FORGING METHOD FOR CIRCULAR FORGING STOCK AND DEVICE THEREFOR

摘要

PROBLEM TO BE SOLVED: To provide a forging method for a circular forging stock capable of obtaining a rough article having a unifirm shape in the peripheral direction and an even wall thickness and an excellent fillability and improving the dimensional accuracy of a final product.;SOLUTION: A circular forging stock is axially forged by means of open type upper and lower dies and the forging stock is restricted between the upper and lower dies during the axial rolling reduction or at the bottom dead center and the side face of the forging stock is formed with pressing by a pressing tool for the side face in which two or more metal dies or rolls are arranged synmetrically with respect to the axis in the circumferential direction of the forging stock. It is preferable that the pressing face has a shape corresponding to the side shape of the circular forging. The forging device is provided with upper and lower metal dies reducing axially a circular stock and a pressing tool for the side face of the stock as the minimum condition.;COPYRIGHT: (C)2002,JPO