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Estudio del mecanismo de deslizamiento plasto-cizallante basado en la aleación de titanio TC4
Bo Hu1, Zichuan Zou2, Pengfei Tian3
1School of Mechanical Engineering, Guizhou Institute of Technology, Guiyang, China.
PloS one
|January 23, 2026
Resumen
Este estudio modela la zona de metal muerto y el punto de estancamiento en el corte de metales. El modelo de campo de líneas de deslizamiento desarrollado predice con precisión el deslizamiento plástico y mejora la comprensión de la mecánica de corte.
Área de la Ciencia:
- Ciencia de Materiales; Ingeniería Mecánica; Procesos de Fabricación
Sus antecedentes:
- El punto de estancamiento y la zona de metal muerto influyen significativamente en la formación de virutas y la distribución de tensiones en el mecanizado.; La investigación existente sobre las teorías de la zona de metal muerto y el punto de estancamiento es insuficiente.
Objetivo del estudio:
- Desarrollar un modelo de campo de líneas de deslizamiento que incorpore la zona de metal muerto y el punto de estancamiento.; Analizar la distribución de tensiones y presiones durante las diferentes etapas del proceso de corte.; Investigar la influencia de la geometría de la herramienta en la zona de metal muerto y el punto de estancamiento.
Principales métodos:
- Dividir el proceso de corte en etapas de contacto del borde redondeado y contacto del borde redondeado-cara de incidencia.; Construir un modelo de campo de líneas de deslizamiento basado en la distribución de tensiones y presiones.; Resolver el problema de Cauchy para calcular el campo de líneas de deslizamiento.; Utilizar SOLIDWORKS para visualización y verificación experimental.
Principales resultados:
- El modelo de zona de metal muerto muestra mayor precisión para ángulos de incidencia de herramienta de 15° o menos.; El ángulo de incidencia de la herramienta y el radio del borde redondeado de la punta son factores críticos que influyen en el punto de estancamiento.; El modelo de campo de líneas de deslizamiento con la zona de metal muerto proporciona una representación más precisa del deslizamiento plástico en el corte real.
Conclusiones:
- Los modelos desarrollados dilucidan el mecanismo de corte en las fases elástica y plástica.; Esta investigación proporciona una base para el estudio del desgaste de la herramienta, la formación de virutas y la calidad de la superficie de mecanizado.
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