CN111590451A

CN111590451A - Curved glass polishing method and device

Info

Publication number: CN111590451A
Application number: CN202010548798.9A
Authority: CN
Inventors: 李倩倩; 陈亚兵; 许仁; 王伟
Original assignee: Weidali Industry Chibi Co ltd; Wanjin Industrial Chibi Co Ltd
Current assignee: Weidali Industry Chibi Co ltd; Wanjin Industrial Chibi Co Ltd
Priority date: 2020-06-16
Filing date: 2020-06-16
Publication date: 2020-08-28

Abstract

The invention discloses a curved glass polishing method and a curved glass polishing device. The polishing method comprises the following steps: pre-polishing: pre-polishing the surface to be polished of the curved glass, and removing part of salient points on the surface of the curved glass; fixed-point polishing: polishing and removing the convex points still remained on the curved glass surface by using a first polishing head, wherein the first polishing head is provided with a smooth curved polishing surface, and the radial width of the polishing surface at the widest position is 0.1-1.5 mm; local polishing: polishing the part polished by the point by using a second polishing head until the part is smooth, wherein the second polishing head is provided with a smooth curved surface-shaped polishing surface, and the radial width of the widest part of the polishing surface is between 2mm and 20 mm; in the polishing process, the polishing solution is sprayed to the polished part. Compared with the traditional polishing method, the method can effectively remove the salient points which are difficult to remove in the traditional polishing method, can also save polishing media, reduce the damage of polishing to the glass body and improve the yield of the curved glass.

Description

Curved glass polishing method and device

Technical Field

The invention relates to the technical field of glass, in particular to a curved glass polishing method and a curved glass polishing device.

Background

Glass structures are increasingly being used in electronic devices, such as covers or backshells for cell phones, smart watch cases, appliance covers, and the like. As the technology for manufacturing curved glass having a large curvature matures, the cover plates or housings of many electronic devices are also turning to curved glass having a more complicated structure.

In the prior art, a hot bending mode is usually adopted to process plate glass into curved glass, however, the curved glass is manufactured in a hot bending mode, so that defects such as mold marks, salient points, fog marks and the like inevitably occur in the process of manufacturing the curved glass, and if the defects are left on the outer surface of the glass, the service performance is seriously influenced. The traditional polishing process generally adopts a polishing medium represented by a polishing brush to polish the whole surface of the glass, can remove mold marks, fog marks and partial salient points, and still has residual salient points to influence the service performance of the curved glass and further influence the yield. If the polishing time is prolonged and the polishing abrasion is increased in order to remove the serious bumps, the bumps cannot be completely removed in most cases, and the glass products are fragile and have low yield.

Disclosure of Invention

In view of the above problems, it is an object of the present invention to provide a polishing method for bumps generated during a hot bending process of curved glass, so as to remove bumps on the surface of curved glass, which is difficult to remove by conventional methods.

According to one embodiment of the invention, a curved glass polishing method comprises the following steps:

pre-polishing: pre-polishing the surface to be polished of the curved glass to remove part of salient points on the surface of the curved glass;

fixed-point polishing: polishing and removing the bumps still remained on the surface of the curved glass by using a first polishing head, wherein the first polishing head is provided with a smooth curved polishing surface, and the radial width of the polishing surface at the widest position is 0.1-1.5 mm;

local polishing: polishing the part polished by the fixed point to be smooth by using a second polishing head, wherein the second polishing head is provided with a smooth curved surface-shaped polishing surface, and the radial width of the widest part of the polishing surface is between 2mm and 20 mm;

and in the processes of the pre-polishing, the fixed-point polishing and the local polishing, polishing liquid is sprayed to the polished part.

In one embodiment, the polishing surface of the first polishing head is made of a ceramic-rubber composite material, and the ceramic particles forming the ceramic-rubber composite material have a D50 particle size of 1-50 μm.

In one embodiment, the polishing surface of the second polishing head is made of a material selected from rubber, plastic or a rubber-ceramic composite.

In one embodiment, during the pre-polishing, a polishing brush is used for pre-polishing.

In one embodiment, during the fixed-point polishing, the rotation speed of the first polishing head is 8000-15000 r/min, and the polishing time of a single salient point part is 3-20 min.

In one embodiment, during the local polishing, the rotation speed of the second polishing head is 5000r/min to 10000r/min, and the polishing time of a single salient point part is 3min to 40 min.

In one embodiment, the first polishing head and the second polishing head are controlled to move to the detected bump positions for polishing by combining detection and identification of bump positions; and

and controlling the spraying position of the polishing solution.

There is also provided, in accordance with an embodiment of the present invention, a curved glass polishing apparatus, including:

the pre-polishing component is used for pre-polishing the surface to be polished of the curved glass so as to remove part of salient points on the surface of the curved glass;

the bump polishing part comprises a polishing machine main body and a working polishing head; the polishing machine main body is provided with a polishing handle which is fixedly connected with the working polishing head and can drive the working polishing head to rotate; the working polishing head is provided with a polishing surface for polishing, the working polishing head comprises a first polishing head and a second polishing head, the first polishing head is provided with a smooth curved surface-shaped polishing surface, and the radial width of the widest part of the polishing surface is 0.1-1.5 mm; the second polishing head is provided with a smooth curved polishing surface, and the radial width of the polishing surface at the widest position is between 2mm and 20 mm; and

and the polishing solution spraying part is used for spraying polishing solution to the working polishing head and the polishing part in the polishing process.

In one embodiment, the curved glass polishing apparatus further comprises:

a control member electrically connected to the polishing handle and the polishing liquid jetting member; the control component is used for controlling the polishing handle and the polishing liquid spraying component to move so as to finish polishing.

In one embodiment, the curved glass polishing apparatus further comprises:

the detection component is used for detecting and identifying the position of a convex point on the surface of the curved glass to be polished and is electrically connected with the control component;

the control component is used for controlling the polishing handle to move to the convex point position detected by the detection component for polishing; and

and controlling the polishing solution injection part to move and inject the polishing solution according to the polishing position.

The polishing method of the curved glass aims at the serious salient points on the curved glass which cannot be processed by the traditional polishing method, and designs a fixed-point polishing method, wherein the salient points are removed at fixed points by using a polishing head with a polishing part being a smooth curved surface with the radial width of 0.1-1.5 mm, and the local surface defects existing after fixed-point polishing are repaired by further using the polishing head with the polishing part being a smooth curved surface with the radial width of 2-20 mm. Compared with the traditional polishing method, the method has the advantages that the salient points which are difficult to remove in the traditional polishing method can be effectively removed, polishing media can be saved, damage to the glass body caused by polishing can be reduced, and the yield of the curved glass is improved.

Preferably, the curved glass polishing method combines the detection and identification of the positions of the salient points, and controls the operation of the first polishing head and the second polishing head according to the positions, so that a full-automatic polishing process can be realized, the labor is saved, and the working efficiency is improved.

Drawings

FIG. 1 is a schematic view of a curved glass polishing method according to an embodiment;

FIG. 2 is a schematic view of a polishing apparatus according to an embodiment;

FIG. 3 is a schematic view of a polishing surface of a working polishing head for polishing according to one embodiment;

FIG. 4 is a schematic longitudinal section of a first polishing head according to one embodiment;

FIG. 5 is a schematic longitudinal section of a first polishing head according to one embodiment;

FIG. 6 is a schematic longitudinal section of a second polishing head according to one embodiment;

FIG. 7 is a schematic longitudinal section of a second polishing head, according to one embodiment.

Detailed Description

To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items. "Multi", as used herein, means a combination of two or more items.

Polishing is essentially a process by which the surface roughness of a device is reduced and becomes shiny and flat. Mechanical polishing is usually accomplished by removing a small amount of the device surface material with a polishing medium. The traditional glass polishing method usually adopts a polishing brush, and a certain amount of polishing medium can be added, so that the fine defects originally existing on the surface of the glass are removed through polishing for a certain time, the polishing step is completed, and the glass with a smooth surface is obtained. But the method has no pertinence to the salient points generated in the hot bending preparation process of the curved glass. In fact, the bumps are also referred to as "bumps and dips" because the bumps are often accompanied by depressions around them that are not noticeable to the naked eye. For some fine bumps, such as those having diameters on the order of microns, the removal can also be made relatively easy by conventional polishing methods. However, for some larger sized bumps, such as bumps having a diameter of approximately or exceeding 0.1mm, it is extremely difficult to completely remove the bumps during actual polishing using conventional polishing methods; if the polishing time is prolonged and the abrasion amount of the curved glass is increased, the traditional polishing method aims at pre-polishing, so that the polishing efficiency is low, the glass product is fragile, and the yield is reduced. Therefore, there is a need for a new polishing method that is targeted for curved glass bumps.

According to an embodiment of the present invention, referring to fig. 1, a curved glass polishing method includes the following steps.

Step S100, pre-polishing: and pre-polishing the surface to be polished of the curved glass, and removing part of salient points on the surface of the curved glass.

The curved glass surface obtained after the hot bending treatment inevitably has die marks, fog marks and salient points. The purpose of the pre-polishing in this step is mainly to remove the stamp, the haze mark, and a part of the bump that can be removed in this step.

As a specific example of the present embodiment, in the pre-polishing process, pre-polishing is performed using a polishing brush.

In the pre-polishing process, a clamping fixture matched with the shape of the glass is usually needed to fix the curved glass to be polished, and then a rough polishing head is used to polish two surfaces of the curved glass. As a specific example of the present embodiment, the time for single-side polishing is 10min to 120 min; preferably, the polishing time is 10min to 60 min; more preferably, the time for single-side polishing is 20min to 50 min. For example, the polishing time can be 20min, 25min, 30min, 35min, 40min, 45min or 50min according to the surface condition of the glass to be polished and the selection of the polishing head.

Through the pre-polishing treatment, the curved surface glass surface can basically realize brightness and flatness, but still has a part of larger salient points which cannot be processed. However, if the polishing time is prolonged, not only the bumps may not be effectively removed, but also the material loss of the polishing head and the glass may be increased, so that the glass is fragile, and the yield is reduced.

Step S200, fixed point polishing: and polishing and removing the bumps still remained on the surface of the curved glass by using the first polishing head.

The first polishing head is provided with a smooth curved polishing surface, and the radial width of the widest part of the polishing surface is between 0.1mm and 1.5 mm.

In general, since the first polishing head needs to rotate at a high speed for polishing during polishing, in order to ensure rotational symmetry, the round curved surface should be a surface that is approximately conical, spherical or ellipsoidal, and the projection surface along the axial direction should be a circle, where the "radial direction" in the "radial width" is the direction perpendicular to the axial direction, and the "radial width" is the diameter of the circle. Referring also to FIG. 3, there are shown cross-sectional shapes of the polishing surfaces of the first polishing heads taken along a plane in which either axis is located, and radial widths d of the polishing surfaces of different shapes.

The fixed-point polishing step is directed to the bump that cannot be completely processed in step S100, and therefore it is necessary to adopt a first polishing head capable of polishing the bump. In this embodiment, the polishing surface of the first polishing head for polishing is a smooth curved surface with a radial width of 0.1mm to 1.5mm at the widest point. Understandably, "polishing surface for polishing" refers to a portion which comes into frictional contact with a site to be polished during polishing. In the actual polishing process, the polishing head is rotated to be in frictional contact with a part to be polished to polish so as to remove the salient points; therefore, the smooth curved surface with the radial width of 0.1 mm-1.5 mm is adopted for polishing, the polishing contact surface is smaller, and the convex points are pointed as much as possible.

As a specific example of this embodiment, the material of the first polishing head is a ceramic rubber composite material. More precisely, it is a rubber material compounded with ceramic powder. The ceramic rubber composite material has good strength and wear resistance, and can effectively eliminate salient points on the surface of curved glass which are difficult to remove in the polishing process. Optionally, the ceramic particles constituting the ceramic rubber composite have a D50 particle size of 1 to 50 μm.

As a specific example of this embodiment, in the fixed-point polishing process, when the rotation speed of the first polishing head is 8000r/min to 15000r/min, the rotation speed of the polishing head is too slow, which easily causes the polishing area to be too large, and the polishing area is not strong, and is not suitable for eliminating the bumps. The polishing time for a single salient point part is 3-20 min, and can be adjusted according to the size of the salient point; preferably, the polishing time is 5min to 10min, for example, 5min, 5.5min, 6min, 6.5min, 7min, 7.5min, 8min, 8.5min, 9min, 9.5min, 10 min. When the polishing time is short, the salient points cannot be effectively removed, and when the polishing time is too long, the polishing abrasion consumption is too large, and new shape defects are generated.

As a specific example of this embodiment, the bump portion may be detected during the point polishing process, and when it is detected that the bump portion is polished flat, i.e., the point polishing process is stopped, the polishing amount is precisely controlled.

And step S300, polishing the part polished by the fixed point by using a second polishing head until the part is flat. The second polishing head is provided with a smooth curved polishing surface, and the radial width of the widest part of the polishing surface is between 2mm and 20 mm.

The bumps on the curved glass surface are usually accompanied by tiny concave and convex fluctuation around the bumps. Moreover, during the fixed-point polishing process, certain new defects are generated at the original bumps. Therefore, the local polishing is to further polish and polish the fixed-point polishing part, so as to eliminate the original micro defects of the salient point area or the micro defects brought by the fixed-point polishing process, and ensure that the area is smoother and is more smoothly connected with the whole glass surface.

In this embodiment, the second polishing head has a polishing surface having a smoothly curved surface, and the radial width of the polishing surface at the widest point is between 2mm and 20 mm. The meaning of "radial width" here is the same as described above. The radial width of the second polishing head is far larger than the size of the actually existing salient point, and the function of the second polishing head is to polish and polish the area where the salient point is located locally.

In a specific example of this embodiment, the material of the second polishing portion is selected from rubber, plastic or rubber-ceramic composite material. Wherein, the ceramic rubber composite material has better strength and wear resistance. Optionally, the ceramic particles constituting the ceramic rubber composite material have a D50 particle size of 0.1 to 10 μm.

In a specific example of the embodiment, the rotation speed of the second polishing head is 5000r/min to 10000r/min during the partial polishing. Compared with the fixed point polishing process, the local polishing process mainly aims at repairing the surface shape of the glass to make the glass smoother, so that the polishing speed is relatively low. The polishing time of a single salient point part is 3-40 min, and can be selected according to the material of the polishing head, the size of a polishing area or the surface fluctuation degree. Preferably, the polishing time is 5min to 20 min. For example, 5min, 6min, 7min, 8min, 10min, 12min, 14min, 16min, 18min, 20 min.

In a specific example of this embodiment, during the pre-polishing, the spot polishing, and the local polishing, a polishing liquid should be sprayed to the polishing portion. The polishing solution can be selected from common glass polishing solutions, such as cerium oxide polishing solution.

In other specific examples of this embodiment, the bump position may also be detected and identified, and the first polishing head and the second polishing head are controlled to move to the detected bump position for polishing according to the detection and identification result; meanwhile, the spraying position of the polishing solution can be controlled simultaneously, so that the whole polishing process can be automatically completed.

The polishing method can eliminate the salient points on the curved glass which cannot be processed by the traditional polishing method, and can ensure the flatness of the glass surface as much as possible. Compared with the traditional polishing method, the method has the advantages that the salient points which are difficult to remove in the traditional polishing method can be effectively removed, the polishing time can be relatively shortened, the polishing medium is saved, the damage of polishing to the glass body is reduced, and the yield of the curved glass is improved.

On the other hand, according to one embodiment, there is also provided a curved glass polishing apparatus for implementing the above-described curved glass polishing method, including:

the bump polishing part comprises a polishing machine main body and a working polishing head; the polishing machine main body is provided with a polishing handle which is fixedly connected with the working polishing head and can drive the working polishing head to rotate; the working polishing head is provided with a polishing surface for polishing, the working polishing head comprises a first polishing head and a second polishing head, the first polishing head is provided with a smooth curved surface-shaped polishing surface, and the radial width of the widest part of the polishing surface is 0.1-1.5 mm; the second polishing head is provided with a polishing surface in a smooth curved surface shape, and the radial width of the polishing surface at the widest position is between 2mm and 20 mm; and

and the polishing solution spraying part is used for spraying polishing solution to the polishing head and the polishing part in the polishing process.

As a specific example of the present embodiment, please refer to fig. 2, which shows a configuration of a work polishing head, a polishing handle and a polishing liquid injection member connected to each other.

The curved glass polishing apparatus includes a polisher body (not shown), a polishing handle 20 fixed to the polisher body to be capable of rotating and fixedly connected to a working polishing head 10.

In one specific example, the working polishing head 10 includes a polishing surface 11 and a connecting body 12, and the connecting body 12 and the polishing handle 20 are connected by a detachable fixing assembly 13. Alternatively, for example, the detachable retaining assembly 13 includes a retaining groove (not shown) disposed in the polishing handle 20 and a retaining rod 13 disposed on the working polishing head 10 and coupled to the coupling body 12. In the working process of the polishing device, an electrode in the polishing machine main body drives a working polishing head 10 to rotate through a polishing handle 20, and a polishing surface 11 is in contact friction with the surface of the curved glass for polishing.

As a specific example of the present embodiment, the polishing liquid spraying part has a pipe 30 for delivering the polishing liquid, the pipe 30 includes a pipe body 31 and a pipe orifice 32, the pipe body 31 is fixedly disposed at a side of the polishing handle 20, and an opening of the pipe orifice 32 is directed to a polishing surface of the working polishing head 10 connected to the polishing handle 20, for spraying the polishing liquid to the polishing surface and a polishing portion during the polishing process.

Wherein, preferably, the polishing liquid injection member has at least two pipes 30 and is disposed at the side of the polishing handle 20 at regular intervals.

In another embodiment, the conduit is an annular conduit comprising an annular tube body and an annular nozzle, the annular tube body being fixedly disposed around the polishing handle; the annular nozzle surrounds a working polishing head attached to the polishing handle and has an opening directed toward a polishing surface of the working polishing head.

As a specific example of the present embodiment, the curved glass polishing apparatus further includes a jig base for fixing the curved glass.

The first polishing head is directed to polishing the bumps that the pre-polishing member cannot completely handle. In this embodiment, the polishing surface of the first polishing head for polishing is a smooth curved surface with a radial width of 0.1mm to 1.5mm at the widest point. Understandably, "polishing surface for polishing" refers to a portion which comes into frictional contact with a site to be polished during polishing. In the actual polishing process, the polishing head is rotated to be in frictional contact with a part to be polished to polish so as to remove the salient points; therefore, the smooth curved surface with the radial width of 0.1 mm-1.5 mm is adopted for polishing, the polishing contact surface is smaller, and the convex points are pointed as much as possible.

Optionally, the first polishing head is fixed to the first linkage. The first connecting body is fixedly connected with the first polishing head and has a structure which smoothly or smoothly extends downwards from the curved surface of the first polishing head and has unchanged or gradually increased radial width. The connecting body is also provided with a first clamping rod which is fixedly connected with the polishing handle, such as a fixing bayonet. The rotating base drives the first polishing head to rotate through the first clamping rod and the first connecting body.

Referring to fig. 4 and 5, there are shown two general shapes of a section of the first polishing head including the first connecting body and the first clamping rod, wherein the section can obtain a corresponding solid figure by rotating around the central axis. Referring to one specific example shown in fig. 4, it can be understood that the first polishing portion 111 includes a semi-ellipsoidal shape, the first connecting body 121 includes a truncated cone shape, and the first clamping rod 131 includes a cylindrical shape; or referring to another specific example of fig. 5, it includes an ellipsoidal first polishing portion 112, a truncated cone-shaped first connecting body 122, and a cylindrical first clamping rod 132; the location of the first clamping bar for fixing is not shown in detail. It should be understood that the polishing heads described above are only two specific examples, and in other specific examples, it is also possible to make alternatives according to the technical solution. For example, the first polished portion may be a hemisphere rather than a semi-ellipsoid, or an object whose surface is a smooth curved surface; the connector can also be a deformed cone with convex or concave side walls.

Preferably, the radial width of the polishing surface of the first polishing head at the widest position is 0.5 mm-1.5 mm; more preferably, the polishing surface of the first polishing head has a radial width at the widest point of 0.5mm to 1.0 mm. For example: the radial width is 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1.0 mm. The radial width of the first polishing surface is not suitable to be too wide or too narrow, and the condition of obvious polishing recess can be generated in the actual polishing process if the radial width is too wide; too narrow can lead to can't effectively getting rid of to bump whole, and the polishing position volume is less in addition, and easy damage is difficult to accomplish polishing work. Optionally, the ratio of the radial width to the axial width of the first polishing head is 2:1 to 1: 5. "axial height" refers to the distance from the apex of the curved surface of the polishing surface to the plane of the widest point of the polishing surface.

The second polishing head is used for polishing the part polished by the fixed point to be smooth, and the second polishing head is provided with a smooth curved surface-shaped polishing surface, and the radial width of the widest part of the polishing surface is between 2mm and 20 mm.

In practical applications, the second polishing head may be fixed to a second connecting body, and the second connecting body has a structure that extends smoothly or smoothly downward from the curved surface of the first polishing head and has a radial width that gradually increases. The connecting body is also connected with a second clamping rod which is fixedly connected with the polishing handle, such as a fixed bayonet. The rotating base drives the second polishing head to rotate through the second clamping rod and the second connecting body.

Referring to fig. 6 and 7, the shapes of a cross section of two second polishing heads including a second connecting body and a second clamping rod are shown, and the cross section can obtain a corresponding solid figure by rotating around a central axis. Referring to one specific example shown in fig. 6, it can be understood that the second polishing portion 113 includes a semi-ellipsoidal second polishing portion, a truncated cone-shaped second connecting body 123, and a cylindrical second clamping rod 133; or referring to another specific example of fig. 7, it includes an ellipsoidal second polishing portion 114, a truncated cone-shaped second connecting body 124, and a cylindrical second clamping rod 134; the location of the second clamping bar for fixing is not shown in detail. In other specific examples, the components may be replaced according to the technical scheme.

Preferably, the polishing surface of the second polishing head is a smooth curved surface with the radial width of 2 mm-15 mm at the widest position; more preferably, the polished surface is a smooth curved surface having a radial width of 2mm to 10mm at the widest point. For example: the radial width is 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10 mm. In addition, the axial height of the second polishing surface, i.e. the curved surface protrusion, should not be too high, for example, the axial height of the second polishing head is 0.1-1 mm. Optionally, the ratio of the radial width to the axial height of the second polishing region is 5:1 to 20: 1; preferably, the ratio of the radial width to the axial height of the second polishing portion is 10:1 to 20: 1. "axial height" refers to the distance from the apex of the curved surface of the polishing surface to the plane of the widest point of the polishing surface.

It should be understood that in other specific examples, the polishing handle may be provided with a clamping rod and the working polishing head may be provided with a groove, which will not be described herein.

In a specific example of the embodiment, a ratio of the radial widths of the first polishing head and the second polishing head is 1:4 to 1: 10.

Preferably, in a specific example of this embodiment, the polishing apparatus further includes a control member electrically connected to the pre-polishing member, the first polishing head, the second polishing head, and the polishing liquid injection member; the polishing device is used for controlling the pre-polishing part, the first polishing head, the second polishing head and the polishing liquid spraying part to move to finish polishing.

More preferably, in a specific example of the embodiment, the polishing apparatus further comprises a detecting part for detecting a position of the bump for identifying the curved glass surface, the detecting part being electrically connected to the control part;

the control component is used for controlling the first polishing head and the second polishing head to move to the bump position detected by the detection component for polishing; and

and controlling the polishing liquid injection part to move and inject the polishing liquid according to the polishing position.

The curved glass polishing device can effectively eliminate the salient points on the curved glass which cannot be processed by the traditional polishing method, and ensures the smoothness of the glass surface as far as possible. Compare traditional burnishing device, it not only can effectively get rid of the bump that is difficult to get rid of in traditional polishing method, can also shorten polishing time relatively, saves polishing medium, reduces the damage that the polishing caused to the glass body, promotes curved surface glass's yields.

For easier understanding and realization of the invention, the following test examples, which are easier to implement and more specific, are also provided as references. The embodiments of the invention and their advantages will also be apparent from the description of specific test examples and the performance results set forth below.

The starting materials used in the following test examples and comparative examples were all commercially available without specific reference.

Test example 1

(1) Obtaining 3D curved glass formed by hot bending, clamping the curved glass by using a profile clamp jig, and fixing the curved glass; the profiling clamp jig is made of acrylic materials.

(2) Pre-polishing: installing the profiling clamp jig on a 3D polishing machine, polishing the whole glass by adopting a polishing brush, wherein the polishing time of one surface of the glass is 50min, and fully removing the mold print and the tiny convex points on the surface of the curved glass; and continuously spraying cerium oxide polishing solution to the polishing part including the polishing brush and the glass surface in the polishing process.

(3) Fixed-point polishing: after pre-polishing, macroscopic salient points still exist on the surface of the glass, and a first polishing head with the radial width of 0.5mm is adopted; the rubber ceramic composite material is a rubber ceramic composite material, wherein the D50 particle size of ceramic particles is 1 mu m; polishing the salient points one by one until the salient points are eliminated, wherein the original salient points are flat, the rotating speed of a polishing head is 8000r/min, and the polishing time is 5-10 min according to the sizes of the salient points; and continuously spraying the cerium oxide polishing solution to the polishing part including the polishing head and the glass surface in the polishing process.

(4) Local polishing: after point polishing, a smooth curved surface polishing head with the radial width of 2mm is adopted, and the height of the polishing head is 0.1 mm; the polishing head is made of rubber material; polishing the bump area polished by the points, wherein the rotating speed of a polishing head is 5000r/min, and the polishing time is 20 min; and continuously spraying the cerium oxide polishing solution to the polishing part including the polishing head and the glass surface in the polishing process.

(5) And cleaning the polished glass surface, and drying to obtain a curved glass product.

Test example 2

(1) Obtaining 3D curved glass formed by hot bending, clamping the curved glass by using a profile clamp jig, and fixing the curved glass; the profiling clamp jig is made of polyurethane materials.

(2) Pre-polishing: installing the profiling clamp jig on a 3D polishing machine, polishing the whole glass by adopting a polishing brush, wherein the polishing time of one surface of the glass is 30min, and fully removing the mold print and the tiny convex points on the surface of the curved glass; and continuously spraying cerium oxide polishing solution to the polishing part including the polishing brush and the glass surface in the polishing process.

(3) Fixed-point polishing: after pre-polishing, macroscopic salient points still exist on the surface of the glass, and a first polishing head with the radial width of 1mm is adopted; the rubber-ceramic composite material is a rubber-ceramic composite material, wherein the D50 particle size of ceramic particles is 10 mu m; polishing the salient points one by one until the salient points are eliminated, wherein the original salient points are flat, the rotating speed of a polishing head is 12000r/min, and the polishing time is 5-8 min according to the sizes of the salient points; and continuously spraying the cerium oxide polishing solution to the polishing part including the polishing head and the glass surface in the polishing process.

(4) Local polishing: after fixed-point polishing, a smooth curved polishing head with the radial width of 5mm is adopted, and the height of the polishing head is 0.5 mm; the polishing head is made of a plastic material; polishing the salient point area polished by the points, wherein the rotating speed of a polishing head is 8000r/min, and the polishing time is 10 min; and continuously spraying the cerium oxide polishing solution to the polishing part including the polishing head and the glass surface in the polishing process.

Test example 3

(2) Pre-polishing: installing the profiling clamp jig on a 3D polishing machine, polishing the whole glass by adopting a polishing brush, wherein the polishing time of one surface of the glass is 20min, and fully removing the mold print and the tiny convex points on the surface of the curved glass; and continuously spraying cerium oxide polishing solution to the polishing part including the polishing brush and the glass surface in the polishing process.

(3) Fixed-point polishing: after pre-polishing, macroscopic salient points still exist on the surface of the glass, and a first polishing head with the radial width of 1.5mm is adopted; the rubber-ceramic composite material is a rubber-ceramic composite material, wherein the D50 particle size of ceramic particles is 50 mu m; (ii) a Polishing the salient points one by one until the salient points are eliminated, wherein the original salient points are flat, the rotating speed of a polishing head is 15000r/min, and the polishing time is 5-8 min according to the sizes of the salient points; and continuously spraying the cerium oxide polishing solution to the polishing part including the polishing head and the glass surface in the polishing process.

(4) Local polishing: after fixed-point polishing, a smooth curved polishing head with the radial width of 10mm is adopted, and the height of the polishing head is 0.8 mm; the polishing head is made of a rubber ceramic composite material, wherein the D50 particle size of the ceramic particles is 10 microns; polishing the bump area polished by the points, wherein the rotating speed of a polishing head is 10000r/min, and the polishing time is 5 min; and continuously spraying the cerium oxide polishing solution to the polishing part including the polishing head and the glass surface in the polishing process.

Comparative example 1

(3) And cleaning the polished glass surface, and drying to obtain a curved glass product.

Comparative example 2

(4) And cleaning the polished glass surface, and drying to obtain a curved glass product.

Comparative example 3

(3) After pre-polishing, a smooth curved polishing head with the radial width of 10mm is adopted, and the height of the polishing head is 0.8 mm; the polishing head is made of rubber material; polishing the salient point part, wherein the rotating speed of a polishing head is 10000r/min, and the polishing time is 5 min; and continuously spraying the cerium oxide polishing solution to the polishing part including the polishing head and the glass surface in the polishing process.

Comparative example 4

(3) Fixed-point polishing: after pre-polishing, macroscopic salient points still exist on the surface of the glass, and a first polishing head with the radial width of 2mm is adopted; the rubber-ceramic composite material is a rubber-ceramic composite material, wherein the D50 particle size of ceramic particles is 50 mu m; polishing the salient points one by one until the salient points are eliminated, wherein the original salient points are flat, the rotating speed of a polishing head is 15000r/min, and the polishing time is 5-8 min according to the sizes of the salient points; and continuously spraying the cerium oxide polishing solution to the polishing part including the polishing head and the glass surface in the polishing process.

(4) Local polishing: after point polishing, a smooth curved surface polishing head with the radial width of 30mm is adopted, and the height of the polishing head is 5 mm; the polishing head is made of rubber material; polishing the bump area polished by the points, wherein the rotating speed of a polishing head is 10000r/min, and the polishing time is 5 min; and continuously spraying the cerium oxide polishing solution to the polishing part including the polishing head and the glass surface in the polishing process.

The above-mentioned test examples 1 to 3 are specific examples provided according to the embodiment of the present invention, comparative example 1 is a conventional polishing method, comparative example 2 is a polishing method which is subjected to spot polishing but not to partial polishing, comparative example 3 is a polishing method which is directly subjected to partial polishing, and comparative example 4 is a polishing method which uses a polishing portion having a large size for polishing. The surface topography of the curved glass products obtained from the test examples and comparative examples is shown in table 1 below.

TABLE 1

	Surface appearance of curved glass product
		Test example 1	The surface is smooth and clean, and no macroscopic mold printing or salient points exist
Test example 2	The surface is smooth and clean, and no macroscopic mold printing or salient points exist
		Test example 3	The surface is smooth and clean, and no macroscopic mold printing or salient points exist
Comparative example 1	The surface is smooth and bright and has partial larger convex points
		Comparative example 2	Part of the bumps are polished flat but with micro-concave fluctuation
Comparative example 3	The salient points are slightly reduced but obviously exist
		Comparative example 4	Excessive edge throwing of the bumps produces significant polishing dishing

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent a preferred embodiment of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. The curved glass polishing method is characterized by comprising the following steps:

2. The method for polishing curved glass according to claim 1, wherein the polishing surface of the first polishing head is made of a ceramic-rubber composite material, and the ceramic particles constituting the ceramic-rubber composite material have a D50 particle size of 1 μm to 50 μm.

3. The method for polishing curved glass according to claim 1, wherein the polishing surface of the second polishing head is made of a material selected from the group consisting of rubber, plastic, and rubber-ceramic composite.

4. A curved glass polishing method according to any one of claims 1 to 3, wherein in the pre-polishing process, pre-polishing is performed using a polishing brush.

5. A curved glass polishing method according to any one of claims 1 to 3, wherein the rotation speed of the first polishing head is 8000r/min to 15000r/min and the polishing time of a single bump portion is 3min to 20min during the fixed-point polishing.

6. A curved glass polishing method according to any one of claims 1 to 3, wherein the rotation speed of the second polishing head is 5000 to 10000r/min and the polishing time of a single bump portion is 3 to 40min during the local polishing.

7. The curved glass polishing method as claimed in claim 1, wherein the first polishing head and the second polishing head are controlled to move to the detected bump positions for polishing by combining the detection and identification of the bump positions; and

and controlling the spraying position of the polishing solution.

8. The utility model provides a curved surface glass burnishing device which characterized in that includes:

9. The curved glass polishing apparatus according to claim 8, further comprising:

10. The curved glass polishing apparatus according to claim 9, further comprising: