Thrust force model for vibration-assisted drilling of aluminum 6061-T6
Thrust force model for vibration-assisted drilling of aluminum 6061-T6
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DOI：
10.1016/j.ijmachtools.2009.07.011
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发表时间：
2009-11
影响因子：
14
通讯作者：
S. Chang;G. Bone
中科院分区：
文献类型：
--
作者：
S. Chang;G. Bone
振动辅助在金属去除工艺中的应用越来越多。这种方法在切削过程中在进给方向上引起高频和低振幅的振动，并有可能减少切削力，从而提高表面质量和减少刀具磨损。请注意，这种切割过程与超声波加工不同。本文提出了一个推力模型，预测在振动辅助钻削铝6061-T6的推力。该模型结合了犁耕力和应变率相关的剪切强度，以提供比现有模型更准确的预测。本文报道了用TiN涂层标准麻花钻进行72次钻削试验的结果。从开发的推力模型的预测与实验结果进行了比较。比较表明，使用现有模型的预测值和实验测量的平均值之间的最大偏差为20%，使用所提出的模型只有7%。
Vibration assistance has increasing applications in metal removal processes. This method induces high-frequency and low-amplitude vibration in the feed direction during cutting, and has the potential to reduce cutting forces leading to improved surface quality and reduced tool wear. Note that this cutting process is distinct from ultrasonic machining. This paper presents a thrust force model to predict the thrust force during vibration-assisted drilling of aluminum 6061-T6. This model incorporates plowing force and strain rate-dependent shear strength to provide more accurate predictions than the existing model. The results of 72 drilling experiments with TiN-coated standard twist drills are reported. The predictions from the developed thrust force model are compared with the experimental results. The comparison demonstrates that the maximum deviation between the predictions and the averaged values of the experimental measurements is 20% using the existing model and only 7% using the proposed model.