing table for polishing mobile phone lens plates according to claim 3, characterized in that, Along the radial direction of the polishing table (100), the outlet (113b) of the guide groove (113) is located on the side of the first region away from the axis of the polishing table (100).

8. A polishing system for polishing mobile phone lens plates, characterized in that, It includes an upper grinding disc (200), a polishing fluid delivery pipe (300), and a polishing table (100) as described in any one of claims 1-7. The mounting surface (110) of the polishing table (100) and the upper grinding disc (200) are arranged face to face, and the outlet surface of the polishing liquid delivery pipe (300) is arranged towards the gap between the polishing table (100) and the upper grinding disc (200).

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