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小斷面收縮率楔橫軋件的變形規律

Deformation rule of light area reduction shafts by cross wedge rolling

  • 摘要: 對楔橫軋軸類零件的成形過程進行有限元數值模擬與軋制實驗.從斷面收縮率角度研究了軋件的金屬變形特點,發現小斷面收縮率與常規斷面收縮率的分界點在35%左右.對比分析了小斷面收縮率與常規斷面收縮率軋件的金屬變形規律.結果顯示:小斷面收縮率軋件的主要變形發生在軋件外層附近,而常規斷面收縮率軋件的主要變形是在軋件內部;小斷面收縮率軋件比常規斷面收縮率軋件存在更大的軸向拉伸不均勻變形,易導致軋件在橫截面上呈現出橢圓化.

     

    Abstract: The forming process of shafts by cross wedge rolling (CWR) was presented by numerical simulation and rolling experiment. The metal deformation characteristics of roiled pieces were studied from the view of area reduction. It is found that the cut-off point between rolled pieces with light area reduction and conventional area reduction is roughly at 35%. Comparative analysis was mainly focused on the deformation rule of rolled pieces with light area reduction and conventional area reduction. The results show that the main deformation of roiled pieces with light area reduction is near the outer while that with conventional area reduction is inside. A more uneven axial tensile deformation exists in rolled pieces with light area reduction than in rolled pieces with conventional area reduction, leading to a heavier cross section elliptical deformation in rolled pieces with light area reduction.

     

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