Patent ID: 6474220
Filing Date: 2002-11-05
Classification: B23P,F02F,Y10T

Abstract:
A process for producing a one-piece cooling channel piston having a continuous annular, closed cooling channel inside a piston head, an annular recess provided between the piston head and a piston skirt, the piston skirt connected to piston bosses attached to the piston head, comprising the steps of:producing a piston blank; forming the annular recess and the cooling channel, which is open towards the bottom, in the piston blank by means of metal cutting; completing an outer contour of the piston; closing the cooling channel which is open towards the bottom; forming an axial height of the cooling channel larger than an axial height of the annular recess; forming an additional recess to the annular recess by means of metal cutting; and starting the production of the cooling channel in an area parallel to a face of the piston boss face.