Abstract: A method for producing a built-up cam shaft and a built-up cam shaft having a shaft are provided. A functional component is produced in a separate manufacturing process and has an internal orifice to receive the shaft. The orifice in the functional component is substantially round to receive the shaft, and an insertion mechanism is provided on the raised areas and/or at the orifice in the functional component, which allow the functional component to be pushed onto the raised areas substantially without shavings being produced. The raised areas partially dig into the orifice and in so doing connect the functional component to the shaft in a non-positive and positive manner substantially by deformation of the material of the functional component in the region of the orifice in the functional component.

Abstract: The invention relates to a method for producing an assembled camshaft and to an assembled camshaft, with at least one functional component that is produced in a separate manufacturing process and has an inner recess for receiving the shaft. The shaft is widened at least in sections in the area in which the functional component is to be secured, and the recess in the functional component for receiving the shaft is widened in the shape of a funnel on at least one side and over at least a section of its axial length, the opening having a diameter which corresponds to at least the diameter of the widened shaft section, the outer surface of the shaft in the longitudinal direction of the shaft axis being provided with ridges which are distributed over the outer circumference of the shaft by material shaping of the outer circumference of the shaft by means of knurling.

Abstract: A drive shaft includes at least two coaxial hollow shafts spaced apart in the direction of the rotational axis of the drive shaft, and each of the hollow shafts has an inner opening. At least one function unit, which includes at least one function part disposed, with reference to the direction of the rotational axis of the drive shaft, between a first and a second of the hollow shafts and first and second engagement sections extending in the direction of the rotational axis of the drive shaft, of which the first engagement section is disposed in the inner opening of the first hollow shaft and of which the second engagement section is disposed in the inner opening of the second hollow shaft. The engagement sections of the function unit are pressed into the inner openings of the hollow shafts with the formation of a particular press fit and the first and second hollow shafts are rigidly connected with one another via the function unit.