How to Cut Glass Using a Laser
A laser beam and glass product technology, applied in glass manufacturing equipment, laser welding equipment, glass cutting devices, etc., can solve problems such as scribing and separating glass pieces, increasing the scrap rate, and spontaneous glass breaking
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Embodiment 1
[0072] refer to Figure 9 , an unstrengthened glass article 390 is processed according to the method described above. An unstrengthened glass article 390 (with no central tension) having a thickness of 0.63 mm was positioned and secured beneath a laser producing a 532 nm laser beam at a pulse frequency of 30 kHz. The beam waist BW of the laser beam is centered at a location below the second surface 396 and outside the glass article 390 . The laser is translated relative to the glass sheet at a scribing speed of 300 mm / s (ie, the translation speed of the laser). The laser forms a plurality of defects 394 that extend from a second surface 396 of the glass article 390 and are non-orthogonal to the first surface 398 and the second surface 396 of the glass article 390 . As indicated by arrow LB, defect 394 is deflected in the direction of translation of the laser beam. In general, defect 394 extends through the thickness of the glass sheet. However, because defects 394 are loca...
Embodiment 2
[0074] Figure 10 A strengthened glass article 490 processed according to the method described above is shown. A strengthened glass article 490 with a thickness of 0.7 mm and a central tension of 45 MPa was mounted below the laser, which produced a laser beam of 532 nm and a pulse frequency of 80 kHz. Strengthened glass article 490 has compressive surface layer 411 at first surface 498 and second surface 496 . The center of the beam waist BW of the laser beam is positioned below the second surface 496 and outside of the strengthened glass article 490 . The laser was translated relative to strengthened glass article 490 at a scribing speed of 950 mm / sec. The laser forms a plurality of defects 494 extending from a second surface 496 of strengthened glass article 490 and non-orthogonal to first surface 498 and second surface 496 of strengthened glass article 490 . As indicated by arrow LB, defect 494 is deflected in the direction of translation of the laser beam. Defect 494 e...
Embodiment 3
[0076] Figure 11 A strengthened glass article 590 processed according to the method described above is shown. A strengthened glass article 590 with a thickness of 1.1 mm and a central tension of 29 MPa was mounted below the laser, which produced a laser beam of 532 nm and a pulse frequency of 80 kHz. Strengthened glass article 590 has compressive surface layer 511 at first surface 598 and second surface 596 . The center of the beam waist BW of the laser beam is positioned below the second surface 596 and outside of the strengthened glass article 590 . The laser was translated relative to the strengthened glass article 590 at a scribing speed of 800 mm / sec. The laser forms a plurality of defects 594 extending from second surface 596 of strengthened glass article 590 and non-orthogonal to first surface 598 and second surface 596 of strengthened glass article 590 . As indicated by arrow LB, defect 594 is deflected in the direction of translation of the laser beam. Defect 594...
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