稀有金属材料与工程
稀有金屬材料與工程
희유금속재료여공정
RARE METAL MATERIALS AND ENGINEERNG
2010年
6期
963-968
,共6页
赵冰%李志强%侯红亮%廖金华%白秉哲
趙冰%李誌彊%侯紅亮%廖金華%白秉哲
조빙%리지강%후홍량%료금화%백병철
钛合金%空心风扇叶片%有限元方法%超塑成形
鈦閤金%空心風扇葉片%有限元方法%超塑成形
태합금%공심풍선협편%유한원방법%초소성형
titanium alloy%hollow blade%finite element method(FEM)%superplastic forming (SPF)
随着高旁路涡扇发动机在军用、民用飞机上的应用,采用超塑成形/扩散连接(SPF/DB)技术制造大尺寸钛合金宽弦风扇叶片已经成为涡扇发动机的一项关键制造技术.钛合金空心风扇叶片的成形过程包括3个阶段:扭转成形、热成形、超塑成形.在本研究中,为了分析空心风扇叶片的成形过程,建立了一个三维有限元模型,钛合金的变形行为符合Backofen方程.通过三维有限元模型,分析扭转速率、热成形模具下落速度、超塑成形目标应变速率、板材与模具之间的摩擦系数、芯板和面板的厚度比等参数对成形力的影响规律.研究表明,随着扭转速度、热成形模具的下落速度、目标应变速率、板材厚度比的提高,成形力将提高,而摩擦系数对成形力的影响很小.
隨著高徬路渦扇髮動機在軍用、民用飛機上的應用,採用超塑成形/擴散連接(SPF/DB)技術製造大呎吋鈦閤金寬絃風扇葉片已經成為渦扇髮動機的一項關鍵製造技術.鈦閤金空心風扇葉片的成形過程包括3箇階段:扭轉成形、熱成形、超塑成形.在本研究中,為瞭分析空心風扇葉片的成形過程,建立瞭一箇三維有限元模型,鈦閤金的變形行為符閤Backofen方程.通過三維有限元模型,分析扭轉速率、熱成形模具下落速度、超塑成形目標應變速率、闆材與模具之間的摩抆繫數、芯闆和麵闆的厚度比等參數對成形力的影響規律.研究錶明,隨著扭轉速度、熱成形模具的下落速度、目標應變速率、闆材厚度比的提高,成形力將提高,而摩抆繫數對成形力的影響很小.
수착고방로와선발동궤재군용、민용비궤상적응용,채용초소성형/확산련접(SPF/DB)기술제조대척촌태합금관현풍선협편이경성위와선발동궤적일항관건제조기술.태합금공심풍선협편적성형과정포괄3개계단:뉴전성형、열성형、초소성형.재본연구중,위료분석공심풍선협편적성형과정,건립료일개삼유유한원모형,태합금적변형행위부합Backofen방정.통과삼유유한원모형,분석뉴전속솔、열성형모구하락속도、초소성형목표응변속솔、판재여모구지간적마찰계수、심판화면판적후도비등삼수대성형력적영향규률.연구표명,수착뉴전속도、열성형모구적하락속도、목표응변속솔、판재후도비적제고,성형력장제고,이마찰계수대성형력적영향흔소.
With the introduction of high by-pass turbofan engines into both commercial and military aircraft industries, the fabrication of large size fan blade through superplastic forming/diffusion bonding (SPF/DB) has become a pivotal technique of turbine fan engine. There are three key steps to form a hollow blade: twisting, hot forming and SPF. In this study, a three dimensional finite element method (FEM) model is established to simulate the forming process of titanium fan blade, in which the mechanical behavior of TC4 obeys Backofen's equation. Based on the numerical modeling, the influences of key factors such as the twisting rate, descending velocity, frictional coefficient, strain rate, the sheet thickness ratio of core sheet to face sheet on the forming force were studied. The results show that with increasing of the twisting rate, descending velocity, strain rote, the sheet thickness ratio of core sheet to face sheet, the forming forces increase; however the frictional coefficient has little influence on the forming force.