Abstract
Whirling cut has been applied to machining of worm and ball screws for motion controls. The whirling cut, in which the tool and the workpiece rotate simultaneously with an eccentricity between the centers of the workpiece and the tool rotations, has advantages in the tool life, the surface finish and the chips control compared to the general threading. The cutting force in the whiling process changes in the tool rotation angle with the cutting thickness. In order to analyze the cutting force in whiling, a whirling machine was developed to measure the cutting force. The cutting tests, then, were conducted to make a force model in the whirling cut. The fore model was verified with the identified force parameters.
