Finite element simulation and experimental investigation on cutting mechanism in vibration-assisted micro-milling
Finite element simulation and experimental investigation on cutting mechanism in vibration-assisted micro-milling
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DOI：
10.1007/s00170-019-03402-0
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发表时间：
2019-12-01
影响因子：
3.4
通讯作者：
Huo, Dehong
中科院分区：
文献类型：
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作者：
Chen, Wanqun;Zheng, Lu;Huo, Dehong
在振动辅助铣削中，在微铣削过程中沿进给和/或横向进给方向施加振动，瞬时切削厚度可以显著改变。因此，其切削机理也发生了巨大变化。本文通过有限元模拟和实验研究了振动辅助微细铣削的切削机理。采用Johnson-Cook材料模型，建立了镁合金振动辅助微细铣削过程的有限元模型。从尺寸效应和材料去除机理两方面对振动辅助微铣削进行了研究。结果表明，振动频率对切削机理有重要影响，如抑制毛刺的形成，减少切削力和刀具磨损。将有限元模拟结果与常规微铣削进行了比较，并与实验结果进行了验证。
In vibration-assisted milling, vibrations are applied in feed and/or cross-feed directions during micro-milling process, and instantaneous cutting thickness can be changed significantly. As a result, its cutting mechanics also change dramatically. This paper investigates the underlying cutting mechanism of vibration-assisted micro-milling by using finite element (FE) simulations and experiments. A finite element model of vibration-assisted micro-milling process is established for magnesium alloys machining with the Johnson-Cook material model. The vibration-assisted micro-milling is investigated in terms of size effect and material removal mechanism. It is found that vibration frequency has a significant influence on the machining mechanism, e.g. suppression of burr formation and reduction of cutting forces and tool wear. The FE simulation results are compared with the conventional micro-milling and verified by the experimental results.