A theoretical and experimental study of surface generation under spindle vibration in ultra-precision raster milling
A theoretical and experimental study of surface generation under spindle vibration in ultra-precision raster milling
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DOI：
10.1016/j.ijmachtools.2013.08.003
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发表时间：
2013-12
影响因子：
14
通讯作者：
S. Zhang;S. To
中科院分区：
文献类型：
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作者：
S. Zhang;S. To
在超精密栅格铣削加工中，类脉冲切削力引起的脉冲主轴振动是影响表面形貌的内在而特殊的机理。它与车削过程中阶梯状切削力引起的阶梯主轴振动有根本区别。然而，目前还没有对脉冲主轴振动下的表面生成进行深入的研究。因此，本文从理论和实验上阐述了在UPRM中，(1)冲击主轴振动包括轴向、径向和有阻尼的主轴耦合摆动振动；(2)类脉冲切削力的激励频率，即主轴转速，决定了主轴振动特性，即同步或异步主轴振动；(3)主轴耦合摆动振动是影响表面产生的主要因素；(4)由脉冲主轴振动引起的主轴振动波形在被加工表面产生不规则的、格状和条纹状的图案或它们的混合图案之一。
In ultra-precision raster milling (UPRM), the impulse spindle vibration induced by the impulse-like cutting forces is intrinsic and special mechanism majorly influencing surface topography. It is fundamentally distinctive with the step spindle vibration induced by the step-like cutting forces in turning. However, no work has been conducted to study surface generation under the impulse spindle vibration in UPRM in depth. Consequently, this paper theoretically and experimentally elaborates that in UPRM, (i) the impulse spindle vibration includes the axial, radial and coupled-tilting spindle vibration with damping; (ii) the excitation frequency of the impulse-like cutting forces, i.e. spindle speed, determines the spindle vibration characteristics, i.e. synchronous or asynchronous spindle vibration; (iii) the coupled-tilting spindle vibration is a predominant factor influencing surface generation; and (iv) the irregular spindle-vibration waves induced by the impulse spindle vibration produce one of the irregular, lattice-like and stripe patterns or their hybrids at a milled surface.