A combined fixture and a polishing method applied to sapphire polishing

Abstract

A combination jig and a polishing method for sapphire polishing, the combination jig comprising a cover plate, a base and a tool tray, the base being provided with a plurality of base acupoint cavities for placing sapphire products with concave surfaces facing upward, the cover plate being provided with a plurality of cover plate acupoint holes, the radial dimension of the cover plate acupoint holes being smaller than the radial dimension of the base acupoint cavities by a flange plane width, a top post hole being provided through the bottom of the base acupoint cavity, and the tool tray being provided with a plurality of top posts corresponding to the top post holes, the present invention can utilize the cover plate to simultaneously cover the non-polishing parts of batches of sapphire products on the base, the entire jig is simple and not too small, not only has a long service life, but also can fill the jig with sapphire products at one time, avoiding clamping one by one and improving clamping efficiency; after the sapphire polishing is completed, the cover plate is removed, and all sapphire products in the combination jig can be taken out at one time using the tool tray, avoiding taking out the sapphires and products one by one, achieving extremely high efficiency and saving a lot of manpower.

Description

Technical Field

[0001] The present invention relates to the field of sapphire processing, and in particular to a combined jig and a polishing method for sapphire polishing. Background Art

[0002] Sapphire is a widely used inorganic, non-metallic material with advantages such as high hardness, high melting point, excellent insulation, and good chemical stability. Therefore, it is widely used in various fields, especially in optics. Because optical devices have high requirements for sapphire surface smoothness, roughness, and processing precision, the vast majority of sapphire products require polishing to achieve a smooth, finely roughened, and defect-free surface. Since most sapphire products are small in size and complex in structure, with numerous concave and convex surfaces, chamfers, and rounded corners, the polishing process often requires separate polishing of different areas, meaning some areas require polishing while others do not. When polishing one area, it is necessary to protect other areas from deformation caused by polishing. This necessitates the addition of a shielding area to the polishing fixture to protect the non-polished areas. Existing sapphire polishing jigs usually add small protective mesos to individual sapphire products to cover the non-polished parts of the sapphire to prevent deformation caused by being thrown during polishing. This will reduce the clamping efficiency of the sapphire products. When clamping sapphire products, it is necessary to install one sapphire product and one mesos. After polishing, it is necessary to remove the mesos on each sapphire product one by one, and then remove the sapphire products. Both clamping and unclamping efficiency are very low, requiring a lot of manpower. At the same time, the protective mesos are complex in structure, small in size, and have a short lifespan. Generally, 1-2 molds need to be replaced. At the same time, the processing cost is high. The above factors have resulted in low efficiency, high manpower and material costs, and low economic benefits in the existing sapphire polishing. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a high-efficiency, long-life, low-cost combined fixture and polishing method for sapphire polishing in view of the above-mentioned defects of low polishing efficiency, short meson life and high polishing cost in the prior art.

[0004] The technical solution adopted by the present invention to solve its technical problem is:

[0005] On the one hand, a combined jig for sapphire polishing is constructed for processing the concave surface of a sapphire product, wherein the edge of the concave surface of the sapphire product is a flange plane. The combined jig includes a cover plate, a base, and a tool tray. The base is provided with a plurality of base acupoint cavities for placing sapphire products with the concave surface facing upward. The bottom of the base acupoint cavities is provided with a top post hole. The tool tray is provided with a plurality of top posts corresponding to the respective top post holes. The cover plate is provided with a plurality of cover plate acupoint holes corresponding to the plurality of base acupoint cavities on the base.

[0006] The base acupuncture point cavity is used to place a sapphire product with the concave surface facing upwards. The cover plate is placed on the base. The cover plate acupuncture point holes are located above the corresponding base acupuncture point cavities. The radial dimension of the cover plate acupuncture point holes is smaller than the radial dimension of the base acupuncture point cavity by the width of a flange plane, thereby covering and protecting the flange plane from polishing and exposing only other parts of the concave surface of the sapphire product that need to be polished.

[0007] When the base is placed on the tool tray, each of the ejector pins is pushed into its corresponding ejector pin hole, thereby ejecting the sapphire product on the base at one time.

[0008] Furthermore, in the combined jig for sapphire polishing of the present invention, the cover plate acupoint hole comprises a cover plate acupoint hole cavity and a cover plate acupoint hole covering sheet;

[0009] The cover plate acupuncture point hole cavity is through-through, and the radial dimension of the cover plate acupuncture point cavity is equivalent to that of the base acupuncture point cavity, and is used to fix the sapphire product in the radial direction like the base acupuncture point cavity;

[0010] The cover plate acupoint hole covering piece is an annular flange extending radially from the top edge of the cover plate acupoint hole cavity. The shape and size of the annular flange are consistent with the flange plane to cover the flange plane so that it is not polished; the cover plate acupoint hole covering piece encloses the cover plate acupoint hole through hole to expose other parts of the concave surface of the sapphire product that need to be polished.

[0011] Furthermore, in the combined jig for sapphire polishing described in the present invention, the base acupuncture point cavity is a cylindrical groove with an open top, and the top column hole is opened up and down through the bottom center of the cylindrical groove, and the radial dimension of the top column hole is smaller than the radial dimension of the cylindrical groove.

[0012] Furthermore, in the combined jig for sapphire polishing described in the present invention, the cover plate, base and tool disk are all roughly disc-shaped, a plurality of the base acupoint cavities are centrally symmetrically distributed around the center of the base, a plurality of the cover plate acupoint holes are centrally symmetrically distributed around the center of the cover plate, and a plurality of the top columns are centrally symmetrically distributed around the center of the tool disk.

[0013] Furthermore, in the combination jig for sapphire polishing described in the present invention, a plurality of first positioning holes for positioning the cover plate and the base and for taking and placing the cover plate are provided on the cover plate, and a plurality of second positioning holes corresponding to the plurality of first positioning holes are provided on the base. When the cover plate is placed on the base, the first positioning holes and the second positioning holes are aligned to achieve vertical assembly.

[0014] Furthermore, in the combined jig for sapphire polishing described in the present invention, a plurality of positioning posts corresponding to the plurality of second positioning holes protrude from the tool disk, and when the base is placed on the tool disk, the positioning posts are passed through the second positioning holes to achieve vertical assembly.

[0015] Furthermore, in the combination jig for sapphire polishing described in the present invention, multiple first positioning holes are distributed around the center of the cover plate outside the circumscribed circles of multiple cover plate acupoint holes, multiple second positioning holes are distributed around the center of the base outside the circumscribed circles of multiple base acupoint cavities, and multiple positioning columns are distributed around the center of the tool tray outside the circumscribed circles of multiple top columns.

[0016] Furthermore, in the combined jig for sapphire polishing described in the present invention, the height of the positioning column is higher than the height of the top column.

[0017] In a second aspect, a polishing method based on the combined jig for sapphire polishing is constructed, the method comprising:

[0018] Place a plurality of sapphire products into the plurality of base acupuncture point cavities of the base with the concave surfaces facing upwards;

[0019] Cover the base with the cover plate so that the cover plate acupuncture holes are located above the corresponding base acupuncture cavities, and the cover plate acupuncture holes cover the flange plane and only expose other parts of the concave surface of the sapphire product that need to be polished;

[0020] Placing the base and the cover together on a polishing machine, starting the machine to polish the sapphire product, and removing the base and the cover together from the machine after polishing is completed;

[0021] Remove the cover plate, place the base with the sapphire product on the tool tray, and push each of the push pins into its corresponding push pin hole and push it onto the convex surface of the sapphire product, thereby ejecting the sapphire product on the base at one time.

[0022] Furthermore, in the method of the present invention, a plurality of first positioning holes are defined on the cover plate, a plurality of second positioning holes corresponding to the plurality of first positioning holes are defined on the base, a plurality of positioning posts corresponding to the plurality of second positioning holes are protruded from the tool tray, and the height of the positioning posts is higher than the height of the top post. The method further comprises:

[0023] When the cover plate is placed on the base, the first positioning hole and the second positioning hole are aligned vertically;

[0024] When removing the cover plate, grab and remove the cover plate through the first positioning hole;

[0025] When placing the base on the tool tray, align the second positioning holes and the positioning posts up and down, and then lower the base after the positioning posts pass through the second positioning holes, and each of the push posts is pushed into its corresponding push post hole.

[0026] The combined jig and polishing method for sapphire polishing of the present invention have the following beneficial effects: there is no need to use a single meson to protect the non-polished part of the sapphire product, but a cover plate is used in combination with the base, because the radial dimension of the cover plate acupuncture hole is smaller than the radial dimension of the base acupuncture cavity by the width of a flange plane, so the cover plate can be used to cover the non-polished parts of the batch of sapphire products on the base at the same time, the entire jig is simple and the individual units are not too small, not only has a long service life and can be used continuously for 10-15 molds, but the jig can be filled with sapphire products at one time, avoiding clamping one by one, thereby improving clamping efficiency; after the sapphire polishing is completed, the cover plate is removed and all sapphire products in the combined jig can be taken out at one time using a tool tray, avoiding taking out mesons and products one by one, which is convenient, fast, highly efficient, and saves a lot of manpower; at the same time, the combined jig has a simple structure and few components, can be processed using a CNC machine and an injection molding method, is easy to maintain, and saves a lot of material costs; in short, the combined jig of the present invention has high efficiency in polishing sapphire products, long service life, is easy to process and maintain, can save a lot of manpower and material resources, and is conducive to improving economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only embodiments of the present invention. Those skilled in the art can also derive other drawings based on the provided drawings without inventive work.

[0028] Figure 1 It is a structural diagram of sapphire products;

[0029] Figure 2 It is a structural diagram of the base;

[0030] Figure 3 It is a structural diagram of the cover;

[0031] Figure 4 It is a top view of the acupuncture point hole of the cover plate;

[0032] Figure 5 is a cross-sectional view of the acupuncture point hole of the cover plate;

[0033] Figure 6 It is a structural diagram of the cover and the base combined;

[0034] Figure 7It is a schematic diagram of the structure of the tool tray;

[0035] Figure 8 It is a schematic diagram of the structure after the base and tool tray are assembled;

[0036] Figure 9 It is a flow chart of the polishing method of the present invention. DETAILED DESCRIPTION

[0037] To facilitate understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. Typical embodiments of the present invention are shown in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive. It should be understood that the embodiments of the present invention and the specific features in the embodiments are detailed descriptions of the technical solutions of the present application, rather than limitations of the technical solutions of the present application. In the absence of conflict, the embodiments of the present invention and the technical features in the embodiments can be combined with each other.

[0038] Example 1

[0039] refer to Figure 1 The sapphire product includes a concave surface and a convex surface. The concave surface includes a central plane 403 at the center, a flange plane 401 at the edge, and an annular arc surface 402 connecting the central plane 403 and the flange plane 401. The convex surface includes an arc convex surface 405 and a chamfer 404 at the edge of the arc convex surface 405. The present invention is mainly used to process the central plane 403 and the annular arc surface 402 of the concave surface of the sapphire product.

[0040] refer to Figure 2-8 The combined jig for sapphire polishing of this embodiment includes a cover plate 1, a base 2 and a tool tray 3.

[0041] refer to Figure 2 , the base 2 is roughly disc-shaped. A plurality of base acupoint cavities 22 for placing concave sapphire products are provided on the base 2, and the sapphire products are placed in the base acupoint cavities 22 with the concave surface facing upward. The plurality of base acupoint cavities 22 are centrally symmetrically distributed around the center of the base 2, and a top column hole 23 is provided through the bottom of each base acupoint cavity 22. Specifically, all the base acupoint cavities 22 are centrally symmetrically distributed in a circular manner around the center of the base 2. In this embodiment, the base 2 provides a total of 7 base acupoint cavities 22. In other embodiments, the base acupoint cavities 22 can also be other numbers. The base acupoint cavity 22 is a cylindrical groove with an open top, and the top column hole 23 is a cylindrical hole. The cylindrical hole is provided through the bottom center of the cylindrical groove, and the radial dimension of the top column hole 23 is smaller than the radial dimension of the cylindrical groove.

[0042] refer to Figure 3-5 The cover plate 1 is also roughly disc-shaped. The radial dimension of the cover plate 1 is roughly equivalent to that of the base 2. The thickness of the cover plate 1 is much smaller than that of the base 2. The cover plate 1 is used to cover the base 2 during polishing. The cover plate 1 is provided with a plurality of cover plate acupoint holes 12 corresponding to the plurality of base acupoint cavities 22 on the base 2. The plurality of cover plate acupoint holes 12 are distributed in a centrally symmetrical circular pattern around the center of the cover plate 1. Since there are a total of 7 base acupoint cavities 22, the number of cover plate acupoint holes 12 is also 7 accordingly. If the number of base acupoint cavities 22 changes, the number of cover plate acupoint holes 12 also needs to be adjusted accordingly.

[0043] When the cover plate 1 is covered on the base 2, the cover plate acupoint hole 12 is located above the corresponding base acupoint cavity 22. The radial dimension of the cover plate acupoint hole 12 is smaller than the radial dimension of the base acupoint cavity 22 by the width of a flange plane 401, thereby covering and protecting the flange plane 401 from being polished and only exposing other parts of the concave surface of the sapphire product that need to be polished.

[0044] Specifically, refer to Figure 4-5 The cover plate acupuncture hole 12 includes a cover plate acupuncture hole cavity 122 and a cover plate acupuncture hole cover 123. The cover plate acupuncture hole cavity 122 is a cylindrical through-hole extending vertically through the thickness of the cover plate 1. The radial dimension of the cover plate acupuncture hole cavity 122 is comparable to that of the base acupuncture hole cavity 22. Similar to the base acupuncture hole cavity 22, it is used to secure the sapphire product in the radial direction to prevent it from shaking during processing.

[0045] The cover plate acupuncture hole covering piece 123 is an annular flange extending radially from the top edge of the cover plate acupuncture hole cavity 122. The shape and size of the annular flange are consistent with the flange plane 401 to cover the flange plane 401 so that it is not polished. The cover plate acupuncture hole covering piece 123 encloses the cover plate acupuncture hole through hole 121 to expose other parts of the concave surface of the sapphire product that need to be polished, specifically Figure 1 The central plane 403 and the annular arc surface 402 of the sapphire product are shown in FIG. As a result, the sapphire product is simultaneously restricted in the radial direction by the cylindrical sidewalls of the base cavity 22 and the cylindrical sidewalls of the cover cavity 122, and is vertically restricted by the bottom wall of the base cavity 22 and the cover cover 123.

[0046] Combine Figure 2 、 3The cover plate 1 is provided with a plurality of first positioning holes 11 for positioning the cover plate 1 and the base 2 and for removing and placing the cover plate 1. Specifically, there are three first positioning holes 11. The three first positioning holes 11 are distributed in an equilateral triangle around the center of the cover plate 1 and outside the circumscribed circle of the plurality of cover plate acupuncture holes 12. The base 2 is provided with a plurality of second positioning holes 21 corresponding to the plurality of first positioning holes 11. When the cover plate 1 is placed on the base 2, the first positioning holes 11 and the second positioning holes 21 are aligned to achieve vertical alignment. Specifically, there are three second positioning holes 21. The three second positioning holes 21 are distributed in an equilateral triangle around the center of the base 2 and outside the circumscribed circle of the plurality of base acupuncture cavities 22.

[0047] refer to Figure 6 During polishing, multiple sapphire products 4 are placed with the concave surface facing upward into the multiple base acupoint cavities 22 of the base 2; then the cover plate 1 is covered on the base 2 and the angle of the cover plate 1 is adjusted to align the first positioning hole 11 and the second positioning hole 21, so that the cover plate acupoint hole cavity 122 is located above the corresponding base acupoint cavity 22, the cover plate acupoint hole covering piece 123 covers the flange plane 401, and the cover plate acupoint hole through hole 121 exposes the central plane 403 and the annular arc surface 402 of the concave surface of the sapphire product that need to be polished; then, the base 2 and the cover plate 1 are placed together on the polishing machine, and the machine is started to polish the sapphire product. In this way, this embodiment does not need to use a single meson to protect the non-polished parts of the sapphire product. The cover plate 1 can be used to cover the non-polished parts of the batch of sapphire products on the base 2 at the same time. The entire fixture is simple and the individual units are not too small. Not only does it have a long life and can be used continuously for 10-15 molds, but the sapphire products can be filled into the fixture at one time, avoiding clamping one by one, thereby improving the clamping efficiency.

[0048] refer to Figure 7 The tool tray 3 is mainly used to unload all sapphire products at one time. It is also roughly disc-shaped, with radial dimensions roughly equivalent to those of the base 2. The tool tray 3 is provided with a plurality of push pins 32 corresponding to the push pin holes 23. The dimensions of the push pins 32 match the push pin holes 23. The plurality of push pins 32 are distributed in a centrally symmetrical circle around the center of the tool tray 3. When the base 2 is separated from the cover plate 1 and placed on the tool tray 3, each push pin 32 pushes into its corresponding push pin hole 23, thereby ejecting the sapphire products on the base 2 at one time. Because there are a total of 7 base acupuncture point cavities 22, that is, the number of push pin holes 23 is 7, the number of push pins 32 is also 7 accordingly. If the number of base acupuncture point cavities 22 changes, the number of push pins 32 also needs to be adjusted accordingly.

[0049] Combine Figure 6 、 8After the sapphire product is polished, it can be Figure 6 The base 2 and cover plate 1 are removed from the machine together. The cover plate 1 is then removed by grasping through the first positioning hole 11. The base 2 containing the sapphire product is placed on the tool tray 3. The ejector pins 32 on the tool tray 3 are forced into their corresponding ejector pin holes 23 and into the convex surface of the sapphire product, thereby ejecting the sapphire product from the base 2 all at once. In this way, the tool tray 3 can be used to remove all sapphire products from the assembly jig at once, avoiding the need to remove the sapphire products one by one. This is quick and convenient, highly efficient, and saves a lot of manpower.

[0050] Preferably, the tool tray 3 is provided with a plurality of positioning posts 31 corresponding to the plurality of second positioning holes 21. When the base 2 is placed on the tool tray 3, the positioning posts 31 are used to pass through the second positioning holes 21 to achieve vertical assembly. Specifically, there are three positioning posts 31, and the three positioning posts 31 are distributed in the form of a right triangle around the center of the tool tray 3 on the outside of the circumscribed circle of the plurality of top posts 32.

[0051] The height of the positioning column 31 is higher than that of the top column 32 , so that the positioning column 31 can be inserted into the second positioning hole 21 before the top column 32 is inserted into the top column hole 23 .

[0052] In summary, this embodiment has the following beneficial effects: there is no need to use a single meson to protect the non-polished part of the sapphire product, but the cover plate is used in conjunction with the base, because the radial dimension of the cover plate acupoint hole is smaller than the radial dimension of the base acupoint cavity by the width of a flange plane, so the cover plate can be used to cover the non-polished parts of the batch of sapphire products on the base at the same time, the entire fixture is simple and the individual units are not too small, not only has a long life, can be used continuously for 10-15 molds, and the sapphire products can be filled into the fixture at one time, avoiding clamping one by one, thereby improving the clamping efficiency; after the sapphire polishing is completed, the cover plate is removed, and the tool tray can be used to take out all the sapphire products in the combined fixture at one time, avoiding taking out mesons and products one by one, which is convenient and fast, extremely efficient, and saves a lot of manpower; at the same time, the combined fixture has a simple structure, few components, can be processed using a CNC machine and injection molding method, is easy to maintain, and saves a lot of material costs; in short, the combined fixture of the present invention has high efficiency in polishing sapphire products, long life, is easy to process and maintain, can save a lot of manpower and material resources, and is conducive to improving economic benefits.

[0053] Example 2

[0054] refer to Figure 2 Based on the same inventive concept, the present invention discloses a polishing method based on the combined fixture described in Example 1, the method comprising:

[0055] S101: placing a plurality of sapphire products with the concave surfaces facing upward into the plurality of base acupuncture point cavities 22 of the base 2;

[0056] S102: Cover the cover plate 1 on the base 2 by aligning the first positioning hole 11 and the second positioning hole 21 up and down. The cover plate acupoint holes 12 are located above the corresponding base acupoint cavities 22. The cover plate acupoint holes 12 cover the flange plane 401 and only expose other parts of the concave surface of the sapphire product that need to be polished.

[0057] S103: placing the base 2 and the cover plate 1 together on a polishing machine, starting the machine to polish the sapphire product, and after polishing is completed, removing the base 2 and the cover plate 1 together from the machine;

[0058] S104: Grab and remove the cover plate 1 through the first positioning hole 11, align the second positioning hole 21 and the positioning column 31 up and down, and after the positioning column 31 passes through the second positioning hole 21, place the base 2 containing the sapphire product on the tool tray 3, and each of the push columns 32 is pushed into the corresponding push column hole 23 to push against the convex surface of the sapphire product, thereby ejecting the sapphire product on the base 2 at one time.

[0059] For more details, please refer to Example 1, which will not be repeated here.

[0060] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly attached to the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," and similar expressions used herein are for illustrative purposes only.

[0061] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in this specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0062] Terms containing ordinal numbers, such as "first" and "second," used in this specification may be used to describe various components, but these components are not limited by these terms. These terms are used solely to distinguish one component from another. For example, a first component may be named a second component, and similarly, a second component may be named a first component, without departing from the scope of the present invention.

[0063] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, all of which are protected by the present invention.

Claims

1. A combined jig for sapphire polishing, used for processing the concave surface of a sapphire product, wherein the edge of the concave surface of the sapphire product is a flange plane (401), characterized in that: The combined fixture comprises a cover plate (1), a base (2) and a tool tray (3); a plurality of base acupoint cavities (22) are provided on the base (2); a top post hole (23) is provided through the bottom of the base acupoint cavity (22); a plurality of top posts (32) corresponding to each top post hole (23) are provided on the tool tray (3); and a plurality of cover plate acupoint holes (12) corresponding to the plurality of base acupoint cavities (22) on the base (2) are provided on the cover plate (1); The base acupuncture point cavity (22) is used to place a sapphire product with the concave surface facing upwards, the cover plate (1) is covered on the base (2), the cover plate acupuncture point hole (12) is located above the corresponding base acupuncture point cavity (22), and the radial dimension of the cover plate acupuncture point hole (12) is smaller than the radial dimension of the base acupuncture point cavity (22) by the width of a flange plane (401), thereby covering and protecting the flange plane (401) from being polished and only exposing other parts of the concave surface of the sapphire product that need to be polished; When the base (2) is placed on the tool tray (3), each of the push pins (32) pushes into the corresponding push pin hole (23) to eject the sapphire product on the base (2) at one time; the cover plate acupuncture point hole (12) includes a cover plate acupuncture point hole cavity (122) and a cover plate acupuncture point hole covering sheet (123); The cover plate acupuncture point hole cavity (122) is through-connected from top to bottom, and the radial dimension of the cover plate acupuncture point hole cavity (122) is equivalent to that of the base acupuncture point cavity (22), and is used to fix the sapphire product in the radial direction in the same manner as the base acupuncture point cavity (22); The cover plate acupuncture hole covering piece (123) is an annular flange extending from the top edge of the cover plate acupuncture hole cavity (122) in the radial direction, and the shape and size of the annular flange are consistent with the flange plane (401) to cover the flange plane (401) so that it is not polished; the cover plate acupuncture hole covering piece (123) encloses the cover plate acupuncture hole through hole (121) to expose other parts of the concave surface of the sapphire product that need to be polished; the base acupuncture hole cavity (22) is a cylindrical groove with an open top, and the top The column hole (23) is opened in the bottom center of the cylindrical groove in an upward and downward manner, and the radial dimension of the top column hole (23) is smaller than the radial dimension of the cylindrical groove; the cover plate (1), the base (2) and the tool disk (3) are all disc-shaped, and the plurality of base acupuncture cavities (22) are centrally symmetrically distributed around the center of the base (2), the plurality of cover plate acupuncture holes (12) are centrally symmetrically distributed around the center of the cover plate (1), and the plurality of top columns (32) are centrally symmetrically distributed around the center of the tool disk (3).

2. The combined jig for sapphire polishing according to claim 1, characterized in that: The cover plate (1) is provided with a plurality of first positioning holes (11) for positioning the cover plate (1) and the base (2) and for taking and placing the cover plate (1); the base (2) is provided with a plurality of second positioning holes (21) corresponding to the plurality of first positioning holes (11); when the cover plate (1) is placed on the base (2), the first positioning holes (11) and the second positioning holes (21) are aligned to achieve vertical alignment and assembly.

3. The combined jig for sapphire polishing according to claim 2, characterized in that: A plurality of positioning columns (31) corresponding to the plurality of second positioning holes (21) protrude from the tool tray (3), and when the base (2) is placed on the tool tray (3), the positioning columns (31) are passed through the second positioning holes (21) to achieve vertical alignment assembly.

4. The combined jig for sapphire polishing according to claim 3, characterized in that: The plurality of first positioning holes (11) are distributed around the center of the cover plate (1) on the outside of the circumscribed circles of the plurality of cover plate acupuncture holes (12); the plurality of second positioning holes (21) are distributed around the center of the base (2) on the outside of the circumscribed circles of the plurality of base acupuncture cavities (22); and the plurality of positioning posts (31) are distributed around the center of the tool tray (3) on the outside of the circumscribed circles of the plurality of top posts (32).

5. The combined jig for sapphire polishing according to claim 4, characterized in that: The height of the positioning column (31) is higher than the height of the top column (32).

6. A polishing method for sapphire polishing using the combined jig according to any one of claims 1 to 5, characterized in that: The method comprises: Placing a plurality of sapphire products with the concave surfaces facing upwards into the plurality of base acupuncture point cavities (22) of the base (2); Covering the cover plate (1) on the base (2) and positioning the cover plate acupuncture point hole (12) above the corresponding base acupuncture point cavity (22), wherein the cover plate acupuncture point hole (12) covers the flange plane (401) and only exposes other parts of the concave surface of the sapphire product that need to be polished; Put the base (2) and the cover plate (1) together on a polishing machine, start the machine to polish the sapphire product, and after polishing is completed, remove the base (2) and the cover plate (1) from the machine together; The cover plate (1) is removed, and the base (2) containing the sapphire product is placed on the tool tray (3). Each of the push pins (32) is pushed into the corresponding push pin hole (23) and pushed against the convex surface of the sapphire product, thereby ejecting the sapphire product on the base (2) at one time.

7. The polishing method according to claim 6, characterized in that The cover plate (1) is provided with a plurality of first positioning holes (11), the base (2) is provided with a plurality of second positioning holes (21) corresponding to the plurality of first positioning holes (11), the tool tray (3) is provided with a plurality of positioning posts (31) corresponding to the plurality of second positioning holes (21), the height of the positioning posts (31) being higher than the height of the top posts (32), and the method further comprising: When the cover plate (1) is placed on the base (2), the first positioning hole (11) and the second positioning hole (21) are aligned vertically; When removing the cover plate (1), the cover plate (1) is grasped and removed through the first positioning hole (11); When the base (2) is placed on the tool tray (3), the second positioning hole (21) and the positioning column (31) are aligned vertically, and the base (2) is lowered after the positioning column (31) passes through the second positioning hole (21). Each of the top columns (32) is pushed into the corresponding top column hole (23).

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