工艺参数对双层304不锈钢波纹管液压胀形的影响

发布时间：2018-06-26 10:37

本文选题：双层波纹管 + 液压胀形　；参考：《塑性工程学报》2017年04期

【摘要】：为提高波纹管的成形质量以及合理选取胀形工艺参数,基于有限元分析软件ABAQUS模拟304不锈钢双层波纹管液压胀形过程,并利用实验验证了有限元模型的正确性。基于建立的模型,研究了内压力、模具行程、挤压速度和加载路径对波纹管成形的影响。结果表明,影响双层波纹管液压胀形壁厚减薄和波高的主要工艺参数为内压力和模具行程;随着内压力和模具行程的增大,最大壁厚减薄率和波高均线性增大,且内外层壁厚差值增大;过大的内压和挤压速度会导致波高不均匀性增大;降低起波阶段内压力及在成形初期施加轴向进给的加载路径有利于减小波纹管的减薄率。最后,通过双层波纹管的液压胀形实验验证了数值模拟的正确性。
[Abstract]:In order to improve the forming quality of the bellows and to select the bulging parameters reasonably, the hydraulic bulging process of 304 stainless steel bilayer bellows was simulated based on the finite element analysis software Abaqus, and the correctness of the finite element model was verified by experiments. Based on the established model, the effects of internal pressure, die stroke, extrusion speed and loading path on bellows forming were studied. The results show that the main process parameters affecting the wall thickness thinning and wave height of double-layer bellows are internal pressure and die stroke, and the maximum wall thickness thinning rate and wave height mean linearity increase with the increase of internal pressure and die stroke. The difference of inner and outer layer wall thickness is increased, too large internal pressure and extrusion speed will lead to the increase of wave height inhomogeneity, and the reduction of internal pressure and the loading path of axial feeding at the initial stage of forming will help to reduce the thinning rate of bellows. Finally, the correctness of the numerical simulation is verified by the hydraulic bulging experiment of the double-layer bellows.
【作者单位】：西安石油大学材料学院材料加工工程重点实验室;西北工业大学凝固技术国家重点实验室;南京晨光东螺波纹管有限公司;
【基金】：国家自然科学基金资助项目(51405386) 陕西省自然科学基础研究计划项目(2014JQ7237) 陕西省高校科协青年人才托举计划项目(20170518) 西北工业大学凝固技术国家重点实验室开放课题资助项目(SKLSP201403) 西安石油大学青年科研创新团队资助项目(2015QNKYCXTD02)
【分类号】：TG306

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