METHOD AND DEVICE FOR MANUFACTURING ANNULAR BODY CONSISTING OF METALLIC SPECIAL FORM SECTIONAL MATERIAL

摘要

The inventive method produces round parts consisting of profiled metal sections from a straight, profiled extruded section forming a wheel-like shape having butt ends joined together by welding. Bending the straight section into a round part is accomplished by first adjustably prestressing the straight section and then subjecting the prestressed section to a rolling bending operation. For this purpose, the section to be bent is wound either from one side or from both sides around the outside diameter of coordinated rolling dies the rotating rolling dies being able to additionally perform a translatory motion in the direction of the longitudinal axis of the section. The resulting wheel rim has the rim pan integrally joined to the rim ring.