长芯棒连轧管变形区金属的三维塑性流动
THREE-DIMENSIONAL PLASTIC FLOW OF METAL IN DEFORMATION ZONE DURING LONG-MANDREL CONTINUOUS TUBE-ROLLING
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摘要: 采用条元法,以长芯棒连轧管轧制变形区的出口环向位移作为待定参数,根据能量最小原理,求出出口环向位移的最优解,进而确定变形区塑性流动速度场。条元法具有计算准确、费用低、输入数据简单等特点,为长芯棒连轧管塑性理论分析提供了一种新的、有效的计算方法。Abstract: Taking the circumferential displacement at outlet of deformation in long-mandrel continuous tube-rolling as a parameter to be determined, the author derived the optimum solution of the displacement according to the minimum energy principle by applying the strip-element method and then further determined the plastic flow speed field of the deformation zone. The strip-element method, due to such features as accurate calculation, low cost and simplified data-input, surely becomes a new efficient calculation method for theoretical plastic analysis in long-mandrel continuous tube-rolling.
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