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

Naufal Achmad Salman Alfarisi; Gil Nonato C Santos; Rachmadi Norcahyo; Jayan Sentanuhady; Nikmatul Azizah; Muhammad Akhsin Muflikhun

doi:10.1016/j.heliyon.2021.e08432

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

Heliyon. 2021 Nov 20;7(12):e08432. doi: 10.1016/j.heliyon.2021.e08432. eCollection 2021 Dec.

Authors

Naufal Achmad Salman Alfarisi¹, Gil Nonato C Santos², Rachmadi Norcahyo¹, Jayan Sentanuhady¹, Nikmatul Azizah³, Muhammad Akhsin Muflikhun¹

Affiliations

¹ Mechanical and Industrial Engineering Department, Gadjah Mada University, Indonesia.
² Physics Department, De La Salle University, Manila, Philippines.
³ Ghent University, Ghent, Belgium.

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.

Keywords: 3D printing; Angle effect; Music box; Remodeling; Sound quality.