会議発表論文

会議発表論文

text

Minerals, Metals and Materials Series. 2021, p. 217-225

Surface Quality of Extruded Sidewall in Cold Backward Cup Extrusion with Low-Frequency Torsional Oscillation

Springer Science and Business Media Deutschland GmbH

英語

text

2021-07-11

https://doi.org/10.1007/978-3-030-75381-8_18

This version of the article has been accepted for publication, after peer review (when applicable) and is subject to Springer Nature’s AM terms of use, but is not the Version of Record and does not reflect post-acceptance improvements, or any corrections. The Version of Record is available online at: https://doi.org/10.1007/978-3-030-75381-8_18

The effect of torsional oscillation on the surface quality of an extruded sidewall of a workpiece was investigated in backward cup extrusion with an extrusion ratio of 2.0 at room temperature. In this extrusion process, a cylindrical aluminum workpiece lubricated with mineral oil was extruded in the axial direction and simultaneously twisted in the circumferential direction between extrusion and knockout punches. The two punches were controlled with an axial speed of 0.1 mm/s, an alternating amplitude of 5°, and a maximum angular speed of 0.5 rpm. The torsional oscillation tilted the traction direction at the container–workpiece from the radial direction to the circumferential direction with approximately 25% lower contact pressure on the container. As the result, the surface of the extruded sidewall was uniformly smoothed.

94003

Surface Quality of Extruded Sidewall in Cold Backward Cup Extrusion with Low-Frequency Torsional Oscillation

Springer Science and Business Media Deutschland GmbH

英語

2021-07-11

Minerals, Metals and Materials Series

217

225

https://doi.org/10.1007/978-3-030-75381-8_18

https://hdl.handle.net/11094/94003