等效车削力模型建模方法研究

RESEARCH ON MODELING METHOD OF EQUIVALENT TURNING FORCE MODEL

针对传统车削力预测模型难以考虑刀尖圆弧半径、主切削刃刃口圆弧半径及刀具工作角度导致切削力预测准确性低等问题,建立了一种基于少量车削力实验数据的综合考虑刀尖圆弧、主切削刀刃口圆弧半径及工作角度的等效车削力预测模型。该模型主要是通过车削一次所获得的车削力实验数据及坐标变换矩阵建立了一个以等效主偏角、等效刃倾角、等效法向前角为自变量的三个非线性方程的理想车刀的车削力等效模型,再基于该等效模型建立车削力预测模型,最后通过车削力实验验证了该预测模型的有效性,且预测精度较高。

In view of the low accuracy of cutting force prediction caused by the difficulty of considering the tip arc radius,the main cutting edge arc radius and the tool working angle in the traditional turning force prediction model,an equivalent turning force model considering the tip arc,the main cutting edge arc radius and the working angle based on a small amount of turning force experimental data is established in this paper.The model is a turning force equivalent model of ideal turning tool with three nonlinear equations with equivalent principal deflection angle,equivalent edge inclination angle and equivalent normal forward angle as independent variables through the turning force experimental data and coordinate transformation matrix obtained by turning once.A turning force prediction model based on the equivalent model is established.Finally,the effectiveness of the prediction model is verified by turning force experiments.