Theoretical and Experimental Investigations of Tool Tip Vibration in Single Point Diamond Turning of Titanium Alloys
Theoretical and Experimental Investigations of Tool Tip Vibration in Single Point Diamond Turning of Titanium Alloys
复制标题
钛合金单点金刚石车削刀尖振动的理论与实验研究
DOI：
10.3390/mi10040231
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发表时间：
2019-03
期刊：
影响因子：
3.4
通讯作者：
To Suet
中科院分区：
文献类型：
--
作者：
Yip Wai Sze;To Suet
单点金刚石车削 (SPDT) 中的材料膨胀效应会导致加工表面出现粗糙材料，从而减慢刀尖振动的运动，并充当具有阻尼效应的简单冲击摆系统，并在快速傅立叶变换 (FFT) 中显示单个双峰。由于钛合金的弹性模量低、导热系数低，钛合金在SPDT中的材料膨胀效应比传统金属严重得多。因此，钛合金 SPDT 中的刀尖振动预计与之前的报道不同。在这项研究中，除了证明主切削运动引起的材料膨胀效应引起的原始单双峰之外，我们最近报道了钛合金SPDT中刀尖振动运动引起的二次材料膨胀引起的另一个双峰。额外的双峰位于 FFT 中原始双峰的右侧，在切削力的频域中显示出两个双峰，表明钛合金 SPDT 中存在另一个具有新阻尼因子的刀尖振动系统。结合主次材料膨胀的影响，建立了修正刀尖振动系统阻尼系数的新动力学模型，利用新模型可以更准确地预测SPDT加工钛合金的表面粗糙度。本文提供了切削力、表面粗糙度和表面轮廓的 FFT，用于实验验证。
The material swelling effect in single point diamond turning (SPDT) causes ragged materials on a machined surface which slows down the movements of tool tip vibration, and acts as a simple impacted pendulum system with a damping effect and displays a single twin peak in fast Fourier transform (FFT). Due to the low elastic modulus and low thermal conductivity of titanium alloys, the material swelling effect of titanium alloys in SPDT is much more serious than that of traditional metals. For this reason, the tool tip vibration in SPDT of titanium alloys is expected to be different from previous reports. In this study, apart from the demonstration of the original single twin peak induced from the material swelling effect by the main cutting motion, we reported recently that there exists another twin peak induced by secondary material swelling arising from the movement of tool tip vibration in the SPDT of titanium alloys. The additional twin peak was located at the right side of the original twin peak in FFT, displaying two twin peaks in the frequency domain of cutting force and suggesting the existence of another tool tip vibration system with a new damping factor in the SPDT of titanium alloys. Combining the effects of primary and secondary material swelling, the new dynamic model with the modified damping factor of tool tip vibration system are developed, which surface roughness of the machined titanium alloys in SPDT was predicted in higher accuracy by using the new model. The FFT of cutting force, surface roughness, and surface profile were provided in this article for the experimental validations.
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DOI：
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期刊：
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影响因子：
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DOI：
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