(大连理工大学 材料科学与工程学院，大连 116023)
摘 要: 利用非线性有限元软件MSC.Marc建立转子屏蔽套真空热胀形过程的二维轴对称热力耦合有限元模型，计算并分析真空热胀形过程中转子屏蔽套和模具的径向位移变化，预测转子屏蔽套的胀形量和胀形后内径。此外，基于建立的有限元模型研究胀形间隙对转子屏蔽套胀形量和胀形后内径的影响。结果表明：对于确定的工艺，在其胀形能力范围内，随着胀形间隙的增大，转子屏蔽套的胀形量线性减小，且胀形后的内径不随胀形间隙的变化而变化。开展转子屏蔽套的真空热胀形实验，验证建立的有限元模型。
关键字: Hastelloy C-276合金；转子屏蔽套；真空热胀形；胀形间隙
（School of Materials Science and Engineering, Dalian University of Technology, Dalian 116023, China）
Abstract:A 2-D axis-symmetrical thermo-mechanical coupled finite element model of vacuum hot bulge forming process of rotor can was established using non-linear finite element software MSC.Marc. The radius-direction displacement variation of rotor can and die were calculated and analyzed. The bulging dimension and internal diameter of rotor can after bulging forming were predicted. In addition, the effects of bulging clearance on the bulging dimension and internal diameter of rotor can after bulging forming were discussed on the basis of developed finite element model. The results indicate that, when the bulging clearance increases, the bulging dimension of rotor can decreases linearly and the internal diameter of rotor can after bulging forming never changes. The corresponding vacuum hot bulge forming experiments were conducted to verify the reliability of the finite element model.
Key words: Hastelloy C-276; rotor can; vacuum hot bulge forming; bulging clearance
