| 摘要 |
PROBLEM TO BE SOLVED: To provide a roll stand of an internal-gear one-shaft driving type, which can prevent occurrence of a thickness deviation in an metal pipe obtained in three-roll reduction rolling, and does not require reconstruction of the periphery of the stand.SOLUTION: A roll stand 1 includes an input shaft 6 coupled with a power shaft 11 of a reducing mill. In the roll stand, each of roll shafts 3a, 3b, and 3c of three grooved rolls 2a, 2b, and 2c is arranged to be tilted to the input shaft 6, and a mechanism of power transmission composed of a gear group of external gears 8a, 8b, 8c, and 8d and bevel gears 9a and 9b is provided to transmit a power inputted from the power shaft 11 to the input shaft 6, to one roll shaft 3a; in addition, there are provided bevel gears 4a1, 4a2, 4b, and 4c adapted for transmitting the power transmitted to the one roll shaft 3a, to remaining two roll shafts 3b and 3c. |
