Roundness Errors in BTA Drilling and a Model of Waviness and Lobing Caused by Resonant Forced Vibrations of Its Long Drill Shaft
Roundness Errors in BTA Drilling and a Model of Waviness and Lobing Caused by Resonant Forced Vibrations of Its Long Drill Shaft
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DOI：
10.1115/1.1765142
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发表时间：
2004-08
影响因子：
4
通讯作者：
C. Deng;Jih-Hua Chin
中科院分区：
文献类型：
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作者：
C. Deng;Jih-Hua Chin
钻孔时，工具具有明显的轴长度。该方程组揭示了孔瓣的低频机制。所提出的系统由代表工具轴的欧拉-伯努利梁方程和傅里叶级数形式的激振力组成。建立了经验切削力并计算了相关切削力分量。并对模态和谐波的累积贡献进行了评估。所提出的方程组的解可以预测孔的圆度，这与不同条件下的实验结果一致。该解决方案还允许对波纹度和波瓣进行研究。结果表明，孔上凸角的奇异现象实际上是 Tlusty 所描述的铣削波纹现象。该方程的严格数学性质为以前对工件波纹度和凸角的经验观察奠定了坚实的基础。 @DOI：10.1115/1.1765142#
of drilling in which the tools are with pronounced shaft length. The equation system turned out to disclose the low frequency mechanism of hole lobes. The proposed system is composed of Euler-Bernoulli beam equation representing tool shaft, and an excitation force in form of Fourier series. An empirical cutting force was established and related cutting force components were calculated. And the accumulated contribution of modes and harmonics was evaluated. The solution for the proposed equation system allowed a prediction of hole roundness which was consistent with experimental results for different conditions. The solution also allowed an investigation into the waviness and lobes. The results suggested that the bizarre phenomenon of lobes on hole is in reality waviness described by Tlusty for milling. The rigorous mathematical nature of the proposed equation built solid foundation for former empirical observation of waviness and lobes on work pieces. @DOI: 10.1115/1.1765142#