Apparatus and method of forming cylindrical work piece

摘要

A forming apparatus forming part of or the entire circumference of a cylindrical work piece into a circular or deformed circular shape, such as an ellipse, etc. A spindle mechanism has a processing tool R mounted at the tip of the spindle, and a holding mechanism holds the cylindrical work piece W disposed in a way to face the spindle mechanism. An axial shifting means for shifts the spindle mechanism and the holding mechanism relatively in the axial direction of the spindle. A shifting motion means enabling the holding mechanism to make prescribed shifting motion, and a control mechanism drives the axial shifting means and shifting motion means in linkage with each other.