선택적 레이저 소결 기술을 활용한 철도차량 제동밸브 바디 설계 연구

초록

This study evaluated a production plan to make the body of the main brake valve module of a railway vehicle made of aluminum alloy with a thermoplastic resin using 3D printing technology. In general, the main body of the brake valve module of a railway vehicle was manufactured using the machining process of an aluminum block. In the case of manufacturing the body structure by 3D printing technology using thermoplastic, a redesign process should be carried out considering the mechanical properties and the surface characteristics. In addition, when 3D printing is applied to manufacturing, the design freedom of the internal flow path shape of the body is expanded so that the pressure-based flow efficiency can be improved. In this study, each stage of design was established to consider a design plan to manufacture the module body with selective laser sintering technology, which is one of the representative 3D printing technologies. Configuration steps consisted of the material characteristics, surface roughness characteristics, and flow efficiency verification according to flow path curvature. Based on this, the redesign of the internal flow path curvature for fabrication was carried out. A performance test was conducted following the production of the main body by 3D printing.

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