摘要
为了研究聚合物的激光熔融塑化效果,在分析CO2激光对聚合物的光热作用基础上,建立激光融化聚合物理论模型,依据能量守恒和热物理原理,计算推导了激光参数与温度变化的数学关系表达式,并以CO2激光融化典型聚合物为例,数值计算和实验分析激光参数对融化深度的影响。结果表明:聚合物呈现出浅表面融化和深度融化两种特征,选择合适激光参数能够实现由表及里的聚合物整体融化,理论计算的融化深度与实验测量结果较为吻合,利用所建立的理论模型及其相关分析公式,可为探索CO2激光辐照的聚合物塑化成型加工提供理论依据。
In order to investigate the influence of laser energy on the melting and plasticizing process,a theoretical model for the melting process of polymer material was presented,which is based on the optics-thermal interaction of CO2 laser to polymer material. According to the energy conservation and thermal physics,the mathematical models of laser parameters and temperature was analyzed under CO2 laser irradiating,and the effect relationship between laser parameters and melting depth of typical polymer material was discussed with the methods of numerical calculation and experiment. The obtained results demonstrate that there is the surface and depth melting process characteristic,the reasonably laser processing parameters has the biggest effect for polymer material melting process from outside to inside,and the theoretical results of melting depth fit well with experiments data. Accordingly,the model and formula can provide a theory foundation to control plasticizing and processing of polymer material under CO2 laser irradiating.
出处
《机械科学与技术》
CSCD
北大核心
2014年第9期1354-1358,共5页
Mechanical Science and Technology for Aerospace Engineering
基金
江苏省自然科学基金项目(BK2010351)
江苏省普通高校研究生科研创新计划项目(CXZZ11-0545)
江苏省光子制造科学与技术重点实验室开放基金项目(GZ201205)资助
关键词
CO2激光
聚合物
熔融塑化
理论模型
数值计算
calculations
carbon dioxide lasers
energy conservation
experiments
mathematical models
melting process
polymers
temperature
