阶梯钻钻削钛合金实验

采用自主磨制的阶梯钻对钛合金进行钻削实验,并与普通麻花钻进行对比。分析了不同加工参数下的钻削力、切屑形态、孔径、孔壁表面粗糙度以及孔出入口毛刺。实验结果表明:钻削力随着主轴转速的增大而减小,随着进给量的增大而增大。相比普通麻花钻,阶梯钻产生的钻削力更小,切屑尺寸更小,排出顺畅,孔径值接近于钻头直径,孔壁表面粗糙度值更小,孔出入口毛刺少。

Experiment of Step Drill Drilling of Titanium Alloy

The drilling experiment of titanium alloy was carried out by using the self-grinding tool and compared with the ordinary twist drill. The drilling force, chip shape, pore size, pore wall surface roughness and burrs at entry and exit of hole were analyzed under different processing parameters. The experimental results show that the drilling force decreases with the increase of the spindle speed and increases with the increase of the feed rate. Compared with the ordinary twist drill, the drill force produced by the step drill is smaller, the chip is small and discharge from hole is smooth, the aperture value is close to the drill diameter, the surface roughness value of the hole wall is smaller and the burrs at entry and exit of hole are not obvious.