The rapid development of flat panel display industry increases the demands of the thinner and strengthened glass substrates, which also increases the difficulty of cutting glass substrates. The use of traditional cutting wheel to cut chemical strengthened glass plates normally leads to severe defects including radial and lateral cracks, debris and chips.
The purpose of this study is to investigate the influence of cutting pressure and cutting speed on the medium, lateral and radial cracks in cutting chemical strengthened glass using tooth scribing wheel. The results show that the greater cutting forces, can produce greater elastic stress field, making the medium crack depth extended deeper. Increasing the cutting speed may restrict the extension of medium crack, but it favors reducing the lateral cracks and chipping defects. There is a narrow process window for scribing strengthened glass plates allowing glass plated to be separated automatically with acceptable lateral and radial cracks.
Keywords: scribing wheel, Chemical strengthened glass, Median crack, Lateral crack
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