Method for cutting glass by laser

A laser cutting and glass technology, which is applied in glass manufacturing equipment, glass cutting devices, manufacturing tools, etc., can solve the problems of low efficiency and achieve the effect of fast and high-quality cutting

Inactive Publication Date: 2009-12-30
HANS LASER TECH IND GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] After the laser is generated, there is an existing method of using green laser or ultraviolet laser to cut shallow grooves on the glass surface and then repeat scanning to cut off. This method is extremely inefficient

Method used

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  • Method for cutting glass by laser
  • Method for cutting glass by laser
  • Method for cutting glass by laser

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Embodiment Construction

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] The method for laser cutting glass of the present invention adopts a Q-switched pulsed ultraviolet laser with a wavelength of 355nm or a Q-switched pulsed green laser with a wavelength of 532nm, and the processing material has a low absorption rate for the ultraviolet laser or the green laser and is easy to penetrate glass, or Transparent, fragile, hard materials like glass, and this method is suitable for cutting straight lines and large radius curves. However, the energy density of the laser near the focal point is extremely high, and it is easy to exceed the damage threshold of the material so that the material absorbs enough energy to cause the material to produce tiny burst points. The laser chooses a laser with high pulse single-point energy and narrow pulse width, so that it can have a larger peak power and it is easier to exceed the process...

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Abstract

A method for cutting glass by laser comprises the following steps: (A) a laser focus is arranged on the lower surface of the glass; (B) laser beams form a cut surface in the glass; (C) with a machined surface ascending, the focus of the whole laser beams also ascends relative to the machined glass. In the invention, a bursting point is generated in the glass by the laser focus, the focus energy exceeds the damage threshold of the glass, the glass absorbs the laser energy to generate high temperature and points are burst on the glass and form the cut surface through a moving system, thus realizing fast and high-quality cutting of the glass.

Description

【Technical field】 [0001] The invention relates to a method for laser cutting glass. 【Background technique】 [0002] The biggest disadvantage of the traditional mechanical cutting method is the need to reprocess the processed edges and the resulting low yield. [0003] In mechanical cutting, an abrasive or mechanical wheel is used to score the glass, creating tangential tension along the cutting direction, causing the glass to crack along the scratch. The edge cut by this method is not smooth, has tiny cracks, residual asymmetric edge stress on the material, and residual debris. For many applications, microcracks caused by debris and localized stress will cause device failure, so post-cut edge grinding and / or polishing, or even heat treatment, is necessary to strengthen the edge. In addition, auxiliary agents are needed to assist cutting in mechanical wheel processing, and auxiliary agents may also stick to the edge of the finished product, requiring subsequent treatments s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03B33/09
Inventor 高云峰杨锦彬刘义军李斌张善基贺建明
Owner HANS LASER TECH IND GRP CO LTD
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