Patent ID: 8544442
Filing Date: 2013-10-01
Classification: B23P,F02F,Y10T

Abstract:
1. A method for the production of a multi-part piston for an internal combustion engine, comprising the following steps: producing an upper piston part having a piston crown as well as an inner and an outer support element; producing a lower piston part having a skirt and having pin boss supports and pin bosses connected with the pin boss supports, and an inner and an outer support element; inserting a separate cooling oil collector, having at least one cooling oil opening, into the upper piston part or the lower piston part in such a manner that the cooling oil collector is held in the upper piston part or lower piston part under spring bias; and connecting the upper piston part and the lower piston part in such a manner that the inner and outer support elements of the upper and lower piston parts, delimit an outer circumferential cooling channel and a cavity that is open toward the pin bosses and provided with the cooling oil collector; wherein at least the inner support elements of the upper piston part and the lower piston part are connected with one another by means of a friction welding method that produces a friction weld bead, and wherein the cooling oil collector is held between the friction weld bead and pin boss support.