Method of making an external shell of a pump wheel of a hydrodynamic flow unit

摘要

An external shell of a pump wheel of a hydrodynamic flow unit manufactured from a sheet metal pressed part has, in its outlet-side region, an integral connecting sleeve with a cylindrical centering surface and a centered fastening surface extending thereform, and wherein the connecting sleeve is formed by upsettingly deforming, with the fastening surface being given a cylindrical shape and the centering surface being machined to its required diameter after upsettingly deforming.