对双金属管锥形模旋转挤压过程进行分析和数值模拟。建立了运动许可速度场，并用来评估内能以及在摩擦和速度断面上的损耗功。通过平衡旋转模容器与芯棒滚动摩擦而产生的力矩来确定容器中材料的捻线长度。通过引入所需的外能来平衡总功，并优化模具与外部材料之间的有关滑移参数，得到挤压力。结果表明，采用锥模旋转挤压可使挤压力减少20%。采用ABAQUS有限元程序模拟双金属管的旋转挤压过程。模拟结果与分析结果表现出很好的一致性。%Bimetal tube extrusion process through rotating conical dies was studied analytically and numerically. A kinematically admissible velocity field was developed to evaluate the internal power and the power dissipated on frictional and velocity discontinuity surfaces. By balancing the moment applied by the rotary die with the moments caused by the circumferential frictions in the container and on the mandrel, the twisting length of the material in the container was determined. By equating the total power with the required external power, the extrusion pressure was determined by optimizing with respect to the slippage parameter between the die and the outer material. It is shown that the extrusion pressure is decreased by about 20%by the die rotation. The bimetal tube extrusion process through rotating die was also simulated using the finite element code, ABAQUS. Analytical results were compared with the results given by the finite element method. These comparisons show a good agreement.
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