二段階超塑性成形による７４７５アルミニウム合金の板厚を均一化した半球ドームの加工
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概要
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A new superplastic forming method for 7475 aluminum alloy sheets into a hemispherical dome, having uniform thickness, has been developed. The method consists of the preliminary forming into a truncated cone, and the final forming into a hemispherical dome from its bottom. The final thickness distribution of the hemispherical dome was determined by the thickness distribution of the bottom controlled by friction with die. The optimal configuration of the truncated cone was determined by a numerical calculation method. Finally 7475 aluminum alloy sheet was processed into a hemispherical dome by the two stage superplastic forming. The thickness distribution in both of the preliminary truncated cone and the final hemispherical dome were expected ones.
- 一般社団法人 軽金属学会の論文
一般社団法人 軽金属学会 | 論文
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