Aircraft Duct Additive Manufacturing for Complex Bends

The patent applies parameter changes by transitioning from traditional subtractive and formative manufacturing methods to additive manufacturing. This fundamental parameter change in the manufacturing process enables the creation of complex duct shapes, bends, and varying cross-sections without requiring complex tools or post-processing operations. The additive process directly deposits material in the desired final shape, eliminating the need for bending tools, heat treatment equipment, and multiple assembly steps.

The patent replaces traditional mechanical bending and forming systems with an additive manufacturing system. Instead of using mechanical force to bend cold tubes and then heat treating them, the invention uses a deposition process that builds the duct shape layer by layer or continuously along a helical path. This substitution eliminates the mechanical complexity of bending equipment while enabling greater shape versatility.

The patent merges multiple traditional manufacturing steps into a single additive manufacturing process. The formation of bends, creation of varying cross-sections, and material deposition are all accomplished in one continuous or near-continuous operation. The nozzle moves in a helical path that directly creates the final duct geometry including bends, eliminating the need for separate bending and heat treatment equipment and operations.

The patent extracts the bending operation from the manufacturing process entirely. Instead of creating a straight tube and then bending it, the additive process directly deposits material in the final bent configuration. This extraction of the bending step eliminates the associated equipment requirements and time consumption while maintaining the structural integrity through controlled material deposition and layer bonding.

The patent applies local quality by varying the material deposition characteristics at different locations along the duct. The system can adjust deposition rate, layer thickness, and material properties locally to optimize the duct structure. This enables lighter wall thicknesses in non-critical areas while maintaining sufficient strength where needed, and allows for optimized routing that reduces overall duct weight and space occupation compared to standard uniform-thickness ducts.

The patent introduces dynamics into the manufacturing process through the helical motion of the nozzle and the ability to vary deposition parameters in real-time. The nozzle moves in a controlled helical path while adjusting material deposition rates and patterns dynamically. This dynamic control enables precise material placement that optimizes structural integrity while minimizing material usage, resulting in lighter ducts with complex shapes that would be impossible with static traditional methods.