Method for manufacturing an assembled camshaft

A method for manufacturing an assembled camshaft for valve-controlled internal combustion engines, the assembled camshaft including a shaft and at least one cam disc with a base circle region and a cam region, the method comprising:

• shrinking the at least one cam disc onto the shaft by a cam-disc recess designed with a defined dimensional overlap with the shaft;
• temporally before said step of shrinking, clamping the at least one cam disc by a clamping device so that a tension force acts on a recess wall region of the cam disc recess, the tension force corresponding to one of a state of stresses and a deformation state of the recess wall region after the at least one cam disc is shrunk onto the shaft;
• and
• machining the at least one cam disc by a running-surface-machining device when the at least one cam disc is clamped by the clamping device,
• wherein the step of clamping includes pushing the at least one cam disc by the cam-disc recess onto a tension tube region of a tension tube of the clamping device, and expanding the tension tube at least in the tension tube region with the cam-disc recess by a corresponding application of force such that the tension tube region is directed outward in the direction of the cam disc and the tension force is exerted on the recess wall region of the cam disc, and the step of expanding comprising acting, by a pressure medium source, on the tension tube by a pressure of a defined magnitude with a pressure medium to expand the tension tube in an elastic deformation range of the tension tube;
• and
• providing the tension tube of the clamping device with a varying wall thickness in at least one of an axial direction and a circumferential direction of the tension tube so that different tension forces distributed over a circumference of the recess wall region are generated during the step of expanding.