There is a process of the magnet wire manufacturing process-annealing, the purpose is to make the wire hardened due to the change of the crystal lattice during the drawing process of the mold. By heating at a specified temperature, the molecular lattice can be rearranged to restore the softness required by the process. , To remove the residual lubricant and oil stains on the surface of the conductor during the stretching process, making the conductor easy to paint and ensuring the quality of the enameled wire. More importantly, the annealing process ensures that the magnet wire of the winding has suitable softness and elongation during use, which helps to improve the conductivity.
At present, most magnet wire manufacturers use fully automatic production lines to perform successive annealing before painting on the enameling machine. Not only can it achieve the purpose of softening and degreasing, but also the annealing wire is straight and directly enters the painting device. Apply a uniform paint film.
The annealing process has three elements: annealing furnace, furnace temperature, and water quality of the annealing furnace's tank.
The furnace temperature is at the same temperature and speed, the longer the annealing furnace, the more fully the recovery of the conductor lattice. When the annealing temperature is low, the higher the furnace temperature, the better the elongation; but when the annealing temperature is high, the opposite phenomenon will occur. The higher the temperature, the smaller the elongation, and the surface of the wire loses its luster, and is easy to break. . The temperature of the annealing furnace is too high, in addition to affecting the service life of the furnace, it is also easy to burn when shutting down and threading. The higher temperature of the annealing furnace is required to be controlled at about 500°C.