Model optimization and performance evaluation of hand cranked music box base structure manufactured via 3D printing

Abstract

A sound produced from the music box could mesmerize music lovers. The complex mechanism that combined manual with semi-automatics movement creates the music box as a challenge for the manufacturer to innovate and optimize. This study focused on redesigning a hand-cranked music box's base structure using 3D printing and comparing the sound produced with the original model. It is shown that 3D printing can create a complex model with minimum material waste and good repeatability. After remodeling the music box's in a 3D CAD model, the prototype was built, and the tune played by each model was recorded and compared. The results showed that four improvements were made in the barrel mounting, crankshaft holder, crankshaft locker, and comb locker from the built four models. The sound analysis shows that the quality of sound can be improved by using the system's spacer. Furthermore, the finite element method and exact experiment results show that the loudest and best sound quality can be achieved using a 60° angle slope for the music box base structure.

The Energy Absorption Behavior of 3D-Printed Polymeric Octet-Truss Lattice Structures of Varying Strut Length and Radius

“…Polymeric lattice structures are produced using a variety of AM technologies, with fused deposition modeling (FDM) [ 18 , 19 ] and stereolithography (SLA) [ 20 ] being the most common. FDM 3D printing is particularly attractive for hobbyist applications, such as sporting equipment and art projects, due to its ease of use, low cost of both equipment and filament, and reasonable resolution [ 21 , 22 ]. Due to higher resolution, excellent surface finish quality, isotropic mechanical properties, greater material variety and faster print times, SLA 3D printing is generally preferred, and will be the focus of the current work [ 3 , 23 , 24 ].…”

3D-Printed Fiber-Reinforced Polymer Composites by Fused Deposition Modelling (FDM): Fiber Length and Fiber Implementation Techniques

“…Next, most of the previous research focused on the fundamental aspect such as mechanical, thermal, or electrical properties of FDM 3D printed fiber reinforced polymer in the form of standard test specimens instead of the actual product, despite some works on actual products being reported [ 64 , 163 , 164 ]. Further research on the performance of actual fiber reinforced composite products fabricated via FDM 3D printing is necessary before FDM 3D printed fiber reinforced composite can be adopted widely in product design.…”

Surface roughness and dimension accuracy data from hybrid manufacturing process using PLA material

“…The manufacturing process of 3D printing presents inherent challenges such as higher surface roughness and low accuracy values, primarily attributable to the layer-by-layer construction method and material shrinkage up to around 0.5 mm [ 1 , 2 ]. This variability in surface characteristics and dimensional accuracy is influenced by factors such as layer thickness and printing angles, which necessitates careful consideration during the printing process [ 3 , 4 ].…”