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

A processing method and technology of glass flakes, which are applied in the polishing process of glass flakes, laser polishing glass, and glass holes, can solve problems such as fragments caused by surface defects, quality instructions for unfinished hole wall processing, and glass microcracks, etc., to improve glass mechanics. performance, solve micro-cracks on cut surface, and optimize the effect of plane quality

Active Publication Date: 2022-08-09
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 glass and polishing method for glass hole and glass sheet
  • Method for laser polishing glass and polishing method for glass hole and glass sheet
  • Method for laser polishing glass and polishing method for glass hole and glass sheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The polishing process of the glass hole of embodiment 1, comprises the following steps:

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

[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 with an arc line, and irradiating along the polishing contour line , so that the glass on both sides of the polishing contour line evaporates to obtain polished glass holes; the cutting contour line and the polishing contour line are concentric circles; the difference between the radii of the concentric circles is 0.5mm; figure 1 shown,

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

Embodiment 2

[0049] Example 2 Polishing of glass sheet

[0050] Proceed as follows:

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

[0052] 2. Use infrared laser (pulse width is picosecond level, wavelength is 1064mm, repetition frequency is 100kHz, average power of infrared laser source is 40-50W, each group of repeated pulses is 6-8, spot diameter is 3um) to irradiate the cutting profile of the glass sheet The lobe line on the outside, and make the lobe line crack;

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

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Abstract

The invention provides a method of laser polishing glass and the polishing method of glass holes and glass sheets.Including the following steps: After the first laser is used to expose the cutting contour set on the glass plate, the glass is disconnected along the cut contour line; the second laser edge near the cut contour line of 0.3‑1.2mm to illuminate,Make the glass on both sides of the polishing contour evaporation and get polished glass products; the second laser is CO 2 Continuous laser.The present invention can solve the slight cracks and defects caused by the cut surface caused by conventional cutting methods; 2 Continuous laser directly illuminate the polishing contour line, so that the vitreous body evaporation and removal of the polishing contour lines on both sides of the outline, obtain a smooth glass side broken surface to improve the performance of glass mechanics;The quality of the plane solves the potential risk of subsequent processes.

Description

technical field [0001] The invention relates to a glass processing method, in particular to a method for laser polishing glass and a method for polishing glass holes and glass sheets. Background technique [0002] Glass material is one of the materials commonly used in electronic display devices at present, and is mainly used to make display panels, back covers, and the like. Conventional glass cover processing is to use large-sized glass raw materials to produce glass cover after cutting, polishing, hot bending, chemical strengthening and other processes. Among them, the commonly used processing methods are CNC processing and laser cutting processing. CNC machining 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 machining also has some shortcomings, such as cutting fluid contamination of the glass, which needs to be cleaned, and rough edges need to ...

Claims

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Application Information

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