Effect of Low-Frequency Modulation on Lubrication of Chip-Tool Interface in Machining
Effect of Low-Frequency Modulation on Lubrication of Chip-Tool Interface in Machining
复制标题
低频调制对加工中切屑-刀具界面润滑的影响
DOI：
10.1115/1.1829720
复制
发表时间：
2004
影响因子：
2.5
通讯作者：
S. Chandrasekar
中科院分区：
文献类型：
--
作者：
W. Moscoso;Efe Olgun;W. Compton;S. Chandrasekar
本文研究了外加低频调制（≤100 Hz）对加工中流体作用的影响。它示出，在传统的加工中，流体的润滑作用基本上被限制在边缘的芯片工具接触沿着的工具前刀面，在摩擦条件下，在这个面的大部分很少或没有变化。然而，当在切削方向上施加足够振幅的受控低频调制时，润滑作用的有效性显著增强，例如中断切屑-刀具接触。测量结果表明，工具和芯片之间的摩擦系数减少了多达三个因素，在存在这样的调制。切屑材料中靠近前刀面的二次变形区的范围也显著减小。对刀具前刀面的直接观察表明，当施加调制时，流体渗透到切屑和刀具之间的大部分紧密接触区域中。
A study has been made of the effect of an externally imposed, low-frequency modulation (≤100 Hz) on the action of a fluid in machining. It is shown that in conventional machining, fluid action in terms of lubrication is essentially confined to the edges of the chip-tool contact along the tool rake face, with little or no change in the friction condition over much of this face. However, the effectiveness of the lubricating action is significantly enhanced when a controlled low-frequency modulation of sufficient amplitude, such as to break the chip-tool contact, is imposed in the direction of cutting. Measurements show that the friction coefficient between tool and chip is reduced by a factor of up to three in the presence of such a modulation. The extent of the secondary deformation zone in the chip material close to the rake face is also significantly reduced. Direct observations of the tool rake face show that when the modulation is applied, the fluid penetrates into much of the intimate contact region between chip and tool.