某型复合加工机床床身动态特性分析与结构优化

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英文篇名：Dynamic characteristic analysis and structure optimization of compound machine tool bed 作者：刘冰 ; 陈诚 ; 王勇 ; 杨雄 ; 刘国兴 ; 王超豪 英文作者：Liu Bing;Chen Cheng;Wang Yong;Yang Xiong;Liu Guoxing;Wang Chaohao;School of Mechanical Engineering,Tianjin University of Commerce;Tianjin Ju Xin Hongtai Metal Material Co., Ltd.; 关键词：床身 ; 有限元 ; 模态分析 ; 动态特性 ; 结构优化 英文关键词：machine tool bed;;finite element;;modal analysis;;dynamic characteristic;;structure optimization 中文刊名：DZIY 英文刊名：Journal of Electronic Measurement and Instrumentation 机构：天津商业大学机械工程学院;天津聚鑫宏泰金属材料有限公司; 出版日期：2019-03-15 出版单位：电子测量与仪器学报 年：2019 期：v.33;No.219 基金：国家自然科学基金(51805371);; 天津市自然科学基金(18JCQNJC75400)资助项目 语种：中文; 页：DZIY201903010 页数：6 CN：03 ISSN：11-2488/TN 分类号：78-83

摘要

床身作为整体机床的重要支撑部件,其动态特性直接影响机床加工质量和可靠性。建立了某型复合加工机床的床身三维模型,基于结构模态振动理论,利用有限元分析软件ANSYS提供的APDL语言,通过对机床床身前六阶固有频率及振型的对比分析,研究不同筋板结构对床身固有频率的影响,提出了床身结构优化方案。分析了地脚螺栓安装处筋板厚度对床身动态特性的影响,发现筋板厚度的增加对床身一阶固有频率的提高具有促进作用,优化后的机床床身一阶固有频率提高了39.7%,具有更好的动态性能,有利于提高机床的加工质量和可靠性。
        As an important supporting part of the whole machine tool, the dynamic characteristics of the machine tool bed directly affect the quality and reliability of the machine tool, so that A 3 D model of a compound machine tool bed was established. Based on the theory of structural modal vibration, the first 6-order natural frequencies and vibration modes of the machine tool bed was analyzed comparatively, using the APDL language provided by the finite element analysis software ANSYS. The effect of ribbed slab on the natural frequency of the machine tool bed was studied, and an optimization scheme of bed structure was proposed. The influence of the stiffener thickness where the foundation bolts were installed was also investigated. It was found that the increase of the stiffener thickness could improve the first natural frequency of the tool bed. It indicates that the first natural frequency of the optimized machine tool bed increased by 39.7%, so that it has better dynamic characteristics and is conducive to improve the quality and reliability of the machine tool.

引文

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