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METHOD FOR ADJUSTING ROLLING POSITIONS OF ROLLING ROLLS CONSTITUTING THREE-ROLL MANDREL MILL AND METHOD FOR MANUFACTURING SEAMLESS PIPES OR TUBES
METHOD FOR ADJUSTING ROLLING POSITIONS OF ROLLING ROLLS CONSTITUTING THREE-ROLL MANDREL MILL AND METHOD FOR MANUFACTURING SEAMLESS PIPES OR TUBES
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机译:构成三辊芯轧机的轧制辊的轧制位置的调整方法以及无缝管或管的制造方法
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摘要
[Problem to be Solved];A device for adjusting the rolling positions of rolling rolls and restraining poor roll-biting of the front edge part of a pipe material rolled by a three-roll mandrel mill includes pressing-down devices 1 (P1 to P6) for moving rolling rolls R1 to R6 in the rolling direction and a control unit 2 for controlling the pressing-down devices 1. Immediately after the front edge part of a pipe material T has begun to be rolled by the rolling rolls disposed on at least one rolling stand of the rolling rolls R1 to R6, the control unit 2 controls the pressing-down device 1 to move the rolling rolls in the closing direction. Preferably, the rolling rolls disposed on at least one rolling stand of the rolling rolls R1 to R6 in the closing direction are moved at a speed of 16 mm/sec or higher using the pressing-down device 1. 展开▼