| 摘要 |
PROBLEM TO BE SOLVED: To efficiently form external teeth with a high accuracy without inducing the lowering of a strength. SOLUTION: A workpiece B set on a set table 1 is rotated by the rotating operation of the set table 1 about a rotating axis Y1, and a mold roller 12 is moved in the direction perpendicular to the rotating axis Y2 thereof so as to move closely to the workpiece B so as to press contact tooth part forming parts 15a, 16a, 17a, and 18a with the outer peripheral surface of the workpiece B in order from one with lower tooth height to one with higher tooth height continuously without stopping the rotation of the workpiece B. While the rotating force of the workpiece B is transmitted to the mold roller 12 to rotate the mold roller 12, a plurality of teeth parts of a specified shape are formed steppingly in the outer peripheral surface of the workpiece B by the tooth part forming parts 15a, 16a, 17a, and 18a. |
