• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2021, Vol. 57 ›› Issue (12): 179-191.doi: 10.3901/JME.2021.12.179

• 材料科学与工程 • 上一篇    下一篇

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铝合金薄壁异形截面辗扩成形宏微观模拟

田笑1, 张恒2, 王恒强2, 王兵2, 陈飞1   

  1. 1. 上海交通大学模具CAD国家工程研究中心 上海 200030;
    2. 首都航天机械有限公司 北京 100076
  • 收稿日期:2020-08-18 修回日期:2021-01-13 出版日期:2021-08-31 发布日期:2021-08-31
  • 通讯作者: 陈飞(通信作者),男,1982年出生,博士,特别研究员,博士研究生导师。主要研究方向为金属热变形过程微观组织演变与预报、材料柔性化加工方法与装备。E-mail:feichen@sjtu.edu.cn
  • 作者简介:田笑,女,1995年出生,博士研究生。主要研究方向为高强铝合金薄壁异形截面辗扩成形理论与工艺。E-mail:tianxiao95@sjtu.edu.cn
  • 基金资助:
    航天一院创新CALT基金(CALT201809)和航天先进制造技术研究联合基金(U2037204)资助项目

Macro-and Microscopic Simulation of Ring Rolling for Aluminum Alloy Thin-walled Special-shaped Section Ring

TIAN Xiao1, ZHANG Heng2, WANG Hengqiang2, WANG Bing2, CHEN Fei1   

  1. 1. Engineering Research Center of Die and Mold CAD, Shanghai Jiao Tong University, Shanghai 200030;
    2. Capital Aerospace Machinery Company, Beijing 100076
  • Received:2020-08-18 Revised:2021-01-13 Online:2021-08-31 Published:2021-08-31

摘要: 环件轧制作为一种无缝环筒类构件先进塑性成形技术,目前还难以实现铝合金薄壁带筋锥筒构件的近净成形制造。针对2A14铝合金薄壁异形截面环件,建立其辗扩成形宏微观耦合分析有限元模型,选用矩形截面环件作为坯料,基于有限元模拟获得了优化后的轧制孔型,并探究坯料初始温度及芯辊进给速度对材料成形性和微观组织演变的影响规律,得到微观组织均匀且孔型填充性良好的辗环工艺参数。环坯温度为470℃,芯辊进给速度为1.2 mm/s,主辊旋转转速为30 r/min,上锥辊的压下速度为0.6 mm/s为最优工艺参数,能够满足2A14铝合金异形截面辗扩形/性控制要求,可为实际生产提供理论指导。

关键词: 辗环, 带筋薄壁锥筒, 2A14铝合金, 微观组织, 工艺优化

Abstract: As an advanced plastic forming technology for seamless rings, ring rolling is difficult to realize the near-net shaping of thin-walled conical aluminum alloy rings with inner ribs. For 2A14 aluminum alloy ring with thin-walled special shaped section, a coupled macro-micro finite element model of the ring rolling is developed. The ring with rectangular section is selected as the billet, the optimized roll shape is obtained by the finite element simulation. The effects of deformation temperature and feeding speed of mandrel on the formability and microstructure evolution of ring are investigated, which can obtain the ring rolling process parameters with uniform microstructure and good filling. The optimum process parameters are that the billet temperature is 470℃, the feeding speed of the mandrel is 1.2 mm/s, the king roll rotation speed is 30rpm, and the speed of the upper cone roll is 0.6mm/s, which supply the theoretical guidance for the actual manufacturing.

Key words: ring rolling, reinforced thin-wall cone ring, 2A14 aluminum alloy, microstructure, process optimization

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