method of producing a kolbenkopfes with room and kolbenkopf produced by this method

摘要

The piston head is produced from two main parts (1, 3). The upper part (1) is machined from round steel bar and has an annular recess (1a) which is closed off by a ring (2) seated against shoulders (1c). The lower part (3) for the gudgeon pin is machined from bar of round or other required section. The two parts are joined on spigot faces (1d) and (3c) by friction welding. The closing together of the two parts during welding traps and secures ring (2) in position. ADVANTAGE - Piston head of high strength can be produced.