New automatic short steel bar straightening machine is used for precision straightening of drills under cylinder bar and cylindrical milling cutter,further increasing the straightness and quality of the products.Based on the theory of rotation inflection straightening,a straightening roll system is established as the support at two sides of short steel bar,motivating the short steel bar to rotate.By rolling reduction of roll compactor and variation of position,the straightening is realized.Based on the roll...