采用双光束CO_2激光的玻璃切割过程数值模拟

Numerical simulation of cutting glass with double-beam CO_2-laser

采用双光束CO2激光的玻璃切割技术对平板显示器进行切割.分析了较大热应力产生的区域,建立了运动坐标系下的双光束CO2激光的玻璃切割过程传热数学模型,并对单、双光束激光的玻璃切割过程进行热应力数值模拟.计算结果表明,采用双光束CO2激光切割方法使热影响区域的温度场更加均匀,温度梯度减小,应力减小,可以有效地避免不可控裂纹的产生.提出的采用双光束激光的玻璃切割方法为工程应用提供了新的参考.

A new method of glass cutting with double-beam CO2-Iaser has been advanced in this paper. The heat transfer mathematical model in moving coordinate of glass cutting with double-beam CO2-Iaser has been set up by analyzing the zone where there is large stress. Later, numerical simulations are performed to explore the effect of single and double-beam CO2-Iaser on the glass cutting. The results indicate that, by adopting the method of double-beam CO：laser cutting glass, the temperature profiles in the heat effected zone are more uniform, temperature gradients and the stress are less and the are also more uniform, which can effectively avoid the cracks witch come into existence out of control. The method of glass cutting with double-beam CO2-Iaser provides a new reference to the engineering design.