预张拉管式捻股机生产高速电梯用钢丝绳

预张拉管式捻股机用于高速电梯用钢丝绳的生产,能反馈钢丝绳张力的大小,实现恒张力控制。以生产8×19S+NF—8.0,1 370/1 770 MPa双强度电梯用钢丝绳为例介绍研制过程:原料选用SWRH57A盘条;热处理加热温度由960℃调整至980℃,并降低收线速度;铅淬火温度选择550℃;采用水箱拉丝机多道次小压缩率的工艺进行拉拔,道次压缩率控制在15%以内;钢丝绳的捻距为钢丝绳公称直径的6.4倍,预变形中心距为钢丝绳捻距的88%,后变形中心距为7～9 mm,定径辊直径8 mm;选择含油率为10%～15%的优质麻芯。成品按GB 8903—2005《电梯用钢丝绳》检测全部合格,并能满足用户的特殊要求。

Steel wire rope for high-speed elevator made by pre-tension tubular stranding machine

Pre-tension tubular stranding machine is using for high-speed elevator＇ s steel wire rope＇ s production, which can feedback steel wire rope＇ s tension and realize to control the constant tension. To introduce the process by taking the production of 8× 19S ＋ NF--8.0,1 370/1 770 MPa dual-tensity elevator steel wire rope as example： raw materials use SWRH57A wire rod, heating temperature adjust from 960 ℃ to 980℃ during heat treatment, and decrease the speed of take-up; patenting temperature choose 550℃ ; to draw by using wet wire drawing multi-pass and small compression ratio, and to control the pass compression ratio under 15% ; Steel wire rope＇ s lay pitch is 6.4 times of its nominal diameter, pre- deformation center distance is 88% of steel wire rope＇s lay pitch, post-deformation center distance is 7 -9 mm, diameter of size roll is 8 mm; 10% -15% oil content＇ s high-quality hempcore. Finished products test by GB 8903--2005 Steel Wire Rope for Elevator and all qualified, and can satisify special requirement of users.