Influence of tool inclination on chip formation process and roughness response in ball-end milling of freeform surfaces on Ti-6Al-4V alloy
An experimental test part, which was made up of flat, concave, and convex surfaces of variable curvatures, was designed to be fabricated in a four-axis machining center. Aluminum alloy 7075 and titanium alloy Ti-6Al-4V were used for the fabrication. Within the finishing process, smeared/adhered ma...
| Autor Principal: | García-Barbosa, Jorge Andrés |
|---|---|
| Otros Autores: | Arroyo-Osorio, José Manuel, Córdoba-Nieto, Ernesto |
| Formato: | Generación de Nuevo Conocimiento: Artículos publicados en revistas especializadas - Electrónicos |
| Publicado: |
2019
|
| Materias: | |
| Acceso en línea: |
García-Barbosa, J. A., Arroyo-Osorio, J. M., & Córdoba-Nieto, E. (2017). Influence of tool inclination on chip formation process and roughness response in ball-end milling of freeform surfaces on ti-6Al-4V alloy. Bogotá: doi:10.1080/10910344.2016.1260434 |
| Etiquetas: |
Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
|
| Sumario: |
An experimental test part, which was made up of flat, concave, and convex surfaces of variable curvatures, was designed to be
fabricated in a four-axis machining center. Aluminum alloy 7075 and titanium alloy Ti-6Al-4V were used for the fabrication. Within
the finishing process, smeared/adhered material was found in some areas of the concave and convex surfaces of the titanium
alloy. On the other hand, smeared/adhered material was not found in the aluminum alloy. To characterize the type of defects,
the 3D roughness parameters of the surfaces were measured by confocal microscopy, and surface morphology was observed using optical microscopy and scanning electron microscopy. The kinematics of the ball-end milling process was modeled and it
was found that the lead and tilt angles between the tool axis and surface normal vector vary continuously, producing transitions between oblique-plunge-push-up milling and oblique-reversepush- up milling. This causes variation in the thickness behavior during the chip formation process. It was found that the lead angle has a moderate influence, while the tilt angle has a strong effect on the quality of the surfaces of the titanium alloy, with negative tilt angles producing the worst surfaces when there was the oblique-plunge-push-up milling process. |
|---|