文献类型：期刊文献

中文题名：振动修整过程中三维介质运动离散模型的研究

英文题名：Research of discrete element modeling of 3D media motion in vbratory finishing process

作者：姬清华[1]

第一作者：姬清华

机构：[1]新乡学院

第一机构：新乡学院

年份：2019

卷号：0

期号：3

起止页码：91-95

中文期刊名：制造技术与机床

外文期刊名：Manufacturing Technology & Machine Tool

收录：CSTPCD;;Scopus;北大核心:【北大核心2017】；

基金：河南省重点科技攻关项目"复合涂层刀具的研制及切削机理研究"(142102210252)

语种：中文

中文关键词：振动抛光;离散;动态运动;临界抛光参数

外文关键词：vibratory finishing;discrete;dynamic motion;critical operating parameters

摘要：振动修整过程中,系统中介质运动状态的变化受多方面因素的影响。因此,对振动修整系统中修整介质的动态运动情况进行预测具有重要意义。为此,基于离散元方法(DEM)建立振动修整三维有限元模型,用于计算介质粒子间的相互作用,如法向接触力和切向接触力;然后,基于Hertzian接触力学的DEM模型预测了单个粒子在机械振动容器内的动态运动;研究了接触刚度、摩擦、阻尼等接触参数对介质运动的影响,确定了振动修整过程的临界修整参数;最后,对仿真结果进行了实验验证。结论表明,振动修整三维离散有限元模型能准确预测介质流动和局部撞击颗粒的介质运动,通过参数设置调整颗粒运动模式和速度,能够获得最大限度地提高材料的去除率。
In the process of vibration finishing,the change of the motion state of the media in the system is influenced by many factors.Therefore,it is of great significance to predict the dynamic motion of the media in the vibration finishing system.A model has been developed to investigate the three-dimensional media motion during the vibratory finishing processes based on the discrete element method(DEM),which could calculate the media interactive normal and tangential contact forces among the media particles.The DEM model based on Hertzian contact mechanics predicts the dynamic motion of individual particles inside the vibratory machine container.The influence of contact parameters such as contact stiffness,friction and damping on media motion has been investigated to determine the critical operating parameters for the vibratory finishing process.Finally,the simulation results have been validated with experimental data.This model provides an understanding of vibratory finishing process fundamentals,guidelines for vibratory finishing machine design and optimal operating conditions.The experimental results show that,the three-dimensional discrete finite element model of vibration modification can predict the medium flow and local impact of particles in the medium accurately.By adjusting the particle motion mode and speed by parameter setting,the material removal rate can be maximally improved.