Method of securing a tube in a bore through a spherical wall, and a device for depositing welding material in a facing
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United States of America Patent
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Apr 21, 2009
Issued Date -
N/A
app pub date -
Feb 3, 2005
filing date -
Feb 6, 2004
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An annular facing is machined in an inside surface of the spherical wall around the periphery of a zone where the wall has a bore for securing the tube passing therethrough. A first welding material is deposited in the facing, and the bore is made by drilling through a portion of the spherical wall that is surrounded by the facing. The tube is engaged tightly in the bore, and a second welding material is deposited in the facing at the periphery of the tube in order to weld the tube to the first welding material. At least one of the operations of depositing the first and second welding materials in the facing is performed automatically by causing a welding torch to turn around the axis of the bore while moving the torch in a direction that is parallel to the axis of the bore and while causing it to pivot about an axis that is orthogonal to the axis of the bore while rotation is taking place.
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