| 摘要 |
PROBLEM TO BE SOLVED: To provide a manufacturing method, which can freely obtain a spiral wire rod with an arbitrary pitch in the longitudinal direction of the wire rod and a spiral radius in the face orthogonal to the pitch, and a working device with high efficiency and high controllability which can effectively execute the method. SOLUTION: The method for manufacturing the spiral wire rod are composed of two stages of a pre-stage and a post-stage. Die parts, in which each pass line PL1, PL2 of the pre-stage and the post-stage has an angle each other, is used. The wire rod is fed in the pass line direction through from the pre-stage die part 20 to the post-stage die part 30 while rotating the post-stage die part 30 in the face vertical to the pre-stage pass line PL1. The pre-stage die part 20 has a plurality of pre-stage roller dies 24 capable of fixedly and freely rotating. The post-stage die part 30 has a housing 31, which is mounted freely rotatably to the pre-stage die part 20, and a hole die 33d which is mounted to the housing 31 and guides the wire rod. At least any one of the values among a wire rod feeding speed, a rotational speed of the post-stage die part 30, and the pass line angle is adjusted. COPYRIGHT: (C)2005,JPO&NCIPI
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