摘要
介绍自行设计新型液压脉振注射成型机的注射部分结构性能,分析了螺杆在振动力场下的轴向受力状况,通过将实际螺杆简化成广义螺杆,利用集中质量的方法建立了注射过程螺杆轴向振动响应的物理和数学模型,研究了此种振动装置在注射过程螺杆的动态响应。在工作频率范围内,随着振动频率增大,螺杆响应振幅减小,低频率激励的振幅动态放大系数高于高频率激励振幅放大系数,实验结果与理论分析相一致,为新型液压脉振注射成型机振动参数的确定提供了理论依据。
The structure and the performance of the injection part of the hydraulic vibration injection molding machine are presented.The axial force distribution of the screw is analyzed.By simplifying the actual screw to a generalized model,the physical model and mathematic model to describe the screw＇s axial vibration in the injection process are established using the method of lumped-mass,and then the screw＇s dynamic responses are examined.Results show that the vibration amplitude of the screw decreases with the increase of frequency;and the amplified coefficient of amplitude in low frequency is bigger than that in high frequency in the range of adjusting frequency.The experimental results are in good agreements with those of theoritcal analysis.
出处
《工程力学》
EI
CSCD
北大核心
2011年第2期252-256,共5页
Engineering Mechanics
基金
国家自然科学基金重大项目(10590351)
国家自然科学基金面上项目(10472034)
关键词
液压脉振
注射
螺杆
阻尼
动态特性
hydraulic vibration
injection
screw
damping
dynamic characteristic
