| 摘要 |
PROBLEM TO BE SOLVED: To provide a roller burnishing device capable of simultaneous centerless rolling compaction working of the inner and outer peripheral surfaces of a cylindrical pipe toe be worked. SOLUTION: The roller burnishing device is provided with a mandrel 4 which is arranged in the cylindrical inside of roller frames 5, 6 and which rollably abuts on the internal working rollers 2, and a cylindrical head 3 which is arranged so as to surround the outer periphery of the roller frames 5, 6 and which rollably abuts on the outer peripheral surface of external working rollers. The internal working rollers 2 and the external working rollers 1 are structured in pairs to be positioned on the same radials with respect to a center shaft to be faced with each other, and the number of both the rollers is the same. The internal working rollers 2 and the external working rollers 1 are arranged to have a specified feed angle by which the feed quantity of the cylindrical pipe to be processed is the same on the inner and outer peripheral surfaces. In relation to the direction of relative rotation, the roller frames 5, 6 are rotated-driven, the mandrel 4 is rotatably held, and the head 3 is fixed. |
