• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2023, Vol. 59 ›› Issue (13): 228-237.doi: 10.3901/JME.2023.13.228

• 数字化设计与制造 • 上一篇    下一篇

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再制造工作辊热轧退化脉冲涡流在线监测方法研究

宋守许1,2, 蔚辰1,2, 李想1,2, 徐瑞1,2   

  1. 1. 合肥工业大学机械工程学院 合肥 230009;
    2. 合肥工业大学机械工业绿色设计与制造重点实验室 合肥 230009
  • 收稿日期:2022-04-28 修回日期:2022-08-16 出版日期:2023-07-05 发布日期:2023-08-15
  • 通讯作者: 蔚辰(通信作者),男,1995年出生,博士研究生。主要研究方向为机电产品绿色设计与再制造,热轧在线监测技术。E-mail:wee_chen@163.com
  • 作者简介:宋守许,男,1964 年出生,博士,教授。主要研究方向为机电产品绿色设计与绿色制造、再制造理论与技术、产品再资源化技术与装备。E-mail:shouxus@163.com
  • 基金资助:
    国家自然科学基金资助项目(51975176)。

A Novel On-Line Monitoring Method of Remanufacturing HSS Work Roll Degeneration Based on Pulsed Eddy Current Testing

SONG Shouxu1,2, WEI Chen1,2, LI Xiang1,2, XU Rui1,2   

  1. 1. School of Mechanical Engineering, Hefei University of Technology, Hefei 230009;
    2. Key Laboratory for Green Design and Manufacturing of Machinery Industry, Hefei University of Technology, Hefei 230009
  • Received:2022-04-28 Revised:2022-08-16 Online:2023-07-05 Published:2023-08-15

摘要: 再制造工作辊熔覆层在高温潮湿的工作环境中易发生复杂的氧化退化行为,而其辊面性能的下降对轧件质量会产生巨大影响。通过热轧模拟试验揭示了工业热轧条件下的再制造工作辊辊面退化过程,发现热轧过程中高速钢熔覆层发生马氏体基体碳析出以及合金碳化物的分解与析出,引发熔覆层硬度下降和马氏体基体磁性软化。基于熔覆层马氏体基体磁性软化现象,构建了一套高速钢再制造氧化退化过程的脉冲涡流监测方法与系统,并提出一种变分模态分解-希尔伯特(Variational mode decomposition-Hilbert,VMD-Hilbert)方法,该方法可在脉冲涡流相应信号中有效提取再制造高速钢工作辊熔覆层的退化信息。最后,以0~5 000 Hz频率内脉冲涡流信号的边际谱加权和为新特征,实现再制造高速钢工作辊热轧退化状态的定量表征。所构建的脉冲涡流在线监测方法可适用于监测各类再制造工作辊的高温退化过程,具有广阔应用前景。

关键词: 在线监测, 再制造, 工作辊, 脉冲涡流, VMD-Hilbert变换

Abstract: The cladding layer of remanufacturing roll is prone to complex oxidation degradation in high temperature and humid working environment, and the degradation of roll surface have a great impact on the quality of products. The degradation mechanism of remanufacturing work roll under industrial hot rolling condition is revealed by hot rolling simulation test. It is found that martensite carbon precipitates and alloy carbides decompose and precipitate in HSS cladding layer during hot rolling, which leads to the decrease of hardness and magnetic softening of martensite matrix. Based on the magnetic softening of martensite matrix in cladding layer, a set of pulse eddy current monitoring method and system for oxidation degradation process of remanufacturing work roll is established. Variational mode decomposition- Hilbert (VMD-Hilbert) Transform was proposed to extract information of pulse eddy current response signal effectively, and the problem of mode mixing in Hilbert-Huang Transform (HHT) is solved. Finally, the marginal spectrum weighted sum of pulsed eddy current signals within the frequency range of 0-5 000 Hz was presented as a new feature, degradation state of remanufactured HSS work roll is quantitatively characterized. The pulsed eddy current online monitoring method constructed in this paper can be used to monitor the high temperature degradation process of all kinds of remanufacturing work rolls and has broad application prospects.

Key words: on-line monitoring, remanufacturing, work roll pulsed, eddy current, VMD-Hilbert transformation

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