摘要
为了满足聚甲基丙烯酸甲酯(PMMA)微结构件的高效率和高质量成型加工,提出了激光融化成型新方法,设计和研制实验装置,采用CO2激光扫描辐照方式进行融化成型实验,依据热物理和能量守恒原理,理论计算和模拟分析试样在激光扫描过程中的温度场变化,并通过正交实验设计和实验,分析工艺参数对微结构复制精度的影响。结果表明:熔体温度是影响成型质量的主要因素,温度高则成型精度好;工艺参数对微结构复制精度的影响程度分别是:激光功率对提高复制精度起决定性作用,其次是扫描时间和模具温度,最后是成型压力。采用优化后的工艺参数进行实验,获得较好的微结构复制精度,表明了PMMA微结构件的激光融化成型具有可行性。
In order to realize molding process of polymethyl methacrylate（PMMA）micro-structured parts with high efficiency and high precision,a new molding method is presented with laser melting.This paper develops fabrication and experiment devices,and carry out the experiment of laser melting-molding on PMMA microstructures by CO2 laser scanning.According to thermal physics and energy conservation the temperature variation of samples is analyzed with the method of numerical analysis and simulation,and the effects of the various processing parameters on replication quality are investigated via orthogonal experiment.The results show that the temperature of the melt is the main factor affecting the quality of the molding,where high temperature leads to a good molding precision.Laser power is the decisive parameter to influence the replication precision of the micro-structure;scanning time and mould temperature are the secondary factors;molding pressure is the least important among them.At last,the molding process of PMMA microstructure with good replication precision is obtained by optimized process.It is demonstrated that the proposed process is a feasible and effective way to laser melting-molding PMMA micro-structured parts.
出处
《中国激光》
EI
CAS
CSCD
北大核心
2014年第7期99-104,共6页
Chinese Journal of Lasers
基金
国家自然科学基金(51175236)
江苏省普通高校研究生科研创新计划资助项目(CXZZ11_0545)
江苏省光子制造科学与技术重点实验室开放基金资助项目(GZ201205)
江苏省"333工程"项目
关键词
激光技术
CO2激光
融化成型
微结构件
复制精度
laser technique
CO2 laser
melting-molding
micro-structured parts
replication precision
