Five-axis micro-milling technology is widely used in the precision machining process of micro-small parts.As one of the most important parameters in the machining process,milling force directly affects the machining accuracy of the part,tool wear,vibration during machining,etc.In the five-axis fine milling process of the ball end milling cutter,the tool-workpiece contact geometry CWE and the thickness of the undeformed chips are transient,making the solution process complex and difficult.In this paper,the tool-workpiece contact geometry under different forward and roll angles is compre-hensively considered,the mathematical expression of undeformed chip thickness considering the minimum chip thickness,tool runout and workpiece material elastic recovery are derived,and a five-axis micro-milling force prediction model is es-tablished,and the simulation results of the milling force are obtained.Finally,a five-axis micro-milling experiment is carried out to obtain the measured milling force.By comparing the predicted milling force with the measured milling force,it shows that the error between the predicted value of the milling force and the measured value is within 20％,which verifies the ef-fectiveness of the proposed model.
关键词
球头铣刀/刀—工接触几何/五轴铣削/微细铣削力
Key words
ball end milling cutter/cutter-workpiece engagement/five-axis milling/micro milling force
维普
万方数据