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  本文選題：內(nèi)高壓成形　切入點：熱態(tài)　出處：《南京理工大學》2017年碩士論文　論文類型：學位論文

【摘要】：鋁合金材料更多的應(yīng)用于制造行業(yè)是結(jié)構(gòu)設(shè)計輕量化和材料輕量化有效結(jié)合起來的有效途徑。鋁合金材料常溫條件下成形性能差,通過提升溫度可以有效提高鋁合金材料的成形性能,內(nèi)高壓成形技術(shù)不同于傳統(tǒng)的成形技術(shù),可以成形復雜的空心變截面構(gòu)件,為了將鋁合金材料應(yīng)用于內(nèi)高壓成形技術(shù)中以達到輕量化設(shè)計的目的,內(nèi)高壓熱態(tài)成形技術(shù)的研究非常必要。本文就內(nèi)高壓熱態(tài)成形方向上展開研究,設(shè)計完成了一套可以進行內(nèi)高壓熱態(tài)成形實驗的設(shè)備,設(shè)備提供了完整的加熱控制回路,可以對成形管件加熱至成形溫度區(qū)間并進行精確的溫度控制;設(shè)備可以提供最高達到150MPa的內(nèi)高壓,有效保證成形內(nèi)壓力的供給,同時保證高壓環(huán)境下設(shè)備的整體密封性能;本文設(shè)計了可以更換模具的加熱箱腔體,可以根據(jù)后續(xù)實驗要求更換模具,進行后續(xù)的進一步實驗研究。本文基于GTN細觀損傷理論建立了有限元模型,利用數(shù)值模擬和實驗對比修正的方法獲取GTN模型參數(shù),并通過有限元分析軟件ABAQUS進行了 5754鋁合金管材內(nèi)高壓熱態(tài)成形的數(shù)值模擬,通過模擬研究分析了不同的溫度條件下材料的內(nèi)高壓熱態(tài)成形性能。最后,通過設(shè)計的內(nèi)高壓熱態(tài)成形設(shè)備對5754鋁合金管材進行了內(nèi)高壓熱態(tài)自由脹形實驗和成形實驗,通過實驗結(jié)果分析判斷了不同溫度條件下5754鋁合金材料的成形性能。
[Abstract]:Aluminum alloy materials are more widely used in manufacturing industry, which is an effective way to combine structural design lightweight and material lightweight effectively. The formability of aluminum alloy materials is poor at room temperature. The forming property of aluminum alloy can be improved by raising the temperature. The inner high pressure forming technology is different from the traditional forming technology and can form complex hollow variable section members. In order to apply aluminum alloy materials to the internal high pressure forming technology to achieve the purpose of lightweight design, it is very necessary to study the hot forming technology of the inner high pressure. In this paper, the direction of the internal high pressure hot state forming is studied. A set of equipment is designed and completed, which can be used for internal high pressure hot forming experiment. The equipment provides a complete heating control loop, which can be used to heat the forming tube to the forming temperature range and to carry out accurate temperature control. The equipment can provide up to 150 MPA of internal high pressure, effectively guarantee the supply of forming internal pressure, at the same time guarantee the overall sealing performance of the equipment under the high pressure environment. According to the requirements of subsequent experiments, the mould can be changed, and further experimental research can be carried out. In this paper, the finite element model is established based on GTN's meso-damage theory, and the parameters of GTN model are obtained by numerical simulation and experimental comparison and correction. Numerical simulation of high pressure hot forming of 5754 aluminum alloy tube was carried out by finite element analysis software ABAQUS. The experiment of forming 5754 aluminum alloy tube was carried out by means of the designed internal high pressure hot state forming equipment. The forming properties of 5754 aluminum alloy material under different temperature conditions were analyzed and judged by the experimental results.
【學位授予單位】：南京理工大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TG39

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