押出し速度が一定の衝撃押出しの研究

DOI Web Site Web Site

書誌事項

タイトル別名
  • A Study of Impact Extrusion at Constant Speeds
  • オシダシ ソクド ガ イッテイ ノ ショウゲキ オシダシ ノ ケンキュウ

この論文をさがす

抄録

An experimental apparatus which enables us to perform impact extrusion a constant ram speeds has been constructed and successfully applied for the study of extrusion of high-purity aluminium. In this apparatus, extrusion is performed by means of impact of a long steel bar thrown at high speeds (the possible maximum speed: 50 m/sec). The duration of extrusion process is about 0.8 millisecond. Experiments have been carried out at room temperature with ram speeds ranging from 0.5 to 12 m/sec and extrusion ratios from 4.4 to 25. The results obtained are as follows: (1) The extrusion resistance (Q) increases with increasing extrusion speed (v) at a constant extrusion ratio, and the relation between them is expressed by the following formula, Q=kvn, where, for each different extrusion ratio, n seems to give a slightly different value, which is approximately 0.05. (2) The experimental relation between the extrusion resistance (Q) and the extrusion ratio (γ) is roughly expressed as Q(kg⁄mm2)=(15+21 ln γ)v0.05 (m/sec), including the extrusion speed (v). (3) The thickness of the deformation zone in residual billets is determined by hardness measurement and metallographical observation and is shown to be constant in the range of this experiment.

収録刊行物

  • 日本金属学会誌

    日本金属学会誌 27 (10), 461-466, 1963

    公益社団法人 日本金属学会

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ