Energy dissipation in modulation assisted machining
Energy dissipation in modulation assisted machining
复制标题
调制辅助加工中的能量耗散
DOI：
10.1016/j.ijmachtools.2013.07.007
复制
发表时间：
2013
影响因子：
14
通讯作者：
S. Chandrasekar
中科院分区：
文献类型：
--
作者：
H. Yeung;Narayan K. Sundaram;J. Mann;W. Compton;S. Chandrasekar
调制辅助加工(MAM) -在进给方向上叠加低频（<1000 Hz）调制的加工-的比能量是通过直接测量切削力来估计的。在切割铜和Al 6061T6等延展性金属时，与传统加工相比，可减少高达70%的能量。基于芯片结构和应变、冷加工储存能量、再结晶和芯片形成的有限元模拟的证据表明，这种降低是由于MAM制造的芯片中更小的应变水平。“未变形切屑”的长度与厚度的简单几何比，可以从MAM和加工参数中先验地估计，被证明是导致比能量和变形水平降低的瞬态切屑形成条件的预测因子。
The specific energy in modulation assisted machining (MAM) – machining with superimposed low frequency (<1000 Hz) modulation in the feed direction – is estimated from direct measurements of cutting forces. Reductions of up to 70% in the energy are observed relative to that in conventional machining, when cutting ductile metals such as copper and Al 6061T6. Evidence based on chip structures and strains, stored energy of cold work, recrystallization, and finite element simulation of chip formation, is presented to show that this reduction is due to smaller strain levels in chips created by MAM. A simple geometric ratio of the length to thickness of the ‘undeformed chip’, which can be estimated a priori from MAM and machining parameters, is shown to be a predictor of the transient chip formation conditions that result in the reduction in specific energy and deformation levels.