Electric heating – Inductive heating – Specific heating application
Reexamination Certificate
2006-04-25
2006-04-25
Robinson, Daniel (Department: 3742)
Electric heating
Inductive heating
Specific heating application
C219S639000
Reexamination Certificate
active
07034262
ABSTRACT:
Bucket tip tenons requiring refurbishment are removed from the bucket tips by grinding. Groups of buckets are clamped on a rotatable table in positions adjacent an induction heating coil and a robotic welding arm, respectively. While one group is preheated, the other group of buckets is in a welding location, enabling the welding head on the robotic arm to sequentially apply weld buildup material to the bucket tips. After applying weld buildup material in multiple passes and sequentially to the bucket tips, the buckets are removed, stress-relieved and the weld buildup material machined to provide refurbished tenons. Upon removal of the buckets from the table, the table is rotated to locate the preheated buckets in welding locations and additional buckets are clamped to the table for preheating.
REFERENCES:
patent: 4542272 (1985-09-01), Hubbard
patent: 5092942 (1992-03-01), Fraser et al.
patent: 5319179 (1994-06-01), Joecks et al.
patent: 6376801 (2002-04-01), Farrell et al.
patent: 2003/0066192 (2003-04-01), Wilkins et al.
Cook Carter Steven
Fischer Todd Joseph
Nolan John Francis
Parker David Roy
Roberts Dennis William
Nixon & Vanderhye P.C.
Robinson Daniel
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