| 摘要 |
In a method for drawing a tube blank while supplying lubricant to an inner surface of the tube blank from a discharge opening of a rod, the lubricant is adhered appropriately to the inner surface both in the circumferential direction of the tube blank and in the longitudinal direction thereof without using any application member such as a core. While drawing a metal tube blank 2 by passing between a die 10 for shaping an outer surface and a plug 11 for shaping an inner surface, the lubricant L is discharged intermittently from a discharge opening 21 provided in an outer peripheral surface of a rod 20 supporting the plug 11 toward an upper region 40 of the tube blank 2 positioned higher than the center of the tube 2 in the up-and-down direction to thereby make the lubricant adhere to a portion of the inner surface of the tube 2 including the highest position P1 of the inner surface of the tube 2.
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