The defective products and waste products produced by stranding machines and cabling machines mainly have problems such as over-twisting, breakage of inner or outer layer single wires, missing strands, abrasion on the surface of single wires or stranded wires, single wire backspacing, single wire blistering, pits, brittle fracture, arching, presence of foreign objects, excessive wire diameter deviation, wrong stranding direction, snakelike shape, large stranding pitch, unqualified length, loose stranding, wire mixing and crushing, scraping, bruising, and unqualified DC resistance of the conductor core of wires and cables. Among them, over-twisting refers to the phenomenon that the stranded wire is seriously snakelike during the stranding process, or the occurrence of over-twisting.
The reasons for over-twisting of wire and cable stranding products: First, the number of turns of the stranded wire on the traction wheel is insufficient, generally less than 4 turns, and the friction force is too small to cause slipping, resulting in excessive twisting. Second, the take-up tension is too strong or the take-up reel does not rotate, while the rotor is still rotating, thus causing over-twisting.
The method for eliminating over-twisting of wire and cable stranding products: If the outer layer single wire has been severely deformed and damaged seriously and there is no possibility of repair, it can only be cut off. If the single wire is not seriously damaged, the equipment rotor part and the traction part can be separated, and the stranding part can be rotated in the opposite direction of stranding to retract the locally over-twisted part. Then, the core can be repaired by hand, and the excess single wire can be rewound onto the take-up reel. The equipment and the rotor can be tractionally combined. After loosening the over-pressed mold, the wire can be pressed hard, and the mold can be used for manual repair. In this way, the machine can be restarted for production.
