Direct observations of tribological behavior in cutting with textured cutting tools
Direct observations of tribological behavior in cutting with textured cutting tools
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DOI：
10.1016/j.ijmachtools.2021.103726
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发表时间：
2021-07-28
影响因子：
14
通讯作者：
Enomoto, Toshiyuki
中科院分区：
文献类型：
--
作者：
Sugihara, Tatsuya;Kobayashi, Ryota;Enomoto, Toshiyuki
正如文献中广泛报道的那样，微织构技术具有显著的潜力，可以通过降低切削力、摩擦、温度和刀具磨损，并进一步通过改善刀具-切屑和刀具-工件界面处的摩擦学行为来改善切削刀具的性能。然而，它也是已知的，纹理对切削刀具表面的影响强烈地依赖于纹理的几何形状和尺寸，并且不加选择地将表面纹理应用于切削刀具通常会导致对切削性能的不利影响，这表明需要改进对表面现象的理解以进一步开发纹理化的切削刀具。本文总结了金属切削领域中刀具表面织构化的最新进展，并继续描述切削刀具的织构化表面如何影响工件材料的变形场，包括主剪切区和次剪切区，通过直接原位观察，使用粒子图像测速分析，以了解在切削过程中织构化表面附近的行为。与织构化的切削刀具的实验结果表明，上的切削力的槽前刀面的效果不同，取决于相对于未变形的芯片厚度的微槽的相对位置。摩擦条件和织构的位置决定了表面织构的性能。讨论了界面摩擦与切屑流动模式之间的联系，证明了表面织构可以改变切屑流动模式，使切屑流动模式从具有冗余变形的分段流动转变为具有较低切削能量的均匀流动。
As widely reported in the literature, the micro-texturing technique has a significant potential to improve the performance of cutting tools by reducing cutting forces, friction, temperature, and tool wear, and further, by improving tribological behavior at the tool-chip and tool-workpiece interface. However, it is also known that the effects of textures on the cutting tool surface strongly depend on the texture geometry and dimensions, and that the application of indiscriminate surface textures to cutting tools often results in adverse effects on cutting performance, indicating that an improved understanding of surface phenomena is required to further develop textured cutting tools. This paper summarizes recent advances in tool surface texturing in metal cutting fields, and continues to describe how the textured surface of a cutting tool influences the deformation fields of the workpiece material, including both primary and secondary shear zones, by means of direct in-situ observation using particle image velocimetry analysis to understand the behavior in the vicinity of the textured surfaces during the cutting process. The experimental results with the textured cutting tool reveal that the effect of the grooved rake face on the cutting force differs depending on the relative position of the microgroove with respect to the undeformed chip thickness. The friction condition and where the texture is located determine the performance of the surface texture. The link between the interface friction and chip flow mode is discussed, and it is demonstrated that surface textures can alter the chip flow mode from a segmented flow with redundant deformation to a steadier homogeneous flow with lower cutting energy.