内高压热态成形设备研发及成形技术研究

发布时间：2018-03-10 20:10

本文选题：内高压成形　切入点：热态　出处：《南京理工大学》2017年硕士论文　论文类型：学位论文

【摘要】：铝合金材料更多的应用于制造行业是结构设计轻量化和材料轻量化有效结合起来的有效途径。铝合金材料常温条件下成形性能差,通过提升温度可以有效提高铝合金材料的成形性能,内高压成形技术不同于传统的成形技术,可以成形复杂的空心变截面构件,为了将铝合金材料应用于内高压成形技术中以达到轻量化设计的目的,内高压热态成形技术的研究非常必要。本文就内高压热态成形方向上展开研究,设计完成了一套可以进行内高压热态成形实验的设备,设备提供了完整的加热控制回路,可以对成形管件加热至成形温度区间并进行精确的温度控制;设备可以提供最高达到150MPa的内高压,有效保证成形内压力的供给,同时保证高压环境下设备的整体密封性能;本文设计了可以更换模具的加热箱腔体,可以根据后续实验要求更换模具,进行后续的进一步实验研究。本文基于GTN细观损伤理论建立了有限元模型,利用数值模拟和实验对比修正的方法获取GTN模型参数,并通过有限元分析软件ABAQUS进行了 5754铝合金管材内高压热态成形的数值模拟,通过模拟研究分析了不同的温度条件下材料的内高压热态成形性能。最后,通过设计的内高压热态成形设备对5754铝合金管材进行了内高压热态自由胀形实验和成形实验,通过实验结果分析判断了不同温度条件下5754铝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.
【学位授予单位】：南京理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TG39

【参考文献】