Dependence of powder characteristics on die wall friction during ejection of compacts from die cavity

Taku Iwaoka, Yukiko Ozaki, Akira Fujiki

研究成果: ジャーナルへの寄稿記事

抄録

The evaluation of ejection behavior is important to the final formability of green compact because both the ejection and the compression in the powder die compaction are affected by die wall friction. In other words, there is a hysteretic relationship between the lateral pressure and compacting pressure. In this paper, the effect of powder characteristics on the ejection die wall friction was studied using a powder model that considers the hardness and shape of the powder. The ejection behavior was classified on the basis of the powder's characteristics coefficient drawn from the model. Next, the influence of the particle size distribution, in addition to that of the hardness and shape of the powder, on the ejection behavior was shown.

元の言語英語
ページ(範囲)73-79
ページ数7
ジャーナルFuntai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
64
発行部数2
DOI
出版物ステータス出版済み - 2 1 2017
外部発表Yes

Fingerprint

Powders
Friction
Compaction
Hardness
Formability
Particle size analysis

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering
  • Industrial and Manufacturing Engineering
  • Metals and Alloys
  • Materials Chemistry

これを引用

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AB - The evaluation of ejection behavior is important to the final formability of green compact because both the ejection and the compression in the powder die compaction are affected by die wall friction. In other words, there is a hysteretic relationship between the lateral pressure and compacting pressure. In this paper, the effect of powder characteristics on the ejection die wall friction was studied using a powder model that considers the hardness and shape of the powder. The ejection behavior was classified on the basis of the powder's characteristics coefficient drawn from the model. Next, the influence of the particle size distribution, in addition to that of the hardness and shape of the powder, on the ejection behavior was shown.

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