| 摘要 |
PROBLEM TO BE SOLVED: To provide a drawing device capable of forming a smooth surface to a work in a simple constitution. SOLUTION: A control means of a drawing device is operated so that a forming roller 1 is successively moved in each coordinate from a forming completion position P2 (P21-P2n) of a taper part W2, a position P3 (P31-P3n) of the tip part of the work W and a position P4 (P41-P4n) retreated in the radial direction from the position P3 of the tip part of the work W, is returned to the same coordinate (0, 0) of the a taper part W2, in the next number of times of working, the forming roller 1 is repeatingly moved in each coordinate from a forming completion position P2 of a taper part W2, the tip part P3 of the work W and a position P4 retreated in the radial direction from the position P3.
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