Annealing of Xinyu Enameled Copper Wire is currently us […]
Annealing of Xinyu Enameled Copper Wire is currently used in three ways: disk annealing; continuous annealing on a wire drawing machine; continuous annealing on a lacquer coater. The first two methods can not meet the requirements of the enameling process. The coil annealing can only soften the copper wire, but the oil removal is not complete. Since the wire is soft after the annealing, the bending is increased when the wire is laid. Continuous annealing on a wire drawing machine can soften the copper wire and remove grease on the surface, but after the annealing, the soft copper wire is wound on the wire tray to form a lot of bends. Continuous annealing before lacquering on the lacquer coater not only achieves the purpose of softening and oil removal, but the annealed wire is straight and goes directly into the painting device and can be coated evenly.
The temperature of the annealing furnace is determined according to the length of the annealing furnace, the specification of the copper wire, and the line speed. At the same temperature and speed, the longer the annealing furnace, the more complete the recovery of the conductor lattice. When the annealing temperature is low, the higher the furnace temperature, the better the elongation, but the opposite phenomenon occurs when the annealing temperature is high. The higher the temperature, the lower the elongation, and the surface of the wire loses its luster and may even be brittle. .
The temperature of the annealing furnace is too high, not only affecting the service life of the furnace, but also it is easy to burn and break the wires when parking and cutting and threading. The maximum temperature of the annealing furnace is required to be controlled at about 500°C. Using a two-stage temperature control mode for the furnace, it is effective to select the temperature control point at a location where the static and dynamic temperatures are similar.