A hemispherical core die for hollow extruded shapes of 6063 aluminum alloy.
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概要
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In the present work, a die which is named hemispherical core die, has been developed for hollow extruded shapes of 6063 aluminum alloy. The endface of the core of the die is hemispherical on entry side of a billet. The maximum tensile stress appearing around the root of a mandrel of the core is remarkably reduced in comparison with a porthole die, which results in suppresion of crack initiation. The hemispherical core die is designed and manufactured, based on calculation of stress distribution by FEM. FEM analysis showed that the core weight and the maximum tensile stress around the mandrel of the new type of die are respectively lowered to 12% and 26% those of the previous type of die. A hemispherical core, manufactured on the base of the FEM analysis is lightened to 13% and the extrusion pressure is lowered to 96% of the previous type of die.
- 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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