MAGNETIC ARC WELDED PISTON ASSEMBLY
First Claim
1. A method, comprising:
- providing a piston lower part defining a piston axis and at least a portion of an upper combustion bowl surface;
positioning a piston upper part in proximity to the piston lower part, wherein the piston upper and lower parts cooperate to define at least in part an annular cooling gallery extending about the piston;
bringing the piston upper and lower parts into contact along respective upper and lower mating surfaces; and
inducing an electric current between the upper and lower mating surfaces while the upper and lower mating surfaces are in contact.
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Accused Products
Abstract
Exemplary pistons and methods of making the same are disclosed. An exemplary method generally includes providing a piston lower part defining a piston axis and at least a portion of the upper combustion bowl surface, and assembling a piston upper part to the piston lower part. The piston upper and lower parts cooperate to define at least in part an annular cooling gallery extending about the piston. The method may further include bringing the piston upper and lower parts together along respective upper and lower mating surfaces and inducing an electric current between the upper and lower mating surfaces while the upper and lower mating surfaces are in contact.
7 Citations
20 Claims
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1. A method, comprising:
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providing a piston lower part defining a piston axis and at least a portion of an upper combustion bowl surface; positioning a piston upper part in proximity to the piston lower part, wherein the piston upper and lower parts cooperate to define at least in part an annular cooling gallery extending about the piston; bringing the piston upper and lower parts into contact along respective upper and lower mating surfaces; and inducing an electric current between the upper and lower mating surfaces while the upper and lower mating surfaces are in contact. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 19, 20)
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13. A method, comprising:
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providing a piston lower part defining a piston axis and at least a portion of an upper combustion bowl surface; assembling a piston upper part to the piston lower part, wherein the piston upper and lower parts cooperate to define at least in part an annular cooling gallery extending about the piston; bringing the piston upper and lower parts together along respective upper and lower mating surfaces; inducing an electric current between the upper and lower mating surfaces while the upper and lower mating surfaces are in contact; spacing the upper and lower mating surfaces apart after the electric current is induced between the upper and lower mating surfaces, thereby forming an electric arc across the upper and lower mating surfaces; and contacting the upper and lower mating surfaces together after the electric arc is formed across the upper and lower mating surfaces. - View Dependent Claims (14, 15, 16, 17, 18)
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Specification