A method for fine grinding of sapphire glass
By using bakelite and copper grinding heads to perform precision grinding on sapphire products, the problems of grinding head wear and low processing efficiency caused by the high hardness of sapphire have been solved, achieving a high-efficiency and low-cost precision processing effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- BIEL OPTIC HUIZHOU
- Filing Date
- 2021-12-27
- Publication Date
- 2026-07-10
AI Technical Summary
Sapphire has a high hardness, which limits the range of grinding powders available. While there are many types of grinding heads to choose from, the processing efficiency is low, the grinding heads wear out quickly, and the production cost is high. It is also difficult to effectively remove the damaged layers from the plateau and non-plateau areas of sapphire products.
Different grinding devices and media are used to perform precision grinding on sapphire products, including bakelite grinding heads and copper grinding heads, which are used to perform friction processing on the plateau and non-plateau parts respectively. Combined with the use of grinding powder, grinding fluid and oil supply pipes, the precision processing of sapphire products can be achieved.
It improves processing efficiency, reduces grinding head consumption, lowers production costs, and achieves surface roughness of Sa≤30nm and Sa≤50nm for both platform and non-platform parts, with a yield of 95%.
Smart Images
Figure CN116394073B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of grinding, and in particular to a method for fine grinding of sapphire glass. Background Technology
[0002] Sapphire has become one of the most widely used materials in electronic products in recent years. Its main applications fall into two categories: one is as a substrate material, primarily for LED substrates; the other is as a window material, such as for watch faces, mobile phone cover plates, aerospace, and precision instruments. However, its hardness, second only to diamond, makes it relatively difficult to process.
[0003] Sapphire processing technology is a hot research topic in the industry. Sapphire processing mainly includes cutting, fine grinding, sweeping, and polishing. The main working principle of fine grinding of sapphire is to remove the deeper damaging layers on the sapphire surface. This is achieved by using grinding powder to rub the grinding head against the sapphire, removing these damaging layers. The two main factors affecting the fine grinding effect of sapphire are the grinding head and the grinding powder.
[0004] Due to the high hardness of sapphire, the range of grinding powders available is limited, and diamond powder is typically used. However, there are various options for grinding heads, and the choice of grinding head material directly determines the processing effect on the sapphire. Sapphire products are generally small in size and complex in structure, resulting in low processing efficiency, high wear and tear on grinding heads, and a significant increase in production and processing costs.
[0005] Therefore, how to provide a fine grinding method for sapphire glass has become an urgent problem to be solved in this industry. Summary of the Invention
[0006] The purpose of this invention is to provide a fine grinding method for sapphire glass that can meet the processing requirements of sapphire glass products. It can process both the plateau and non-plateau parts of the product simultaneously, effectively improving production efficiency, reducing grinding head consumption and grinding head replacement time, greatly reducing production costs, and facilitating large-scale promotion.
[0007] To achieve the above objectives, the present invention provides a method for precision grinding of sapphire glass, comprising the following steps:
[0008] Step 1: Machine preparation. Place the grinding media into the part of the product to be processed, connect the grinding device A to the machine, use the support to support the grinding part of the grinding device A, connect the swing shaft to the grinding part, apply 1kg-2kg pressure, and start the equipment.
[0009] Step Two: The rotating shaft drives the grinding part of grinding device A to oscillate up, down, left, and right, causing the grinding part to contact and generate friction with the R-angle position of the non-platform part of the product. The grinding powder between the grinding part and the non-platform part grinds the product, and the processing time is 200-300 seconds. After processing, the R-angle roughness of the product reaches Sa≤50nm.
[0010] Step 3: Place the grinding media into the part of the product to be processed, connect the grinding device B to the machine, apply a pressure of 2kg-4kg, and start the equipment;
[0011] Step 4: Grinding device B rotates and swings left and right, so that the grinding part of grinding device B comes into contact with the platform part and non-platform part of the product and generates friction. The product is processed by grinding with grinding powder. The processing time is 200-300 seconds, which can remove the parts to be removed from the platform part and non-platform part of the product.
[0012] Step 5: Place the grinding fluid into the part of the product to be processed, connect the grinding device C to the machine, apply a pressure of 2.5kg-5kg, and start the equipment;
[0013] Step 6: The swing shaft drives the grinding device C to rotate and swing left and right, so that the grinding part of the grinding device C contacts the platform part of the product to generate friction. The product is ground using grinding fluid. The processing time is 80-120 seconds. After processing, the roughness of the platform part reaches Sa≤30nm.
[0014] Step 7: Insert the oil supply pipe into the oil supply hole of the grinding device D and turn on the oil supply. Connect the rotating shaft to the grinding part of the grinding device D, apply a pressure of 2.5kg-5kg, and start the equipment.
[0015] Step 8: The rotating shaft drives the grinding device D to rotate left and right, causing the grinding part of the grinding device D to contact the arc surface of the non-platform part of the product and generate friction. The grinding powder is dripped directly onto the arc surface of the non-platform part of the product through the oil supply pipe.
[0016] The processing time is 30-70 seconds, and the surface roughness Sa of the non-platform parts of the processed product is ≤50nm.
[0017] Step Nine: By completing steps one through eight, the sapphire glass is finally finished through fine grinding.
[0018] Furthermore, the grinding media in steps one and three include a mixture of grinding powder and oily media.
[0019] Furthermore, the grinding device A in step one is a bakelite grinding head.
[0020] Furthermore, the R-angle of the grinding section of the grinding device A in step one includes a horizontal side, a hypotenuse, and a vertical side parallel to the platform surface of the product, wherein the length of the hypotenuse is longer than the length of the vertical side.
[0021] Furthermore, the platform portion in step four refers to the concave platform of the product, and the non-platform portion includes the radius (R-angle) of the non-platform portion and the arc surface of the non-platform portion.
[0022] Furthermore, the grinding device B in steps three and four is a bakelite pen.
[0023] Furthermore, the grinding part of the grinding device C in step five is a flat-bottomed right-angled grinding head, and the material of the grinding head includes metallic copper.
[0024] Furthermore, the arc surface of the non-platform part in step eight is the arc surface area between the R-angle of the platform part and the non-platform part.
[0025] Furthermore, the grinding part of the grinding device D in step seven is a flat-bottomed grinding head with a radius (R), and the material of the grinding head includes metallic copper.
[0026] Furthermore, the R-angle of the grinding section of the grinding device D in step eight includes a horizontal side, a hypotenuse, and a vertical side parallel to the platform surface of the product, wherein the length of the hypotenuse is shorter than the length of the vertical side.
[0027] In summary, the precision grinding method for sapphire glass of this invention utilizes different grinding devices to process special structural parts of the product, such as the radius (R-angle), curved surfaces, and plateau areas. This results in a more refined contour and precise structure. In particular, the use of a copper grinding head to grind the plateau areas effectively removes the damaging layer, making the plateau surface smoother and achieving a surface roughness of Sa≤30nm. The use of a copper grinding head to process the curved surfaces of non-plateau areas successfully solves the problem of removing the damaging layer on the curved surfaces of sapphire glass products due to their small area, and the processing effect is excellent, with a general yield rate of 95%.
[0028] This invention can meet the processing needs of different products such as sapphire glass products, glass covers and crystals. It can effectively reduce the wear and tear of grinding heads and processing time during the processing. It can process sapphire products with special structures such as plateau parts and non-plateau parts, effectively improve production and processing efficiency, solve the roughness problem of sapphire glass products in the grinding process, greatly reduce production costs and achieve stable processing results with high yield. Attached Figure Description
[0029] Figure 1 This is a schematic diagram of a sapphire glass precision grinding method according to the present invention;
[0030] Figure 2 This is a schematic diagram of the product to be processed according to the precision grinding method of sapphire glass of the present invention.
[0031] Explanation of reference numerals in the attached figures:
[0032] 1. Grinding head shank, 2. Grinding head seat, 3. Base, 4. Radius of non-platform area, 5. Grinding part, 6. Arc surface of non-platform area, 7. Platform area. Detailed Implementation
[0033] To more clearly illustrate the structural features of the present invention and the technical effects achieved, a detailed description will be provided below in conjunction with preferred embodiments and accompanying drawings. Obviously, for those skilled in the art, extensions to the technical solution obtained based on these drawings without creative effort are still within the scope of protection of this application.
[0034] like Figure 1 and Figure 2 As shown, the present invention provides a method for precision grinding of sapphire glass, comprising the following steps:
[0035] Step 1: Machine preparation. Apply the mixture of grinding powder and oily medium as the grinding medium to the R-angle position of the non-platform part of the product to be ground using a brush. Connect the bakelite grinding head to the machine. The support is used to support the grinding part of the bakelite grinding head. The swing shaft is connected to the grinding part. Apply 1kg-2kg pressure and start the equipment.
[0036] Step 2: The rotating shaft drives the grinding part of the bakelite grinding head to swing up, down, left and right, so that the grinding part contacts the R-angle position of the non-platform part of the product and generates friction. The grinding powder between the grinding part and the non-platform part is used to grind the product. The processing time is 240 seconds. After processing, the R-angle roughness of the product reaches Sa≤50nm. The above R-angle includes the horizontal side, the inclined side and the vertical side parallel to the platform surface of the product. The length of the inclined side is longer than the length of the vertical side.
[0037] Step 3: Add the mixture of grinding powder and oily medium again as the grinding medium. Apply it with a brush to the flat parts and the R-angles and arc surfaces of the non-flat parts of the product to be ground. Connect the bakelite pen to the machine, apply 2kg-4kg pressure, and start the equipment.
[0038] Step 4: Rotate the bakelite pen left and right to make the grinding part of the bakelite pen contact the plateau and non-plateau parts of the product and generate friction. Use the grinding powder to grind the product. The processing time is 300 seconds, which can effectively remove the parts to be removed from the plateau and non-plateau parts of the product.
[0039] Step 5: Place the grinding fluid into the part of the product to be processed, connect the flat-bottomed right-angled copper grinding head to the machine base, apply a pressure of 2.5kg-5kg, and start the equipment;
[0040] Step Six: The swing shaft drives the copper grinding head to rotate left and right, so that the grinding part of the copper grinding head comes into contact with the platform part of the product to generate friction. The product is then ground using grinding fluid for 100 seconds. After processing, the roughness of the platform part reaches Sa≤30nm.
[0041] Step 7: Insert the oil supply pipe into the oil supply hole of the flat-bottomed copper grinding head with a radius (R) and turn on the oil supply. Connect the rotating shaft to the grinding part of the copper grinding head, apply a pressure of 2.5kg-5kg, and start the equipment. The radius (R) includes a horizontal side, a bevel side, and a vertical side that are parallel to the platform surface of the product. The length of the bevel side is shorter than the length of the vertical side.
[0042] Step 8: The rotating shaft drives the copper grinding head to rotate left and right, causing the grinding part of the copper grinding head to contact the curved surface of the non-platform part of the product and generate friction. The grinding powder is dripped directly onto the curved surface of the non-platform part of the product through the oil supply pipe.
[0043] The processing time is 50 seconds, and the surface roughness Sa of the non-platform part of the processed product is ≤50nm; the aforementioned non-platform part is the arc surface area between the R-angle of the platform part and the non-platform part.
[0044] The present invention provides a method for fine grinding of sapphire glass. In addition to sapphire, the above-mentioned products to be ground and the processing steps can also be fine grinding, polishing and other processes for products such as glass, crystal and ruby. The grinding part can be a grinding head made of metal materials such as copper, steel, and iron.
[0045] This invention discloses a precision grinding method for sapphire glass. By employing different grinding devices to process special structural parts of the product, such as the radius (R-angle), curved surfaces, and plateau areas, the method achieves a more refined contour and precise structure. In particular, the use of a copper grinding head on the plateau area effectively removes the damaging layer, resulting in a smoother and flatter surface with a roughness of Sa≤30nm. The use of a copper grinding head on the curved surfaces of non-plateau areas successfully solves the problem of removing the damaging layer from the curved surfaces of sapphire glass products due to their small area, achieving excellent processing results with a general yield rate of 95%.
[0046] This invention discloses a fine grinding method for sapphire glass, which can meet the processing needs of various products such as sapphire glass products, glass covers for ordinary electronic devices, and crystal. It can effectively reduce the wear and tear of grinding heads and the number of processing steps and time during the processing. It enables the processing of sapphire products with special structures such as plateau and non-plateau parts, effectively improves production efficiency, shortens the operation time for changing grinding heads, effectively overcomes the roughness problem of sapphire glass products during the grinding process, greatly reduces production costs, and provides stable processing results with a high production yield.
[0047] The above description represents the preferred embodiments of the present invention. It should be noted that although the present invention has only provided the above embodiments, it also provides many possible variations that do not require creative effort. Although it is still impossible to exhaustively list them all, those skilled in the art should be able to conceive of more specific embodiments after reading this specification and combining it with common knowledge. Such specific embodiments do not depart from the spirit of the claims of the present invention. Any equivalent substitutions or improvements and modifications of any kind should be regarded as embodiments included in the present invention and fall within the protection scope of the present invention.
Claims
1. A method for precision grinding of sapphire glass, characterized in that, Includes the following steps: Step 1: Machine preparation. Place the grinding media into the part of the product to be processed, connect the grinding device A to the machine, use the support to support the grinding part of the grinding device A, connect the swing shaft to the grinding part, apply 1kg-2kg pressure, and start the equipment. Step 2: The rotating shaft drives the grinding part of the grinding device A to swing up, down, left and right, so that the grinding part contacts the R-angle position of the non-platform part of the product and generates friction. The grinding powder between the grinding part and the non-platform part grinds the product. The processing time is 200-300 seconds. The R-angle roughness of the processed product reaches Sa≤50nm. Step 3: Place the grinding media into the part of the product to be processed, connect the grinding device B to the machine, apply a pressure of 2kg-4kg, and start the equipment; Step 4: Grinding device B rotates and swings left and right, so that the grinding part of grinding device B comes into contact with the platform part and non-platform part of the product and generates friction. The product is processed by grinding with grinding powder. The processing time is 200-300 seconds, which can remove the parts to be removed from the platform part and non-platform part of the product. Step 5: Place the grinding fluid into the part of the product to be processed, connect the grinding device C to the machine, apply a pressure of 2.5kg-5kg, and start the equipment; Step 6: The swing shaft drives the grinding device C to rotate and swing left and right, so that the grinding part of the grinding device C contacts the platform part of the product to generate friction. The product is ground using grinding fluid. The processing time is 80-120 seconds. After processing, the roughness of the platform part reaches Sa≤30nm. Step 7: Insert the oil supply pipe into the oil supply hole of the grinding device D and turn on the oil supply. Connect the rotating shaft to the grinding part of the grinding device D, apply a pressure of 2.5kg-5kg, and start the equipment. Step 8: The rotating shaft drives the grinding device D to rotate left and right, causing the grinding part of the grinding device D to contact the arc surface of the non-platform part of the product and generate friction. The grinding powder is dripped directly onto the arc surface of the non-platform part of the product through the oil supply pipe. The processing time is 30-70 seconds, and the surface roughness Sa of the non-platform parts of the processed product is ≤50nm. Step Nine: By completing steps one through eight, the sapphire glass is finally finished through fine grinding.
2. The precision grinding method for sapphire glass according to claim 1, characterized in that, The grinding media in steps one and three include a mixture of grinding powder and oily media.
3. The method for precision grinding of sapphire glass according to claim 1, characterized in that, The grinding device A in step one is a bakelite grinding head.
4. The method for precision grinding of sapphire glass according to claim 1, characterized in that, The R-angle of the grinding section of the grinding device A in step one includes a horizontal side, a hypotenuse, and a vertical side that are parallel to the platform surface of the product, and the length of the hypotenuse is longer than the length of the vertical side.
5. The method for precision grinding of sapphire glass according to claim 1, characterized in that, The platform portion in step four refers to the concave platform of the product, and the non-platform portion includes the radius (R-angle) of the non-platform portion and the arc surface of the non-platform portion.
6. The method for precision grinding of sapphire glass according to claim 1, characterized in that, The grinding device B in steps three and four is a bakelite pen.
7. The method for precision grinding of sapphire glass according to claim 1, characterized in that, The grinding part of the grinding device C in step five is a flat-bottomed, right-angled grinding head, and the material of the grinding head includes metal copper.
8. The method for precision grinding of sapphire glass according to claim 1, characterized in that, The arc surface of the non-platform part in step eight is the arc surface area between the R-angle of the platform part and the non-platform part.
9. The method for precision grinding of sapphire glass according to claim 1, characterized in that, The grinding part of the grinding device D in step seven is a flat-bottomed grinding head with a radius (R), and the material of the grinding head includes metallic copper.
10. The method for precision grinding of sapphire glass according to claim 1, characterized in that, The R-angle of the grinding section of the grinding device D in step eight includes a horizontal side, a hypotenuse, and a vertical side that are parallel to the platform surface of the product, and the length of the hypotenuse is shorter than the length of the vertical side.