Finite-element modelling of a novel flanging process on a cylinder with a large diameter–thickness ratio
Finite-element modelling of a novel flanging process on a cylinder with a large diameter–thickness ratio
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DOI：
10.1177/2041297510393627
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发表时间：
2011-06
期刊：
影响因子：
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通讯作者：
S. Fan;S. Zhao;Q. Zhang;C. H. Wang
中科院分区：
文献类型：
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作者：
S. Fan;S. Zhao;Q. Zhang;C. H. Wang
针对目前大径厚比翻边筒体加工方法存在的问题，提出了双辊夹紧旋压（DRCS）工艺作为一种新型的筒体翻边工艺。采用有限元数值模拟的方法对其进行了研究。首先，基于非线性有限元分析软件Abaqus/Explicit，建立了DRCS过程的有限元模型。其次，解决了DRCS有限元建模中的一些关键问题，如接触定义、啮合处理、滚子加载曲线、最佳夹紧位置和确定初始工件上的弯曲点等。然后，利用能量守恒原理和实验结果验证了有限元模型的可靠性。最后，利用验证的有限元模型对法兰的DRCS过程进行了仿真，得到了整个成形过程中法兰的等效应力场、等效应变场和壁厚分布。本研究建立的有限元模型可用于探索和发展DRCS过程。
To solve existing problems of current processing methods for flanged cylinders with a large diameter–thickness ratio, a double-roller clamping spinning (DRCS) process is proposed as a novel flanging process on a cylinder. Finite-element (FE) numerical simulation is used to research the DRCS process. First, on the basis of non-linear FE analysis software Abaqus/Explicit, an FE model for the DRCS process is established. Second, some key problems in FE modelling of DRCS are solved, for example, the definition of contact, the treatment of meshing, the load curves applied on the rollers, the optimal clamping position, and the bending point on the defined initial workpiece. Then, the reliability of the FE model is verified using the energy-conservation principle and experimental results. Finally, the DRCS process of the flange is simulated using the verified FE model, and the equivalent stress field, equivalent strain field, and wall-thickness distribution on the flange during the whole forming process are obtained. The FE model established in this study can be used to explore and develop the DRCS process.