WO2022141807A1

WO2022141807A1 - Curved-surface thick glass cutting and splitting method and system

Info

Publication number: WO2022141807A1
Application number: PCT/CN2021/080974
Authority: WO
Inventors: 王建刚; 张义; 廖建成; 万景成; 陈龙; 朱熠
Original assignee: 武汉华工激光工程有限责任公司
Priority date: 2020-12-29
Filing date: 2021-03-16
Publication date: 2022-07-07
Also published as: CN112846530A

Abstract

A curved-surface thick glass cutting and splitting method, comprising the following steps: S1, fixing, by using a positioning mechanism, the position of curved-surface thick glass to be cut; S2, modulating the parameters of processing laser light and ensuring that the laser light used for processing can be perpendicularly incident onto said curved-surface thick glass, and at the same time modulating motion parameters in a cutting process; S3, driving, by using a motion platform, the positioning mechanism to move according to the modulated motion parameters, and at the same time starting a laser to emit laser light according to the modulated parameters of the processing laser light, so as to cut out a cutting trace on said curved-surface thick glass; S4, placing the curved-surface thick glass on which the cutting trace is cut into a heating device for heating; S5, placing the heated curved-surface thick glass into a cooling device for cooling, and automatically splitting the curved-surface thick glass along the cutting trace. Also provided is a curved-surface thick glass cutting and splitting system. The problem of cutting edge convex corner caused by conventional cutting is solved, and the instability of manual breaking is reduced.

Description

Curved thick glass cutting and splitting method and system

technical field

The invention relates to the technical field of laser cutting, in particular to a method and system for cutting and slicing curved thick glass.

Background technique

Glass is an amorphous inorganic non-metallic material with excellent properties such as high light transmittance, high hardness and light weight. It is widely used in many industries of the national economy, such as electronic products, displays, automobiles, biomedical equipment, etc. Micron-scale optical filters, as large as large glass panels in the automotive and construction industries.

The traditional glass processing method mainly uses a diamond tip or a carbide grinding wheel to generate a crack on the surface of the glass, and then uses a mechanical method to split the glass along the crack line. Glass is a typical brittle material, and the dividing lines generated by mechanical force are generally not vertical, so that the micro-cracks formed by the process are generally not vertical to the glass surface, which reduces the reliability and yield of the device. The common ultra-thin diamond grinding wheel cutting technology has a moderate cost and a wide range of applications. There is coolant and debris pollution during processing, and the wear of the grinding wheel blade reduces the yield. However, the conventional short-pulse melt gasification integral cutting method has a large heat-affected zone, and there are large microcracks, residual stress, and defects in the recast layer.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a method and system for cutting and splitting thick curved glass, which can at least solve some of the defects in the prior art.

In order to achieve the above purpose, the embodiments of the present invention provide the following technical solutions: a method for cutting and splitting a curved thick glass, comprising the following steps:

S1, using a positioning mechanism to fix the position of the curved thick glass to be cut;

S2, modulate the parameters of the processing laser and ensure that the laser used for processing can shoot vertically on the curved thick glass to be cut, and at the same time modulate the motion parameters during the cutting process;

S3, adopts the motion platform to drive the described positioning mechanism to move according to the modulated motion parameters, and simultaneously starts the laser to emit laser light according to the modulated parameters of the processing laser, so as to cut the cutting marks on the curved surface thick glass to be cut;

S4, put the curved thick glass with cut marks into the heating device for heating;

S5, put the heated curved thick glass into a cooling device for cooling, and the curved thick glass will automatically crack along the cutting marks.

Further, in the step S1, the positioning mechanism is a vacuum adsorption fixture, and the curved thick glass is fixed in the form of vacuum adsorption.

Further, in the step S2, the specific method of modulation is: according to the actual size of the product, use solidworks or UG to make a 3D graphic of the product, when using UG software to process the graphics, outline the cutting route and process it into an NC file, and finally Use the self-made cutting software to code the NC file; edit the polyline processing template in the software editing interface, set the laser parameters, so that the single pulse energy density of the laser should be 100-600uJ/cm ² , the laser frequency should meet the 100kHZ-200MHz, and the burat should be at Between 2 and 10, edit the motion parameters of the template in the cutting process and the motion parameters in the processing process, including the motion starting point and motion speed of the motion platform. The processing speed is 100mm/s, and the pso point spacing facility is 5um. The jump speed is 0.2G.

Further, in the step S3, when cutting, an air jet device is used to eject air flow to blow away dust residues.

Further, in the step S4, the heating device is preheated to 150° C., and then the processed sample is placed in the heating device.

Further, the standing time is 1 to 3 minutes.

Further, in the step S5, the cooling device used is a spray device, and the temperature is lowered by spray treatment.

Further, before preparing the curved thick glass to be cut, wipe the surface of the sample with alcohol or put the sample into an ultrasonic cleaner for cleaning.

Further, an optical component is used to make the laser light emitted by the laser irradiate perpendicularly to the curved thick glass to be cut.

The embodiment of the present invention provides another technical solution: a curved thick glass cutting and splitting system, including a laser, a positioning mechanism for fixing the curved thick glass to be cut, and a vertical beam for making the laser emitted to the to-be-cut thick glass. Optical assembly of the cut curved thick glass, a motion platform for moving with the positioning mechanism, a heating device for heating the curved thick glass with cut marks, and a cooling device for cooling the heated curved thick glass .

Compared with the prior art, the beneficial effects of the present invention are:

1. The convex angle of the cutting edge caused by traditional cutting is solved, and the instability of manual manual breaking of materials is reduced.

2. Solve the problems of dust pollution generated during processing.

3. The device meets the requirements of cutting 0.4-3.5mm thick glass and the integration of slivers.

Description of drawings

1 is a schematic diagram of a curved thick glass cutting and splitting system provided by an embodiment of the present invention;

In the reference numerals: 1-laser; 2-folding mirror; 3-beam expander; 4-cutting head; 5-cutting head position regulator; 6-jet equipment; 7-workpiece; 8-positioning mechanism; 9-movement platform.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Referring to FIG. 1 , an embodiment of the present invention provides a method for cutting and splitting a curved thick glass, which includes the following steps: S1 , using a positioning mechanism to fix the position of the curved thick glass to be cut; S2 , modulate the parameters of the processing laser and ensure that The laser used for processing can be perpendicular to the curved thick glass to be cut, and the motion parameters during the cutting process are modulated; S3, a motion platform is used to drive the positioning mechanism to move according to the modulated motion parameters, and the laser is simultaneously activated The laser is emitted according to the parameters of the modulated processing laser to cut cutting marks on the curved thick glass to be cut; S4, the curved thick glass with cutting marks is put into the heating device for heating; S5, after heating The curved thick glass is cooled in a cooling device, and the curved thick glass will automatically crack along the cutting marks. In this embodiment, the curved thick glass is cut by laser. Compared with the existing traditional cutting method, the convex angle of the cutting edge caused by traditional cutting is solved, and there is no need to manually break the material, which reduces the need for manual breaking. instability. Specifically, the position of the curved thick glass to be cut is fixed first, and a positioning mechanism can be used to position it, and then the parameters and motion parameters of the processing laser are adjusted. Of course, these two steps can also be reversed or performed simultaneously. After the modulation is completed, it is ready to start processing. According to these two parameters, the laser and the motion platform are controlled respectively, so as to accurately cut the curved thick glass to be cut. After the cutting is completed, the curved thick glass is sent to a heating device for heating, and then placed in a cooling device for cooling, and the curved thick glass can be automatically cracked along the cutting marks. The whole process does not need to be manually operated, and a production line can be set up. The production line includes multiple stations, which are conveyed in the form of transmission. The first station is the cutting station, the second station is the heating station, and the third station is the heating station. The first position is the cooling station, and the processed curved thick glass is sequentially conveyed by the conveyor belt according to the direction of the three stations. The cutting head is used for cutting, and the position of the cutting head is fine-tuned by the cutting head position adjuster. Preferably, the method satisfies the integration of cutting 0.4-3.5 mm thick glass and slivers.

The following are specific examples:

As an optimized solution of the embodiment of the present invention, please refer to FIG. 1. In the step S1, the positioning mechanism is a vacuum adsorption fixture, and the curved thick glass is fixed by vacuum adsorption. In this embodiment, the curved thick glass is fixed in the form of vacuum adsorption, which will not stain the curved thick glass, and the fixing is firm. Preferably, a dial indicator is used to check and adjust the overall levelness of the positioning mechanism to ensure the consistency of the processed samples.

As an optimization scheme of the embodiment of the present invention, please refer to FIG. 1. In the step S2, the specific method of modulation is: according to the actual size of the product, solidworks or UG is used to make a 3D graphic of the product, and when the graphic is processed by UG software , outline the cutting route and process it into an NC file, and finally use the self-made cutting software to code the NC file; edit the polyline processing template in the software editing interface, and set the laser parameters, so that the single-pulse energy density of the laser needs to be 100-600uJ/ cm ² , the laser frequency meets 100kHZ-200MHz, and the burat is between 2 and 10. Edit the motion parameters of the template during the cutting process and the motion parameters during the processing process, including the motion starting point and motion speed of the motion platform, and the processing speed. It is 100mm/s, the pso point spacing facility is 5um, and the jump speed is 0.2G. In this embodiment, the parameters modulated in this way will be in accordance with the actual situation and can achieve the best cutting effect.

As an optimized solution of the embodiment of the present invention, please refer to FIG. 1. In the step S3, during cutting, an air jet device is used to eject air flow to blow away dust residues. In this embodiment, when cutting, an air jet is used to eject air flow, which solves the problems of dust pollution generated during processing. Preferably, the air jet device can control the size of the air flow at the outlet by adjusting the air valve, so that it can blow away the dust residue without moving the processing sample fixed on the positioning mechanism.

As an optimized solution of the embodiment of the present invention, in the step S4, the heating device is preheated to 150° C., and then the processed sample is placed in the heating device. In this embodiment, the heating efficiency can be improved by preheating the heating device to 150°C. So that only 1 to 3 minutes can be placed.

As an optimized solution of the embodiment of the present invention, in the step S5, the cooling device used is a spray device, and the temperature is lowered by spray treatment. In this embodiment, the temperature is lowered by means of water cooling, and the temperature is controlled at normal temperature (25° C.), which can achieve a good splitting effect.

As an optimized solution of the embodiment of the present invention, before preparing the curved thick glass to be cut, first wipe the surface of the sample with alcohol or put the sample into an ultrasonic cleaning machine for cleaning. In this embodiment, cleaning is performed before processing to ensure that the surface of the sample is free of contamination that affects the penetration of the laser beam.

As an optimized solution of the embodiment of the present invention, please refer to FIG. 1 , an optical component is used to make the laser emitted by the laser irradiate vertically on the curved thick glass to be cut. In this embodiment, the optical assembly includes a folding mirror and a beam expander. The folding mirror is a reflection mirror, and there are multiple mirrors for reflecting the laser light and changing the transmission direction of the laser light.

Referring to FIG. 1, an embodiment of the present invention provides a curved thick glass cutting and slicing system, including a laser, a positioning mechanism for fixing the curved thick glass to be cut, and a laser beam to shoot vertically to the curved curved surface to be cut. An optical component for thick glass, a moving platform for moving with the positioning mechanism, a heating device for heating the curved thick glass with cutting marks, and a cooling device for cooling the heated curved thick glass. In this embodiment, the curved thick glass is cut by laser. Compared with the existing traditional cutting method, the convex angle of the cutting edge caused by traditional cutting is solved, and there is no need to manually break the material, which reduces the need for manual breaking. instability. Specifically, the position of the curved thick glass to be cut is fixed first, and a positioning mechanism can be used to position it, and then the parameters and motion parameters of the processing laser are adjusted. Of course, these two steps can also be reversed or performed simultaneously. After the modulation is completed, it is ready to start processing. According to these two parameters, the laser and the motion platform are controlled respectively, so as to accurately cut the curved thick glass to be cut. After the cutting is completed, the curved thick glass is sent to a heating device for heating, and then placed in a cooling device for cooling, and the curved thick glass can be automatically cracked along the cutting marks. The whole process does not need to be manually operated, and a production line can be set up. The production line includes multiple stations, which are conveyed in the form of transmission. The first station is the cutting station, the second station is the heating station, and the third station is the heating station. The first position is the cooling station, and the processed curved thick glass is sequentially conveyed by the conveyor belt according to the direction of the three stations. The cutting head is used for cutting, and the position of the cutting head is fine-tuned by the cutting head position adjuster. Preferably, the method satisfies the integration of cutting 0.4-3.5 mm thick glass and slivers.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, and substitutions can be made in these embodiments without departing from the principle and spirit of the invention and modifications, the scope of the present invention is defined by the appended claims and their equivalents.

Claims

A method for cutting and slicing curved thick glass, characterized in that it comprises the following steps:

S1, using a positioning mechanism to fix the position of the curved thick glass to be cut;

S2, modulate the parameters of the processing laser and ensure that the laser used for processing can shoot vertically on the curved thick glass to be cut, and at the same time modulate the motion parameters during the cutting process;

S3, use a motion platform to drive the positioning mechanism to move according to the modulated motion parameters, and simultaneously start the laser to emit laser light according to the modulated parameters of the processing laser, so as to cut cutting marks on the curved thick glass to be cut;

S4, put the curved thick glass with cut marks into the heating device for heating;

S5, put the heated curved thick glass into a cooling device for cooling, and the curved thick glass will automatically crack along the cutting marks.
The method for cutting and splitting a curved thick glass according to claim 1, wherein in the step S1, the positioning mechanism is a vacuum adsorption fixture, and the curved thick glass is fixed in the form of vacuum adsorption.
The method for cutting and slicing curved thick glass according to claim 1, characterized in that, in the step S2, the specific modulating method is: according to the actual size of the product, solidworks or UG is used to make the 3D graphics of the product, and the UG is used to make the 3D graphics of the product. When the software processes graphics, it outlines the cutting route and processes it into NC files, and finally uses self-made cutting software to code the NC files; edit the polyline processing template in the software editing interface, and set the laser parameters, so that the single-pulse energy density of the laser needs to be At 100-600uJ/cm 2 , the laser frequency meets 100kHZ-200MHz, and the burat is between 2 and 10. Edit the motion parameters of the template during the cutting process and the motion parameters during the processing process, including the motion starting point of the motion platform and The movement speed, the processing speed is 100mm/s, the pso point spacing facility is 5um, and the jump speed is 0.2G.
The method for cutting and splitting thick curved glass according to claim 1, characterized in that: in the step S3, when cutting, an air jet device is used to eject air flow to blow away dust residues.
The method for cutting and splitting thick curved glass according to claim 1, characterized in that: in the step S4, the heating device is preheated to 150°C, and then the processed sample is placed in the heating device.
The method for cutting and slicing thick curved glass according to claim 5, characterized in that the placing time is 1-3 minutes.
The method for cutting and splitting curved thick glass according to claim 1, wherein in the step S5, the cooling device used is a spray device, and the temperature is lowered by spray treatment.
The method for cutting and splitting curved thick glass according to claim 1, wherein before preparing the curved thick glass to be cut, the surface of the sample is wiped with alcohol or the sample is placed in an ultrasonic cleaner for cleaning.
The method for cutting and slicing thick curved glass according to claim 1, characterized in that: an optical component is used to make the laser emitted by the laser irradiate vertically on the thick curved glass to be cut.
A curved thick glass cutting and slicing system, comprising a laser, characterized in that it further comprises a positioning mechanism for fixing the curved thick glass to be cut, an optical system for making the laser emitted by the laser shoot vertically to the curved thick glass to be cut An assembly, a moving platform for moving with the positioning mechanism, a heating device for heating the curved thick glass with cut marks, and a cooling device for cooling the heated curved thick glass.