To provide a recovery method of resistance to twist-induced breaking of a high strength ultra-fine steel wire, the method being characterized in that the high strength ultra-fine steel wire having 3.0 wire-drawing stress after being patented or 3,000 MPa tensile strength and continuously advancing in the length direction is subjected to repeated operation in which the steel wire is twisted in one direction, then is restored to the original shape or twisted in the reverse direction in a similar way.
The high strength ultra-fine steel wire is given the prescribed twist by using the prescribed number of apparatuses. Each of the apparatus has, as basic constitution, an original wire bobbin 1 for paying out the ultra-fine steel wire being the treating object, a twister 3 for applying a prescribed twist to the steel wire by rotating while incorporating a guide roller 2 for guiding the steel wire so that the steel wire is not come off, and an intermediate reel 4. After winding the steel wire at the suitable turns around the intermediate reel, the next twist in the reverse direction to the first twist, is applied to the steel wire by passing through the reversely rotated next twister. The steel wire is passed through the prescribed number of the apparatuses while adjusting the mutual positions of the apparatuses, the number of revolution per unit time and the speed of a winding apparatus, and thus prescribed twist are given to the high strength ultra-fine steel wires.
JPS569037A | 1981-01-29 | |||
JPH08291330A | 1996-11-05 | |||
JPH08218282A | 1996-08-27 | |||
JPH11241280A | 1999-09-07 |
Hisataka Tanaka
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