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针对7075-T6高强铝合金在室温下屈服强度高、塑性变形能力差，常规工艺下零件易出现开裂和回弹缺陷的问题，提出了一种电磁驱动内直孔翻边工艺。分析了不同驱动板厚度和放电电压对板料翻边质量的影响，发现随着驱动板厚度的增加，板料贴模精度增加、零件口部破裂被抑制。但过厚驱动板的变形抗力增大，相同电压下零件的贴模性变差。随着放电电压的增加，零件贴模精度逐渐增加。采用驱动板厚度为2 mm和放电电压为8 kV,实现室温下7075-T6铝合金翻边零件的高精度成形。通过ANSYS与ABAQUS软件联合仿真，发现驱动板能够降低翻边件口部的周向拉应力和弹性应变能，有效抑制破裂、回弹缺陷的产生。
Abstract：Aiming at the problems that 7075-T6 high strength aluminum alloy has high yield strength and poor plastic deformation ability at room temperature, and the parts are prone to defects of ruptuer and springback under the conventional process, an electromagnetic driven internal straight hole flanging process was proposed. The influence of different driving sheet thicknesses and discharge voltages on the quality of sheet flanging was analyzed. It is found that with the increase of the driving sheet thickness, the precision of the sheet molding accuracy increases, and the rupture of the mouth of the part was suppressed. However, the deformation resistance of too thick driving sheet increases, and the moldability of the part under the same voltage becomes worse. As the discharge voltage increases, the molding accuracy of the part increases gradually. The high precision forming of 7075-T6 aluminum alloy flanging parts at room temperature was achieved by adopting the driving sheet thickness of 2 mm and the discharge voltage of 8 kV. By means of joint simulation of ANSYS and ABAQUS softwares, it is found that the driving sheet can reduce the circumferential tensile stress and elastic strain energy at the mouth of the flanging part, and effectively inhibit the generation of rupture and springback defects.
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基本信息:
中图分类号:TG306
引用信息:
[1]韩艳彬,杜志浩,张海宝,等.7075-T6铝合金板材电磁驱动翻边成形工艺研究[J].塑性工程学报,2025,32(09):47-54.
基金信息:
国家重点研发计划(2024YFE0108800; T24KITG-014); 国家自然科学基金资助项目(52275394); 湖南省杰出青年基金资助项目(2025JJ20040); 哈尔滨工业大学金属精密热加工国家级重点实验室开放课题(JCKYS2024603C007); 湖南省研究生创新项目(2024ZZTS0130)
2025-09-28
2025-09-28
2025-09-28