Abstract
Among bulkhead components (the structure that maintains the rigidity of an aircraft body), the chord (which supports the shear load between the surrounding structure and the web) and the side fitting (which connects and vertically reinforces the body and web) are titanium alloy parts with a high aspect ratio. These parts occupy the critical load path position of the aircraft and are required for large one-piece construction. This study verifies the milling process and deformation of the chord and side fitting. First, the milling characteristics of the Ti-6Al-4V alloy were simulated and the simulated cutting resistance was verified via comparison with experimental result. Next, the effects of the milling conditions on Ti-6Al-4V cutting resistance and cutting temperature were determined in a Taguchi analysis of the signal-to-noise ratio and variance. Finally, the deformation degrees of the BL0 chord and side fitting were determined using the simulated cutting resistance and cutting temperature.
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