Business as usual at OR3D
The Defence School of Aeronautical Engineering (DSAE) based at RAF Cosford, approached OR3D to help with a particular engineering problem.
DSAE is the home for RAF Engineer Officer training and prides itself on being equipped with the latest training aids to support the learning of new Engineering Officers in the Royal Air Force.
As part of the Engineer Officer‘ s syllabus, they study the phenomenon of surge within an axial flow compressor. A specialist piece of equipment was designed and
manufactured in the 1950s, to help illustrate this aeronautical anomaly which can occur in jet engines under certain circumstances.
As part of the refurbishment of this equipment, a new compressor wheel was needed to be re-manufactured. Unfortunately the company who supplied the training aid was no longer trading and no drawings of the equipment existed.
ORSD used a laser arm to very accurately capture the geometry of the compressor vanes and hub.
The scan data was processed in Geomagic Design X to create a ‘Design Intent’ CAD model that to would be used to CNC a new compressor.
During the design of the CAD model from the scan data, there were a number at vanes that were Originally positioned incorrectly. It was only through the design process that these errors became apparent.
The image below shows the vane scan data (in blue) does not match the equally spaced positions ol the design intent CAD model (in grey).
The image below shows the inconsistencies of manufacture ol the original part when compared to the newly created CAD model.
Deviation set +/- 0.1 mm – (Green colour)
Combining the expertise of the OR3D to operate a high end laser arm scanner and Geomagic Design X soltware. Meant that the proiect had within two days ol modelling, created a higth accurate and optimised CAD model directly from scan data. With the design of the compressor now being re-created the Defence School of Aeronautical Engineering can continue to provide it’s students with a world class engineering education.
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As is: A model made to be very accurate to the scan data, including all it’s imperfections existing on the real component.
Design intent: A model that has been reverse engineered from scan data to what is believed to be the original design.
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