Method of repairing a rod guide assembly of a fuel control unit
AssigneePratt & Whitney Canada Corp.
InventorsSamuel PANERO, Samuel MARCIL LABELLE, Eric D'AMOUR
Life of this patent
Estimating the term…
Abstract
A method of repairing a rod guide assembly of a fuel control unit of an aircraft engine is provided. The method comprises disconnecting a used spring seat from the rod of the rod guide assembly and welding a replacement spring seat to the rod using an electron beam controlled using a circular beam deflection pattern.
Claims20
A method of repairing a rod guide assembly of a fuel control unit of an aircraft engine where a used spring seat has been disconnected from the rod of the rod guide assembly, the method comprising:
- welding a replacement spring seat to the rod by:
- with the rod disposed on a first side of a wall of the replacement spring seat, directing an electron beam toward the wall of the replacement spring seat from a second side of the wall opposite the first side;
- and
- controlling the electron beam using a circular beam deflection pattern.
A method of repairing a rod guide assembly of a fuel control unit of an aircraft engine, the method comprising:
- disconnecting a used spring seat from the rod of the rod guide assembly;
- and
- welding a replacement spring seat to the rod using an electron beam controlled using a circular beam deflection pattern.
A fixture for holding a rod guide assembly of a fuel control unit of an aircraft engine during welding, the fixture comprising:
- a base;
- a first clamp counterpart movably coupled to the base, a position of the first clamp counterpart being adjustable along a clamping direction;
- a second clamp counterpart coupled to the base and spaced apart from the first clamp counterpart along the clamping direction;
- and
- a rod seat coupled to the base and disposed between the first clamp counterpart and the second clamp counterpart, the rod seat being configured to engage with the rod of the rod guide assembly and keep a longitudinal axis of the rod in substantial alignment with the clamping direction.
Dependencies are inferred from the claim text.