Coupling Bolt RepairBack to
||Edison Sault Electric Company|
||Utility Power Generation|
These coupling bolts used to join the turbine and generator together would receive extreme abrasive wear from the secondary leather coupling. The past repair method was to remanufacture new coupling bolts when required.
Coupling bolts were grooved on a lathe to a depth of 30 mils. Grooving improves mechanical bonding properties of Titanium Putty. Repair area was then chemically cleaned using Cleaner Blend 300. As the coupling bolts rotated slowly on the lathe, Titanium Putty was applied to a thickness 65 mils over the desired dimension. A heat lamp was positioned over the repaired area and the coupling bolt was rotated continually for 1 hour. Rotating eliminates the risk of Titanium Putty sagging. Following a 1 hour cure, Titanium Putty was machined to original coupling bolt specification using carbide tooling.