Frank E Palko

US Patent:

6339878, Jan 22, 2002

Filed:

Mar 27, 2000

Appl. No.:

09/536364

Inventors:

William D. Owen - Manchester CT
Robert Baumgarten - Palm Beach Gardens FL
Eric William Malmborg - Marlborough CT
Christopher Palazzini - Windsor CT
Frank E. Palko - Old Saybrook CT

Assignee:

United Technologies Corporation - Hartford CT

International Classification:

B23P 1500

US Classification:

298891, 298897

Abstract:

A method for repairing an airfoil is provided that includes the steps of: (a) determining repair regions of the airfoil that are likely to be damaged during a period of operation; (b) creating a stress profile for the airfoil that considers dynamic, steady-state, and residual stresses; (c) selecting a replacement section patch line using the stress profile and the determination of those regions likely to be damaged during operation; (d) providing an airfoil replacement section with a predetermined shape having a bond surface that substantially mates with the patch line; (e) removing a portion of the airfoil up to the patch line; (f) bonding the airfoil replacement section to the airfoil along the patch line; and (g) shaping the patched airfoil.