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Monolite piston laser welding spatter control

  • US 9,440,310 B2
  • Filed: 01/15/2013
  • Issued: 09/13/2016
  • Est. Priority Date: 01/15/2013
  • Status: Expired due to Fees
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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