Metal spinning pursuant to DIN 8584 consists of transforming a circular blank by chipless forming with a roller into a rotationally symmetrical hollow body.
Metal spinning in detail
A preform or blank is clamped against a spinning chuck and set in rotation. The spinning roller forms the preform step by step until the material has been brought onto the spinning chuck. Rotating tools generate a variety of surface lines on the work piece, which is also rotating, so that the final form of the work piece is generated and the surface is smoothed. A variety of other, additional machining processes can be performed in the same clamping setup, such as the subsequent profiling of contour areas, the separation of marginal or base areas, the bordering of external edges, etc. In this way, virtually any type of hollow body can be produced with complicated or complex geometries, very narrow tolerances and excellent surfaces.
Advantages of metal spinning
Metal spinning displays obvious advantages in terms of cost-effectiveness and flexibility. Savings in material and the possibility of creating any kind of form changes at low tool cost and in fast production runs make metal spinning one of the most competitive alternatives to other processes, such as deep drawing. The high work-hardening rate enables the use of more cost-effective materials, while nevertheless guaranteeing the stability of the finished article and the required increased strength. This results in an enormous savings potential in terms of material and weight. Metal spinning tools (spinning rollers) are primarily not bound to the geometry of the work piece. This means that changes in geometry can be made in virtually any areas of the work piece by implementing simple programming changes.