• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2022, Vol. 58 ›› Issue (7): 309-316.doi: 10.3901/JME.2022.07.309

• 制造工艺与装备 • 上一篇    下一篇

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基于相似理论的重型数控机床-基础系统位移变形研究

张建涛1, 刘志峰1,2, 李彦生1, 姜凯1, 杨聪彬1, 张彩霞1   

  1. 1. 北京工业大学机械工业重型机床数字化设计与测试技术重点实验室 北京 100124;2. 吉林大学数控装备可靠性教育部重点实验室 长春 130025
  • 收稿日期:2021-04-01 修回日期:2021-12-15 出版日期:2022-05-20 发布日期:2022-05-20
  • 通讯作者: 刘志峰(通信作者),男,1973年出生,博士,教授,博士研究生导师。主要研究方向为数字化设计与制造、机械传动、制造信息化与信息管理系统、CIMS。E-mail:lzf@bjut.edu.cn
  • 作者简介:张建涛,男,1996年出生。主要研究方向为数字化设计与制造。E-mail:zhangjiantao_2020@163.com
  • 基金资助:
    国家自然科学基金资助项目(51975019)。

Research on Displacement Deformation of the Heavy-duty CNC Machine Tool-Foundation System Based on Similarity Theory

ZHANG Jiantao1, LIU Zhifeng1,2, LI Yansheng1, JIANG Kai1, YANG Congbin1, ZHANG Caixia1   

  1. 1. Machinery Industry Key Laboratory of Heavy Machine Tool Digital Design and Testing Technology, Beijing University of Technology, Beijing 100124;2. Key Laboratory of CNC Equipment Reliability (Ministry of Education), Jilin University, Changchun 130025
  • Received:2021-04-01 Revised:2021-12-15 Online:2022-05-20 Published:2022-05-20

摘要: 提升重型数控机床的加工精度是高端装备领域的研究热点,然而关于基础沉降变形对机床精度的影响这一问题却少有研究。为了研究由基础沉降变形引起重型数控机床加工精度变化的规律,基于欧拉伯努利梁单元理论,考虑基础和机床相互耦合作用关系,建立起机床结构-基础系统的一体化变形协调方程,以横梁中点位姿变化为目标,进行整体刚度矩阵求解过程中的节点坐标标定方案分析;根据相似理论,构造重型数控机床-基础系统的缩尺模型,分析设计的缩尺模型和机床原尺模型之间静力位移变形关系,给出缩尺模型和原尺模型的映射规律,为有效解决基础沉降引起的机床精度变化和精度补偿提供依据和技术支撑。

关键词: 重型数控机床, 基础沉降, 梁单元, 相似理论, 缩尺模型

Abstract: Improving the machining accuracy of the heavy-duty CNC machine tools is a hot topic in the high-end equipment field, but there is little research on the impact of foundation settlement deformation on machine tool accuracy. In order to study the law of changes in the machining accuracy of heavy-duty CNC machine tools caused by the foundation deformation, based on the Euler Bernoulli beam element theory, the interaction between the foundation and the machine tool are considered, the integrated deformation coordination equation of the machine tool structure and the basic system can be established, taken the position and attitude change of the midpoint of the beam as the goal, the node coordinate calibration scheme in the process of solving the overall stiffness matrix are analyzed; according to similarity theory, the scale model of the heavy-duty CNC machine tool-basic system are created, the static displacement deformation relationship between the designed scale model and the original scale model of the machine tool are analyzed, and the mapping law of the scale model and the original scale model can be obtained, provide basis and technical support to effectively solve the foundation settlement caused The machine tool accuracy change and accuracy compensation

Key words: heavy-duty CNC machine tools, foundation settlement, beam element, similarity theory, scale-down model

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