摘要
针对玻璃与模具的材料属性、随时间变化的黏弹性和结构松弛原理,基于非线性有限元软件MSC.Marc建立了非球面玻璃透镜的超精密模压成形的有限元数值仿真分析模型,对比分析了不同工艺参数(模压温度、模压速度、摩擦因数等)对成形透镜残余应力与轮廓偏移量的影响。研究结果表明:随着模压温度的升高、模压速度和摩擦因数的减小,残余应力相应减小;随着模压温度和退火速度的增大,以及模压速度的减小,轮廓偏移量相应变小。
Based on material properties,the time dependent viscoelastic,structure relaxation,a simulation model of aspherical glass molding process was built by using the commercial finite element program Marc.Comparative analysis of influence of different process parameters（molding temperature,pressing velocity,friction coefficient） on the molding process for the residual stress and the profile deviation was discussed.The investigation shows that the residual stress increases coupled with pressing velocity,friction coefficient,and the reduction of molding temperature.The investigation also shows that the profile deviation decreases coupled with increasing molding temperature and cooling velocity, decreasing pressing velocity.
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
2013年第18期2509-2514,共6页
China Mechanical Engineering
基金
国家科技重大专项(2010ZX04001-151)
国家自然科学基金资助项目(50975804)
关键词
模压成形
有限元分析
残余应力
轮廓偏移量
glass molding
finite element analysis
residual stress
profile deviation
