仿生微织构对刀具切削性能影响的有限元分析

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Bionic tribological studies have shown that high-performance micro-texture surface has a good frictional performance, in this article, the two-dimensional cutting processes of micro-texture and non-micro-texture carbide tools are analyzed based on ABAQUS. Simulation results show that the groove micro-texture surface with appropriate size can effectively improve the stress distribution in the friction process between tool and chips, and can reduce the phenomenon of stress concentration, which improves the wear property of tool. At the same time, it can reduce the cutting force up to 20%. Then, groove micro-textures with different widths are made on the rake face of the YG8 carbide blades by using laser. The experiments indicate that groove micro-textures can effectively reduce the friction coefficient, and the effects of different widths are not the same.仿生摩擦学的相关研究表明，高性能的表面做织构具有良好的减摩抗磨性能。本文利用ABAQUS软件，对无微织构和有微织构硬质合金刀具的二维直角切削过程进行了有限元分析。仿真试验表明：一定尺寸的沟槽微织构可以有效改善刀-屑摩擦过程中的应力分布状况，减少应力集中现象，既提高了刀具的减磨性能，同时还可以降低20％左右的功削力然后，采用激光加工方法在YG8硬质合金刀片的前刀面置入不同宽度的沟槽微织构，在一定载荷条件下进行摩擦磨损试验。试验发现：沟槽型微织构可以有效地降低硬质合金刀面的摩擦系数，并且不同宽度的沟槽其减摩效果是不一样的。