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Optimization and improvement of stable processing condition by attaching additional masses for milling of thin-walled workpiece

机译：通过附加用于铣削薄壁工件的质量来优化和改善稳定的加工条件

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摘要

Light weight is the main design requirement for minimizing costs or fuel consumption in mechanical equipments, and it, together with the material removal rate (MRR) requirement, also brings an important source of chatter, which still remains as an essential phenomenon to be suppressed in the future. This paper investigates the stable cutting region optimization problems in milling of structures with low rigidity. An effective method is proposed to improve the chatter stability by attaching appropriate additional masses to the workpiece, and thorough studies are also carried out to reveal the effect of additional masses on chatter stability. An efficient method based on structural dynamic modification scheme is developed to calculate the varying dynamics of the in-process workpiece under the combined effect of additional masses and material removal during milling process. Typical characteristic of this method lies in that only one modal analysis is needed to be performed on the finite element (FE) model of the initial workpiece, and the mode shape and natural frequency of the workpiece after attaching additional masses and removing material at each tool position can be calculated without the requirement to rebuild the FE model of the in-process workpiece. Based on the proposed dynamic modification scheme, an optimization algorithm is established to obtain the optimized combination of additional masses and the suitable stable cutting region for the achievement of maximum MRR. The proposed method is verified by milling process of a set of thin-walled workpieces, and comparisons of predictions and measurements show the validity and reliability.
机译：轻量化是使机械设备的成本或燃料消耗最小化的主要设计要求，并且它与材料去除率（MRR）要求一起也带来了重要的震颤来源，仍然是必须抑制的主要现象。未来。本文研究了低刚度结构铣削中的稳定切削区域优化问题。提出了一种有效的方法，通过在工件上附加适当的附加质量来改善颤振的稳定性，并且还进行了深入的研究以揭示附加质量对颤振稳定性的影响。开发了一种基于结构动态修改方案的有效方法，以计算铣削过程中附加质量和材料去除共同作用下在加工工件的变化动力学。此方法的典型特征在于，只需对初始工件的有限元（FE）模型执行一次模态分析，并且在附加附加质量并在每个工具上去除材料后，工件的模态形状和固有频率可以计算位置，而无需重建加工中工件的有限元模型。基于提出的动态修改方案，建立了一种优化算法，以获得附加质量和合适的稳定切削区域的优化组合，以实现最大MRR。通过对一组薄壁工件进行铣削加工，验证了该方法的有效性，并与预测和测量结果进行了比较，证明了该方法的有效性和可靠性。

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  • 来源
    《Mechanical systems and signal processing》 |2018年第15期|196-215|共20页
  • 作者

    Min Wan; Xue-Bin Dang; Wei-Hong Zhang; Yun Yang;

  • 作者单位

    School of Mechanical Engineering, Northwestern Polytechnical University, Xi'an, Shaanxi 710072, China,State IJR Center of Aerospace Design and Additive Manufacturing, Northwestern Polytechnical University, Xian, Shaanxi 710072, China;

    School of Mechanical Engineering, Northwestern Polytechnical University, Xi'an, Shaanxi 710072, China,State IJR Center of Aerospace Design and Additive Manufacturing, Northwestern Polytechnical University, Xian, Shaanxi 710072, China;

    School of Mechanical Engineering, Northwestern Polytechnical University, Xi'an, Shaanxi 710072, China,State IJR Center of Aerospace Design and Additive Manufacturing, Northwestern Polytechnical University, Xian, Shaanxi 710072, China;

    School of Mechanical Engineering, Northwestern Polytechnical University, Xi'an, Shaanxi 710072, China,State IJR Center of Aerospace Design and Additive Manufacturing, Northwestern Polytechnical University, Xian, Shaanxi 710072, China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Chatter stability; In-process workpiece dynamics; Additional masses; Milling process; Stable cutting region optimization;

    机译：颤振稳定性;过程中的工件动力学;额外的群众;研磨工艺;稳定的切割区域优化;

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