Constant velocity joint comprising integral internal joint part and method for producing such a constant velocity joint

A method for producing a constant velocity joint, comprising an external joint part (1) comprising internal ball tracks, an internal joint part (2) comprising external ball tracks assigned to the internal ball tracks, and of balls (4) held in a ball cage (3), wherein the external joint part (2) can be connected to a connecting part and is sealed by means of a closure cap (7) on the side facing this connecting part, and the internal joint part (2) is embodied as integral internal joint part (6), which is connected to a shaft piece (5) in a destruction-free, permanent manner and is sealed on this side towards the external joint part (1) by means of a flexible sealing element,

• wherein, on its free end, which protrudes from the sealing element (10), the integral internal joint part (6), which is connected to the shaft piece (5), is provided with a welding attachment (15) for accommodating an adapter (6), wherein the outer diameter of this welding attachment (15) is larger than the smallest outer diameter of the integral internal joint part (6),
• wherein the integral internal joint part (2) is hardened,
• wherein the sealing element (10) is mounted over the end of the integral internal joint part (6), which has the smaller outer diameter, and is connected to the external joint part (1) and
• wherein the adapter (16) is subsequently welded to the integral internal joint part (6) in the area of the welding attachment (15).