Patent ID: 6660407
Filing Date: 2003-12-09
Classification: B23K,B29C,F16D,Y10T

Abstract:
Composite shaft/disc workpiece comprising:a metallic shaft of circular cross section, an outer wall of which has a plurality of steps in a connection region, a diameter of the steps becoming larger in a direction of an axis; and an essentially rotationally symmetrical disc with, in a region of an axis of rotation, a passage hole which, in the assembled position of the disc and shaft, covers the connection region of the shaft in the axial direction, the shaft and disc being connected to one another by friction welding, wherein the passage hole of the disc has a plurality of rotationally symmetrical webs, an inside diameter of which, before the welding of the shaft and disc, fall short by a welding overlap of an outside diameter of the steps located opposite them in the assembled position, and wherein the webs of the disc are connected to the steps of the shaft by friction welding, with the result that an annular cavity is obtained between two adjacent webs.