METHOD FOR PRODUCING A PISTON FOR AN INTERNAL COMBUSTION ENGINE COMPRISING A COOLING DUCT, REALIZED BY JOINING THE UPPER PART OF THE PISTON AND THE LOWER PART OF THE PISTON BY MEANS OF A FORGED-UPSET CONNECTION

摘要

The invention relates to a method for producing a piston of an internal combustion engine, comprising an upper part (10, 30, 50) with at least one recess (12, 31, 51) arranged behind a ring belt (11), wherein the upper part (10, 30, 50) can be connected to a lower part (20, 40, 60) comprising at least one piston skirt (21) and piston-pin bores (22), wherein the invention provides that the upper part (10, 30, 50) has a receiving region (A) and the lower part (20, 40, 60) has a deforming region (V) (or vice versa), and wherein the deforming region (V) is inserted into the receiving region (A) under force and is deformed in such a way that the lower part (20, 40, 60) is immovably fastened to the upper part (10, 30, 50).