USF VACU-BLAT International, part of the USF Surface reparation Group, has developed a self-contained, 'universal', shot-peening machine, capable of processing an extensive range of fan blades, discs, and shafts from most aeroengines in current service in both the civil and defence aviation sectors. The machine improves he fatigue resistance of these critical parts, in line with aeroengine manufacturers' specifications, and can be used for both production and repair and overhaul applications. Shot peening is a technique employed extensively throughout the aviation and automotive industries to enhance the fatigue life of components under cyclic stress. The new peener incorporates a sophisticated process control system and has been designed primarily to process defined areas of aeroengine turbine blade roots and their associated turbine disc blade slots, which are subject to both wear and fretting fatigue during service. The machine can accept blades of up to 1m long and 250mm wide, and discs of up to 1.1m diameter and 350mm wide, and can also be used to peen other components measuring up to 1.1m in diameter and 600mm width.
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