| 摘要 |
PROBLEM TO BE SOLVED: To provide a drawing tool for heat drawing easily and quickly drawing a ring member immediately after induction-heating and expanding it, from a shaft. SOLUTION: This drawing tool 10 for the heat drawing is used when an inner lace 40 is drawn from the shaft 30 by surrounding the inner lace 40, which is fitted in the outer circumferential face 30a of a tubular or columnar shaft 30, with a ringed induction-heating coil, induction-heating it and expanding it. The drawing tool 10 for the heat drawing is provided with a ringed spacer 12 formed with a step in its internal circumferential face (almost half of the internal circumferential face is narrowed inward), two claws having L-shaped whole shape, ringed claw holder 14 formed with two recessed portions 14a where the claws are fitted in and retained, a claw pushing ring 18 pushingly fixing the claws retained to the respective recessed portions 14a of the claw holder 14, and a drawing claw 20 to be attached to the induction-heating coil. COPYRIGHT: (C)2008,JPO&INPIT
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