A process for the preparation of a forged piston for an internal combustion engine

摘要

The invention relates to a method for the manufacture of a forged piston (10) for an internal combustion engine, on the piston head provided with a combustion chamber (6), in which the piston (10) of a first tubular blank (1) from oxidation resistant steel with at least one fügfläche (3) and a second cylindrical unmachined part (2) using visible steel from warm blacksmith with at least one fügfläche (4) is formed in such a way that the two blanks by means of forging to a piston blank (5) are formed, as a result of which at least the combustion cavity is formed from oxidation resistant steel, and subsequently, the piston blank (5) by mechanical machining to a ready for installation in the internal combustion engine piston is being machined. A relative to the prior art simplified and more cost-effective production of a piston having a reduced tendency to scale at the bowl edge and improved protection against wear by erosion is supposed to be achieved in that the blank (1) with its fügfläche (3) on the fügfläche (4) of the blank (2) is shrunk on, and then, the piston ring (5) is produced by means of forging.