SIMPLE FRICTION WELD

摘要

The invention relates to a cooling channel piston (1) for an internal combustion engine, comprising a piston bottom (2) and a piston shaft (3) that is joined thereto by means of a friction welding process, the piston bottom (2) and the piston shaft (3) jointly forming a cooling channel (8). According to the invention, an annular wall (13) which radially delimits the cooling channel (8) towards the outside is formed by the piston bottom (2) and/or the piston shaft (3). Said annular wall (13) can be sealed using a welding process once the piston bottom (2) and the piston shaft (3) have been joined together.