| About this Abstract |
| Meeting |
13th International Conference on the Technology of Plasticity (ICTP 2021)
|
| Symposium
|
13th International Conference on the Technology of Plasticity (ICTP 2021)
|
| Presentation Title |
Reducing Aluminum Extrusion Transverse Weld Process Scrap |
| Author(s) |
Gregory Oberhausen, Anselm Adrian Anak Christopher, Daniel Ross Cooper |
| On-Site Speaker (Planned) |
Gregory Oberhausen |
| Abstract Scope |
Nearly 20% of the aluminum produced globally is extruded. Up to one-quarter of this aluminum is scrapped in the form of extrusion butts and segments of extruded profiles that contain weak solid-state “transverse” welds that are created between consecutively extruded billets in direct extrusion. In this article, extrusion of differently colored clay billets is used to conduct a parametric study on the effect of extrusion ratio, die angle, friction coefficient, profile shape, and dummy block profile on the transverse weld length. Shorter transverse weld lengths require smaller lengths of the extruded profile to be extracted and scrapped. The results show that the transverse weld length can be reduced by decreasing the extrusion ratio, die angle, or friction coefficient. The profile shape also has a strong influence; the transverse weld length was found to scale with the cross-sectional perimeter to area ratio of the extruded profile. Additionally, it is shown that the dummy block profile (a previously unexplored design variable) can be modified to decrease the weld length. A concave dummy block was designed using an estimated velocity field for axisymmetric extrusion of solid rods, decreasing the weld length by 44%. The industry implications of this work and the need for further research are discussed. |
| Proceedings Inclusion? |
Definite: At-meeting proceedings |