Method and system for processing chamfered glass sheet based on ultra-thin glass

Abstract

The invention relates to a method and a system for processing a chamfered glass sheet based on ultra-thin glass. The method comprises the following steps: carrying out laser modification treatment on the ultra-thin glass by utilizing a laser profiling light beam to form a modified contour surface which is consistent with the side contour of the glass sheet and the shape of a chamfer to be obtained; the modified ultra-thin glass is placed in an etching solution, ultrasonic waves are applied to the etching solution, and a glass sheet automatically falls off based on gravity, the machining process is flexible and controllable, the edge quality is good, high-precision machining is achieved, the method is more suitable for hard and brittle materials such as the ultra-thin glass, environmental protection and no pollution are achieved, consumables are reduced, and the production cost is also reduced; a drainage groove extending towards the interior of the glass until approaching the modified contour surface can be formed through laser grooving before etching, and the etching liquid is introduced into the glass, so that the processing efficiency is improved; the glass bracket can be used for carrying large-breadth glass, can also be used as a jig during laser processing, and can also be matched with the hollowed-out groove body to be used as a liquid polishing jig, so that the processing efficiency is further improved.

Description

Technical Field

[0001] The present invention relates to the field of ultra-thin glass processing, and in particular to a method and a system for processing a chamfered glass sheet based on ultra-thin glass. Background Art

[0002] UTG (Ultra-Thin Glass) is an ultra-thin glass that has been widely used in electronic devices such as smartphones and tablets for its excellent light transmittance, toughness and wear resistance. However, UTG glass faces problems such as high processing difficulty, low efficiency and insufficient precision during processing, especially in edge chamfering. At present, the main methods and defects of UTG glass edge chamfering are as follows:

[0003] 1. Mechanical grinding method: Use a high-speed rotating grinding wheel or grinding wheel to grind the edge of UTG glass to achieve the purpose of chamfering, refer to patent CN118204869B. This method is mature in technology and has high processing efficiency, but it is easy to cause certain damage to the edge of the glass, and the processing accuracy and surface quality are greatly affected by the quality of the grinding wheel and the grinding parameters.

[0004] 2. Laser melting method: Use a laser beam to heat the edge of the UTG glass to make it molten, and then control the movement path and speed of the laser beam to make the molten glass edge form a smooth chamfer, refer to patent CN210475839U. This method has high processing accuracy, good surface quality, and can realize chamfering of UTG glass of different thicknesses and widths. However, the equipment cost is high and the operator's skills are required to be high.

[0005] 3. Chemical etching method: Use chemical etching liquid to etch the edge of UTG glass to achieve the purpose of chamfering. This method is usually used in combination with other methods to optimize the chamfering effect and processing efficiency, refer to patent CN114180848A. This method has a relatively gentle processing process and less damage to the edge of the glass, but the processing accuracy and surface quality are greatly affected by factors such as the type, concentration and etching time of the etching liquid.

[0006] 4. Combined processing method: In order to overcome the limitations of a single method and improve the processing quality and efficiency of UTG glass chamfering, a combined processing method is usually used. The current common combined methods are: first use laser cutting to preliminarily process the edge of the glass, and then use mechanical grinding to perform fine chamfering, refer to patent CN111995238A; or, first use mechanical cutting or laser cutting for pretreatment, and then combine chemical etching for final processing, refer to patents CN113788627A, CN116874192A. The current combined processing method has limited processing accuracy, and the size and shape accuracy of the UTG chamfer are difficult to achieve the ideal state; the overall processing efficiency is relatively low, which increases production costs and time costs.

[0007] The above information disclosed in this Background section is included only for enhancement of understanding of the background of the present disclosure and therefore it may contain information that does not form the prior art that is currently known to a person of ordinary skill in the art. Summary of the invention

[0008] The technical problem to be solved by the present invention is to provide a method and system for processing a chamfered glass sheet based on ultra-thin glass in view of the above-mentioned defects of the prior art.

[0009] The technical solution adopted by the present invention to solve its technical problem is:

[0010] On the one hand, a method for processing a chamfered glass sheet based on ultra-thin glass is constructed, which is used to process at least one glass sheet with a chamfer on the ultra-thin glass, and the method comprises:

[0011] Laser modification step: performing laser modification on the ultra-thin glass using a laser profiling beam to form a modified contour surface inside the ultra-thin glass that is consistent with the side contour and chamfer shape of the desired glass sheet, and the material within the modified contour surface is the desired glass sheet;

[0012] Static breaking step: placing the modified ultra-thin glass in an etching solution and applying ultrasonic waves to the etching solution, waiting for the glass sheet to automatically fall off from the ultra-thin glass due to gravity.

[0013] Furthermore, the ultra-thin glass is large-format glass, and the method of the present invention further comprises:

[0014] Large-format glass clamping steps: clamping the ultra-thin glass using a glass bracket;

[0015] The glass bracket comprises an upper bracket and a lower bracket, the upper bracket is embedded in the lower bracket, and the upper bracket and the lower bracket are both provided with a grid-shaped keel, and the number and plane size of the grids of the keel of the upper bracket and the keel of the lower bracket are the same and aligned one by one, the ultra-thin glass is placed flat between the keel of the upper bracket and the keel of the lower bracket, and the area where the ultra-thin glass falls between every two grids facing each other is a processing area, and each of the processing areas is used to process a piece of the glass sheet;

[0016] Among them, in the laser modification step, the entire glass holder is installed on a mobile platform, and the mobile platform is controlled to move with the glass holder according to a pre-set processing path, so that multiple processing areas are processed one by one to form the modified contour surface; in the static splitting step, the entire glass holder is placed in an etching solution.

[0017] Furthermore, the ultra-thin glass is a large-format glass. In the method of the present invention, in the static splitting step, the glass bracket is loaded into the hollow trough body, and then the hollow trough body is placed flat in the etching groove;

[0018] The interior of the hollow trough is divided into multiple small troughs, and hollow holes are provided on the surrounding side walls of the hollow trough and the partitions between the small troughs. The number and plane size of the small troughs are the same as the number and plane size of the lattices of the lower bracket keel. A plurality of earplug-shaped support columns are provided at the bottom of the small trough to support the glass sheet at multiple points after it falls off.

[0019] The method further comprises taking out the glass sheet by using a vacuum pen after the glass sheet falls off.

[0020] Furthermore, the ultra-thin glass is a large-format glass. In the method of the present invention, the method further comprises:

[0021] Laser grooving step: using a laser to perform a laser grooving process in an area outside the modified contour surface and close to the chamfer to form a drainage groove extending into the interior of the ultra-thin glass;

[0022] The laser grooving step is between the laser modification step and the static splitting step, so that in the static splitting step, the etching liquid penetrates into the drainage groove and etches to the modified contour surface and then etches along the modified contour surface.

[0023] Furthermore, the ultra-thin glass is large-format glass. In the method described in the present invention, the drainage groove includes an annular groove opened on the front side of the ultra-thin glass and surrounding the modified contour surface, or / and an annular groove opened on the back side of the ultra-thin glass and surrounding the modified contour surface.

[0024] Furthermore, the ultra-thin glass is a large-format glass. In the method described in the present invention, the drainage groove is recessed along the thickness direction of the ultra-thin glass; the recessed depth of the drainage groove is equivalent to the depth of the corresponding chamfer, and the shape of the drainage groove is the same as the side profile of the glass sheet, and the size is slightly larger than the size of the side profile of the glass sheet.

[0025] Furthermore, the ultra-thin glass is large-format glass. In the method described in the present invention, the laser modification step specifically includes: generating a profiling light beam having a shape consistent with the side profile of the glass sheet and the longitudinal cross-sectional profile of the chamfer, the profiling light beam comprising a plurality of focal points distributed along the side profile of the glass sheet and the longitudinal cross-sectional profile of the chamfer; and causing the profiling light beam to travel along a route corresponding to the side profile of the glass sheet to obtain the modified profile surface.

[0026] Furthermore, the ultra-thin glass is a large-format glass. In the method of the present invention, among the multiple focal points of the profiling light beam: the energy of the focal point located at the chamfered portion of the glass sheet is less than the energy of the focal point located at the middle portion of the side edge profile of the glass sheet;

[0027] The first focus and the last focus of the shaped light beam fall on the front side and the back side of the ultra-thin glass respectively.

[0028] In the second aspect, a system for processing a chamfered glass sheet based on ultra-thin glass is constructed to perform the above-mentioned method, wherein the system comprises: a laser device, an etching tank with an ultrasonic device inside, a glass bracket, and a hollow tank body;

[0029] The glass bracket comprises an upper bracket and a lower bracket, the upper bracket is embedded in the lower bracket, and the upper bracket and the lower bracket are both provided with a grid-shaped keel, and the number and plane size of the grids of the keel of the upper bracket and the keel of the lower bracket are the same and aligned one by one, the ultra-thin glass is placed flat between the keel of the upper bracket and the keel of the lower bracket, and the area where the ultra-thin glass falls between every two grids facing each other is a processing area, and each of the processing areas is used to process a piece of the glass sheet;

[0030] Among them, the interior of the hollow trough body is divided into multiple small grooves, and hollow holes are set on the four side walls of the hollow trough body and the partitions between the small grooves. The number and plane size of the small grooves are the same as the number and plane size of the grids of the lower bracket keel. Several earplug-shaped support columns are set at the bottom of the small grooves to provide multi-point support for the glass pieces after they fall off.

[0031] Furthermore, the ultra-thin glass is a large-format glass. In the system of the present invention, an adapter is further included. The keel of the lower bracket extends vertically downward along the boundaries of the plurality of grids in the center to form a slot plate. The slot plates are enclosed to form a rectangular frame shape. A circle of annular grooves is provided on the front of the adapter, and the slot plate is plugged into the annular groove. A rectangular groove is provided on the back of the adapter, and the mobile platform is embedded in the rectangular groove.

[0032] The lower side of the keel of the upper bracket protrudes to form a reinforcing rib, and the upper and lower sides of the keel of the upper bracket both protrude to form a reinforcing rib, and the surface of the reinforcing rib is provided with a pattern that increases friction.

[0033] The method and system for processing a chamfered glass sheet based on ultra-thin glass of the present invention have the following beneficial effects: the present invention performs laser modification through a profiling beam to form a modified contour surface consistent with the side contour and chamfer shape of the desired glass sheet, and then places the modified ultra-thin glass in an etching solution and applies ultrasonic waves, so that the glass sheet automatically falls off the ultra-thin glass based on gravity. Compared with the existing scheme, the method has good flexibility and can adapt to the processing requirements of glass of various shapes and structures; the processing process is flexible and controllable; the edge quality is good, and high-precision processing is performed, which is more suitable for hard and brittle materials such as ultra-thin glass, reduces stress concentration during processing, and avoids material breakage; it is environmentally friendly and pollution-free, reduces consumables, and also reduces production costs;

[0034] Furthermore, the present invention can also form a drainage groove extending into the interior of the glass until it is close to the modified contour surface by laser grooving before etching, and use the drainage groove to introduce the etching liquid into the interior of the glass, accelerate the removal of the modified contour surface by etching, and improve processing efficiency; the glass bracket can be used to realize large-format glass batch processing of glass sheets, and, in conjunction with the hollow groove body, an independent small groove can be provided for each glass sheet to avoid overlapping, and a number of earplug-shaped support columns are provided at the bottom of the small groove to provide multi-point support for the glass sheet after it falls off, so that the glass sheet can be removed conveniently by using a vacuum suction pen without damaging the glass sheet. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below. Obviously, the drawings in the following description are only embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on the provided drawings without creative work:

[0036] Figure 1 This is a flow chart of a method for processing a chamfered glass sheet based on ultra-thin glass according to Embodiment 1 of the present invention;

[0037] Figure 2This is a process principle diagram of a method for processing a chamfered glass sheet based on ultra-thin glass according to Embodiment 1 of the present invention;

[0038] Figure 3 is a metallographic diagram of two types of chamfers after modification in Example 1;

[0039] Figure 4 is a cross-sectional metallographic diagram of the first embodiment after the fragment is split;

[0040] Figure 5 This is a schematic diagram of silicates in the gap during etching;

[0041] Figure 6 is a flow chart of a method for processing a chamfered glass sheet based on ultra-thin glass according to a second embodiment of the present invention;

[0042] Figure 7 This is a schematic diagram of the location of the drainage slot;

[0043] Figure 8 This is the schematic diagram of the laser grooving process;

[0044] Fig. 9 This is a schematic diagram of the process of clamping large-format glass using a glass bracket in Example 3;

[0045] Fig.10 It is a schematic diagram of the keel and its reinforcing ribs of the upper bracket;

[0046] Fig.11 It is a schematic diagram of the assembly process of the glass bracket as a laser cutting jig;

[0047] Fig.12 It is a schematic diagram of the structure of the adapter;

[0048] Fig.13 is a schematic diagram of the processing process of embodiment 3;

[0049] Fig.14 It is a schematic diagram of the process of changing the glass bracket to be loaded into the hollow tank to form a liquid polishing fixture;

[0050] Fig.15 It is a schematic diagram of the structure of the small slot of the hollow slot body and the supporting columns inside it;

[0051] Fig.16 This is a schematic diagram of the composition of the laser equipment. DETAILED DESCRIPTION

[0052] In order to facilitate the 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 on 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.

[0053] Embodiment 1

[0054] refer to Figure 1 The method for processing a chamfered glass sheet based on ultra-thin glass of the present invention is used to process at least one glass sheet having the same thickness as the ultra-thin glass and having a chamfer on the ultra-thin glass. The method mainly comprises:

[0055] Laser modification step S100: using a laser profiling beam to perform laser modification on the ultra-thin glass, so as to form a modified contour surface inside the ultra-thin glass that is consistent with the side contour and chamfer shape of the desired glass sheet. Figure 2 In the figure, 1 represents the ultra-thin glass UTG, and the dotted line 3 represents the modified contour surface. The material within the modified contour surface is the desired glass sheet 2, that is, the target product. 5 represents a support block, which is used to support the ultra-thin glass. The support position is the waste material 6. The waste material 6 refers to the material outside the modified contour surface, that is, the material other than the glass sheet 2 to be finally obtained. The laser profiling beam is to imitate the side contour and chamfer shape of the target product. The profiling beam is projected vertically onto the ultra-thin glass.

[0056] Static breaking step S200: placing the modified ultra-thin glass in an etching solution and applying ultrasonic waves to the etching solution, waiting for the glass sheet to automatically fall off from the ultra-thin glass due to gravity. Figure 2 In the figure, the arrow indicates that the glass sheet 2 falls off naturally due to gravity, and the arrow 4 indicates the penetration path of the etching solution. The mechanical force generated by ultrasound can make the crack expand along the modified contour surface.

[0057] The present invention uses a profiling beam to modify the ultra-thin glass, and by precisely controlling the shape, energy distribution and processing path of the laser beam, it can meet the requirements of glass sheets 2 with various side profiles and chamfered shapes, and achieve precise chamfering of the edge of the UTG ultra-thin glass. Then, chemical etching combined with ultrasonic waves is used to automatically remove the target product from the large UTG, and finally the target product is taken out for other processing. Therefore, the present invention can achieve efficient, high-precision and damage-free glass sheet processing.

[0058] The above steps are described in detail below.

[0059] Laser modification step S100:

[0060] The side profile of a glass piece refers to the profile surface between the front and back sides of the glass piece. The side profile can have various shapes. The chamfer after laser modification can be in different shapes (such as C-shaped, V-shaped, trapezoidal, etc., refer to Figure 3 , Figure 3 (a) and (b) in the figure respectively show the C-shaped and V-shaped chamfers obtained by the modification of this embodiment. Generally, the chamfers include a middle straight edge portion and chamfered portions located at both ends of the two straight edges, and this embodiment is such a chamfer.

[0061] refer to Figure 2 The modified contour surface is a completely shaped edge shape of the glass sheet (which can be understood as actually the side contour and chamfer shape of the glass sheet). It is formed by projecting a large number of focal points onto the UTG. The energy of these focal points is configured to act on the UTG to achieve only a modified effect. These focal points are closely distributed to form a curved surface that is consistent with the side contour and chamfer shape of the glass sheet. This curved surface can be understood as a modified contour surface. Therefore, the corresponding focus distribution (i.e., the position of each focus) and energy distribution (i.e., the energy of each focus) can be designed according to the side contour and chamfer requirements of the target product. In this way, the embodiments of the present invention can meet the needs of glass sheets of various shapes and their chamfers.

[0062] The specific implementation method of the modification is not limited. For example, it can be projected one by one; it can also be that all the focuses are formed together to form a beam and projected at one time; it can also be a beam scanning composed of several focuses. Taking the beam scanning composed of several focuses as an example, a profiling beam with a profile shape consistent with the side profile of the glass sheet and the longitudinal section of the chamfered shape (the longitudinal section can also be understood as a section parallel to the thickness direction of the UTG) is first generated. The profiling beam contains multiple focuses distributed along the side profile of the glass sheet and the longitudinal section profile of the chamfer. A larger number of focuses can better control the straight edge and chamfer shape of the side profile, forming a profile surface closer to the side profile of the target product; then, the profiling beam is moved along the route corresponding to the side profile of the glass sheet to obtain the modified profile surface. For example, if the target product is a rectangular sheet, the profiling beam will move a rectangular circle. If the target product is a round sheet, the profiling beam will move a circular circle. Of course, it can be understood that the circle here refers to the relative motion effect, which can be achieved by fixing the UTG and moving the beam, or by fixing the beam and moving the UTG. Generally, the latter is adopted.

[0063] In order to facilitate subsequent accelerated etching, the first focus and the last focus of the shaped light beam fall on the front and back sides of the UTG respectively, so that during subsequent etching, the etching liquid can be etched synchronously from the front and back sides of the glass along the modified contour surface.

[0064] Theoretically, there is no special requirement for the energy of the multiple focal points of the profiling beam, as long as the purpose of modification can be achieved. In order to improve the processing efficiency and the processing accuracy of the chamfer, the energy of the focus can be adjusted according to whether the focus is located in the chamfer or the middle straight edge. For example, the energy of the focus located in the chamfer part among the multiple focal points of the profiling beam is generally less than the energy of the focus located in the middle straight edge part, that is, the energy of the focus in the middle straight edge part is high, and it can be designed to be able to split with only a little etching.

[0065] The energy and speed parameters during laser modification need to ensure that the heat generated by the laser on the subsurface is sufficient to melt the glass without damaging the glass subsurface. Use appropriate laser energy and cutting speed so that the heat generated by the laser on the subsurface is sufficient to melt the material and form the required chamfered shape while avoiding excessive heat damage to the surface. In actual implementation, multiple trial cuts are required to determine the best parameter combination. During the laser chamfering process, the real-time monitoring system of the processing equipment is used to observe possible problems during the processing, such as laser focus offset, material deformation, etc., and the processing is immediately suspended for adjustment if necessary.

[0066] Static splitting step S200:

[0067] Etching is also called chemical polishing. The chemical liquid used in chemical polishing is either an acidic solution or an alkaline solution, depending on the processing requirements and the chemical composition of the glass. In this embodiment, the etching environment is a high temperature strong alkali. During the etching process, the etching liquid etches through the modified contour surface and penetrates into the interior of the glass. The etching time needs to be determined based on the glass material and the concentration and temperature of the chemical etching solution, or by simple observation. After all the target glass pieces fall off naturally, they can be taken out. In this step, you only need to wait for the target product to fall off naturally. Figure 4 A cross section after the split is shown, with white representing the target product and black being the background.

[0068] Due to the ultra-thin and fragile nature of UTG glass, traditional chemical etching methods are not applicable (traditional chemical etching methods are bubbling and throwing). It must be pure static liquid throwing, and the liquid cannot be disturbed (to prevent glass breakage). In this embodiment, ultrasonic equipment is configured in the etching liquid. Chemical etching combined with ultrasound can achieve micron-level processing accuracy, which is suitable for precision processing of hard and brittle materials such as glass. The vibration of ultrasound can accelerate the chemical reaction and accelerate the diffusion of silicates generated in the laser-modified gaps into the liquid (the silicates generated by the reaction of glass and strong alkali are highly viscous, adhere to the glass surface, isolate the strong alkali, and hinder the chemical reaction of the glass) to prevent silicates from blocking the contact between the solution and the glass and affecting the chemical reaction. Silicates in the gaps, such as Figure 5 The white part pointed by the arrow in the middle; and the mechanical force generated by the ultrasound makes the crack expand along the laser modified shape, accelerating the cracking. In this way, this embodiment can significantly improve the processing efficiency. Compared with the traditional mechanical processing method, chemical etching combined with ultrasound does not require a large amount of cutting fluid and coolant, reducing energy consumption and environmental pollution; and laser modification combined with ultrasound combined with chemical etching is suitable for glass processing needs of various shapes and structures, including planes, curved surfaces, complex three-dimensional structures, etc.

[0069] As mentioned above, this embodiment has the following beneficial effects:

[0070] (1) Good flexibility: The laser beam is easy to control and adjust, and can adapt to the processing needs of glass of various shapes and structures.

[0071] (2) Good edge quality: The edges produced by laser etching are smooth and burr-free, which improves the processing quality.

[0072] (3) High-precision processing: Chemical etching combined with ultrasound can achieve micron-level processing accuracy, which is very rare in the field of glass processing. Traditional mechanical cutting or grinding methods often find it difficult to achieve such high precision, and although laser processing can also achieve high precision, it may be limited when processing complex shapes or structures. Chemical etching combined with ultrasound can flexibly respond to glass processing needs of various shapes and structures while maintaining high precision.

[0073] (4) Good processing effect on hard and brittle materials: Glass is a typical hard and brittle material. Traditional processing methods are often ineffective in processing such materials and are prone to cause material breakage or damage. Chemical etching combined with ultrasound can solve this problem well. Ultrasonic vibration can evenly disperse the cutting force and reduce stress concentration during the cutting process, thereby avoiding material breakage. At the same time, chemical etchants can also react chemically with the glass surface, making the material easier to remove.

[0074] (5) Flexible and controllable processing: The processing of chemical etching combined with ultrasound is very flexible and controllable. By adjusting the frequency and amplitude of ultrasound and the type and concentration of chemical etching agents, the material removal rate and shape accuracy during the processing can be precisely controlled.

[0075] (6) Environmental protection, no pollution and reduced consumables: Chemical etching combined with ultrasonic processing does not require the use of large amounts of cutting fluid or coolant, nor does it require the generation of harmful environments such as high temperature or high pressure. At the same time, the selection and use of chemical etchants can also follow environmental protection principles, and select etchants that are harmless or low in harm to the environment.

[0076] (7) High cost-effectiveness: Since there is no need to use a large amount of consumables such as cutting fluid or coolant during the processing, the production cost is also reduced.

[0077] Embodiment 2

[0078] This embodiment is based on the first embodiment. Figure 6 In this embodiment, a laser grooving step S120 is inserted between the laser modification step and the static splitting step. The purpose is to allow the etching liquid to directly and quickly penetrate into the interior of the glass, and the modified contour surface cannot be touched during grooving to avoid damaging the target product shape.

[0079] Laser grooving step S120: laser grooving is performed in an area outside the modified contour surface and close to the chamfer using a laser to form a drainage groove extending into the interior of the ultra-thin glass. The drainage groove extends close to the modified contour surface, so that in the subsequent static cracking step S200, the etching liquid can directly penetrate into the glass through the drainage groove to etch the modified contour surface. Since the etching speed is determined by the glass material and the concentration and temperature of the solution, the present invention can accelerate the etching speed by using the grooving method without changing these liquid polishing conditions.

[0080] refer to Figure 7 In this step, laser grooving is performed on the waste material using a laser to form a drainage groove 7 extending into the interior of the UTG until it is close to the modified contour surface. The closeness here means that the distance between the blind end of the drainage groove and the modified contour surface is very small, so small that when the glass is placed in the etching solution, the etching solution can etch the drainage groove to connect with the modified contour surface in a very short time t. Assuming that the time to wait for the glass sheet to fall off naturally in the etching step is T, the time t is much less than the etching time T, for example, t is less than 0.1T.

[0081] Specifically, the drainage groove is recessed along the thickness direction of the ultra-thin glass, including an annular groove opened on the front of the ultra-thin glass and surrounding the modified contour surface, and an annular groove opened on the back of the ultra-thin glass and surrounding the modified contour surface. The recessed depth depth of the annular groove is equivalent to the depth of the chamfer corresponding to it (equivalent here means that the depth error of the two is within an acceptable empirical error range), and the shape of the drainage groove is the same as the side contour of the glass sheet, and the size is slightly larger than the size of the side contour of the glass sheet. It can also be understood that the blind end of the annular groove is near the inflection point of the chamfer and the straight edge of the side contour of the glass sheet. Assuming that the etching time finally waited in step S200 is T, the shortest distance between the blind end of the drainage groove and the modified contour surface is small enough to make the time t required for the etching liquid to etch the drainage groove to the modified contour surface much less than T, for example, t is less than 0.1T.

[0082] There is no restriction on the laser grooving method. Figure 8 , the following provides a specific laser grooving method:

[0083] First, control the focus of the laser beam 8 (a Gaussian beam is used here) so that the focus is on the back of the UTG. The laser beam passes through the UTG to ablate the glass on its back, and the laser beam moves along the route corresponding to the side contour of the glass sheet. For example, if the target product is a rectangular sheet, the profiling beam will move a rectangular circle. If the target product is a round sheet, the profiling beam will move a circular circle. Of course, it can be understood that, as with the laser modification step, moving a circle here also refers to the relative motion effect. By moving the focus up multiple times and then continuing to move in circles, a circle of annular grooves that meets the depth requirement (i.e., the depth is depth) is finally formed;

[0084] Then, the focus of the laser beam is controlled so that the focus is on the front side of the UTG. The laser beam ablates the glass on the front side of the UTG, and the laser beam moves along the route corresponding to the side contour of the glass sheet in a circle. After moving the focus down multiple times, it continues to move in a circle to finally form a circle of annular grooves that meet the depth requirements.

[0085] By adopting the above-mentioned groove opening method, the groove opening depth can be flexibly controlled to match different etching schemes.

[0086] Embodiment 3

[0087] When the ultra-thin glass is a large-format UTG and a large number of target products need to be processed from the large-format UTG, it is generally necessary to cut the large piece into small pieces, first cut a large number of rectangular pieces from the large-format UTG, and then process the rectangular pieces one by one to obtain the target products. In order to improve efficiency and reliability, this embodiment continues to optimize on the basis of embodiment 1, and there is no need to perform the step of cutting large pieces into small pieces, which can significantly improve processing efficiency and processing quality, and reduce scrap rate, manpower, machine energy consumption and rework rate.

[0088] Specifically, this embodiment performs a large-format glass clamping step before the laser modification step: the ultra-thin glass is clamped by a glass bracket. In the subsequent laser modification step, the entire glass bracket is mounted on a mobile platform, and the mobile platform is controlled to move with the glass bracket according to a pre-set processing path, so that the multiple processing areas are processed one by one to form the modified contour surface; in the static splitting step, the entire glass bracket is placed in an etching solution.

[0089] refer to Fig. 9 , the glass bracket 9 uses 904 stainless steel, PEEK or Teflon and other high temperature and alkali resistant materials. The glass bracket 9 specifically includes an upper bracket 901 and a lower bracket 902. The upper bracket is embedded in the lower bracket (it can be matched with some elastic parts such as clips or wrapped with rubber bands to fix the upper bracket and the lower bracket), and the upper bracket and the lower bracket are both equipped with grid-like keels, and the number and plane size of the grids of the keel of the upper bracket and the keel of the lower bracket are the same and aligned one by one. The large-format UTG 10 is placed flat between the keel of the upper bracket and the keel of the lower bracket. The area where the large-format UTG 10 falls between each two grids facing each other is a processing area, and each of the processing areas is used to process a piece of the glass sheet.

[0090] The glass holder adopts a keel design to provide keel support for large pieces of UTG glass, which is convenient for handling and processing (anti-scratch, anti-fragmentation). It can solve the problems of poor stability, insufficient load-bearing capacity and poor portability in the existing technology of handling UTG glass, reduce scratches caused by contact with the fixture, and reduce the process of taking the glass out of the transport rack and putting it on the fixture, so as to reduce processing steps, reduce the error rate of human operation and reduce the fragmentation rate.

[0091] Preferably, the lower side of the keel of the upper bracket protrudes to form a reinforcing rib, and the keel of the upper bracket protrudes to form reinforcing ribs 900 on both upper and lower sides of its entire length, such as Fig.10As shown. Adding reinforcing ribs can enhance the strength and rigidity of the transport frame, so that the glass bracket can bear a larger weight and is suitable for transporting large-sized or thick UTG glass. Further preferably, the surface of the reinforcing ribs is provided with textures that increase friction, so that friction is enhanced by increasing the surface roughness to prevent the glass from sliding in the bracket and causing bumps. In addition, the front and back sides of the upper bracket keel have the same reinforcing ribs with textures, so both sides can be used. The upper bracket has such a fool-proof design that there is no need to distinguish between the front and back sides.

[0092] In addition to being used for UTG transportation, the glass holder can also be used as a laser cutting jig. Fig.11 The keel of the lower bracket extends vertically downward along the boundaries of several grids in the center to form a slot plate 13. The slot plate encloses a rectangular frame shape, and its center coincides with the center of the lower bracket. The depth of the space enclosed by the slot plate is relatively small. The slot plate is embedded in the adapter, and the adapter 11 is fixed on the mobile platform 12. In this way, the glass bracket equipped with a large-format UTG can be directly installed on the mobile platform and the UTG can be laser processed. After the laser processing is completed, the glass bracket of this embodiment can be removed, and then the designed liquid polishing fixture can be used to achieve the splitting.

[0093] refer to Fig.12 As shown in (a), the front side of the adapter faces upward, and a circle of annular groove 1101 is opened near the edge, and the card slot plate of the lower bracket is just inserted into the annular groove; as shown in (b), the back side of the adapter faces downward, and a rectangular groove 1102 is opened, and the mobile platform is just embedded in the rectangular groove. The center of the rectangular groove and the annular groove coincide. The flatness of the contact plane between the adapter, the laser equipment mobile platform and the lower bracket should be less than 40um.

[0094] refer to Fig.13 , the processing process of this embodiment is as follows:

[0095] 1) Use the designed glass holder to load and remove UTG glass;

[0096] 2) Install the glass holder with UTG glass on the X / Y mobile device of the laser equipment through the adapter, set the laser parameters and processing path, and perform laser chamfering preprocessing.

[0097] 3) Remove the glass holder with UTG glass (glass with laser modified area inside), install it on the liquid etching box, immerse it in etching solution, and wait for the target glass to fall off naturally from the large piece and fall into the liquid etching box.

[0098] 4) Take out the glass, clean it, and proceed to other processes.

[0099] As described above, the UTG glass bracket with keel support in this embodiment has the following beneficial effects:

[0100] 1) Improve stability: The keel support structure provides a stable support for the UTG glass, effectively preventing shaking and tilting during transportation.

[0101] 2) Enhanced load-bearing capacity: The keel and buffer layer design made of high-strength lightweight materials enables the transport frame to withstand a large weight and is suitable for transporting UTG glass of large size or thickness.

[0102] 3) Improve portability: Lightweight design and foldable or detachable structure make the transport rack easier to carry and store, reducing transportation costs.

[0103] 4) Ensure safety: ensure safety and stability during transportation and reduce the risk of glass damage.

[0104] 5) Due to the ultra-thin thickness and brittleness of UTG glass, this embodiment eliminates the step of splitting large pieces into small pieces, which can reduce the breakage rate during transportation or other operations and improve the processing yield. In addition, batch transportation, batch laser pretreatment and batch liquid polishing can be directly implemented on large pieces of glass, significantly improving processing efficiency.

[0105] Embodiment 4

[0106] Further preferably, the glass holder can be used as a liquid polishing fixture in addition to being used for UTG transportation and as a laser cutting fixture. Fig.14 In the static splitting step S200, the glass bracket is loaded into the hollow tank body, and then the hollow tank body is placed flat in the etching tank. The glass bracket and the hollow tank body form a liquid throwing device, and the flatness of the contact part is less than 1mm, so as to prevent the bracket from shaking greatly on the tank body.

[0107] The hollow trough body is made of high temperature and alkali resistant materials such as 904 stainless steel, PEEK or Teflon. Lifting ears can be added to the outside of the trough body to facilitate manual handling or machine lifting. A basket structure can also be used to place the device in the basket for lifting. The inside of the hollow trough body is divided into multiple small grooves. Hollow holes are set on the side walls of the hollow trough body and the partitions between the small grooves. The number and plane size of the small grooves are the same as the number and plane size of the grids of the lower bracket keel. A number of earplug-shaped support columns are set at the bottom of the small groove to provide multi-point support for the glass piece after it falls off. Fig.15 In this way, after the glass sheet falls off, the glass sheet can be taken out by using a vacuum suction pen.

[0108] The advantages of this embodiment are as follows:

[0109] 1) In this embodiment Fig. 9 On the basis of the glass holder, a hollow trough is added at the bottom of the glass holder to receive the UTG cracks after they fall off, so that the trough can be immersed in the etching solution conveniently, and when the trough is taken out, the etching liquid can quickly seep out to cooperate with the cracking method of the present invention. It is also convenient to collect and take out the finished UTG glass after the cracks fall off. The method is efficient and stable, and is conducive to mass production.

[0110] 2) The hollow trough body is composed of multiple small grooves. Each small groove is separated to prevent overlapping when multiple pieces of target glass fall to the bottom of the trough. Each small groove only holds one piece of target glass.

[0111] 3) A number of earplug-shaped support columns are arranged at the bottom of each small groove inside the hollow groove body to support the target glass and facilitate the removal of the target glass. If there are no support columns, the glass will fall on the bottom of the groove in surface-to-surface contact. After liquid polishing, the tension of a small amount of liquid at the bottom of the groove will firmly suck the target glass, making it difficult to remove. Adding support columns can achieve surface-to-point contact, reduce the contact area, and then use a vacuum suction pen to remove the target glass.

[0112] The operation process of this embodiment is as follows:

[0113] (1) Pretreatment: Clean and dry the large-format UTG to remove surface stains and moisture to ensure smooth laser processing;

[0114] (2) Loading the large-format UTG onto the glass holder;

[0115] (3) Loading the glass holder with the large-format UTG onto the mobile platform of the laser equipment;

[0116] (4) Laser parameter setting: according to the material, thickness and chamfering requirements of UTG, set appropriate laser power, wavelength, pulse frequency and scanning speed;

[0117] (5) Laser focusing and positioning: Using a high-precision laser focusing system and positioning system, the laser beam is accurately focused on the edge of the UTG glass and precisely positioned;

[0118] (6) Laser modification pretreatment: Start the laser system so that the laser beam scans the UTG according to the preset path and speed to form a smooth chamfered modified shape;

[0119] (7) After laser pretreatment, the glass bracket is disassembled as a whole and loaded onto the hollow tank body to form a liquid-throwing device, the entire liquid-throwing device is immersed in the etching liquid, and the ultrasonic wave is turned on to perform the etching reaction;

[0120] (8) After etching, remove the liquid polishing device, then remove the glass bracket, and take out the target product from each small groove of the hollow groove body;

[0121] (9) Post-processing: Clean and inspect the target product after processing to ensure that the quality of the chamfer meets the requirements.

[0122] Embodiment 5

[0123] This embodiment relates to a system for processing chamfered glass sheets based on ultra-thin glass, which is used to implement the above method embodiment. The system includes a laser device, an etching tank with an ultrasonic device inside, a glass bracket, a hollow tank body, etc. Fig.16 The laser device includes a laser, a 1 / 2 wave plate, a beam control unit, and a reflector. The beam control unit can be a Bessel cutting head, a DOE (diffractive optical element) lens, and a spatial light modulator SLM (spatial light modulator). It is also equipped with a 50x focusing objective lens. The process of beam generation belongs to conventional technology and will not be introduced in depth. Other system components can refer to the aforementioned method embodiment part and will not be repeated here.

[0124] In summary, the embodiments of the present invention can efficiently process the chamfers of large-format UTG glass. By controlling the shape, energy distribution and processing path of the laser beam, precise chamfering and modification of the edge of the UTG ultra-thin glass can be achieved. After modification, ultrasonic waves combined with chemical etching are used. After a certain period of time, combined with the gravity of the target product itself, the target product is automatically removed from the large piece into a specific groove. Finally, the target product is taken out and other processes are performed. Compared with existing solutions, it has good flexibility and can adapt to the processing needs of glass of various shapes and structures; the processing process is flexible and controllable; the edge quality is good, and high-precision processing is performed, which is more suitable for hard and brittle materials such as ultra-thin glass, reducing stress concentration during processing and avoiding material breakage; it is environmentally friendly and pollution-free, reduces consumables, and also reduces production costs. Moreover, before etching, the embodiment of the present invention can form a drainage groove extending into the interior of the glass until it is close to the modified contour surface through laser grooving, and then use the drainage groove to introduce the etching liquid into the interior of the glass, accelerate the removal of the modified contour surface through etching, and improve the processing efficiency; in addition, the embodiment of the present invention also provides a multifunctional UTG glass holder, which can be carried, used as a laser cutting jig, and used as a liquid polishing jig. The glass holder adopts a keel design to provide keel support for large-format UTG glass, which is convenient for carrying and processing (anti-scratch, anti-fragmentation), and combined with the designed empty slot body to achieve fragmentation, it can greatly improve the processing efficiency of large-format UTG.

[0125] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0126] 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 the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0127] 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 modes, which are merely illustrative rather than 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 within the protection of the present invention.

Claims

1. A method for processing a chamfered glass sheet based on ultra-thin glass, used for processing at least one glass sheet with a chamfer on the ultra-thin glass, characterized in that: The method comprises: Laser modification step: performing laser modification on the ultra-thin glass using a laser profiling beam to form a modified contour surface inside the ultra-thin glass that is consistent with the side contour and chamfer shape of the desired glass sheet, and the material within the modified contour surface is the desired glass sheet; Static breaking step: placing the modified ultra-thin glass in an etching solution and applying ultrasonic waves to the etching solution, waiting for the glass sheet to automatically fall off from the ultra-thin glass due to gravity.

2. The method for processing a chamfered glass sheet based on ultra-thin glass according to claim 1, characterized in that: The ultra-thin glass is a large-format glass, and the method further comprises: Large-format glass clamping steps: clamping the ultra-thin glass using a glass bracket; The glass bracket comprises an upper bracket and a lower bracket, the upper bracket is embedded in the lower bracket, and the upper bracket and the lower bracket are both provided with a grid-shaped keel, and the number and plane size of the grids of the keel of the upper bracket and the keel of the lower bracket are the same and aligned one by one, the ultra-thin glass is placed flat between the keel of the upper bracket and the keel of the lower bracket, and the area where the ultra-thin glass falls between every two grids facing each other is a processing area, and each of the processing areas is used to process a piece of the glass sheet; Among them, in the laser modification step, the entire glass holder is installed on a mobile platform, and the mobile platform is controlled to move with the glass holder according to a pre-set processing path, so that multiple processing areas are processed one by one to form the modified contour surface; in the static splitting step, the entire glass holder is placed in an etching solution.

3. The method for processing a chamfered glass sheet based on ultra-thin glass according to claim 2, characterized in that: In the static splitting step, the glass bracket is loaded into the hollow tank body, and then the hollow tank body is placed flat in the etching tank; The hollow trough body is divided into multiple small troughs, and hollow holes are arranged on the surrounding side walls of the hollow trough body and the partitions between the small troughs. The number and plane size of the small troughs are the same as the number and plane size of the lattices of the lower bracket keel. A plurality of earplug-shaped support columns are vertically arranged at the bottom of the small trough to provide multi-point support for the glass sheet after it falls off. The method further comprises taking out the glass sheet by using a vacuum pen after the glass sheet falls off.

4. The method for processing a chamfered glass sheet based on ultra-thin glass according to claim 1, characterized in that: The method further comprises: Laser grooving step: using a laser to perform a laser grooving process in an area outside the modified contour surface and close to the chamfer to form a drainage groove extending into the interior of the ultra-thin glass; The laser grooving step is between the laser modification step and the static splitting step, so that in the static splitting step, the etching liquid penetrates into the drainage groove and etches to the modified contour surface and then etches along the modified contour surface.

5. The method for processing a chamfered glass sheet based on ultra-thin glass according to claim 4, characterized in that: The drainage groove includes an annular groove opened on the front side of the ultra-thin glass and surrounding the modified contour surface, or / and an annular groove opened on the back side of the ultra-thin glass and surrounding the modified contour surface.

6. The method for processing a chamfered glass sheet based on ultra-thin glass according to claim 5, characterized in that: The drainage groove is recessed along the thickness direction of the ultra-thin glass; the recessed depth of the drainage groove is equivalent to the depth of the corresponding chamfer; the shape of the drainage groove is the same as the side profile of the glass sheet, and the size is slightly larger than the size of the side profile of the glass sheet.

7. The method for processing a chamfered glass sheet based on ultra-thin glass according to claim 1, characterized in that: The laser modification step specifically includes: generating a profiling beam, the profiling beam comprising a plurality of focal points distributed along the side profile of the glass sheet and the longitudinal profile of the chamfer; and making the profiling beam travel along a route corresponding to the side profile of the glass sheet to obtain the modified profile surface.

8. The method for processing a chamfered glass sheet based on ultra-thin glass according to claim 7, characterized in that: Among the multiple focal points of the shaped light beam: the energy of the focal point located at the chamfered portion of the glass sheet is less than the energy of the focal point located at the middle portion of the side edge profile of the glass sheet; The first focus and the last focus of the shaped light beam fall on the front side and the back side of the ultra-thin glass respectively.

9. A system for processing a chamfered glass sheet based on ultra-thin glass, used to perform the method according to any one of claims 1 to 8, characterized in that: The system includes: a laser device, an etching tank with an ultrasonic device inside, a glass bracket, and a hollow tank body; The glass bracket comprises an upper bracket and a lower bracket, the upper bracket is embedded in the lower bracket, and the upper bracket and the lower bracket are both provided with a grid-shaped keel, and the number and plane size of the grids of the keel of the upper bracket and the keel of the lower bracket are the same and aligned one by one, the ultra-thin glass is placed flat between the keel of the upper bracket and the keel of the lower bracket, and the area where the ultra-thin glass falls between every two grids facing each other is a processing area, and each of the processing areas is used to process a piece of the glass sheet; Among them, the interior of the hollow trough body is divided into multiple small grooves, and hollow holes are set on the four side walls of the hollow trough body and the partitions between the small grooves. The number and plane size of the small grooves are the same as the number and plane size of the grids of the lower bracket keel. Several earplug-shaped support columns are set at the bottom of the small grooves to provide multi-point support for the glass pieces after they fall off.

10. The system for processing a chamfered glass sheet based on ultra-thin glass according to claim 9, characterized in that: It also includes an adapter, wherein the keel of the lower bracket extends vertically downward along the boundaries of a plurality of grids in the center to form a slot plate, and the slot plate is enclosed to form a rectangular frame shape, and a circle of annular grooves is provided on the front side of the adapter, and the slot plate is inserted into the annular groove; a rectangular groove is provided on the back side of the adapter, and the mobile platform is embedded in the rectangular groove; The lower side of the keel of the upper bracket protrudes to form a reinforcing rib, and the upper and lower sides of the keel of the upper bracket both protrude to form a reinforcing rib, and the surface of the reinforcing rib is provided with a pattern that increases friction.

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