How annealing production enameled wires

It is important how to annealing when production enameled wires.

Annealing is designed to make conductor of process because mould drawing grid work and become hard wire changes after a certain temperature of the heat, the molecular lattice rearrangement of the recovery process requirement of softness, at the same time, drawing process to remove residual lubricant conductor in surface, oil, etc, make the wire easy to paint, ensure the quality of the wire enameled wire. The most important is to ensure enameled wire as the winding in use process have the suitable softness and elongation at break, at the same time to improve conductivity.

The bigger the conductor deformation degree, the lower the elongation and tensile strength is higher.

The copper wire of annealing, now commonly used to have three ways: in coil annealing; Wire drawing machine continuous annealing; The southbound charter continuous annealing. In the first two kind of way can meet the paint bag process requirements. In coil can only make the softening annealing copper wire, and to the oil is not complete, because after annealing wire soft, the pay-off increase when bending. Wire drawing machine in continuous annealing, although can reach the copper wire and softening removing surface oil, but after annealing of soft copper wire around to the wire disc formed many crooked. The paint, paint on the charter flights before continuous annealing can not only to soften the purpose to oil, and after annealing of wires are very straight, directly into the paint device, can besmear on uniform film.

Enameled Wire

Annealing furnace temperature according to the length of the annealing furnace, copper wire specifications, line linear velocity to decide. In the same temperature and velocity, the longer the annealing furnace, conductor of the grid work full recovery. In the annealing temperature is lower, the higher the temperature, elongation at break the better, but the annealing temperature is very high will have the opposite phenomenon, the higher the temperature is, the smaller the elongation, and wire surface loses luster, and even easier to brittle fracture.

Annealing furnace temperature is too high, not only affect the service life of furnace, and parking arrangement, break when threading easy burn disconnected. Ask to return the highest temperature of the fire control at 500 ℃ or so. The second section of the stove temperature control form, in the static and dynamic temperature of the approximate location choice of temperature control point is effective.

Copper under high temperature easy oxidation, copper oxide is very SuSong, paint film can't firm attached in the copper wire, copper oxide to paint film aging have a catalytic effect, flexibility, hot wire enameled wire to impact, thermal aging have adverse effects. To copper wire not oxidation, will make the copper wire in high temperature with the oxygen in air contact, so the protection gas. Most of the annealing furnace head a water seal, another head open. Annealing furnace in the sink water has three functions: closed the oven, cooling conductor, steam do happen protection gas. When driving in just because the steam pipe annealing rarely, cannot promptly eliminate air, can go to a small amount of alcohol annealing tube irrigation water solution (1-1). (cut note not pure alcohol and control filling use)

The water quality is very important annealing sink. The water will make lead does not clean impurities influence painting, unable to form the smooth film. Use of chlorine water amount should be less than 5 mg/l, conductivity less than 50 μ Ω/cm. Chlorine ion in the surface of the copper wires attached after a period of time will corrosion copper wire and coatings, enameled wire in the paint film in wire surface produces black spots. To ensure the quality must be regularly clean sink.

The water temperature also have requirements. High water temperature to happen to the water vapor, the protection of annealing copper wire, leave the leads of the water tank with water not easily, but to wire cooling disadvantage. Although a low temperature cooling effect, but the wire with a lot of water, adverse to paint. Usually, the thick line low some water, fine line of some high water temperature. When the copper wire in the surface water is made from vaporizing splash of voice, the show high temperature water. General thick line control in 50 ~ 60 ℃, the center line in 60 ~ 70 ℃ control, fine line control in 70 ~ 80 ℃. Fine line for speed, with serious problems of water, appropriate USES hot air drying.

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