热烈法玻璃激光切割技术综述
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Laser scribe and break is a two stage process and is quite similar to traditional
mechanical scribe and break method. In the first stage, partially penetrating holes or deep vents at depths of onethird to one-half of the material thickness are produced using a laser. In the second stage, breaking by applying a mechanical force takes place normally with the help of vacuum chucks or by crack rollers. Several studies have been done to improve this method and the cutting quality. However, the scribing and breaking process incurs damage to the cut edge and causes damage to the glass surface. Therefore, finishing processes are required, which add extra cost to the manufacturer.
As compared with laser scribe and break and laser melting and evaporation
method, the controlled fracture technique is a single stage process in which cutting is performed below the glass transition temperature Tg, which results in smooth edges and hence requires no further cleaning or grinding. Unlike the conventional cutting technique, it is a clean process without chips and coolant and it is possible to fix the workpiece on a table by a simple method because no external forces act upon it.
Typical Experiments&Leabharlann Baiduesults
In 2008 Koji Yamamoto et. al. conduct a three-dementational thermal analysis on laser scribing of
induce local residual tensile stresses. If these stresses exceed the failure stress σf given by the critical strain energy release rate σGc
for glass, crack propagates.
Introduction
In the controlled fracture technique, the cracks are initiated due
to absorbed photons heating up the material. The stresses near the laser spot are compressive due to high temperature. After the passage of the laser beam, these compressive stresses relax and
Review：The Influence Of Laser Scribing&Cutting Conditions In Glass Cutting
LeeHang Class：134 No:2111302042 Instructor:Baoym
Introduction
Different techniques of cutting glass using laser exists such as laser scribe
and break, laser melting and evaporation, and the controlled fracture technique from which some are being used in industries and some are still in their developmental stages.
Introduction
In laser melting and evaporation method, cutting is done above glass
transition temperatureTg, which results in poor surface finish and heat affected zones. Due to melting and vaporization of the glass material during cutting, microcracks and burrs are generated along the cutting profile and the requirement of grinding and polishing at the end of the process becomes inevitable.
mechanical scribe and break method. In the first stage, partially penetrating holes or deep vents at depths of onethird to one-half of the material thickness are produced using a laser. In the second stage, breaking by applying a mechanical force takes place normally with the help of vacuum chucks or by crack rollers. Several studies have been done to improve this method and the cutting quality. However, the scribing and breaking process incurs damage to the cut edge and causes damage to the glass surface. Therefore, finishing processes are required, which add extra cost to the manufacturer.
As compared with laser scribe and break and laser melting and evaporation
method, the controlled fracture technique is a single stage process in which cutting is performed below the glass transition temperature Tg, which results in smooth edges and hence requires no further cleaning or grinding. Unlike the conventional cutting technique, it is a clean process without chips and coolant and it is possible to fix the workpiece on a table by a simple method because no external forces act upon it.
Typical Experiments&Leabharlann Baiduesults
In 2008 Koji Yamamoto et. al. conduct a three-dementational thermal analysis on laser scribing of
induce local residual tensile stresses. If these stresses exceed the failure stress σf given by the critical strain energy release rate σGc
for glass, crack propagates.
Introduction
In the controlled fracture technique, the cracks are initiated due
to absorbed photons heating up the material. The stresses near the laser spot are compressive due to high temperature. After the passage of the laser beam, these compressive stresses relax and
Review：The Influence Of Laser Scribing&Cutting Conditions In Glass Cutting
LeeHang Class：134 No:2111302042 Instructor:Baoym
Introduction
Different techniques of cutting glass using laser exists such as laser scribe
and break, laser melting and evaporation, and the controlled fracture technique from which some are being used in industries and some are still in their developmental stages.
Introduction
In laser melting and evaporation method, cutting is done above glass
transition temperatureTg, which results in poor surface finish and heat affected zones. Due to melting and vaporization of the glass material during cutting, microcracks and burrs are generated along the cutting profile and the requirement of grinding and polishing at the end of the process becomes inevitable.