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学者姓名：蒋凡
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Abstract ：
To address the surface oxidation and porosity defects in the wire-arc directed energy deposition of aluminum alloys, a laser-arc composite cleaning method is proposed for the irregular surface morphology of the deposited layer during the deposition process. The study analyzed the microscopic morphology of the surfaces after various cleaning methods and the changes in surface oxygen content, exploring the complementary rules and enhancement mechanisms of laser and electric arc cleaning in combined cleaning, as well as the optimal process parameter matching strategy. The effectiveness of the cleaning methods was evaluated by testing the porosity of the secondary deposited specimens after cleaning. The uncleaned specimens exhibited a porosity of 2.81%. Laser cleaning reduced this to 2.11%, while arc cleaning achieved 0.13%. The most significant reduction came from composite cleaning, with a minimum porosity of 0.05%. This indicates that composite cleaning can effectively reduce the porosity defects in additive manufacturing.
Keyword ：
porosity defects porosity defects arc cleaning arc cleaning oxygen content oxygen content Additive manufacturing Additive manufacturing cathodic spot cathodic spot
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| GB/T 7714 | Liu, Hao , Jiang, Fan , Li, Cheng et al. A novel interlayer cleaning methods for improving internal quality in wire-arc directed energy deposition: processing, characterisation and performance demonstration [J]. | VIRTUAL AND PHYSICAL PROTOTYPING , 2025 , 20 (1) . |
| MLA | Liu, Hao et al. "A novel interlayer cleaning methods for improving internal quality in wire-arc directed energy deposition: processing, characterisation and performance demonstration" . | VIRTUAL AND PHYSICAL PROTOTYPING 20 . 1 (2025) . |
| APA | Liu, Hao , Jiang, Fan , Li, Cheng , Zhu, Ruican , Liu, Wei , Yang, Di et al. A novel interlayer cleaning methods for improving internal quality in wire-arc directed energy deposition: processing, characterisation and performance demonstration . | VIRTUAL AND PHYSICAL PROTOTYPING , 2025 , 20 (1) . |
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Abstract ：
Arc additive manufacturing (AM) technology offers high deposition efficiency, making it well-suited for the fabrication of large and complex structural components. However, the repeated thermal cycling can lead to stress accumulation, with excessive residual stress potentially causing cracking and structural failure. The improved inherent strain method has demonstrated effectiveness in rapidly predicting stress in arc AM structures. Nevertheless, the existing inherent strain application schemes lack consideration for complex structures with thermal and mechanical mutations. To address this limitation, this study establishes a finite element model for a 30 degrees corner additive structure based on the thermo-elastoplastic (TEP) method and conducts experimental verification on the large-scale corner structure. By analyzing the influence of reheating effects in the corner region, multiple inherent strain application schemes were designed and evaluated. The scheme that applies the average inherent strain of the different trajectories showed good agreement with the TEP method in predicting X-direction stress. Compared with the TEP method, the average prediction error of X-stress in the linear center regions and corner regions of Path1 using the average inherent strain scheme is approximately 25 MPa and 46 MPa, significantly lower than the errors of 110 MPa and 130 MPa in the conventional inherent strain scheme. For Path2, the average corresponding prediction errors were about 53 MPa and 49 MPa. And the time cost of stress prediction using the inherent strain method is only 0.3% of that required by the TEP method. In the large 30 degrees corner structure with a side length of 0.3 m, the errors of the stress at the midpoint and inflection point of the first trajectory relative to the experimental measurement are approximately 40 MPa and 65 MPa, respectively.
Keyword ：
Stress prediction Stress prediction Arc additive manufacturing Arc additive manufacturing Inherent strain method Inherent strain method Corner structure Corner structure
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| GB/T 7714 | Jiang, Fan , Yang, Di , Xu, Bin et al. Numerical simulation of residual stress in arc additive manufacturing of corner structures based on the inherent strain method [J]. | INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY , 2025 , 137 (3-4) : 1727-1743 . |
| MLA | Jiang, Fan et al. "Numerical simulation of residual stress in arc additive manufacturing of corner structures based on the inherent strain method" . | INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY 137 . 3-4 (2025) : 1727-1743 . |
| APA | Jiang, Fan , Yang, Di , Xu, Bin , Ma, Ninshu , Cai, Xinhan , Zhang, Xiaoyong et al. Numerical simulation of residual stress in arc additive manufacturing of corner structures based on the inherent strain method . | INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY , 2025 , 137 (3-4) , 1727-1743 . |
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Abstract ：
变极性等离子弧（Variable Polarity Plasma Arc, VPPA）焊是一种高效的铝合金和镁合金焊接方法，其主要优势在于等离子电弧具有高能量密度，可以在焊接时穿透熔池形成小孔，大幅度降低焊接变形和残余应力，提高焊接质量。了解熔池小孔行为、电弧物理特性和控制方法对于优化和提高焊接过程的稳定性至关重要。本文综述了VPPA焊接技术发展的最新情况，对VPPA焊接过程信息的检测研究为深刻认识焊接稳定性机理提供了有力保障，尤其是利用X射线成像系统观测熔融金属流动的研究，对提升VPPA穿孔熔池物理本质的认识做出了重要贡献。此外，针对不同位置VPPA焊接的研究增加了这一焊接工艺的灵活性，由VPPA焊接衍生的多种拓展工艺拓宽了该焊接方法的适用范围。VPPA穿孔焊接技术以其焊接变形小、焊后无缺陷、单面焊接双面一次成形等优势，成为航空航天领域铝合金中厚板材焊接制造的优选工艺。
Keyword ：
熔池检测 熔池检测 电弧物理 电弧物理 变极性等离子弧焊 变极性等离子弧焊 复合焊接 复合焊接 稳定性控制 稳定性控制
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| GB/T 7714 | 蒋凡 , 张成钰 , 徐斌 et al. 变极性等离子弧焊技术发展及其在航天制造领域应用现状 [J]. | 航天制造技术 , 2024 , PageCount-页数: 12 (03) : 15-26 . |
| MLA | 蒋凡 et al. "变极性等离子弧焊技术发展及其在航天制造领域应用现状" . | 航天制造技术 PageCount-页数: 12 . 03 (2024) : 15-26 . |
| APA | 蒋凡 , 张成钰 , 徐斌 , 张国凯 , 闫朝阳 , 陈树君 . 变极性等离子弧焊技术发展及其在航天制造领域应用现状 . | 航天制造技术 , 2024 , PageCount-页数: 12 (03) , 15-26 . |
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Abstract ：
The twin-body plasma arc has the decoupling control ability of heat transfer and mass transfer, which is beneficial to shape and property control in wire arc additive manufacturing. In this paper, with the wire feeding speed as a characteristic quantity, the wire melting control ability of twin-body plasma arc was studied by adjusting the current separation ratio (under the condition of a constant total current), the wire current/main current and the position of the wire in the arc axial direction. The results showed that under the premise that the total current remains unchanged (100 A), as the current separation ratio increased, the middle and minimum melting amounts increased approximately synchronously under the effect of anode effect power, the first melting mass range remained constant; the maximum melting amount increased twice as fast as the middle melting amount under the effect of the wire feeding speed, and the second melting mass range was expanded. When the wire current increased, the anode effect power and the plasma arc power were both factors causing the increase in the wire melting amount; however, when the main current increased, the plasma arc power was the only factor causing the increase in the wire melting amount. The average wire melting increment caused by the anode effect power was approximately 2.7 times that caused by the plasma arc power. The minimum melting amount was not affected by the wire-torch distance under any current separation ratio tested. When the current separation ratio increased and reached a threshold, the middle melting amount remained constant with increasing wire-torch distance. When the current separation ratio continued to increase and reached the next threshold, the maximum melting amount remained constant with the increasing wire-torch distance. The effect of the wire-torch distance on the wire melting amount reduced with the increase in the current separation ratio. Through this study, the decoupling mechanism and ability of this innovative arc heat source is more clearly.
Keyword ：
Melting amount Melting amount Twin-body plasma arc Twin-body plasma arc Current separation ratio Current separation ratio Melting control ability Melting control ability
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| GB/T 7714 | Zhang, Ruiying , Jiang, Fan , Xue, Long . Experimental Study on Wire Melting Control Ability of Twin-Body Plasma Arc [J]. | CHINESE JOURNAL OF MECHANICAL ENGINEERING , 2024 , 37 (1) . |
| MLA | Zhang, Ruiying et al. "Experimental Study on Wire Melting Control Ability of Twin-Body Plasma Arc" . | CHINESE JOURNAL OF MECHANICAL ENGINEERING 37 . 1 (2024) . |
| APA | Zhang, Ruiying , Jiang, Fan , Xue, Long . Experimental Study on Wire Melting Control Ability of Twin-Body Plasma Arc . | CHINESE JOURNAL OF MECHANICAL ENGINEERING , 2024 , 37 (1) . |
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Abstract ：
This study investigates the mechanism behind the dual-stagnation points flow phenomenon in the keyhole plasma arc welding (KPAW) melt pool and develops a corresponding control strategy. Positional information on flow stagnation points was obtained using the macroscopic morphology of the melt pool and liquid flow velocity measurements. The position of these stagnation points, determined by the directional flow of liquid metal, is crucial for characterizing the stability of the welding process. The study delves into the driving force mechanism that produces stable directional flow and a uniform temperature distribution within the melt pool. A significant discovery of this research is the identification of high-speed directional material transport channels within the melt pool. Furthermore, a correlation mechanism between the positions of stagnation points and the stable flow with temperature distribution has been constructed. To address the unstable and destabilization stages of the welding process, a dynamic material stability transfer control strategy was designed, based on liquid flow velocity and temperature distribution. This strategy ensures a smooth transition during the unstable stage and rapid self-healing of the melt pool during destabilization. This study provides a novel control strategy and a theoretical foundation for the automation and enhancement of the KPAW welding process, highlighting its necessity in advancing welding technology.
Keyword ：
Control strategy Control strategy Filler wire Filler wire Liquid metal Liquid metal Heat transfer Heat transfer Convection pattern Convection pattern
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| GB/T 7714 | Liu, Jingbo , Jiang, Fan , Tashiro, Shinichi et al. The mechanism of dual-stagnation points flow phenomenon in keyhole plasma arc melt pool and corresponding control strategy [J]. | JOURNAL OF MANUFACTURING PROCESSES , 2024 , 125 : 473-488 . |
| MLA | Liu, Jingbo et al. "The mechanism of dual-stagnation points flow phenomenon in keyhole plasma arc melt pool and corresponding control strategy" . | JOURNAL OF MANUFACTURING PROCESSES 125 (2024) : 473-488 . |
| APA | Liu, Jingbo , Jiang, Fan , Tashiro, Shinichi , Chen, Shujun , Tanaka, Manabu , Zhang, Chengyu et al. The mechanism of dual-stagnation points flow phenomenon in keyhole plasma arc melt pool and corresponding control strategy . | JOURNAL OF MANUFACTURING PROCESSES , 2024 , 125 , 473-488 . |
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Abstract ：
本发明公开了调控等离子弧热力分布改善等离子增材制造中沉积层形貌装置和方法，该装置是在等离子增材制造条件下，通过对电弧的热力分布动态控制，调节电弧的热力作用，影响电弧的热力分布和热输入作用范围以及熔池流动行为，改善等离子弧增材制造中沉积层的形貌。同时该装置还与结构光相机相连，通过将相机提取到的表面信号与预设的沉积层形貌作比较所得的信息作为控制信号，控制动态推拉装置使钨极内缩量发生改变，改变沉积层的宽度和高毒，达到实时控制沉积层形貌的目标。
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| GB/T 7714 | 张国凯 , 许志合 , 蒋凡 et al. 调控等离子弧热力分布改善等离子增材制造中沉积层形貌装置和方法 : CN202310479070.9[P]. | 2023-04-28 . |
| MLA | 张国凯 et al. "调控等离子弧热力分布改善等离子增材制造中沉积层形貌装置和方法" : CN202310479070.9. | 2023-04-28 . |
| APA | 张国凯 , 许志合 , 蒋凡 , 陈树君 , 徐斌 , 彭勇 . 调控等离子弧热力分布改善等离子增材制造中沉积层形貌装置和方法 : CN202310479070.9. | 2023-04-28 . |
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Abstract ：
本发明公开了一种可调节电弧热力分布的等离子‑TIG一体化焊接设备，包括等离子焊枪和控制电路。所述等离子焊枪包括等离子电弧电源、高频发生器和钨电极；所述等离子电弧电源通过高频发生器与钨电极连接，钨电极正对工件；控制电路包括动态推拉装置，动态推拉装置和钨电极连接。该设备改进等离子焊接电路和起弧方式，进行等离子焊接时，起弧前利用动态推拉装置让钨极下移，减小工件与钨极之间的距离，使电弧与工件直接起弧，起弧后利用动态推拉装置让钨极向上移动，回收到喷嘴中，利用机械压缩、热压缩以及磁压缩的三重作用，形成稳定的拘束电弧，进入到等离子焊接正常工作状态，实现等离子焊接和TIG焊接的转化。
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| GB/T 7714 | 张国凯 , 许志合 , 蒋凡 et al. 一种可调节电弧热力分布的等离子-TIG一体化焊接设备 : CN202310479065.8[P]. | 2023-04-28 . |
| MLA | 张国凯 et al. "一种可调节电弧热力分布的等离子-TIG一体化焊接设备" : CN202310479065.8. | 2023-04-28 . |
| APA | 张国凯 , 许志合 , 蒋凡 , 陈树君 , 徐斌 , 彭勇 . 一种可调节电弧热力分布的等离子-TIG一体化焊接设备 : CN202310479065.8. | 2023-04-28 . |
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Abstract ：
本发明公开了变极性等离子弧焊连续变位置时熔池状态预测控制方法及装置，使用卷积神经网络+长短期记忆神经网络(CNN+LSTM)的模型预测小孔熔池后壁夹角。超前预测出的小孔熔池后壁夹角超过标准的小孔熔池后壁夹角阈值范围时，对后壁面驻点快速送丝，从而使得小孔熔池后壁夹角处于相对应的阈值范围内，进而提前遏制了小孔熔池的失稳及保证了良好的焊缝成形质量。
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| GB/T 7714 | 蒋凡 , 向鹏霖 , 张国凯 et al. 变极性等离子弧焊连续变位置时熔池状态预测控制方法及装置 : CN202310525584.3[P]. | 2023-05-11 . |
| MLA | 蒋凡 et al. "变极性等离子弧焊连续变位置时熔池状态预测控制方法及装置" : CN202310525584.3. | 2023-05-11 . |
| APA | 蒋凡 , 向鹏霖 , 张国凯 , 徐斌 , 刘靖博 , 成巍 et al. 变极性等离子弧焊连续变位置时熔池状态预测控制方法及装置 : CN202310525584.3. | 2023-05-11 . |
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Abstract ：
本发明涉及纳秒激光技术领域，尤其是涉及一种单晶氧化铝和金属铜的连接方法，包括以下步骤：使用纳秒激光扫描单晶氧化铝和金属铜的待连接处，实现对单晶氧化铝和金属铜的连接，所述纳秒激光的脉冲宽度为50‑200ns，激光重复频率为50‑500KHz，激光功率为5‑15W，激光光斑直径为20‑50μm，所述纳秒激光扫描时，扫描速度为30‑200mm/s，扫描线间距为40‑200μm，扫描次数为1‑10次。本发明使用纳秒激光对单晶氧化铝和金属铜进行连接，相比于扩散连接、钎焊和氧化物烧结等传统方法，具备连接效率更高的优势，相对于飞秒激光连接而言其成本更低，且纳秒激光器的发展更为完善适于工业应用。
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| GB/T 7714 | 潘瑞 , 冯英豪 , 陈树君 et al. 一种单晶氧化铝和金属铜的连接方法 : CN202310369112.3[P]. | 2023-04-07 . |
| MLA | 潘瑞 et al. "一种单晶氧化铝和金属铜的连接方法" : CN202310369112.3. | 2023-04-07 . |
| APA | 潘瑞 , 冯英豪 , 陈树君 , 周韬帅 , 杨东 , 董志森 et al. 一种单晶氧化铝和金属铜的连接方法 : CN202310369112.3. | 2023-04-07 . |
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Abstract ：
本发明公开了一种基于磁场偏转电弧尾焰的丝弧增材制造中熔滴温度的测量装置，涉及电弧增材制造技术领域。送丝机构进给焊丝，在电弧的作用下形成熔滴；电磁铁施加外加磁场，来产生电弧尾焰偏转角使电弧与落入量热计中的金属熔滴相分离；金属熔滴滴入量热计中，量热计对铜圆柱的温度变化进行监测，计算出熔滴到达量热计表面的温度，利用红外热像仪检测熔滴的温度损失，并将这部分温度损失补偿至固体铜量热计所测得的熔滴温度，得到熔滴本身较为精确的温度值。本发明将电弧尾焰和熔滴轨迹相分离，以避免电弧尾焰加热固体量热计而干扰熔滴温度的测量，来提高熔滴温度测量的精度，这对增材制造的温度测量和成形机理研究具有重要理论意义和价值。
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| GB/T 7714 | 蒋凡 , 蔡新翰 , 李诚 et al. 一种基于磁场偏转电弧尾焰的丝弧增材制造中熔滴温度的测量装置 : CN202310645875.6[P]. | 2023-06-02 . |
| MLA | 蒋凡 et al. "一种基于磁场偏转电弧尾焰的丝弧增材制造中熔滴温度的测量装置" : CN202310645875.6. | 2023-06-02 . |
| APA | 蒋凡 , 蔡新翰 , 李诚 , 张国凯 , 徐斌 , 彭勇 . 一种基于磁场偏转电弧尾焰的丝弧增材制造中熔滴温度的测量装置 : CN202310645875.6. | 2023-06-02 . |
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