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Fabricating an air inlet lip for aeronautical engine nacelle comprising two quarters, comprises embossing a sheet to impart circular arc profile, bending a plate to impart a circular arc profile, and friction stir welding the curved plate
Fabricating an air inlet lip for aeronautical engine nacelle comprising two quarters, comprises embossing a sheet to impart circular arc profile, bending a plate to impart a circular arc profile, and friction stir welding the curved plate
The process of fabricating an air inlet lip for aeronautical engine nacelle comprising two quarters, comprises embossing a sheet to impart a circular arc profile, bending a plate to impart a circular arc profile, friction stir welding the curved plate (6) along an end flange of embossed sheet (4) so as to form an outer wall of the inlet lip, and assembling the quarters to form the circular air inlet lip. The curved plate is welded edge to edge at the longitudinal edges (8, 10) of the embossed sheets using a double shoulder welding device (15), a support bar and a retractable pin. The process of fabricating an air inlet lip for aeronautical engine nacelle comprising two quarters, comprises embossing a sheet to impart a circular arc profile, bending a plate to impart a circular arc profile, friction stir welding the curved plate (6) along an end flange of embossed sheet (4) so as to form an outer wall of the inlet lip, and assembling the quarters to form the circular air inlet lip. The curved plate is welded edge to edge at the longitudinal edges (8, 10) of the embossed sheets using a double shoulder welding device (15), a support bar and a retractable pin. The shoulder is moved along an inner surface of the weld joint. The welding device is operated along two vertical axes with constant efforts. An outer side of the weld joint of the air inlet lip is leveled to suppress the joint streaks on outer side of corresponding shoulder of the welding device. The embossed sheet and curved plate have different composition.
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