Do You Know What Is Laser Cutting Thin Glass Technology?

Nov. 12, 2018

Nowadays, the quality requirement of Frosted Glass is getting higher and higher. In addition to considering different material characteristics, processing technology must also achieve more precise, detailed and pure processing results. Innovative laser cutting technology has become the standard of glass cutting in many industries. In the increasingly demanding market such as electronics, there is an urgent need for glass cutting innovative technology.

The traditional glass cutting method, which uses cemented carbide or diamond cutter, is widely used in many applications. Its cutting process is divided into two steps. First, the glass is cracked on the surface of the glass by diamond knife point or carbide grinding wheel; then, the second step is to use mechanical means to separate the glass along the crack line.

However, there are some defects in the method of carving and cutting. Removal of materials will lead to debris, fragments and micro-cracks, which will reduce the strength of the cutting edge, thus requiring another cleaning process. The deep cracks caused by this process are usually not perpendicular to the glass surface, because the splitting lines generated by mechanical forces are generally not perpendicular. Moreover, mechanical forces acting on thin glass yield losses are also a negative factor.

These defects can be improved by using stress-free glass and further optimizing the tools used for segmentation. However, it is still impossible to avoid the systemic contradiction between vertical cutting lines and the prevention of edge debris/cracks. The development of China Frosted Glass Supplierlaser technology has brought solutions to these quality problems.

Laser scribing and segmentation

Unlike traditional mechanical cutting tools, the energy of laser beam cuts glass in a non-contact way. The energy is used to heat the specified part of the workpiece so that it reaches a pre-defined temperature. The rapid heating process is followed by rapid cooling, which results in a vertical stress band in the glass, in which a crack without debris or crack appears. Because cracks are produced only by heating, not by mechanical reasons, there will be no debris and microcracks. Therefore, the intensity of laser cutting edge is stronger than that of traditional cutting and segmentation. The need for finishing has also been reduced or not needed at all. In addition, the occurrence of glass fragments can be completely avoided.

For laser marking, under the action of laser beam heating and subsequent cooling process, a depth of about 10 mm (about 10% of glass thickness) is drawn on the glass surface. Glass can then be segmented along the direction of scratching. Because this technology does not produce any glass fragments, the common rough edges and low strength of cutting edges are also avoided, and subsequent polishing and grinding processes are no longer needed. More importantly, the glass processed by this method has a crushing resistance of up to three times as high as that of the glass partitioned by traditional methods. For glass between 5 mm and 1 mm in thickness, it is possible to complete the whole cutting in only one step.

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