The past two years, our factory produces more domestic and export steel wire armored cables, for mass production of such cables in terms of technology or the technical level of the operator are quite mature, but in the production of a longer length of steel wire armored cable When we often encounter the wire from the lantern-like phenomenon, thus giving rise to production and sales of a lot of trouble, after our exploration and serious consummation that the production of steel wire armored cable should pay attention to the following questions:
1, cable process
For the three-core cable steel armor, cable into the requirements must be round, uniform adjustment of the tension of the core, which laid the foundation for the next wire armoring process. Due to the wire armor, the wire and the cable core contact area is small, the wire into the cable core has an inward pressure, if the tension adjustment of the insulated wire core is not uniform, the cable is not round, easy to cause in the wire armor Steel back shares, loose stock, lantern-like, wire armor is not round the whole, armored wire is not straight, which brings trouble to the finished product loading and user laying, therefore, the manufacturer in the production of steel armor line Must pay attention to this process from the cable. In particular, pay special attention to the cable into the cable when the beginning and end of the insulated wire core must use the same outer diameter of the pull line, so as to ensure that the insulated core and into the cable core cable is always under the action of tension into the cable, so cable into the cable Core wire will not produce internal stress, internal stress in steel wire armor will not show;
2, steel armor (with 2.5 m or 3.15 m crawler traction machine as an example)
â‘ first wire take-off wheel must have tension, and tension adjustable;
② The wire diameter is selected according to the assumed diameter of the cable. The number of the wires is determined according to the outer diameter of the cable calculated in theory. In actual production, the number of wires can be determined according to the actual outer diameter of the cable core May be appropriate in the production process based on the increase or decrease 1--2, once the root number is determined the number of the production of this batch of cables to determine the foreign technical parameters in the cable bidding fill in the diameter can be directly filled, but the number of roots Can not fill in the fixed value, there may be ± 2 conditions, so for the manufacturer in terms of actual production process may have to adjust the margin;
â‘¢ wire in the sub-board sub-line must be uniform, when entering the line mold and wire through the preform-type pre-shaped device, and the distance must be consistent with the wire pitch;
â‘£ parallel mold must be selected within the hole roughness of 0.025 steel mold material parallel mode, the hole size should not be too large should not be too small, too tight tightness of steel wire is too small, increase the traction of steel wire, wire can not Smooth continuous operation, and easy to damage the surface of the wire;
⑤ wire armor cable core beginning and end must have the same outer diameter of the pull line, so that the line is always under the action of tension loaded armor, will not produce a line at the beginning and end of the internal stress, while the beginning and end of the wire end Must be bundled to prevent the occurrence of wire slippage;
â‘¥ steel wire armor, usually double-layer non-woven fabric wrapped around the tightening, because the wire is very flexible in the upper reel, the bending effect, easy to tie the outer bandage Open, or because of the back layer and the interlayer or interlayer between the core friction easily rub the cable tie, which if not handled well will be after the extrusion process brought great trouble.
In addition, the manufacturer of cage stranding equipment, it is recommended to use cage stranding equipment for steel loading armor, so that due to the cage stranding machine can armored steel wire back and forth, so that the internal stress within the wire will be greatly reduced Small, so that there will be no lantern phenomenon, in addition to the cage wire equipment on the pay-off reel tension is easy and very uniform, so when loaded armor, jumper and backs will not appear phenomenon, you can greatly Improve production efficiency and product quality.
3, jacket extrusion process:
When squeezing the outer sheath, according to the pitch of the wire and the length of the cable, the starting end of the cable is rotated a few turns in the direction of the steel wire to connect with the pulling wire, and the steel wire rod is locked at the pulling connection so as to prevent the cable from being damaged due to Under the action of wire stress, the rotation is loose, so that during the extrusion process, the wire plays a role of lantern. The rod can not be removed until the wire is pulled.
All in all, the manufacturer of the steel wire armor cable can pay attention to the three processes of forming the cable, installing the steel wire armor and extruding the outer sheath, so as to prevent or reduce the wire lantern phenomenon occurring in the produced steel wire armor cable.
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