【摘要】 变螺旋角螺旋线的切削刃使得微径球头铣刀微铣削过程复杂且实验研究难度较大，对此，提出有限元建模仿真与多元线性回归分析相结合的微铣削过程量化分析和微铣削力预测方法。结合球面螺旋线模型和实测建立微径球头铣刀的三维模型，以此为基础实现全槽微铣削的有限元仿真，并通过实验验证仿真的正确性。针对主轴转速、进给速度与铣削深度三因素，利用正交实验设计方法确定三因素三水平的微铣削仿真方案，得到不同工艺参数组合下的微铣削力数据，通过多元线性回归分析建立预测微铣削力峰值的经验模型，其拟合优度分析表明预测模型具有较好的准确度和可靠性，可用于工艺参数对微铣削力峰值的影响规律分析，优化控制微铣削过程。更多还原

【Abstract】 The cutting edge of the helix with variable helix angle makes the micro milling process of micro ball-end milling cutter complex and difficult to study experimentally.To this end, this paper proposes a quantitative analysis of micro-milling process and micro-milling force prediction method combining finite element modeling simulation and multiple linear regression analysis.The 3D model of micro ball-end milling cutter is established by combining the spherical helix model and real measurement, and the finite element simulation of micro ball-end milling cutter is realized based on it, and the correctness of the simulation is verified by experiment.For the three factors of spindle speed, feed rate and milling depth, the orthogonal experimental design method is used to determine the three factors and three levels micro-milling simulation scheme and obtain the micro-milling force data under different combinations of process parameters.Based on the data, an empirical model for predicting the peak micro-milling force is established by multiple linear regression analysis.The goodness-of-fit analysis shows that the prediction model has good accuracy and reliability, and can be used to analyze the influence law of process parameters on the peak micro-milling force and optimize the control of micro-milling process.更多还原