Monolite piston laser welding spatter control
First Claim
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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.
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Abstract
An exemplary system and method for welding a piston assembly includes a piston assembly having a cooling gallery and a loose granulated medium positioned therein. The cooling gallery is formed by a piston body and a cooling gallery ring, and a welder such as a laser welder is positioned proximate the assembly to weld the piston body to the cooling gallery ring. During welding, the assembly is rotated and the loose granulated medium is caused to remain in a gravitationally low portion of the cooling gallery. The weld is formed in an area proximate the loose granulated medium such that weld spatter emitted during welding is emitted into the loose granulated medium.
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Citations
14 Claims
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1. A method, comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method, comprising:
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assembling two components that include a cooling gallery ring with a piston body to form a piston assembly, such that a cavity of the piston body and cooling ring cooperate to form a cooling gallery; intentionally positioning a granular material within the cooling gallery after assembling the two components; positioning the piston assembly for laser welding the two components thereof, the cooling gallery circumferentially disposed about a perimeter thereof and formed by at least the two components; orienting the piston assembly such that the granular material positioned within the cooling gallery is displaced to a low gravitational portion of the cooling gallery; and laser welding the two components together at the low gravitational portion of the cooling gallery to form a weld joint between the two components, such that weld spatter emitted during laser welding passes to the granular material, wherein laser welding the two components together comprises directing a laser beam toward a pair of mating surfaces of the cooling gallery ring and the piston body. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification