基于有限元法的三通管接头多向模锻成形仿真与优化

针对三通管接头在模锻成形中易出现破裂、材料折叠、冲头载荷大等问题,研究了冲头速度、坯料初始温度、摩擦系数对锻件模锻质量的影响。通过Deform软件,研究了水平冲头和垂直冲头等速进给、水平冲头和垂直冲头差速进给、水平冲头进给而垂直冲头不运动3种工艺条件下锻件的成形规律,并基于上述最佳工艺,研究了坯料初始温度对模锻过程中温度分布的影响,以及摩擦系数对锻件等效应变的影响,以获得最优的工艺参数。结果表明:在水平冲头和垂直冲头差速进给的情况下锻件质量较好,最优工艺参数能够显著降低冲头载荷,通过与试验结果对比,验证了有限元仿真结果的正确性,为类似管件模锻工艺的研究提供了理论参考。

Simulation and optimization on multi-directional die forging for tee pipe joint based on finite element method

For the problems such as fracture,material folding and heavy punch load in the die forging process of tee pipe joint,the influences of punch speed,initial temperature of billet and friction coefficient on the die forging quality of forgings were studied,and the forming laws of forgings under three technological conditions of feeding at the same speed for horizontal punch and vertical punch,feeding at different speeds for horizontal punch and vertical punch and feeding of horizontal punch and not moving of vertical punch were studied by software Deform. Based on the above-mentioned optimal process,the influence of initial temperature for billet on the temperature distribution in the die forging process and the influence of friction coefficient on the equivalent strain of forgings were studied to obtain the optimal process parameters. The results show that the forging quality is better under the condition of feeding at different speeds for horizontal punch and vertical punch,and the punch load reduces significantly under the optimal process parameters. By comparing with the test results,the correctness of the finite element simulation results is verified,which provides a theoretical reference for the research of die forging process for similar pipes.