| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an apparatus and a method for discontinuously stretching a wire safely at high speed. <P>SOLUTION: A stretching machine 21 includes a roll-type straightening mill 22, a 1st roll-type advancing unit 23, a 1st clamping device 24 which is movable on a hydraulic linear booster 25, a cutting device 29 and a 2nd clamping device 28. The stretched wire 31 is pre-straightened by the roll-type straightening mill 22 and is advanced to the 2nd clamping device 28 by the 1st roll-type advancing unit 23. Subsequently, the wire 31 is held by the two clamping devices 24, 28 and, at this time, the 1st clamping device 24 is moved by the amount of a degree of stretching oppositely to the push-in direction, then the stretched wire 31 is correspondingly cold-deformed. A favourable yield-point ratio is achieved and strain properties are maintained. The final values of the steel stress are detected with a sensor, stored and utilized for the further production of the stretched wire. <P>COPYRIGHT: (C)2003,JPO</p> |
