塑性と加工
Online ISSN : 1882-0166
Print ISSN : 0038-1586
ISSN-L : 0038-1586
論文
冷間後方カップ押出し鍛造におけるねじり振動付加による押出し部の表面性状および形状の変化
―ねじりモーション付加鍛造加工法の開発 第2報―
松本 良髙塚 誠司宇都宮 裕
著者情報
ジャーナル 認証あり

2019 年 60 巻 703 号 p. 241-246

詳細
抄録

The surface quality and shape of an extruded part of a workpiece were 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 a maximum axial speed of 0.1 mm/s, an alternating amplitude of 5°, and a maximum angular speed of 0.5 rpm at room temperature. The deformation behavior of the workpiece at the inner surface of the container was investigated by experiment and finite element simulation. The sidewall of the workpiece was axially extruded and circumferentially rotated with approximately 25% lower contacting pressure with the container, so that an extruded workpiece with a uniform and smooth sidewall surface was obtained. 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. The influence of the non-uniform friction at the container-workpiece contact on the sidewall height of the extruded workpiece was discussed using the results of finite element simulation.

著者関連情報
© 2019 一般社団法人 日本塑性加工学会
前の記事
feedback
Top