• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2025, Vol. 62 ›› Issue (6): 121-131.doi: 10.3901/JME.260179

• 特邀专栏:轧制技术与智能化 • 上一篇    

扫码分享

铝合金空心轴形孔同步成形协调机制与智能调控

束学道1,2, 陈宇森1,2, 王英1,2, 代月晨1,2, 左锦荣1,2, 张庆东1,2   

  1. 1. 宁波大学机械工程与力学学院 宁波 315211;
    2. 浙江省零件轧制成形技术研究重点实验室 宁波 315211
  • 收稿日期:2025-05-24 修回日期:2025-11-22 发布日期:2026-05-12
  • 作者简介:束学道,男,1968年出生,博士,博士研究生导师。主要研究方向为金属塑性成形工艺。E-mail:shuxuedao@nbu.edu.cn
  • 基金资助:
    国家自然科学基金(U23A20629,52375346)和宁波大学研究生科研创新资助项目。

Coordination Mechanism and Intelligent Regulation of Simultaneous Forming of Hollow Shaft-shaped Holes in Aluminum Alloys

SHU Xuedao1,2, CHEN Yusen1,2, WANG Ying1,2, DAI Yuechen1,2, ZUO Jinrong1,2, ZHANG Qingdong1,2   

  1. 1. Faculty of Mechanical Engineering and Mechanics, Ningbo University, Ningbo 315211;
    2. Part Rolling Key Laboratory of Zhejiang Province, Ningbo 315211
  • Received:2025-05-24 Revised:2025-11-22 Published:2026-05-12

摘要: 针对目前钢制空心车轴生产中存在重量大、制造成本高、能源消耗大等问题,提出以7系铝合金替代钢制空心轴,采用形孔同步成形制造空心轴类件新工艺。基于ABAQUS建立7075铝合金空心轴形孔同步成形数值模拟仿真模型,分析不同压下率、偏转角以及顶头前伸量对斜连轧轧卡现象的影响,以及两组辊转速、偏转角对成形件壁厚和不圆度的影响规律,通过双输入双输出模糊控制器控制轧辊转速和夹具牵引速度,提高轧件几何数据获取精度。研究结果表明,7075铝合金斜连轧中内扩径率是判断轧卡的重要指标,若选择不当的工艺参数会导致斜连轧轧卡现象的产生,导致轧制无法完成。但过低轧辊的转速和偏转角均会导致轧件壁厚均匀性下降,造成局部出现轧件圆度下降现象,并通过设计模糊控制器与有限元求解器耦合,实现轧辊与夹具运动的实时调控,当模糊控制后,轧件数据波动集中在0.07~0.15,最大值与最小值的差距缩小约38%,表明采用模糊控制读取轧件几何数据能有效控制轧件壁厚均匀性和圆度,为实现智能化制造高精度铝合金空心轴提供新思路。

关键词: 形孔同步, 7075铝合金, 空心轴, 模糊控制, 算法优化

Abstract: A new manufacturing process is proposed to address the high weight, cost, and energy consumption associated with conventional steel hollow railway axles. In this approach, 7xxx series aluminum alloy is utilized to replace steel, and a shape-hole synchronous forming method is employed for the production of hollow axle components. A finite-element model of the 7075 aluminum alloy hollow axle forming process is established in ABAQUS. The influences of reduction ratio, roll yaw angle, and mandrel advance amount on rolling-lock phenomena during skew rolling are analyzed, along with the effects of dual-roll rotational speed and yaw angle on wall thickness uniformity and ovality. A dual-input dual-output fuzzy controller is implemented to regulate roll rotational speed and gripper traction velocity, thereby enhancing the accuracy of geometric data acquisition. The internal expansion ratio is identified as a critical indicator for predicting rolling-lock occurrences. Improper parameter selection is demonstrated to initiate rolling-lock and terminate the process prematurely. Conversely, excessively low roll speeds or yaw angles are found to deteriorate wall thickness uniformity and induce localized ovality increases. Through coupling of the fuzzy controller with the finite-element solver, real-time adjustment of roll and gripper motions is achieved. After fuzzy control implementation, data fluctuation is confined within the 0.07-0.15 range, and peak-to-valley deviation is reduced by approximately 38%. The results confirm that fuzzy-controlled acquisition of geometric data effectively improves wall thickness uniformity and circularity, providing a new approach for intelligent manufacturing of high-precision aluminum alloy hollow axles.

Key words: shape-hole synchronization, 7075 aluminum alloy, hollow axle, fuzzy control, algorithm optimization

中图分类号: