(大連理工大學(xué) 材料科學(xué)與工程學(xué)院，大連 116023)
摘 要: 利用非線性有限元軟件MSC.Marc建立轉(zhuǎn)子屏蔽套真空熱脹形過程的二維軸對稱熱力耦合有限元模型，計算并分析真空熱脹形過程中轉(zhuǎn)子屏蔽套和模具的徑向位移變化，預(yù)測轉(zhuǎn)子屏蔽套的脹形量和脹形后內(nèi)徑。此外，基于建立的有限元模型研究脹形間隙對轉(zhuǎn)子屏蔽套脹形量和脹形后內(nèi)徑的影響。結(jié)果表明：對于確定的工藝，在其脹形能力范圍內(nèi)，隨著脹形間隙的增大，轉(zhuǎn)子屏蔽套的脹形量線性減小，且脹形后的內(nèi)徑不隨脹形間隙的變化而變化。開展轉(zhuǎn)子屏蔽套的真空熱脹形實(shí)驗(yàn)，驗(yàn)證建立的有限元模型。
關(guān)鍵字: Hastelloy C-276合金；轉(zhuǎn)子屏蔽套；真空熱脹形；脹形間隙
（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
