提高弹簧钢丝产量的方法

对影响弹簧钢丝产量的因素进行分析,并以生产4.50 mm弹簧钢丝为例对生产工艺进行改进。部分压缩率由原来的17.96%减小到15.91%;拉丝机卷筒冷却水用硬度较低的井水,水压为0.2～0.3 MPa,温度不超过30℃;酸洗、磷化时钢丝的高压水冲洗压力不小于0.60 MPa;中和工艺石灰质量分数为5%～8%,温度大于75℃,并将钢丝在池内摆动3～5次;烘干时要求钢丝表面干燥,但表面磷化层不得烘焦;采取在线涂油方式;给出酸洗、磷化工艺参数,以及成品模具公差、旧模重新改制范围。改进工艺后拉拔速度由3.0 m/s提高到3.5 m/s。

Study on increasing capability of spring steel wire

To analyze the factors affecting capability of online oil coating wire drawing machine, taking producing diameter 4. 50 mm spring steel wire for example to improve the production process. Partial draught decrease from original 17. 96% to 15.91% ; the cooling water for wire drawing machine capstan use lower hardness well water, the water press from 0. 2 MPa to O. 3 MPa, and maximum temperature is no higher than 30℃ ; the rinsing press of high pressure water for pickling and phosphating steel wire is less than 0. 60 MPa; the lime mass fraction is from 5% to 8% in neutralization process, the tem- perature is higher than 75℃ , and swing 3 to 5 times in the pool ; steel wire surface is required dry but phosphating film can be not adustion in drying process. The pickling and phosphating process parameters, the tolerance of finished product die and the scope of old die remanttfacture into new one are given. After process, the drawing speed is increased from 3.0 m/s to 3.5 m/s.