铝合金旋压封口技术的研究

发布时间：2018-06-12 04:01

本文选题：铝合金封口 + 旋压　；参考：《长春理工大学》2017年硕士论文

【摘要】：本文主要利用旋压工艺研究铝合金气瓶封口成形。旋压工艺成形技术作为一种先进的塑性成形工艺,已经广泛应用于国防军工和航空航天领域。旋压成形占据铝合金气瓶成形的绝大部分,对其核心工艺的研究有着重要的参考意义。本文采用ABAQUS进行实际封口过程的有限元模拟,分析了成形机理和成形过程中的受力情况。同时从旋压温度、进给量等方面研究其对铝合金封口成形的影响。通过有限元模拟得到合理的实验参数,为以后实际生产提供理论支持。研究结果如下。(1)通过有限元模拟分析铝合金封口过程,可以得出封口过程中铝合金的应力应变状态。旋轮与坯料接触区域受力为三向应力状态,径向旋压分力最大,切向旋压分力最小。(2)通过不同的工艺参数进行有限元分析,然后得到比较合理的一组参数。合适的温度以及旋轮进给量都是影响封口质量的重要参数。(3)根据实验结果,分析实验过程中出现缺陷的原因,坯料缺陷、工艺参数等都跟封口缺陷的产生有关,同时根据缺陷提出了相应的预防措施。通过有限元模拟跟实验的结果对比表明:有限元模拟得到的结果起到一定的参考作用,但不能完全依赖于模拟的结果,还需要通过实验来进一步优化工艺参数,最后得到最优的工艺方案。
[Abstract]:In this paper, the spinning process is used to study the seal forming of aluminum alloy cylinder. As an advanced plastic forming technology, spinning process has been widely used in the field of national defense and aerospace industry. Spinning forming accounts for the majority of aluminum alloy cylinder forming, which has important reference significance for the study of its core technology. In this paper, Abaqus is used to simulate the actual sealing process by finite element method, and the forming mechanism and the stress during the forming process are analyzed. At the same time, the effect of spinning temperature and feed rate on aluminum alloy seal forming was studied. Reasonable experimental parameters are obtained by finite element simulation, which provides theoretical support for practical production in the future. The results are as follows: 1) the stress and strain state of aluminum alloy can be obtained by finite element simulation. The contact zone between the rotary wheel and the blank is in a three-direction stress state, the radial spinning force is the largest, and the tangential spinning force is the smallest. The finite element analysis is carried out through different process parameters, and then a more reasonable set of parameters is obtained. Appropriate temperature and feed rate of rotary wheel are important parameters affecting sealing quality. According to the experimental results, the causes of defects in the experiment process, blank defects, technological parameters and so on are all related to the production of sealing defects. At the same time, the corresponding preventive measures are put forward according to the defects. The comparison between finite element simulation and experimental results shows that the results obtained by finite element simulation play a certain reference role, but can not be completely dependent on the results of simulation, and need to be further optimized by experiments. Finally, the optimal process scheme is obtained.
【学位授予单位】：长春理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TG306

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