扁钻加工过程的分析模型──2任意钻尖角扁钻切削力的计算(英文)

ANALYTICAL PREDICTION OF SPADE DRILLING PROCESS PART 2 DRILLING FORCES WITH ARBITRARY DRILL POINT ANGLE

钻尖的几何参数对扁钻的切削性能有着显著的影响．文中对扁钻主切削刃和横刃的几何角度进行了精确的分析，并建立了主切削刃的轴向力和扭矩的计算模型．在该模型中考虑了切削速度和进给速度沿主切削刃变化的影响，可应用于任意钻尖角的扁钻加工过程的分析．研究和试验表明，主切削刃的轴向力和扭矩的预测值与实际加工的测量值具有较好的一致性．

In this paper, the spade drill point geometric parameters are analyzed in detail. The cutting lips were modeled in the previous part of this study, and are extended to accounting for the dynamic effects of cutting and feed velocities. The models for calculating main cutting edge torque and thrust force in spade drilling are deduced. The force components .obtained from the models are integrated along the lips. These models can be applied to the spade drills with arbitrary drill point angle. Predicted torque and thrust force for the cutting lips are agreed well with the experimental data from spade drilling tests.