| 摘要 |
PROBLEM TO BE SOLVED: To provide a seamless steel tube straightening method capable of correcting straightness at high accuracy. SOLUTION: In the seamless steel tube straightening method, the straightness is enhanced to an end of a material at high accuracy by straightening a seamless steel tube by a two-roll straightening machine constituted in the combination of a multi-roll straightening machine consisting of recessed rolls and a plurality of facing or staggered stands with a pair of recessed-to-recessed rolls or recessed-to-projecting rolls, and a cutting margin of an end portion is reduced in a cutting step. COPYRIGHT: (C)2005,JPO&NCIPI
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