Method for laser polishing of glass and polishing processing method of glass hole and glass sheet

A technology of laser polishing and processing method, which is applied in the field of glass sheet polishing, laser polishing glass, and glass holes, can solve the problems of fragmentation caused by surface defects, processing quality description of non-hole walls, and high energy, so as to improve the mechanical properties of glass, The effect of solving micro-cracks on the cut surface and solving the risk of fragmentation

Active Publication Date: 2021-02-26
KORNERSTONE MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The conventional method of using pulsed laser to process through holes is to use the high energy of the pulsed laser spot to irradiate the glass to remove the material in the focus area, and to move the spot to make the irradiation area stack and accumulate to form a complete hole shape, because the side wall is composed of the spot stack. Therefore, there is an uneven microstructure. In addition, the pulse laser has a large peak power and high energy, which will cause microcracks inside the glass.
If the processed side is not polished, after the subsequent chemical strengthening, its surface defects may be affected by the internal stress of the glass, which may cause fragmentation, and there is also a risk of fragmentation in the subsequent ball drop performance test and long-term use.
[0005] Chinese patent application CN107520545A: A laser drilling method, which discloses the method of using UV laser to process holes on PCB boards, but does not explain the quality of the hole wall and the improvement method
The existing patent does not specify the processing quality of the hole wall, nor does it further deal with the cracks and depressions in the hole wall after processing

Method used

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  • Method for laser polishing of glass and polishing processing method of glass hole and glass sheet
  • Method for laser polishing of glass and polishing processing method of glass hole and glass sheet
  • Method for laser polishing of glass and polishing processing method of glass hole and glass sheet

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Embodiment 1

[0045] The polishing process of embodiment 1 glass hole may further comprise the steps:

[0046] 1. Use the first laser (green laser, wavelength 532nm) to irradiate the cutting outline of the preset through hole on the glass (thickness <0.2mm), and the glass is broken along the cutting outline;

[0047] 2. Use the second laser (CO 2 Continuous laser, wavelength 10.6um, power 45-55W, spot size 10um) from the first starting point of the cut through hole to the second starting point on the polishing contour line of the glass in an arc line, and irradiate along the polishing contour line , so that the glass on both sides of the polishing contour line is evaporated to obtain a polished glass hole; the cutting contour line and the polishing contour line are concentric circles; the difference between the radius of the concentric circles is 0.5mm; as figure 1 as shown,

[0048] in CO 2 When the continuous laser is irradiated on a certain place on the polishing contour line, the las...

Embodiment 2

[0049] The polishing processing of embodiment 2 glass flakes

[0050] Proceed as follows:

[0051] 1. Use infrared laser (pulse width of picosecond level, wavelength of 1064mm, repetition frequency of 100kHz, average power of infrared laser source of 40-50W, 6-8 repetition pulses per group, spot diameter of 3um) in a thickness of 0.1mm The high-alumina glass is irradiated along the cutting contour line of the preset glass sheet, and cracks are generated on the cutting contour line;

[0052] 2. Use infrared laser (pulse width of picosecond level, wavelength of 1064mm, repetition frequency of 100kHz, average power of infrared laser source of 40-50W, each group of repeated pulses 6-8, spot diameter of 3um) to irradiate the cutting contour of the glass sheet Outer lobes and cracks in the lobes;

[0053] The split line is 0.7-1.0 mm from the outer edge of the glass to the nearest cutting contour line; the extension line of the split line forms an angle of 30-40° with the first cu...

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Abstract

The invention provides a method for laser polishing of glass and a polishing processing method of a glass hole and a glass sheet. The method comprises the following steps of: irradiating a cutting contour line arranged on a glass plate by adopting first laser, and then cutting off the glass along the cutting contour line; and irradiating along a polishing contour line which is 0.3-1.2mm close to the cutting contour line by adopting second laser, and evaporating the glass on the two sides of the polishing contour line to obtain a polished glass product, wherein the second laser is CO2 continuous laser. According to the method, the defects of micro-cracks of a section caused by a conventional cutting mode can be overcome; the polishing contour line is directly irradiated by the CO2 continuous laser, so that glass bodies on the two sides of the polishing contour line are evaporated and removed, a smooth glass side section is obtained, and the mechanical property of the glass is improved;and the method can be applied to edge treatment of glass drilling, inner contour and outer contour, the plane quality of the side surface is optimized, and the potential fragment risk of the subsequent process is solved.

Description

technical field [0001] The invention relates to a glass processing method, in particular to a laser polishing glass method and a polishing processing method for glass holes and glass flakes. Background technique [0002] Glass material is one of the commonly used materials for electronic display devices at present, and is mainly used to make display panels, rear cover covers, etc. Conventional glass cover processing is to use a large size of glass raw material to produce a glass cover through cutting, polishing, hot bending, chemical strengthening and other processes. Among them, the cutting process, the commonly used processing methods are CNC processing and laser cutting processing. CNC processing technology has been developed for a long time, the technology is very mature, and the equipment price is relatively low, which is suitable for mass production. However, CNC processing also has some disadvantages, such as cutting fluid contamination of the glass needs to be clea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/352C03B33/08
CPCB23K26/3576C03B33/082Y02P40/57
Inventor 张维炜林威廷兰有成
Owner KORNERSTONE MATERIALS TECH
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