Abstract

Surface texture features such as surface morphology and surface roughness control the corrosion resistance and fatigue resistance of parts. Due to the complex structure of tool and workpiece in milling process, the traditional experimental method is not suitable. Based on the cutting edge line model, the tool trajectory model and the point cloud model of the convex surface workpiece, the simulation model of the surface topography and surface roughness of the convex surface hardened steel mold milling process was established, and the simulation of the surface topography and roughness was realized by combining with the Z-map simulation algorithm. The correctness of the model is proved by the confirmatory experiment. Based on Taguchi method and gray relation analysis method, the sensitivity of surface roughness to machining inclination and cutting parameters is analyzed. It is concluded that the spindle speed has the greatest influence on the roughness and the roll angle has the least influence. The research results provide a theoretical basis for the optimization of cutting parameters in the machining process.

摘要

表面形貌和表面粗糙度等表面纹理特征控制着零件的耐腐蚀性和耐疲劳性。由于铣削加工过程中刀具和工件的结构复杂，传统的实验方法并不适用。基于凸面工件的切削刃线模型、刀具轨迹模型和点云模型，建立了凸面淬火钢模具铣削加工的表面形貌和表面粗糙度的仿真模型，并模拟了工件的表面形貌和表面粗糙度。结合Z-map模拟算法实现表面形貌和粗糙度。通过验证性实验证明了模型的正确性。基于田口方法和灰色关联分析方法，分析了表面粗糙度对加工倾角和切削参数的敏感性。得出的结论是主轴转速对粗糙度的影响最大，滚动角的影响最小。研究结果为加工过程中切削参数的优化提供了理论依据。