Patent ID: 9566670
Date: 2017-02-14
CPC Classifications: B23K,B23P,F02F,Y10T

Claim:
1. A method, comprising: providing a piston crown defining at least in part an upper combustion bowl surface, the piston crown including an inner crown mating surface and an outer crown mating surface; moving the crown mating surfaces in proximity to an inner skirt mating surface and an outer skirt mating surface defined by a piston skirt, bonding the crown and skirt together in a resistance brazing process wherein the crown and skirt cooperate to define a cooling gallery extending about a periphery of the crown, such that a first conductive path is formed to one side of the cooling gallery and a second conductive path is formed to another side of the cooling gallery by initiating an electric current along the first and second conductive paths between the crown and skirt mating surfaces to either side of the cooling gallery, the bonding steps including: 1) bonding the crown and skirt together through the first path which is defined by the inner crown mating surface and the inner skirt mating surface to form a first bond to the one side of the cooling gallery, which allows the second conductive path which is defined by the outer crown mating surface and the outer skirt mating surface to form to the another side of the cooling gallery, causing the conductive path to form on both sides of the cooling gallery; or 2) bonding the crown and skirt together through the second path which is defined by the outer crown mating surface and the outer skirt mating surface to form a second bond to the another side of the cooling gallery, which allows the first conductive path which is defined by the inner crown mating surface and the inner skirt mating surface to form to the one side of the cooling gallery, causing the conductive path to form on both sides of the cooling gallery.