鋳物
Online ISSN : 2186-0335
Print ISSN : 0021-4396
ISSN-L : 0021-4396
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63 巻, 12 号
選択された号の論文の9件中1～9を表示しています
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解説
研究論文
  • 一方向凝固 Pb-Sn 合金円板の鋳造変形
    大島 洋介, 新山 英輔
    1991 年 63 巻 12 号 p. 953-958
    発行日: 1991/12/25
    公開日: 2011/07/08
    DOIhttps://doi.org/10.11279/imono.63.12_953
    ジャーナル フリー
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      As a basic study of deformation behavior of castings, measurements were made on warping of the bottom of Pb-Sn alloy disks unidirectionally solidified on a chill plate. Despite the flat chill plate, the shape of the bottom after casting was parabolically convex towards downward. Deformation was large in pure Pb, pure Sn and eutectic Pb-Sn composition. Deformation was small and sometimes concave in other alloy compositions with solidification tempeature range. Cause of the deformation is an integrated thermoelastic deformation of the growing solid shell, due to decreasing temperature gradient in the solid during solidification, which is particularly pronounced in alloys with a single solidification temperature. This is considered to be one of the basic deformation behaviors of castings.
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  • 砂型鋳鉄鋳物に発生する残留応力の FEM 解析
    牧野 浩, 小野 高興, 大塚 幸男, 松原 永吉
    1991 年 63 巻 12 号 p. 959-964
    発行日: 1991/12/25
    公開日: 2011/07/08
    DOIhttps://doi.org/10.11279/imono.63.12_959
    ジャーナル フリー
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      To analyze residual stress of sand mold iron castings, a computer simulation method has been developed. The simulation has been done by using a commercial finite element code (ABAQUS ver. 4.8). Measured temperature distribution of a casting has been used as a load condition in the simulation. The simulation results, i. e. residual stress distribution under various conditions of casting's shape or cooling condition, have been nearly agreed with experimental results. Therefore, this simulation method seems useful for designing of castings.
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  • 消失模型鋳造法における模型の変形
    山本 康雄, 三宅 秀和, 岡田 明
    1991 年 63 巻 12 号 p. 965-970
    発行日: 1991/12/25
    公開日: 2011/07/08
    DOIhttps://doi.org/10.11279/imono.63.12_965
    ジャーナル フリー
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      Because the pattern made of polystyrene is liable to deform in the molding process and its deformation reflects greatly on the dimension of castings, its deformation is very important problem for the evaporative pattern casting process. The method to accurately measure the occurred deformation by the strain gauge is proposed. It is found with 2.5 inch gate valve pattern that the suitable washing on the pattern markedly decreases the deformation of the pattern and that the dimension of castings without casting practically can be assumed accurately by the pattern dimension on last molding process. Since the pattern is scarcely deformed by vibrating the mold under reduced pressure, it is indicated that the method to vibrate the melt during solidification can be applied to the evaporative pattern casting process under reduced pressure.
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