对于合金的四轴柔性卷曲成型的回弹特性和影响规律
1College of Mechanic and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, China.
PloS one
|August 27, 2024
概括
控制合金卷曲中的反弹是至关重要的. 这项研究结合了实验和模拟,以显示速度和料率等过程参数如何影响弹,为精密制造提供了洞察力.
科学领域:
- 材料科学与工程 材料科学与工程
- 制造过程 制造过程 制造过程
- 机械工程 机械工程
背景情况:
- 在合金的曲中,Springback是一个重大的挑战,影响了尺寸精度.
- 精确控制反弹对于生产高质量的合金组件至关重要.
- 现有的方法缺乏对各种过程参数如何影响回弹的全面了解.
研究的目的:
- 为了研究和控制滚动曲过程中合金组件的弹现象.
- 建立关键过程参数和由此产生的弹回程之间的相关性.
- 为了对实验数据进行模拟模型的验证,以准确地预测反弹.
主要方法:
- 使用四轴柔性曲机用于精密曲设计的合金样品的实验方法.
- 使用高精度3D扫描仪实时监控三维 (3D) 形状变化.
- 先进的有限元软件模拟用于分析压力-应变分布和弹演变在不同的过程参数 (速度,料率,预变形,模具半径) 下.
主要成果:
- 在四轴弹性曲后,合金的回弹率在5%至15%之间.
- 增加滚筒曲速度 (从30mm/s到60mm/s) 导致回弹速度大约增加3%.
- 料率增加20%导致回弹量平均下降7%,这表明有抑制作用.
结论:
- 滚筒曲速度和料速度显著影响反弹,更高的速度加剧和适当的料速度减少它.
- 模具曲率半径和预变形量与回弹表现出非线性关系,提供了有效的调节可能性.
- 综合实验和模拟方法准确地描述了弹演变,为合金制造过程优化提供了基础.
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