| 引用本文: | 陈继平,邹军,沈翔,王会廷,钱健清.渐进成形A3003铝板减薄带分析及数值模拟研究[J].材料科学与工艺,2018,26(3):89-96.DOI:10.11951/j.issn.1005-0299.20170148. |
| CHEN Jiping,ZOU Jun,SHEN Xiang,WANG Huiting,QIAN Jianqing.Analysis and numerical simulation study on the thinning belt of A3003 aluminum sheet metal incremental forming[J].Materials Science and Technology,2018,26(3):89-96.DOI:10.11951/j.issn.1005-0299.20170148. |
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| 摘要: |
| 研究渐进成形过程中板料减薄带的变化，可以提供合理的加工参数，提高板料的成形性能和加工利用率，减少零件破裂失效.基于渐进成形过程中金属板料轮廓的变化与理想情况下轮廓的区别，对渐进成形初始成形阶段A3003铝板减薄带的产生原因和剪切力的变化过程进行了理论分析，并通过有限元模拟分别从未变形区金属板料的长度和强度两个角度对板料渐进成形过程中未变形区下沉的影响, 以及成形角度和杨氏模量对变形区回弹的影响两个方面, 对减薄带的产生原因进行研究.结果表明:板料未变形区的下沉和变形区的回弹使板料在初始加工阶段形成一段平缓区域，工具头在平缓区域的变形性质发生了变化，平缓区域发生剪切变形导致了板料在初始加工阶段形成了减薄带; 渐进成形时减小板料未变形区的长度，增大板料与垂直方向的角度可以一定程度上阻碍减薄带的产生，模拟结果与理论分析相符合.
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| 关键词: 减薄带 剪切力 渐进成形 锥形件 铝板 |
| DOI：10.11951/j.issn.1005-0299.20170148 |
| 分类号:TB31 |
| 文献标识码:A |
| 基金项目:国家自然科学基金资助项目(51275003)；安徽省自然科学基金项目(1508085ME78). |
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| Analysis and numerical simulation study on the thinning belt of A3003 aluminum sheet metal incremental forming |
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CHEN Jiping,ZOU Jun,SHEN Xiang,WANG Huiting,QIAN Jianqing
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(School of Metallurgical Engineering, Anhui University of Technology, Ma′anshan 243002, China)
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| Abstract: |
| The study on the sheet metal thinning belt variation during the incremental forming could provide the reasonable processing parameters, improve the formability of sheet metal and machining efficiency, and reduce the rupture failure of the parts. Based on the difference in ideal sheet metal profile and the sheet metal profile variation during sheet metal incremental forming, the reason of thinning belt formation and the shearing force variation at initial stage of A3003 aluminium sheet metal incremental forming are theoretically revealed. The reason of thinning belt formation is studied by finite element simulation on the effects of length and strength of undeformed zone on its subsidence, and the effects of deformation angle and Young′s modulus on springback of deformed area. The results show that a flat region is formed during initial sheet metal processing stage due to subsidence of undeformed zone and springback of deformed area. The shear deformation of the flat region leads to the formation of sheet metal thinning belt. The decrease in the length of undeformed zone and the increase in the angle of sheet metal with vertical direction during sheet metal incremental forming can block the formation of thinning belt in a certain extent. The finite element simulation results coincide with the theoretical analysis.
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| Key words: thinning belt shearing force incremental forming conical part aluminum sheet |
