What are the requirements for the production of steel cored aluminum wire?
1、 First of all, we start from the material selection: the galvanized steel wire used is not allowed to have joints.
2、 Secondly, the requirements of welding points are discussed from the point of production
No joint is allowed for any round aluminum wire in 1.7-strand aluminum strand. Except for the joint before the finished drawing die.
2.7 or more strands of aluminum and round aluminum wires in steel core aluminum wires are allowed to have joints. However, the distance between the two joints on the finished strand shall not be less than 15m. It should be smooth and round at the joint.
The aluminum wire joint shall be resistance butt welding, cold pressure butt welding or resistance cold heading welding.
The resistance butt welded joint shall be annealed, and the annealed length shall be at least 200 mm on each side. The mechanical strength of the joint does not need to reach the mechanical strength of the aluminum wire matrix.
3、 Requirements for stranding
1. The surface of round aluminum wire shall be smooth.
2. It shall be twisted evenly and tightly.
