NK35(W)×K7类阻旋转钢丝绳研制

Development of NK35(W) × K7 type rotation resistant rope

大吨位机械对钢丝绳承载能力、抗挤压性能、耐磨性能等要求越来越高。NK35(W)×K7类内层压实阻旋转钢丝绳要求公称直径36 mm,公称抗拉强度1 870 MPa,最小破断拉力1 052 k N。介绍了钢丝绳捻制工艺参数的确定。拉丝采用70#、82B热轧盘条,主要生产直径1.93,2.05,1.45,2.00 mm成品钢丝;捻股时钢丝绳各股采用模拉的压实方式。内层绳锻打后实测直径均值26.02 mm,捻距169.12 mm。钢丝绳辊间距一般为捻距的0.90~0.95倍,压弯量为钢丝绳直径的1.7~2.1倍。钢丝绳直径允差控制范围+1%^+4%,钢丝绳实测最小破断拉力1 129k N,满足客户使用要求。

The requirement of large tonnage machinery on wire rope load capacity, compression resistance, wear resistance property is higher and higher. NK35 （W） × K7 type inner layer compaction rotation resistance rope requires nominal diameter 36 mm, nominal tensile strength 1 870 MPa, minimum breaking force 1 052 kN. The determination of wire rope lay process parameters is introduced. Wire drawing production adopts hot rolled wire rod 70, 82B, main finished products steel wire diameter are 1.93, 2.05, 1.45, 2.00 mm, each strand of wire rope adopts die drawing compaction way in stranding. Inner layer rope actual diameter average value is 26.02 mm after forging, lay length is 169.12 mm. The roller spacing of wire rope is 0.90 - 0.95 times of lay length, the intermesh is 1.7 ～ 2.1 times of wire rope diameter. The controlling scope of wire rope diameter tolerance is ＋ 1% ～ ＋4% ,actual minimum breaking force of wire rope is 1 129 kN,which meet the requirements of customers.