A method of polishing a glass composite
By using a chemical-mechanical hybrid polishing method, the step height is first reduced by using a chemical polishing etchant, and then mechanical polishing is performed. This solves the problems of long mechanical polishing time and over-polishing, and achieves efficient and smooth connection of glass composites.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- BYD CO LTD
- Filing Date
- 2022-08-30
- Publication Date
- 2026-07-14
Smart Images
Figure CN117655889B_ABST
Abstract
Description
Technical Field
[0001] This disclosure relates to the field of glass polishing technology, and more specifically, to a polishing method for glass composites. Background Technology
[0002] Currently, for unequal thickness fused glass structures, existing technologies mostly employ mechanical polishing to remove steps and achieve a smooth transition between the two components, thus enabling a smooth connection. Mechanical polishing typically uses brush-like consumables, removing steps under the abrasive action of cerium oxide polishing slurry.
[0003] Currently, there are two commonly used mechanical polishing methods. One is overall polishing, which uses a curved surface polishing machine to polish structural parts of unequal thickness as a whole. However, due to the obstruction of the protruding parts above the joint between the two parts, the bristles do not easily reach the bottom step area, so this method is time-consuming. Moreover, the large surface of the substrate will be severely over-polished. The other method is local polishing, which uses a small brush or small grinding head to polish the joint by walking a path. However, the polishing area of the small grinding head is small, and each point does not have uninterrupted contact with the polishing material. It takes a few seconds of contact with the material after walking a circle, which is time-consuming, and the large surface near the joint is prone to discontinuity. Summary of the Invention
[0004] The purpose of this disclosure is to provide a method that avoids the drawbacks of purely mechanical polishing of glass composites with unequal thickness structures, which is time-consuming and prone to over-polishing.
[0005] To achieve the above objectives, this disclosure provides a polishing method for a glass composite, the glass composite comprising a substrate having a main surface and a boss protruding from the main surface of the substrate, wherein the boss has a step at the connection point with the substrate; the method includes:
[0006] S1 performs chemical polishing on the steps;
[0007] S2 performs mechanical polishing on the main surface of the glass composite.
[0008] Optionally, the method further includes: before step S1, fusing the boss glass to the main surface of the base glass to obtain a glass weld body; and then machining the edge of the boss glass to obtain the glass composite including the step.
[0009] Optionally, the height of the step is 0.01 to 0.08 mm.
[0010] Optionally, the raised glass is formed as a column, and the bottom surface of the column is fused to the main surface of the base glass; the bottom surface of the column is circular, elliptical, oblong, or polygonal, such as quadrilateral, pentagon, or octagon; the step is formed by mechanically removing the top edge of the column.
[0011] Optionally, after the chemical polishing is completed, the height of the step is less than 0.01 mm.
[0012] Optionally, the method further includes: masking the glass weld with ink prior to the machining, the ink being resistant to the corrosive agents of chemical polishing.
[0013] Optionally, the etchant used in the chemical polishing is hydrofluoric acid; the concentration of the etchant is 0.5–5 mol / L.
[0014] Optionally, the chemical polishing reaction rate is 0.002 mm / 3 min to 0.05 mm / 3 min, the reaction time is 3 min to 10 min, and the chemical polishing is performed under ultrasonic or bubbling conditions.
[0015] Optionally, the method further includes: cleaning and removing the ink from the chemically etched glass composite before step S2.
[0016] Optionally, in step S2, a curved surface polishing machine is used for the mechanical polishing, the polishing brush is made of animal hair, and the polishing liquid is a cerium oxide polishing liquid with a thickness of 1.0 μm to 9.0 μm.
[0017] Through the above technical solution, this disclosure provides a chemical-mechanical hybrid polishing method. First, a chemical polishing etchant is used to corrode and reduce the height of the step at the junction of the substrate and the boss, and then mechanical polishing is used for overall polishing. This significantly shortens the polishing time and avoids over-polishing, achieving a smooth connection between the substrate and the boss. This method is convenient to operate and time-saving, improving polishing production efficiency.
[0018] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description
[0019] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings:
[0020] Figure 1 This is a schematic diagram of the structure of a glass composite in one specific embodiment of the polishing method disclosed herein;
[0021] Figure 2 yes Figure 1 Enlarged schematic diagram of the cross-section of the central boss;
[0022] Figure 3 This is a photograph of the actual product in Example 1.
[0023] Explanation of reference numerals in the attached figures
[0024] 1: Base; 2: Boss; 3: Step. Detailed Implementation
[0025] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.
[0026] like Figure 1 As shown, this disclosure provides a polishing method for a glass composite, the glass composite including a substrate 1 having a main surface and a boss 2 protruding from the main surface of the substrate, the boss having a step 3 at the connection between the boss and the substrate; the method includes:
[0027] S1 performs chemical polishing on the steps;
[0028] S2 performs mechanical polishing on the main surface of the glass composite.
[0029] In this disclosure, the main surface of the substrate refers to the side surface where the substrate is connected to the boss, and the main surface of the glass composite refers to the side surface including the main surface of the substrate 1, which may include the main surface of the substrate 1 and all surfaces of the boss 2 (including the side steps 3 of the boss 2).
[0030] The polishing method disclosed herein first uses a chemical polishing etchant to corrode and reduce the height of the step at the junction of the substrate and the boss, and then uses mechanical polishing for overall polishing. This greatly shortens the polishing time and avoids over-polishing of the boss and substrate surfaces, achieving a smooth junction between the substrate and the boss. This method can effectively polish glass composites with bosses of varying thicknesses, is convenient to operate, time-saving, and yields glass composites with high surface quality.
[0031] According to this disclosure, the glass composite can be obtained by conventional methods, such as by fusing at least two glass components. In one embodiment, before step S1, the boss glass can be fused to the main surface of the base glass to obtain a glass weld; then the edge of the boss glass is machined to obtain a glass composite including steps 3. The glass fusion method is conventional in the art and is not particularly required in this disclosure; the machining method is not particularly limited, but CNC machining is preferred. After fusion, the base glass forms the base 1 in the glass composite; after fusion and machining, the edge of the boss glass is removed by cutting or other means, and its main body forms the boss 2 in the glass composite. The remaining edge of the boss glass forms steps 3 between the boss 2 and the base 1.
[0032] The shape of step 3 is not particularly limited. For example, it may have a top surface that is generally parallel to the main surface of the substrate, or a top surface that slopes downwards from the inside out. The top surface of the step may be flat or curved. In a further embodiment, the height of step 3 is 0.01–0.08 mm, preferably 0.01–0.05 mm, to facilitate subsequent removal of the step by chemical and mechanical polishing, forming a smooth connection. The height of the step refers to the distance from the outer edge of the step to the main surface of the substrate, for example… Figure 2 As shown, the top surface of the step is formed as a curved surface, and the step height h refers to the distance from the outer edge of the curved surface to the main surface of the substrate.
[0033] There are no special requirements for the shape of the boss glass. In a further embodiment, the boss glass is formed as a column, and the bottom surface of the column is fused to the main surface of the base glass. The shape of the bottom surface of the column can be circular, elliptical, oblong, or polygonal, such as quadrilateral, pentagon, or octagon. The step 3 is formed by removing the top edge of the column through machining. For example, in one embodiment, the entire edge of the top surface of the boss glass is removed by machining around it using a CNC machine tool, forming a machined top surface (i.e., the top surface of the boss 2) with an area smaller than the bottom surface, and a step 3 is formed around the boss 2 between the edge of the machined top surface and the base 1. Here, "bottom surface" refers to the side where the boss glass is fused to the base glass, and "top surface" refers to the side away from the main surface of the base glass.
[0034] In a further embodiment, the glass weld can be masked with ink prior to machining. The ink used is resistant to the corrosion of the chemical polishing agent. In the above embodiment, masking the glass weld with ink ensures that the target of subsequent chemical etching is the step formed after machining, i.e., the surface of the step requiring chemical polishing is exposed after machining, and protects other parts of the glass weld from corrosion by the chemical polishing agent.
[0035] In one embodiment of this disclosure, the etchant used in chemical polishing is hydrofluoric acid; the concentration of the etchant can be 0.5 to 5 mol / L, preferably 1.5 to 2.5 mol / L.
[0036] In one embodiment of this disclosure, the glass composite can be immersed in the aforementioned etchant for chemical polishing. The reaction rate of the chemical polishing can be 0.002 mm / 3 min to 0.05 mm / 3 min, preferably 0.005 mm / 3 min to 0.015 mm / 3 min, and the reaction time can be 3 min to 10 min, preferably 5 min to 7 min. In a further embodiment, the glass composite immersed in the etchant can be vibrated or shaken to ensure that the chemical polishing reaction proceeds uniformly at the steps of the glass composite. In another further embodiment, the chemical polishing is performed under ultrasonic or bubbling conditions, thereby dispersing the chemical polishing etchant more uniformly at the contact area with the steps, thus accelerating the reaction rate and improving the corrosion effect. The ultrasonic and bubbling conditions are conventional conditions.
[0037] In one embodiment of this disclosure, after chemical polishing, the height of step 3 can be less than 0.02 mm, for example, 0.005 to 0.015 mm. Through chemical polishing, step 3 is essentially removed.
[0038] In one embodiment of this disclosure, before step S2, the chemically etched glass composite can be cleaned to remove residual etchant from the surface, and then the ink plating can be stripped to remove ink masking.
[0039] In one embodiment of this disclosure, in step S2, a curved surface polishing machine is used for mechanical polishing. The polishing brush can be animal hair consumables, such as pig hair consumables. The polishing liquid can be cerium oxide polishing liquid of 1.0um to 9.0um, preferably cerium oxide polishing liquid of 2.0um to 4.0um, so as to completely remove the steps at the junction of the substrate and the boss, achieve a smooth connection between the two, and improve the surface quality.
[0040] In a preferred embodiment of this disclosure, polishing is performed through the following steps:
[0041] The protruding glass is fused to the main surface of the base glass to obtain a glass weld body;
[0042] The glass weld is masked with ink, and the ink used is resistant to the corrosion of chemical polishing agents;
[0043] The edges of the boss glass are machined to obtain a glass composite including step 3;
[0044] The glass composite is chemically polished by immersing it in an etchant.
[0045] Clean the chemically etched glass composite and remove the plating ink;
[0046] Mechanical polishing is performed using a curved surface polishing machine, polishing brushes, and polishing liquid.
[0047] The polishing method for glass composites disclosed herein is simple to operate and has significant effects. Compared with traditional mechanical polishing, it can effectively shorten the polishing time and avoid over-polishing.
[0048] The present invention is further described below by way of examples, but this disclosure is not limited thereto.
[0049] Unless otherwise specified, the reagents used in the examples are commercially available products of chemical purity.
[0050] Example 1
[0051] A glass protrusion with an elongated cylindrical base is fused to the main surface of a base glass to form a glass weld. The weld is then masked with ink; the selected ink is a single-component thermosetting ink resistant to hydrofluoric acid corrosion. The edges of the protruding glass are then machined using CNC machining to create a stepped glass composite. The height of step 3 after machining is 0.03 mm. Figure 1 As shown. Next, a chemical polishing reaction was performed. The glass weld was immersed in hydrofluoric acid (2.0 mol / L), the reaction rate was 0.01 mm / 3 min, and the reaction time was 6 min. The reaction was carried out under ultrasonic conditions. After chemical polishing, the height of step 3 was less than 0.01 mm. The chemically etched glass composite was removed and rinsed clean. Then, the plating ink was removed, and the deplated glass composite was mechanically polished using a curved surface polishing machine. The polishing brush was made of pig bristle, and the polishing liquid was 3.0 μm cerium oxide polishing liquid, until the step at the junction of the substrate and the boss was completely removed. Figure 3 As shown in the figure. The glass composite boss obtained in this embodiment has a smooth connection with the substrate and a high surface quality.
[0052] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.
[0053] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.
[0054] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.
Claims
1. A polishing method for a glass composite, characterized in that, The glass composite includes a substrate (1) having a main surface and a boss (2) protruding from the main surface of the substrate (1), wherein the boss (2) has a step (3) at the connection with the substrate (1); the method includes: S1 chemically polishes the step (3); the height of the step (3) is 0.01~0.08mm; S2 performs mechanical polishing on the main surface of the glass composite; the main surface of the glass composite includes the main surface of the substrate and all surfaces of the boss (2); The method further includes: before step S1, fusing the boss glass to the main surface of the base glass to obtain a glass weld body; then machining the edge of the boss glass to obtain the glass composite including the step (3); before the machining, masking the glass weld body with ink, the ink being a chemically resistant etchant; before step S2, cleaning the chemically etched glass composite and removing the ink.
2. The polishing method according to claim 1, characterized in that, The protruding glass is formed into a column, and the bottom surface of the column is fused to the main surface of the base glass; the bottom surface of the column is one of a circle, an ellipse, an oblong, or a polygon; the step (3) is formed by removing the top edge of the column by mechanical processing.
3. The polishing method according to claim 2, characterized in that, The polygon includes one of the following: quadrilateral, pentagon, and octagon.
4. The polishing method according to claim 1, characterized in that, After the chemical polishing is completed, the height of the step (3) is less than 0.02 mm.
5. The polishing method according to claim 1, characterized in that, The chemical polishing process uses hydrofluoric acid as the etchant; the concentration of the etchant is 0.5~5 mol / L.
6. The polishing method according to claim 1, characterized in that, The chemical polishing reaction rate is 0.002 mm / 3 min to 0.05 mm / 3 min, and the reaction time is 3 min to 10 min. The chemical polishing is carried out under ultrasonic or bubbling conditions.
7. The polishing method according to claim 1, characterized in that, In step S2, a curved surface polishing machine is used for mechanical polishing. The polishing brush is made of animal hair and the polishing liquid is a cerium oxide polishing liquid with a thickness of 1.0 μm to 9.0 μm.