Patent ID: 9249692
Filing Date: 2016-02-02
CPC Classification: B23P,F01L,Y10T

Claim Text:
1. A camshaft for an internal combustion engine comprising: a shaft; and at least one cam thermally joined to the shaft via a joining surface on the at least one cam and a joining surface on the shaft wherein the joining surface on the at least one cam and the joining surface on the shaft each has at least partially a predefined roughening/roughness, at least a portion of which has a defined pattern in the form of a 3-dimensional code that has information about the respective one of the shaft and the at least one cam, and that is configured to increase torque transmission capability between the shaft and the at least one cam; wherein the joining surface on the at least one cam includes at least one surface structure with a predominant direction, and the predefined roughening/roughness of the joining surface on the at least one cam includes at least one non-directional surface structure, wherein the at least one non-directional surface structure is superimposed on the at least one surface structure with a predominant direction, wherein the shaft is a drawn and not further processed pipe having an external diameter with a tolerance of a maximum of +/−0.07 mm, and wherein a surface and a depth of the 3-dimensional code are each used as an information plane.