CO_(2)激光作用玻璃管的热效应

Thermal effect of CO_(2) laser on glass tubes

激光对单一玻璃管进行热熔封接的过程中,加工质量与玻璃管内的温度分布有密不可分的联系。在考虑表面热辐射、材料内部热传导和空气热对流的情况下,使用COMSOL Multiphysics有限元仿真软件对CO_(2)激光作用高硼硅酸盐玻璃管的温度场进行模拟仿真,分析了温度场分布随时间的变化规律,比较了激光功率、激光光斑半径和旋转速度对玻璃管温度分布的影响。仿真结果表明,激光功率越大,光斑半径越小,玻璃管旋转速度越低,玻璃管温度越高。根据仿真结果,选择合适的加工参数能够达到高硼硅酸盐玻璃管进行激光加工的工艺要求,此项研究为后续玻璃管激光热熔封接的工艺参数选择提供了重要理论依据。

In the process of laser heat fusion sealing of a single glass tube,the quality of processing is inextricably linked to the temperature distribution inside the tube.Under the consideration of surface heat radiation,internal heat conduction of material and air heat convection,the finite element simulation software,which called COMSOL Multiphysics was adopted to carry out simulation of the temperature field of high borosilicate glass tube under the action of CO_(2) laser,the change rule of the temperature field distribution with time was analyzed,and the effects of laser power,laser spot radius and rotation speed on the temperature distribution of the glass tube were compared.Simulation results show that the higher the laser power,the smaller the spot radius,the lower the rotational speed of the glass tube,and the higher the temperature of the glass tube.According to the simulation results,the process requirements of laser processing of high borosilicate glass tube can be achieved by selecting suitable processing parameters.This study provides an important theoretical basis for the selection of process parameters of subsequent glass tube laser hot fusion sealing.