| 摘要 |
PURPOSE:To produce a wire having a desired small diameter with a compact device by twisting the wire led out of one rolling die, shifting the wire to the next rolling die while deviating the direction and thereafter subjecting the wire to multi-stage rolling with 2 stands. CONSTITUTION:A rolling mill 10 is constituted of the 1st stand 21 consisting of rolls 12-20 which have annular grooves 12a-20a forming calibers of sizes different from each other and are disposed into multi-stages and the 2nd stand 21' constituted in the same manner as with the 1st stand 21. The annular grooves 12a-20a and 12'a-20'a are so set that the sizes are successively smaller upward. The wire is twisted about 90 deg. and is rolled after the direction thereof is deviated from the rolling direction of the previous rolling mill in the stage of leading the wire out of the rolling dies 22', 24, 26' of one stand and shifting the wire to the next rolling dies 24', 26, 28' of said stand. The wire is passed through the final dies, by which the wire having a prescribed diameter is obtd. The rolling is executed at a large reduction rate of area without requiring intermediate annealing according to the above-mentioned method. |
