The Influence of Infill Patterns on Tooth Root Rigidity by Additive Gear Manufacturing

Gál, Károly István and Gergely, Attila Levente and Máté, Márton (2025) The Influence of Infill Patterns on Tooth Root Rigidity by Additive Gear Manufacturing. ACTA MATERIALIA TRANSYLVANICA (EN), 8 (2). pp. 60-65. ISSN 2601-8799

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Abstract

In this study, we present an analysis of the infill patterns of 3D-printed gears with the aim of optimizing their load- capacity. During the investigation, we developed custom infill patterns, taking into account the influ ence of the direction of forces which occur under service. These patterns were compared with the Gyroid infill, which is the most commonly recommended in the literature. The examined gears were cylindrical involute gears, and the mass of the part was used as a reference parameter during the printing process. A unique infill pattern was designed and combined with the Gyroid infill, then compared to the conventional Gyroid infill structure. The load-bearing capacity of different infill structures was determined by applying a simple static load test. Three gears were printed for each infill pattern, and three individual static load-bear ing tests were performed on each gear. Since plastic gears were used in this study, the central bore of the gears was modified. This modification was necessary because, if a simple keyway solution had been applied, the gears could have rotated on the shaft due to the applied torque. To prevent this, the central bore was replaced with a hexagonal design.

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