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在管材拉拔力的上限分析中，运用Avitzur连续速度场模式求解，确定了游动芯头拉拔时的速度场和拉拔力，并通过优化确定了最佳的模角和芯头锥角值，所得计算结果与实验结果比较接近，这为游动芯头拉拔工艺的合理制定提供了理论依据．
In the upper limit analysis of tube pullout force, the Avitzur continuous velocity field mode was used to solve the velocity field and pullout force of the moving core pulling, and the optimal die angle and corehead taper angle Value, the calculated results are close to the experimental results, which provides a theoretical basis for the reasonable formulation of swimming core drawing process.