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Identification of cutting force coefficients in machining process considering cutter vibration

机译：考虑刀具振动的加工过程中切削力系数的识别

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摘要

Among current cutting force models, cutting force coefficients still are the foundation of predicting calculation combined with consideration of geometry engagement variation, equipment characteristics, material properties and so on. Attached with unimpeachable significance, the traditional and some novel identification methods of cutting force coefficient are still faced with trouble, including repeated onerous work, over ideal measuring condition, variation of value due to material divergence, interference from measuring units. To utilize the large amount of data from real manufacturing section, enlarge data sources and enrich cutting data base for former prediction task, a novel identification method is proposed by considering stiffness properties of the cutter-holder-spindle system in this paper. According to previously proposed studies, the direct result of cutter vibration is the form of dynamic undeformed chip thickness. This fluctuation is considered in two stages of this investigation. Firstly, a cutting force model combined with cutter vibration is established in detailed way. Then, on the foundation of modeling, a novel identification method is developed, in which the dynamic undeformed chip thickness could be obtained by using collected data. In a carefully designed experiment procedure, the reliability of model is validated by comparing predicted and measured results. Under different cutting condition and cutter stiffness, data is collected for the justification of identification method. The results showed divergence in calculated coefficients is acceptable confirming the possibility of accomplishing targets by applying this new method. In discussion, the potential directions of improvement are proposed.
机译：在目前的切削力模型中，切削力系数仍然是结合几何啮合变化，设备特性，材料性能等因素进行预测计算的基础。传统的和新颖的切削力系数识别方法具有不可估量的意义，仍然面临麻烦，包括重复繁重的工作，在理想的测量条件下，由于材料发散引起的值变化，测量单元的干扰。为了充分利用实际生产环节的大量数据，扩大数据源，丰富切削数据库的需求，提出了一种结合刀架-主轴系统刚度特性的识别方法。根据先前提出的研究，刀具振动的直接结果是动态未变形切屑厚度的形式。在本研究的两个阶段中考虑了这种波动。首先，建立了结合刀具振动的切削力模型。然后，在建模的基础上，开发了一种新颖的识别方法，该方法可以利用收集的数据获得动态未变形切屑厚度。在精心设计的实验程序中，通过比较预测结果和测量结果来验证模型的可靠性。在不同的切削条件和刀具刚度下，收集数据以证明识别方法的合理性。结果表明，计算系数的差异是可以接受的，从而确认了通过应用这种新方法来实现目标的可能性。在讨论中，提出了改进的潜在方向。

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  • 来源
    《Mechanical systems and signal processing》 |2018年第15期|39-59|共21页
  • 作者

    Qi Yao; Ming Luo; Dinghua Zhang; Baohai Wu;

  • 作者单位

    Key laboratory of Contemporary Design and Integrated Manufacturing Technology (Northwestern Pofytechnical University), Ministry of Education, Xi'an, China;

    Key laboratory of Contemporary Design and Integrated Manufacturing Technology (Northwestern Pofytechnical University), Ministry of Education, Xi'an, China;

    Key laboratory of Contemporary Design and Integrated Manufacturing Technology (Northwestern Pofytechnical University), Ministry of Education, Xi'an, China;

    Key laboratory of Contemporary Design and Integrated Manufacturing Technology (Northwestern Pofytechnical University), Ministry of Education, Xi'an, China;

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

    Machining; Cutting force coefficient; Cutting force; Chip thickness; Milling process;

    机译：加工;切削力系数;切削力切屑厚度;研磨工艺;

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