Thermal effect of CO2 laser on glass tubes
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摘要:
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CO2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。
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关键词:
- 激光加工技术 /
- CO2激光 /
- 温度场 /
- COMSOL Multiphysics /
- 高硼硅酸盐玻璃管
Abstract: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 CO2 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.
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图 1 CO2激光玻璃管加工系统示意图
Figure 1. Schematic diagram of CO2 laser processing glass tube system
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图 4 激光加工高硼硅酸盐玻璃管有限元模型
Figure 4. Finite element model of laser-processed high borosilicate glass tubes
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图 5 CO2激光辐照高硼硅酸盐玻璃的温度场仿真图
Figure 5. Temperature field simulation diagram of CO2 laser irradiated high borosilicate glass
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图 6 CO2激光作用下玻璃管不同位置的温度随时间的变化规律
Figure 6. Temperature change law of different positions of glass tube with time under CO2 laser action
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图 7 高硼硅酸盐玻璃管在不同激光功率 CO2激光作用下的表面温度分布
Figure 7. Surface temperature distributions of high borosilicate glass tubes under action of CO2 laser with different laser powers
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图 8 高硼硅酸盐玻璃管在不同激光功率 CO2激光作用下表面温度随时间的变化规律
Figure 8. Change law of surface temperature of high borosilicate glass tube with time under action of CO2 laser with different laser powers
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图 9 高硼硅酸盐玻璃管在不同光斑半径 CO2激光作用下的表面温度分布规律
Figure 9. Surface temperature distribution law of high borosilicate glass tubes under action of CO2 laser with different laser spot radii
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图 10 高硼硅酸盐玻璃管在不同光斑半径 CO2激光作用下的径向温度分布规律
Figure 10. Radial temperature distribution law of high borosilicate glass tubes under action of CO2 laser with different laser spot radii
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图 11 不同旋转速度的玻璃管在CO2激光作用下的表面温度分布规律
Figure 11. Surface temperature distribution law of glass tubes with different rotational speeds under action of CO2 laser
表 1 高硼硅酸盐玻璃的主要成分
Table 1 Main components of high borosilicate glass
% SiO2 B2O3 Al2O3 Na2O CaO BaO 81 12～13 2～3 4 0～2 0～2 
下载: 导出CSV
表 2 高硼硅酸盐玻璃的主要物理参数
Table 2 Main physical parameters of high borosilicate glass
Young's modulus
/GpaConstant pressure heat capacity/
（J·kg−1·K−1）Poisson
ratioLinear expansivity/
(1/℃)Density/
(g·cm−1)Heat transfer rate/
（W·m−1·K−1）64 1 0.22 4% 2.23 1.2
下载: 导出CSV
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