Chatter Stability of General Turning Operations With Process Damping
Chatter Stability of General Turning Operations With Process Damping
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DOI：
10.1115/1.3159047
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发表时间：
2009-08-01
影响因子：
4
通讯作者：
Altintas, Y.
中科院分区：
文献类型：
--
作者：
Eynian, M.;Altintas, Y.
在一般车削操作中，颤振稳定性的准确预测需要包括刀具几何形状和切削条件。本文提出了再生切屑和再生切屑面积/切削刃接触长度的动态切削力模型，考虑了切削条件和车刀几何形状。切割过程被建模为沿着切割边缘的两个端点之间的等效弦长沿着发生。再生切屑模型简单，稳定性可直接求解。然而，三维模型考虑了刀具振动在当前和以前的主轴旋转的影响上的芯片面积，弦长，和力的方向，并解决了使用奈奎斯特稳定性标准。磨损后刀面进入精加工表面的渗透被认为是过程阻尼的来源。刀尖半径，接近角的工具，和进给速度的影响进行了研究。建议的稳定性模型进行了比较有利的实验结果。
The accurate prediction of chatter stability in general turning operations requires the inclusion of tool geometry and cutting conditions. This paper presents regenerative chip and regenerative chip area/cutting edge contact length based dynamic cutting force models, which consider cutting conditions and turning tool geometry. The cutting process is modeled as it takes place along the equivalent chord length between the two end points of the cutting edge. The regenerative chip model is simple, and the stability can be solved directly. However, the three-dimensional model considers the effect of tool vibrations at the present and previous spindle revolutions on the chip area, chord length, and force directions and is solved using Nyquist stability criterion. The penetration of worn tool flank into the finish surface is considered as a source of process damping. The effects of the nose radius, approach angle of the tool, and feedrate are investigated. The proposed stability model is compared favorably against the experimental results.