How about turning an elliptical cylindrical on an ordinary lathe?

Machining elliptical cylindrical on a regular lathe is usually done by the cyclone turning method. The workpiece passes through the center of the cyclone body. And the rotary center of the workpiece and the rotating plane of the tool on the cyclone disk is a pinch angle a, where cosa = a / b a represents the short axis of the ellipse. b represents the long axis of the ellipse. Cyclone disk has another motor driven rotation, the tool to get the tip of the radius of rotation is equal to the size of the long axis of the ellipse of the workpiece being machined. Its adjustment method can be carried out by moving the position of the turning tool. In order to improve the processing efficiency and surface quality, can be installed in the cyclone disk 2 or more tools, respectively, for roughing and finishing. It must also be noted that the intersection of the tool tip rotary centerline and the centerline of the workpiece should be in the rotary plane of the tool tip point, otherwise the offset center is too large, there will be intermittent cutting, and the workpiece will be scrapped. In the cutting process, the workpiece can never be rotated. This method is generally only applicable to the processing of elliptical short axis of 80mm below the workpiece .