Drilling force model for forced low frequency vibration assisted drilling of Ti-6Al-4V titanium alloy
Drilling force model for forced low frequency vibration assisted drilling of Ti-6Al-4V titanium alloy
复制标题
Ti-6Al-4V钛合金强制低频振动辅助钻削钻孔力模型
DOI：
10.1016/j.ijmachtools.2019.103438
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发表时间：
2019-11-01
影响因子：
14
通讯作者：
Fu, Yucan
中科院分区：
文献类型：
--
作者：
Yang, Haojun;Ding, Wenfeng;Fu, Yucan
强迫低频振动辅助钻削是一种重要的机械加工方法，其钻削推力和扭矩的预测是优化钻削参数的必要条件。然而，钻削力预测仍然是一个问题，在强制LFVAD。本文提出了一种新的分析模型，预测钻削推力和扭矩，通过合并振动的振幅和频率校正，钻头工作角，钻削力在不同的切削唇位置，并将其转换为推力和扭矩。特别地，这里研究的钻削力包括横刃处的压痕力、切削力、弹跳力、主刃的犁削区域中的犁削力以及主刃的其余部分中的切削力和弹跳力。还考虑了钻头微位移。最后，通过对Ti-6Al-4V钛合金的钻削实验，验证了该模型预测的推力和扭矩的最大值、平均值和最小值的有效性。最大推力、最大扭矩、平均推力和平均扭矩的预测误差分别为12%、9%、6.5%和10.1%。利用该预测模型分析了振幅对钻唇沿着不同位置切削力的影响。提出了临界断屑幅度的概念，并给出了钻削参数的优化实例。
Forced low frequency vibration assisted drilling (forced LFVAD) is an important machining method, in which the prediction of drilling thrust force and torque is necessary to optimize the drilling parameters. However, drilling force prediction remains a problem in forced LFVAD. This article presents a novel analytical model that predicts the drilling thrust force and torque, by incorporating the vibration amplitude and frequency correction, drill working angle, drilling forces within different cutting lip positions, and their transformation into thrust force and torque. In particular, the drilling forces investigated here include indentation force at chisel edge, chipping force, bouncing force, ploughing force in the ploughing area of the primary edge, and chipping and bouncing forces in the remaining part of the primary edge. Drill micro-displacement is also considered. Finally, the maximum, mean, and minimum values of the thrust force and torque predicted using this new model are verified as valid by performing a the drilling experiment of Ti-6Al-4V titanium alloy. The prediction error of maximum thrust force, maximum torque, mean thrust force and mean torque can reach 12%, 9%, 6.5%, and 10.1%, respectively. The effect of vibration amplitude on the cutting force at different positions along the drill lip is analyzed using the prediction model. Critical chip breaking amplitude is proposed and an optimization case of drilling parameters is presented.