FEM analysis of friction for pressing dies controlled by shot treatment

K. Abe, H. Fukaura, Masatoshi Aramaki, Osamu Furukimi

    研究成果: Contribution to specialist publicationArticle

    抄録

    The finite element method (FEM) analysis of elastic-plastic deformation was applied to examine the effect of surface texture controlling of dies by means of hybrid-shot (double shot by two different kinds of particles) treatment on the galling property applied to high tensile strength steel sheets. The FEM analysis results showed that the apparent friction coefficient, which was calculated from pressing load and the drawing force, increased with each increase in the pressing load. The experimental results from the drawing tests with lubricant oil showed that the friction coefficient of the die after hybrid-shot treatment decreased slightly with the increase of the pressing load. On the other hand, the friction coefficient of the die without shot treatment, (i.e. nearly flat surface), slightly increased with the increase of the pressing load due to the digging effect. These findings reveal that the effect of surface texture of dies was caused not only by the elastic-plastic deformation but also by the oil lubrication condition. The FEM analysis was therefore performed by taking into account the digging effect as well as the micro-oil pool effect. The experimental result in the case of hybrid-shot dies corresponds well to the FEM result by adopting the virtual oil model where the oil segment was defined as an elastic solid body.

    本文言語英語
    ページ26-32
    ページ数7
    70
    No.1
    専門出版物HTM - Journal of Heat Treatment and Materials
    DOI
    出版ステータス出版済み - 1 1 2015

    All Science Journal Classification (ASJC) codes

    • 産業および生産工学
    • 金属および合金
    • 材料化学

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