Publicación: Desarrollo de impresión 3D láser de lecho de polvos en coordenadas polares y su comparación con impresión 3D láser convencional cartesiana: caracterización mecánica de argollas impresas en acero 316L
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2022
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info:eu-repo/semantics/openAccess
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['Universidad Nacional de Educación a Distancia (España)', 'Universidad Politécnica de Madrid. Departamento de Ingeniería Mecánica']
Resumen
La impresión 3D láser de lecho de polvos realizada usando coordenadas polares, llamada Spiral Growth Manufacturing (SGM), permite fabricar piezas de revolución axi-simétricas en menor tiempo en comparación con la impresión láser convencional cartesiana o Selective Laser Melting (SLM). El estudio consideró la fabricación por impresión 3D láser tanto polar (SGM) como cartesiana (SLM), de argollas a partir de polvo de acero AISI 316L. Estas fueron comparadas dimensional, mecánica y térmicamente. Las argollas tienen un diámetro nominal exterior de hasta 75 mm e interior de 45 mm. Resultados indican que la precisión dimensional geométrica, la densidad específica y nominal de las argollas polares es muy cercana a las obtenidas mediante el proceso cartesiano, pero que la resistencia máxima es menor producto de una baja adhesión de la capa continua espiral. La eficiencia de construcción de las argollas impresas polarmente es en promedio 5% mayor que la de las argollas cartesianas.
Powder bed laser 3D printing performed using polar coordinates, called Spiral Growth Manufacturing (SGM), allows manufacturing axi-symmetric revolution parts in less time compared to conventional cartesian laser printing or Selective Laser Melting (SLM). In the present work, a device to perform SGM operating under polar coordinates is presented. The study considered the manufacture by 3D laser printing, both polar (SGM) and cartesian (SLM), of rings from AISI 316L steel powder. These were compared dimensionally, mechanically and thermally. The rings have a nominal outer diameter of up to 75 mm and inner one of 45 mm. Results indicate that geometric dimensional precision, specific and nominal density of the polar rings is very close to those obtained through cartesian process, but the maximum strength is lower due to less adhesion of the continuous spiral layer. Construction efficiency of rings by polar printing is on average 5% higher than for cartesian obtained rings.
Powder bed laser 3D printing performed using polar coordinates, called Spiral Growth Manufacturing (SGM), allows manufacturing axi-symmetric revolution parts in less time compared to conventional cartesian laser printing or Selective Laser Melting (SLM). In the present work, a device to perform SGM operating under polar coordinates is presented. The study considered the manufacture by 3D laser printing, both polar (SGM) and cartesian (SLM), of rings from AISI 316L steel powder. These were compared dimensionally, mechanically and thermally. The rings have a nominal outer diameter of up to 75 mm and inner one of 45 mm. Results indicate that geometric dimensional precision, specific and nominal density of the polar rings is very close to those obtained through cartesian process, but the maximum strength is lower due to less adhesion of the continuous spiral layer. Construction efficiency of rings by polar printing is on average 5% higher than for cartesian obtained rings.
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Categorías UNESCO
Palabras clave
coordenadas polares,, selective laser melting, fundición láser de lecho de polvos, acero AISI 316L, propiedades mecánicas
Citación
Centro
E.T.S. de Ingenieros Industriales
Departamento
Mecánica