邓桦坤,郑月,毛云飞,等.铝合金车门把手磁脉冲成形工艺中贴模性能研究[J].精密成形工程,2021,13(4):16-22.
DENG Hua-kun,ZHENG Yue,MAO Yun-fei,et al.Research on Die Matching Performance in Electromagnetic Forming Process of Aluminum Alloy Door Handle[J].Journal of Netshape Forming Engineering,2021,13(4):16-22. |
| 铝合金车门把手磁脉冲成形工艺中贴模性能研究 |
| Research on Die Matching Performance in Electromagnetic Forming Process of Aluminum Alloy Door Handle |
| 投稿时间：2021-04-14 |
| DOI：10.3969/j.issn.1674-6457.2021.04.003 |
| 中文关键词: 铝合金 电磁成形 PDV 形状偏差 |
| 英文关键词: aluminum alloy electromagnetic forming PDV shape deviation |
| 基金项目:国家自然科学基金(51975202) |
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| 中文摘要: |
| 目的 研究铝合金在磁脉冲成形后零件轮廓的形状偏差与工艺参数之间的关系，分析形状偏差形成原因。方法 开展螺旋线圈不同放电能量下的汽车车门把手零件的成形实验，并采用光子多普勒测速系统(Photonic doppler velocimeter，PDV)测速，利用Dyna/EM模块建立的数值模型，主要从电磁力的分布、应力波的传播效应和励磁源的影响3个方面进行对比分析。结果 零件和模具的形状偏差根据其位置存在不同，短轴区域的偏差明显大于长轴区域。形状缺陷主要是由电磁力的分布情况和惯性效应造成的。放电电流频率会影响板料和模具之间的回弹效应。结论 降低电流频率以及改变线圈电磁力分布可以有效抑制板料的回弹，提高板料贴模性能。 |
| 英文摘要: |
| This paper aims to study the relationship between shape deviation and process parameters of aluminum alloy parts after electromagnetic forming, and analyze the causes of shape deviation. The automobile door handle forming experiment under different discharge energy of helical coil has been conducted. The photonic doppler velocimeter (PDV) has been adopted to measure the velocity. By means of the numerical model established based on the Dyna/EM module, the comparative analysis has been made from three aspects:the distribution of electromagnetic force, the propagation effect of stress wave and the influence of excitation source. The results are as follows:The shape deviation between the part and the die varies with their positions, and the deviation of the short axis area is obviously larger than that of the long axis area. The shape defect is mainly caused by the distribution of electromagnetic force and inertia effect. The frequency of discharge current affects the rebound effect between the sheet and the die. Therefore, reducing the current frequency and changing the electromagnetic force distribution of the coil can effectively inhibit the rebound of the sheet and improve the die matching performance of the sheet. |
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