锻压技术

机身大型蒙皮件拉形新工艺可行性研究

英文标题：Feasibility study on the new technology of large skin stretch forming

作者：李荣孙志莹郎利辉

分类号：

出版年,卷(期):页码：2014,39(10):47-51

摘要：

针对机身长宽比例差距较大的大型铝合金蒙皮件冷拉成形工艺研究，结合传统拉形工艺对比分析，提出一种新的蒙皮加工工艺—凹模纵向拉伸成形。采用数值模拟与实验相结合的方式对蒙皮拉形工艺加工过程中的缺陷进行分析。分析结果表明，对于长宽比例大于5的机身蒙皮零件，采用凹模纵向拉伸成形工艺方案，其板料承受的等效应力分布均匀且可以达到屈服，有利于减小回弹，回弹量可以控制在0.5 mm内。因此，利用凹模纵向冷拉成形工艺方案制造长宽比例大的铝合金蒙皮件，不仅可以节省材料、降低对设备的要求，而且可以获得高精度、高质量的铝合金蒙皮件。

Based on the study of stretch forming process of large aluminum alloy skin with a large length to width ratio and the analysis and comparison of traditional stretch forming process, a new process of skin stretch forming of longitudinal stretch forming with die was proposed. The forming defect during the skin stretch forming process was analyzed by combining the numerical simulation with experiments. Simulation results show that equivalent stresses are distributed uniformly and up to the yield limit so as to reduce the springback effectively. The springback can be controlled within 0.5 mm for skin, whose length to width ratio is larger than five. Therefore, aluminum alloy skin with large length to width ratio can be manufactured by longitudinal stretch forming with die, which not only saves materials and reduces requirements on equipment, but also obtains high precision and high-quality skin parts.

基金项目：

李荣（1979-），男，硕士，工程师

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