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| 基于随动支撑的板料渐进成形数值模拟 |
| Numerical Simulation of Incremental Sheet Forming Based on Follower Support |
| Received:June 15, 2023 |
| DOI：10.3969/j.issn.1674-6457.2023.10.013 |
| 中文关键词: 渐进成形 随动支撑 6061铝合金 数值模拟 对比分析 |
| 英文关键词: incremental forming follower support 6061 aluminum alloy numerical simulation contrast analysis |
| 基金项目:山东省重点研发计划(2019GGX102023) |
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| 中文摘要: |
| 目的 提出了基于随动支撑的板料渐进成形方法，研究基于随动支撑的渐进成形在刀具与随动板之间距离不同时成形精度、厚度、轴向力、等效应变和等效应力的变化情况。方法 通过对厚度为1 mm的6061铝合金板料分别进行普通渐进成形数值模拟、刀具与随动支撑板距离为1 mm和0.8 mm的随动支撑渐进成形数值模拟，分析了板料在成形过程中成形精度、厚度、轴向力和等效应变的变化情况，并将普通渐进成形数值模拟的结果与刀具和随动支撑板距离为1 mm和0.8 mm的基于随动支撑渐进成形数值模拟结果进行对比分析。结果 与普通渐进成形相比，随动支撑渐进成形能够提升成形精度，但当刀具与随动板之间的距离较小时，成形精度较差;随动支撑渐进成形板料侧壁厚度更薄，轴向力的数值及波动范围都更大，且随着刀具与随动支撑板之间距离的减小而增大。此外，当刀具与随动支撑板之间的距离为0.8 mm时，随动支撑渐进成形板料的等效应变会明显增大。结论 基于随动支撑的板料渐进成形在一定程度上可以提高板料成形精度。 |
| 英文摘要: |
| The work aims to propose an incremental sheet forming method based on the follower support, study the variation of forming accuracy, thickness, axial force, effective strain and equivalent stress of incremental sheet forming based on follower support at different distances between the tool and the follower plate. Numerical simulation of normal incremental forming, numerical simulation of incremental sheet forming based on the follower support with 1 mm and 0.8 mm clearance between the tool and the follower support plate were carried out for 6061 aluminium alloy sheets with a thickness of 1 mm, respectively. The changes in forming accuracy, thickness, axial force and effective strain of the sheet during the forming process were analyzed, and the results of the numerical simulation of normal incremental forming and the numerical simulation of incremental sheet forming based on the follower support with a clearance between the tool and the follower support plate of 1 mm and 0.8 mm were compared and analyzed. The results of the comparative analysis showed that, compared with the normal incremental sheet forming, the following support incremental sheet forming could improve the forming accuracy, but when the distance between the tool and the following plate was small, the forming accuracy was worse; the side wall thickness of the following support incremental forming sheet was thinner, and the axial force in forming was larger in value and the fluctuation range was larger than that of the normal single-point incremental sheet forming, and it increased with the decrease of the distance between the tool and the following support plate. In addition, when the distance between the tool and the follower support plate was 0.8 mm, the effective strain of the follower-supported incremental sheet forming of the sheet increased significantly. In conclusion, the incremental sheet forming of sheets based on the follower support can improve the sheet forming accuracy to a certain extent. |
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