Method for splitting glass by nanosecond laser

• Main Authors: HUANG YU, RONG YOUMIN, HU MING, FAN XINHU, ZHANG GUOJUN
• Format: Patent
• Language: Chinese; English
• Published: 08.03.2022
• Subjects: CHEMISTRY; GLASS; MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES; METALLURGY; MINERAL OR SLAG WOOL

The invention relates to the field of material laser processing technology, in particular to a nanosecond laser glass splitting method which comprises the following steps: forming an initial damaged surface: focusing a laser beam on a transparent glass workpiece, and generating irreversible crack damage and residual stress in the transparent glass workpiece through the laser beam to form the initial damaged surface; each pulse of the laser beam can generate a single slender irreversible initial damage, and the laser beam is controlled to form an initial damage surface on the transparent glass workpiece along a scanning track; induction of initial damage expansion: scanning again along the scanning track in the step 1 by using a carbon dioxide laser beam, inducing cracks of the initial damage surface to expand under the action of residual stress through heating, gradually expanding and connecting discontinuous single damage in the initial damage surface to form macroscopic gaps, and forming the initial damage