Modelling of the Influence of Tool Runout on Surface Generation in Micro Milling
Modelling of the Influence of Tool Runout on Surface Generation in Micro Milling
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DOI：
10.1186/s10033-019-0318-x
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发表时间：
2019-01-23
影响因子：
4.2
通讯作者：
Teng, Xiangyu
中科院分区：
文献类型：
--
作者：
Chen, Wanqun;Sun, Yazhou;Teng, Xiangyu
微铣削加工是一种灵活、经济的加工方法，可以在多种工程材料上加工出具有三维几何特征的微构件。但加工表面的粗糙度和微观形貌限制了微零件的加工性能。提出了一种同时考虑刀具径向跳动和轴向跳动的微端面铣削曲面生成仿真方法。首先，基于微细铣刀的几何形状建立了曲面生成模型。其次，研究了轴向跳动和径向跳动对表面成形的影响，实现了表面粗糙度的预测。研究发现，轴向跳动对表面形貌的产生有着重要的影响。定量研究了轴向跳动对表面微观形貌的影响，给出了每齿变进给加工特定表面形貌时的临界轴向跳动值。最后，通过实验对所提出的模型进行了验证，得到了良好的相关性。该曲面生成模型为功能加工曲面的曲面参数设计和优化提供了依据。
Micro milling is a flexible and economical method to fabricate micro components with three-dimensional geometry features over a wide range of engineering materials. But the surface roughness and micro topography always limit the performance of the machined micro components. This paper presents a surface generation simulation in micro end milling considering both axial and radial tool runout. Firstly, a surface generation model is established based on the geometry of micro milling cutter. Secondly, the influence of the runout in axial and radial directions on the surface generation are investigated and the surface roughness prediction is realized. It is found that the axial runout has a significant influence on the surface topography generation. Furthermore, the influence of axial runout on the surface micro topography was studied quantitatively, and a critical axial runout is given for variable feed per tooth to generate specific surface topography. Finally, the proposed model is validated by means of experiments and a good correlation is obtained. The proposed surface generation model offers a basis for designing and optimizing surface parameters of functional machined surfaces.