Patent Number: 6,884,975

Title: Localized stress relief by induction heating

Abstract: A system and method inductively heats and stress relieves a weld joint area having a stress induced zone. A susceptor assembly is positioned over the stress induced zone. The susceptor assembly includes susceptor sheets manufactured to operate at different, preselected Curie temperatures. A housing is mounted over the susceptor assembly including an induction coil positioned adjacent to the susceptor assembly. An alternating electric current is applied to the induction coil. The alternating electric current causes the induction coil to generate a plurality of magnetic flux lines. The invention provides the advantage that the magnetic flux lines passing through the susceptor assembly heat the susceptor assembly providing localized and controlled temperature heat to the weld joint area to stress relieve the stress induced zone.

Inventors: Matsen; Marc R. (Seattle, WA), Smith; Terry L. (Renton, WA)

Assignee: The Boeing Company

International Classification: H05B 6/02 (20060101); H05B 006/40 ()

Expiration Date: 4/26/02017