(1. 西北工業(yè)大學(xué) 凝固技術(shù)國(guó)家重點(diǎn)實(shí)驗(yàn)室，西安 710072；
2. 西北工業(yè)大學(xué) 材料科學(xué)與工程學(xué)院，西安 710072)
摘 要: 大型復(fù)雜薄壁殼體是航空航天等高技術(shù)產(chǎn)業(yè)迅速發(fā)展的迫切需求，帶橫向內(nèi)筋大型復(fù)雜薄壁殼體是其中的典型代表。然而，帶橫向內(nèi)筋大型復(fù)雜薄壁殼體多道次復(fù)合旋壓卻是一個(gè)多因素耦合作用下的復(fù)雜塑性成形過程。作者采用數(shù)值模擬和實(shí)驗(yàn)相結(jié)合的方法，以鋁合金帶橫向內(nèi)筋大型復(fù)雜薄壁殼體為代表，建立大型復(fù)雜薄壁殼體復(fù)合旋壓全過程仿真平臺(tái)與模型，研究不同條件下大型復(fù)雜薄壁殼體復(fù)合旋壓及其特征結(jié)構(gòu)旋壓過程中的不均勻塑性變形行為和成形缺陷的形成機(jī)理。揭示不同塑性變形行為對(duì)工件內(nèi)筋質(zhì)量的影響規(guī)律，獲得對(duì)不同塑性變形行為有決定性影響的因素，確定合理的毛坯、工藝和旋輪參數(shù)的選擇準(zhǔn)則。研究結(jié)果對(duì)發(fā)展大型復(fù)雜薄壁殼體精確成形技術(shù)具有重要的理論意義和實(shí)際應(yīng)用價(jià)值。
關(guān)鍵字: 鋁合金；大型復(fù)雜薄壁殼體；橫向內(nèi)筋；多道次復(fù)合旋壓；全過程仿真優(yōu)化
（1. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, China;
2. School of Materials Science and Engineering, Northwestern Pol, ytechnical University, Xi’an 710072, China）
Abstract:Large-sized complicated thin-walled aluminum alloy shells are the urgent needs of the development of aero-space high technology. Large-sized complicated thin-walled aluminum alloy shells with transverse inner ribs (LCTAASTIR) are one representative of those. But Multi-pass compound spinning of LCTAASTIR is one of the complicated plastic forming processes under the action of multi-parameters and their coupled effects. In this work, a modeling platform for the process was developed and some finite element models for the whole process were established. The characteristics of uneven deformation behaviors during the process and the forming mechanism of defects were investigated. The laws of different deformation behaviors on the quality of ribs were revealed, the decisive parameters on deformation behaviors were obtained, and the reasonable rules of blank, process and die parameters for the spinning process were determined. The achievements of this work are of significance to developing advanced theory and technology of precision plastic forming for LCTAASTIR.
Key words: aluminum alloy; large-sized complicated thin-walled shells; transverse inner ribs; multi-pass compound spinning; simulation and optimization for whole process
