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Analysis of the Vibration Characteristics of a Boring Bar with a Variable Stiffness Dynamic Vibration Absorber

机译:变刚度动态振动吸收器镗杆振动特性分析

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摘要

Boring bars are widely used in deep hole machining. Due to the low stiffness of the long cantilever boring bar, vibration often occurs in the boring process. Vibration suppression can permit higher productivity and a better surface finish. To improve the performance of boring operations, a variable stiffness dynamic vibration absorber (DVA) is added inside the boring bar to reduce the vibration. The stiffness of the DVA is provided by two rubber bushes placed inside the DVA. By changing the axial compression, the stiffness of the DVA can be adjusted to accommodate different excitation frequencies. By establishing the relationship between the stiffness of the DVA and the axial compression of the rubber bush, the optimal stiffness for different excitation frequencies can always be found. A boring experiment is conducted, and the results show that, by selecting a reasonable axial compression, the vibration of the boring bar can be effectively suppressed.
机译:镗杆广泛用于深孔加工。由于长悬臂镗杆的低刚度,振动通常发生在钻孔过程中。振动抑制可以允许更高的生产率和更好的表面光洁度。为了提高钻孔操作的性能,在镗杆内添加可变刚度动态减振器(DVA)以减少振动。 DVA的刚度由位于DVA内部的两个橡胶衬套提供。通过改变轴向压缩,可以调节DVA的刚度以适应不同的激励频率。通过建立DVA刚度与橡胶衬套的轴向压缩之间的关系,可以随时找到不同励磁频率的最佳刚度。进行了镗孔实验,结果表明,通过选择合理的轴向压缩,可以有效地抑制镗杆的振动。

著录项

  • 来源
    《Shock and vibration》 |2019年第8期|5284194.1-5284194.13|共13页
  • 作者

    Li Lie; Sun Beibei; Hua Haitao;

  • 作者单位

    Southeast Univ Sch Mech Engn Nanjing 211189 Jiangsu Peoples R China;

    Southeast Univ Sch Mech Engn Nanjing 211189 Jiangsu Peoples R China;

    Southeast Univ Sch Mech Engn Nanjing 211189 Jiangsu Peoples R 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

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