| 摘要 |
PROBLEM TO BE SOLVED: To improve workability and to make the cost of equipment inexpensive by providing a process for threading a wire in the state where the roller gap of cassette roller dies is opened not smaller than the diameter of the wire and process for adjusting the clearance of the cassette roller dies into an object dimension while heating the threaded wire to a temp. not higher than the transformation temp. and coiling it around a drum. SOLUTION: In the state where the roller gap of the cassette roller dies 2 is opened not smaller than the diameter of the wire 4, threading is executed to an induction heating coil 1 and cassette roller dies 2. The tip part of the threaded wire is fixed to a prescribed place of the coiling drum 3 and, while continuously heating the wire 4 at the temp. not higher than A1 transformation temp. with the induction heating coil, the wire 4 is coiled around the coiling drum 3. While cooling the wire 4 at the outlet of the cassette roller dies 2, warm working is executed by narrowing the roller gap of the cassette roller dies 2 and adjusting the gap into the object dimension of about 1.85ϕ, for example.
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