| 摘要 |
A stretching machine (21) for the production of discontinuously stretched wire (31) comprises a roll- type straightening mill (22), a first roll-type advancing unit (23), a first clamping device (24), which is capable of being moved on a hydraulic linear booster (25), and a second clamping device (28), to which a cutting device (29) is attached. A pushed-in rolled wire (31) to be stretched is prestraightened by the roll-type straightening mill (22) and is advanced to the second clamping device (28) by the first roll- type advancing unit (23). Subsequently, the wire (31) is held by the two clamping devices (24 and 28), the first clamping device (24) being moved opposite to the push-in direction by the amount of a degree of stretching and correspondingly cold-forming the rolled wire. By means of the apparatus, a favourable yield- point ratio is achieved, the strain properties being maintained. By means of a sensor, the final values of, for example, the steel stress are detected, stored and used for the further production of the stretched wires.
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