Rotation-symmetrical workpiece production method

摘要

Ring-shaped drawing dies (20) are pushed over the workpiece (10) from both sides of the headstock to reduce and form it into the external toothing (12) of the chuck (11) assisted by a pressure roller (13,14) acting on the workpiece, in this same setting. Before drawing the workpiece is wrapped round the chuck by the roller or pressed onto the chuck on the side adjoining the headstock. During drawing, grooves are formed in the workpiece exterior to radially oppose the bevel inner toothing produced by a drawing die (30) as this rotates relative the headstock. After drawing, the roller works the workpiece exterior. Chuck and headstock are revolved along with the workpiece. The inside diameter of die matches the outside diameter of the workpiece being formed and chuck and headstock can together adjust axially relative the die ring to push this over the work and form this accordingly.