| 摘要 |
PROBLEM TO BE SOLVED: To provide a planetary skew rolling method by which its various problems are eliminated by at least partially preventing temperature rising to the recrystallization temperature when performing deformation process. SOLUTION: In the method for manufacturing a seamless NE tube especially a seamless copper tube from a continuously cast tube blank or an extruded tube blank and, successively, performing rolling by the planetary skew rolling mill, in order to form a cooling region K in the entry part of the deformation region U in the rolling mill, a cooling medium 15 is supplied to the tube blank 3 by spray facing to the concentricity from all sides at specially high pressure and, at this time, the quantity of heat so that especially the temperature rising to the recrystallization temperature of the rolled copper tube 4 is suppressed at least partially is discharged.
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