Research On Tool Orientation Optimization Method Of Ball End Mill Based On Milling Force Modeling

Manufacturing is the cornerstone of national development and the backbone of the national economy.Milling is one of the most commonly used machining methods in the manufacturing industry.The study of its milling force and related processing parameters is very important for the optimization of milling.Because the change of the tool axis vector will cause the change of the milling force,which may cause the tool deformation Affect the processing quality of parts.Therefore,it is of great significance to study the influence mechanism of the cutter axis vector on the milling force,and to optimize the cutter axis vector based on this.This paper takes the ball end mill as the research object,establishes its milling force model,analyzes the relationship between the tool axis vector and the milling force,and then proposes a tool axis vector optimization algorithm based on this.The main research contents are as follows:(1)Firstly,this paper studies and analyzes the theoretical basis of cutting force modeling and determines the overall process of cutter shaft vector optimization.Through the analysis of the metal cutting mechanism,a cutting force model from two-dimensional right angle to three-dimensional oblique angle is established;at the same time,the basic method of cutting force modeling and the overall framework process of tool shaft vector optimization are determined.(2)The milling force model of the ball end mill is established,and at the same time,the relationship model between the tool axis vector and the milling force is established.Use the lead and tilt angles to describe the tool axis vector.The milling force model is used to analyze the maximum radial force per revolution of the ball end mill under different tool axis vectors,and the tool axis vector relationship model is established,And establish the model of the vector relationship of the tool axis.(3)Research on the optimization algorithm of tool axis vector.Obtain the CLSF file through the CAM software,extract the required lead and tilt angles data from it;accordingto the obtained model of the relationship of the tool axis vector,the minimum value of the sum of the maximum radial forces at all tool contacts on the tool path is taken as the optimization goal,and the tool axis vector is optimized based on the directed graph,so as to get the revised CLSF file.(4)Carry on the simulation test analysis to the tool axis vector optimization algorithm proposed in this paper.The CAM processing module of UG software was used to generate the NC machining program of the splitter blade,the CLSF file was extracted for the finishing process of one of the blade hubs,and the tool axis vector optimization based on the milling force model was carried out.By comparing and analyzing the optimized CLSF file results,verifies the effectiveness of the algorithm.