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钢丝在拉拔时,拉丝模工作锥角度增大,会增大钢丝的过量变形,同时也增大了拉拔力,导致钢丝温度升高;拉丝模工作锥角度减小,虽减少了钢丝的过量变形,但增大了钢丝与模子的接触面积,使摩擦力有一定程度的增加,同样导致钢丝温度升高。试验表明:拉拔时钢丝温度升高与钢丝的过量变形和摩擦力都有关。小角度工作锥拉丝模拉拔出来的钢丝性能比大角度工作锥拉丝模拉拔出来的钢丝性能要好,拉丝模寿命也较长。
When the wire is drawn, the working cone angle of the wire drawing die increases, which increases the excessive deformation of the wire and increases the drawing force, which leads to the increase of the wire temperature; the working cone angle of the wire drawing die decreases, though the wire’s Excessive deformation, but increases the contact area of the wire and the mold, so that friction increases to some extent, also lead to increased wire temperature. Experiments show that: when drawing the steel wire temperature and wire excessive deformation and friction are related. Small-angle working cone drawing die out of the wire performance than the large-angle work cone drawing die out of the wire performance is better, drawing die life is longer.