亚洲AV人无码综合在线观看_午夜A级理论片在线播放琪琪_欧洲乱码卡1卡2在线_最新国产乱人伦偷精品免费网站,久久AAAA片一区二区_国产乱人伦av在线a最新_国产国产精品人在线观看_久久无码成人影片_亚洲国产成人精品女人久久久 ,少妇人妻一级A毛片无码,亚洲欧美高清一区二区三区,久久人人爽天天玩人人妻精品,97成人无码免费一区二区中文 ,一区二区三区免费视频播放器_国产亚洲精品AAAA片APP_国产经典三级AV在线播放_国产精品无码A果冻传媒

An annealing process:
Annealing is generally electrical contact, electrode annealed round (touch wheel) will even import the high-current copper wires, copper wire to achieve the preheating and heating. Preheating is copper wire heated to high temperature oxidation will not, generally 250 degrees; heating is heated to annealing temperature copper wire, usually 500 to 550 degrees, so that recrystallization heating section with steam protection against copper oxidation, then after water cooling, the complete annealing (softening) process.
Second, the technical requirements:
1, annealing speed and voltage and pull-up speed should be kept synchronized.
2, annealing and annealing current is proportional to the square of diameter, wire size should be set according to current annealing. Soft annealed copper wire to ensure performance meets GB3953 requirements or desired performance.
3, up tension line storage device by adjusting the pressure of the cylinder.
4, copper wire of diameter deviation should be consistent with the provisions of GB3953.
Third, the narrow diameter of the reasons:
copper produced in the process of drawing hardening, annealing soften, reduce the tensile strength of copper wire, plastic and elongation increase. In the closing line tension under the effect of narrowing the diameter is inevitable. However, should control the diameter of narrow scope, generally not more than 0.02mm (determined according to the size of diameter). If the take-up tension decreases, annealed copper wire between the wheel will shake, poor contact, the phenomenon of emergence points spark, is easy to break and accelerate the annealing wheel damage. Therefore, the choice should be based on the size of diameter up tension.
Four measures:
will reduce the amount of wire, to the aperture on the sizing die.