Method of calibrating workpieces with profiled external contour, such as gearwheels - involves forging workpieces, starting from preform, radially inwards over whole generated surface, forging being carried out cold or semi-hot

摘要

The method involves forging workpieces (1), starting from a preform, radially inwards over the whole generated surface. The forging can be carried out cold or semi-hot, and the degree of forging over the height of the generated surface varies. With external gearwheels with a cylindrical preform, a crowned form is produced over the tooth width and/or tooth depth when forging. The preform may be manufactured by hot or semi-hot forging. The semi-hot forging of the preform is carried out by utilising primary process heat.