RPI UK
Bath, UK
+44 (0) 1225 426206
www.rpiuk.com

RPI UK has installed two integrated rotor measurement and assembly platforms (iMAPs) at Atlanta-based Delta Airlines; the Rolls-Royce approved MRO facility. RPI specializes in developing and manufacturing precision positioning devices for high-accuracy rotary and angular inspection systems. The Atlanta-based Delta Airlines facility carry out maintenance, repair and overhaul (MRO) of all Rolls-Royce Trent engines in the United States.

Wyvern Industrial Technology LLC (RPI’s USA distributor) and Paris Mountain Consulting (RPI’s USA technical software support provider) were on hand to assist with the installation. Going forward, both companies will provide Delta with after-sales service.

In addition to the iMAPs, RPI has also supplied Delta with Trent series 03 and 04 module tooling sets significantly reducing set-up times and helping to improve the overall performance of the measurement process.

RPI’s iMAP is proven to reduce inspection times by 90% and improve gauge repeatability and reproducibility by up to 10 times. The technology is used by Delta after the engines are dismantled, to inspect each individual section of the engine for cracks, wear and distortion. Measurements are taken by AccuScan to check that the geometry of components meet their original and regional board specifications as part of the stringent MRO process. Once the components have been approved, repaired or replaced, the iMAP is used for engine assembly to ensure alignment and concentricity is correct and balanced as each section is rebuilt.

iMAP’s data acquisition software, AccuScan, enables measurement of up to 4,000 data points on up to eight surfaces simultaneously per revolution, thereby reducing process times to just two minutes; a significant time-saving compared with other available methods. This significantly improved inspection data is then used by the Rotor Stacking software to optimize the assembly of each component relative to its neighbor to achieve minimum runout or unbalance of the finished rotor. This technology is absolutely fundamental to ensure the operational quality of the engine entering back into service, for optimal reduction in vibration, greater fuel efficiency and longer service intervals.

Specifically designed to inspect large and heavy components, RPI’s iMAP machines are fully compatible with any shop floor environment while maintaining world class accuracies more commonly seen in the standards laboratory. Combining a motorized high precision air bearing rotary axis, rigid column unit, anti-vibration granite base and AccuScan multi-channel circular geometry inspection software, IMAP has a proven reputation system for productivity improvement in turbine rotor assembly.

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Aerospace & Defense Technology Magazine

This article first appeared in the June, 2020 issue of Aerospace & Defense Technology Magazine.

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