Evaluation of Surface Roughness of Additively Manufactured Overhead Bin Latch Housings
by HAVADER Editör Ekibi
Pick up a 3D-printed object and you'll often feel a slight roughness on its surface — a natural result of being built layer by layer. At home, that's a detail you can overlook, but on a component passengers touch every day inside an aircraft cabin, like an overhead bin latch, that roughness matters for both aesthetics and perceived quality.
Cabin interior components make up roughly a tenth of an aircraft's total weight, and most of them sit in plain view of passengers. This study set out to determine whether additively manufactured (3D-printed) overhead bin latch housings can match the original factory part in visual and tactile quality.
The researchers applied various surface treatments to latch housings produced by two 3D-printing methods — Fused Deposition Modeling (FDM) and Selective Laser Sintering (SLS) — then measured the results with mechanical and optical profilometers. These instruments map micron-level surface irregularities, turning invisible differences into hard numbers.
The results showed clear differences depending on the combination of manufacturing method and finishing process: some combinations produced surface quality nearly matching the original part, while others remained noticeably rougher. The study's contribution is a concrete selection guide for aviation manufacturers: which production-plus-finishing combination is good enough for a part at a given visibility level.
The everyday parallel is exactly what a furniture maker does when testing different grades of sandpaper to get a tabletop to the smoothness a customer expects — except here the "customer" is the aviation regulator and the passenger flying at hundreds of kilometers per hour. In the end, this study opens the door to 3D printing being used with confidence not just for prototypes, but for visible cabin parts passengers actually touch — as long as the right manufacturing and finishing combination is chosen.
Cabin interior components make up roughly a tenth of an aircraft's total weight, and most of them sit in plain view of passengers. This study set out to determine whether additively manufactured (3D-printed) overhead bin latch housings can match the original factory part in visual and tactile quality.
The researchers applied various surface treatments to latch housings produced by two 3D-printing methods — Fused Deposition Modeling (FDM) and Selective Laser Sintering (SLS) — then measured the results with mechanical and optical profilometers. These instruments map micron-level surface irregularities, turning invisible differences into hard numbers.
The results showed clear differences depending on the combination of manufacturing method and finishing process: some combinations produced surface quality nearly matching the original part, while others remained noticeably rougher. The study's contribution is a concrete selection guide for aviation manufacturers: which production-plus-finishing combination is good enough for a part at a given visibility level.
The everyday parallel is exactly what a furniture maker does when testing different grades of sandpaper to get a tabletop to the smoothness a customer expects — except here the "customer" is the aviation regulator and the passenger flying at hundreds of kilometers per hour. In the end, this study opens the door to 3D printing being used with confidence not just for prototypes, but for visible cabin parts passengers actually touch — as long as the right manufacturing and finishing combination is chosen.