方锥件渐进成形扭曲规律及影响因素

发布时间：2018-06-02 05:06

本文选题：锥形件 + 扭曲位移　；参考：《锻压技术》2017年04期

【摘要】：渐进成形中,工具头在成形过程中不断推压板料,造成板料产生扭曲变形,影响零件的尺寸精度。为降低零件扭曲程度,提高零件成形精度,以方锥件为例,借助有限元数值模拟,研究渐进成形过程中板料扭曲变形规律,并采用单因素分析法,分析渐进成形各工艺参数对板料扭曲的影响。结果显示,零件底部和侧壁的板料产生了一定程度的扭曲,随着成形深度的增加,扭曲位移最大的位置逐渐向侧壁中部靠近,最终扭曲程度沿侧壁大致呈抛物线分布,且随着工具头半径的减小和层间距的增大,零件扭曲程度加剧。结果表明,通过改变工具头半径和层间距能降低零件扭曲程度,提高零件成形精度。
[Abstract]:In the process of progressive forming, the tool head continuously pushes the sheet metal during the forming process, resulting in the distortion of the sheet metal, which affects the dimensional accuracy of the parts. In order to reduce the distortion degree of the parts and improve the forming accuracy of the parts, taking the square cone as an example, with the help of finite element numerical simulation, the law of sheet metal distortion and deformation in the process of progressive forming is studied, and the single factor analysis method is used. The effect of process parameters on sheet metal distortion was analyzed. The results show that the sheet metal on the bottom and side wall of the part has a certain degree of distortion. With the increase of forming depth, the position of the maximum distortion displacement is gradually approaching to the middle of the side wall, and the final distortion degree is approximately parabola distribution along the side wall. With the decrease of the radius of the tool head and the increase of the interval between layers, the distortion degree of the parts is aggravated. The results show that the distortion degree of the parts can be reduced and the forming accuracy can be improved by changing the radius of the tool head and the interval between the layers.
【作者单位】：福州大学至诚学院;
【基金】：国家级大学生创新创业训练计划项目(201613470002) 福建省教育厅科技项目(JAT160660)
【分类号】：TG306

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