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Investigation of ball screw's alignment error based on dynamic modeling and magnitude analysis of worktable sensed vibration signals

机译：基于动态建模和工作台感应振动信号幅度分析的滚珠丝杠对准误差研究

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摘要

The alignment precision of existing methods is limited by the precision of detecting element and worker's experience, which the parallelism between ball screw and guide way is not guaranteed effectively. Thus, this paper aims to propose a method of detecting ball screw's alignment error (BSAE) via monitoring the average vibration magnitude induced by rotational frequency of ball screw (VMRFBS). Design/methodology/approach - In this study, the ball screw is simplified as a freely supported beam. A mathematical model of the effect of BSAE on the contact angle of the ball and screw is established. The change of contact angle has effect on the deformation and contact stiffness according to the Hertz contact theory. To improve the accuracy of the experimental results, the VMRFBS are analyzed by using average method, and the average values of the VMRFBS at different BSAEs are calculated by using the least squares method. Findings - The experimental results show that the average VMRFBS increases with the increasing of BSAE under the BSAE from 0 to 0.2 mm, while the other conditions are unchanged. Originality/value - This method provides an approach to monitor the BSAE and improve the alignment accuracy of machine tools and automation equipment, which has a certain guide for improving the alignment accuracy of ball screw.
机译：现有方法的对准精度受检测元件精度和工人经验的限制，滚珠丝杠与导轨之间的平行度不能得到有效保证。因此，本文旨在提出一种通过监测滚珠丝杠的旋转频率（VMRFBS）引起的平均振动幅度来检测滚珠丝杠的对准误差（BSAE）的方法。设计/方法/方法-在此研究中，滚珠丝杠简化为自由支撑的梁。建立了BSAE对滚珠与丝杠接触角影响的数学模型。根据赫兹接触理论，接触角的变化会影响变形和接触刚度。为了提高实验结果的准确性，采用平均法对VMRFBS进行了分析，并采用最小二乘法计算了不同BSAE处的VMRFBS的平均值。发现-实验结果表明，在BSAE下，从0到0.2 mm，平均VMRFBS随BSAE的增加而增加，而其他条件不变。独创性/价值-此方法提供了一种监控BSAE并提高机床和自动化设备的对中精度的方法，它对提高滚珠丝杠的对中精度具有一定的指导意义。

著录项

  • 来源
    《Assembly Automation》 |2017年第4期|483-489|共7页
  • 作者

    Wang Yiqiang; Guo Zhengcai; Liu Botao; Zhu Yanfei; Luo Haibo;

  • 作者单位

    Ningbo Institute of Technology, Zhejiang University, Ningbo, China;

    School of Mechanical Engineering, Taiyuan University of Science and Technology, Taiyuan, China;

    School of Mechanical Engineering, Zhejiang University, Hangzhou, China;

    School of Mechanical Engineering, Shandong University of Technology, Zibo, China;

    School of Mechanical Engineering, Zhejiang University, Hangzhou, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Alignment error; Ball screw; Contact angle; Machine tools; Vibration characteristic;

    机译：对准误差;滚珠丝杠;接触角;机械工具;振动特性;

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