| 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 |
Surface Quality of Extruded Sidewall in Cold Backward Cup Extrusion with Low-frequency Torsional Oscillation |
| Author(s) |
Ryo Matsumoto, Seiji Takatsuka, Hiroshi Utsunomiya |
| On-Site Speaker (Planned) |
Ryo Matsumoto |
| Abstract Scope |
The surface quality of an extruded sidewall of a workpiece was investigated in cold backward cup extrusion with torsional oscillation. In this extrusion process, a cylindrical aluminum workpiece lubricated with a mineral oil was simultaneously extruded in the axial direction and twisted in the circumferential direction between extrusion and knockout punches with an axial speed of 0.1 mm/s, an alternating amplitude of 5deg, and a maximum angular speed of 0.5 rpm at room temperature. The sidewall of the workpiece was axially extruded and circumferentially rotated with approximately 25% lower contacting pressure with the container, so that the surface of the sidewall was uniformly smoothed. Furthermore, the circumferential profile of the sidewall height of the extruded workpiece was close to uniform because the workpiece was uniformly lubricated by the circumferential rotation of the workpiece. |
| Proceedings Inclusion? |
Definite: At-meeting proceedings |