6061-T6型振动辅助铝钻的动力模型

6061-T6型振动辅助铝钻的动力模型(中文5200字,英文3000字)
Simon S.F. Chang, Gary M. Bone
（麦可马斯特制造研究所(MMRI), 麦可马斯特大学,加拿大安大略省汉密尔顿L8S 4L8 1280）
摘要：辅助震动已经越来越多的应用在金属切削过程中。切割时该方法在进给方向上会引起高频率地震幅的震动，也可能降低切削力而改善表面质量和减少刀具磨损。注意这个切削过程是有别于超声加工。本文提出一种驱动力模型来预测的驱动力在6061-T6型振动辅助铝钻切削过程中。该模型包含耕犁力和取决于剪切力的应变率，能够提供比现存模型更加准确的预测。已经报道了用钛氮镀膜的麻花钻做了72次钻孔实验的结果。这种先进的驱动力模型预测与实验结果进行比较，比较表明：使用现有模型的预测值和实验测量的平均值的最大偏差时20%，而利用本文提出的模型预测值和实验测量的平均值的最大偏差时7%。
关键词：钻孔  金属切削  振动辅助  超声波辅助  振动辅助钻  超声波辅助钻

附录一：科技文献翻译
Thrust force model for vibration-assisted drilling of aluminum 6061-T6
Simon S.F. Chang, Gary M. Bone
McMaster Manufacturing Research Institute (MMRI), McMaster University, 1280 Main St. W., Hamilton, Ontario, Canada L8S 4L8
Abstract
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.
Keywords:Drilling  Metal cutting  Vibration assistance   Ultrasonic assistance  
Vibration-assisted drilling  Ultrasonic assisted drilling