Inspection Of Curvic Couplings Using A CMM
Author(s)
N.B. Orchard
Abstract
The inspection of curvic coupling geometry is usually done by using a mating
master curvic to check the transfer of a very thm coating of engineering blue
from the master to the curvic being inspected. The mating master curvic is also
used to measure dimensions such as swash, radial runout and overall stacking
height. Although the method is relatively quick, it needs a skilled eye to
interpret the bluing patterns, and it does not produce any numerical data on the
curvic form. The development of new methods for rnachning curvic couplings
places a greater emphasis on having numerical data in order to provide
inspection feedback. Rolls-Royce has investigated the use of a coordinate
measuring machine (CMM) to inspect curvic couplings, and this paper discusses
some of the problems and successes.
1
Keywords
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