中国激光, 2008, 35 (s1): 193, 网络出版: 2008-04-21
安瓿瓶激光封口
Sealing Glass Ampoule by CO2 Laser
摘要
为了实现CO2激光封口安瓿瓶,提出了对CO2激光预热后的安瓿瓶,再利用CO2激光使安瓿瓶熔融封口的技术方案。在考虑玻璃物性参量随温度变化和安瓿瓶表面对流换热的情况下,利用有限元软件(ANSYS)对CO2激光辐照不同规格和转速的安瓿瓶的温度场和应力场进行数值计算。结果表明在加工参量相同的情况下,安瓿瓶瓶壁越厚,激光加热时所达到的温度越低。当CO2激光加热旋转的安瓿瓶时, 不同的旋转速度只是使得外表面温度以不同周期上升, 但如果激光加热时间相同, 则温升基本相同。对封口过程中的应力场进行了计算,结果表明导致安瓿瓶封口失败的热应力主要是冷却时的张应力。
Abstract
The technology of sealing glass ampoule by preheating, melting and sealing by CO2 laser was presented in this paper. The ANSYS software was used to simulate the temperature and thermal stress distributions considering the influences of surface convection and the variation of the physical properties of the glass with temperatures. The relationships between temperature and the thickness and rotating velocity of the ampoule were obtained. The results show that the surface temperature decreases with the increase of thickness; the temperature of the outer surface will reach almost the same value at different rotating velocities, if the laser interaction time is the same. The main cause of the ampoule broken is the tensile stress during the cooling.
唐文龙, 王新兵, 黄余, 焦俊科. 安瓿瓶激光封口[J]. 中国激光, 2008, 35(s1): 193. Tang Wenlong, Wang Xinbing, Huang Yu, Jiao Junke. Sealing Glass Ampoule by CO2 Laser[J]. Chinese Journal of Lasers, 2008, 35(s1): 193.