Nueva formulación analítica para la especificación de torque de uniones atornilladas considerando roscas métricas externas cónicas y roscas internas paralelas
DOI:
https://doi.org/10.35819/remat2025v11id7620Palabras clave:
uniones atornilladas, roscas métricas cónicas y paralelas, longitud de filetes enganchados, determinación del torque de aprieteResumen
Especificar y aplicar el torque de apriete correcto para alcanzar la fuerza de tracción requerida es esencial para obtener una unión atornillada por fricción confiable. Para evitar la falla de cualquier componente y/o el auto-desatornillado, la longitud efectiva de los filetes enganchados es de suma importancia. Las formulaciones analíticas disponibles para estas aplicaciones contemplan la unión de roscas métricas paralelas, internas y externas. Sin embargo, no hay formulación analítica para rosca externa cónica con rosca interna paralela. Por lo tanto, el presente trabajo desarrolla un procedimiento analítico para determinar la longitud mínima de los filetes enganchados, el porcentaje de la máxima fuerza de montaje que soporta el primer filete enganchado y, así, determinar el torque de montaje de rosca externa métrica cónica con rosca interna paralela. Los resultados mostraron que, en este caso, solo un pequeño número de filetes se conecta efectivamente y el primer filete soporta la mayor parte de la fuerza de tracción requerida (aproximadamente 35%). Para ilustrar este procedimiento, se presenta un ejemplo resuelto al final del artículo.
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