Patent ID: 9440310
Filing Date: 2016-09-13
CPC Classification: B23K,F02F

Claim Text:
1. A method, comprising: providing a piston body having a piston axis, the piston body having a cavity forming a portion of a cooling gallery that is circumferentially disposed about the piston axis; providing a cooling gallery ring; assembling the cooling gallery ring with the piston body to form a pre-weld assembly, such that the cavity of the piston body and cooling gallery ring cooperate to form the cooling gallery and encompass a loose media; intentionally positioning the loose media within the cavity after assembling the pre-weld assembly; positioning the pre-weld assembly such that the loose media displaces to a gravitationally low portion of the cooling gallery; and laser welding the cooling gallery ring to the piston body at the gravitationally low portion of the cooling gallery to form a weld joint such that weld spatter emitted during laser welding is emitted into the loose media, wherein laser welding the cooling gallery ring to the piston body comprises directing a laser beam toward a pair of surfaces that include a surface of the cooling gallery ring and a surface of the piston body.