US 2007/0181643 A1 · METHOD AND SYSTEM FOR WELD BEAD SEQUENCING TO REDUCE DISTORTION AND STRESS

Abstract

In one embodiment, the present invention relates to a method and system of determining the weld bead sequence on a mechanical component is disclosed. In one specific embodiment, the sequence is determined by numerical analysis of a plurality of weld bead sequences to determine the weld bead sequence. Then, after this sequence is determined, a weld overlay is placed onto the mechanical component using the sequence. In particular embodiments, a weld bead sequence is applied to a boiler tube panel wherein the sequence begins at the crown of the tube, progresses down the walls of the tube to the tube and membrane interface, and concludes on the membrane. The new bead sequence reduces residual and distortional stresses as created by applying a weld overlay.

Claims11

Dependent claims

A method of applying a weld overlay to a boiler tube panel, comprising:

applying a first weld bead at the crown of a wall of a boiler tube at a first location;
applying a second weld bead at the crown of the wall of the boiler tube at a second location parallel to the first location on the opposite side of the tube center line axis;
applying a third weld bead at the cap of the boiler tube,
applying a plurality of weld beads beginning with applying an additional weld bead next to the first location, alternating parallel to the tube center line axis to apply another weld bead, and continuing to alternate and place additional weld beads when moving down the tube wall to a membrane and tube wall interface;
and
applying subsequent weld beads on the membrane.

3 more elements

Dependencies are inferred from the claim text.

Method and system for weld bead sequencing to reduce distortion and stress

Life of this patent

Method and system for weld bead sequencing to reduce distortion and stress

Life of this patent

Abstract

Claims11