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Research on Deformation Behaviors and Surface Quality Model at High-speed Cutting

机译：高速切割变形行为与表面质量模型研究

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The cemented carbide cutting tools were experimentally performed to dry cut high manganese steel (ZG Mn13) at high speed, and the high-speed cutting behaviors and the effect of cutting parameters on cutting quality were investigated, and predict model of surface roughness for high-speed cutting was established. The results show that the surface roughness first increases and then decreases with the cutting speed increase and feed rates decrease, and finally trends to be stable; the surface quality of high-speed cutting is obviously superior to that of conventional cutting. From the macro-graphs and micro-graphs of chips, the chips shows continuous belt-shaped macroscopic appearances, whereas the top surface of the chips reveals jagged microscopic characteristics, with burn and adhesion shear characteristics on the bottom surface. Work hardening and high-temperature softening simultaneously affect the shear deformation. When the effect of the former is dominant, the belt-shape characteristics are visible; when the effect of the latter is dominant, the jagged characteristics are notable and the belt-shape characteristics are weak. This indicates that the adiabatic shear slip occurs. The cutting parameters are reasonably selected to obtain ideal cutting quality and chip shape. The predicted model of the surface roughness provides an important reference for the surface cutting quality of high-speed cutting or the selection of cutting parameters according to cutting quality.
机译：通过高速进行固化的硬质合金切削刀具以进行干切割的高锰钢（Zg MN13），并研究了高速切割行为和切割参数对切割质量的影响，并预测高度的表面粗糙度模型速度切割成立。结果表明，表面粗糙度首先增加，然后随着切割速度的增加而降低，饲料速度下降，最后趋势稳定;高速切割的表面质量明显优于传统切割。从芯片和微图的芯片，芯片显示连续的带形宏观外观，而芯片的顶表面揭示了锯齿状的显微镜特性，底表面上的燃烧和粘附剪切特性。工作硬化和高温软化同时影响剪切变形。当前者的效果主导时，带形特性可见;当后者的效果优势时，锯齿状的特性是值得注意的，并且皮带形特性较弱。这表明发生绝热剪切滑动。切割参数合理选择，以获得理想的切割质量和芯片形状。表面粗糙度的预测模型为高速切割的表面切割质量或根据切割质量选择切割参数提供重要参考。

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