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作者:

Liu, Jingbo (Liu, Jingbo.) | Jiang, Fan (Jiang, Fan.) (学者:蒋凡) | Chen, Shujun (Chen, Shujun.) | Xu, Bin (Xu, Bin.) | Zhang, Guokai (Zhang, Guokai.)

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摘要:

The keyhole welding process in Variable Polarity Plasma Arc Welding enhances weld quality significantly, yet it introduces pool instability. Dynamic stability is pursued by investigating molten metal flowing within keyholes and their characteristics. Weld pool flow patterns are obtained via particle tracking, while instability characteristics are captured employing a high-speed camera. Analysing directional molten metal flow unveils Convergence and Separation Points in weld pool flow. The latter's displacement induces weld pool instability, resulting in an increase in keyhole area and a reduction in the pinch angle. The keyhole area signifies pool instability, while the rear wall angle reflects the welding state. These findings provide a theoretical basis for weld control and advance vision-based intelligent manufacturing welding techniques.

关键词:

Characteristic extraction Molten metal Fluid flow Destabilisation Keyhole welding Flow mechanism Aluminium alloy

作者机构:

  • [ 1 ] [Liu, Jingbo]Beijing Univ Technol, Fac Mat & Mfg, Engn Res Ctr Adv Mfg Technol Automot Components, Minist Educ, Beijing 100124, Peoples R China
  • [ 2 ] [Jiang, Fan]Beijing Univ Technol, Fac Mat & Mfg, Engn Res Ctr Adv Mfg Technol Automot Components, Minist Educ, Beijing 100124, Peoples R China
  • [ 3 ] [Chen, Shujun]Beijing Univ Technol, Fac Mat & Mfg, Engn Res Ctr Adv Mfg Technol Automot Components, Minist Educ, Beijing 100124, Peoples R China
  • [ 4 ] [Xu, Bin]Beijing Univ Technol, Fac Mat & Mfg, Engn Res Ctr Adv Mfg Technol Automot Components, Minist Educ, Beijing 100124, Peoples R China
  • [ 5 ] [Zhang, Guokai]Beijing Univ Technol, Fac Mat & Mfg, Engn Res Ctr Adv Mfg Technol Automot Components, Minist Educ, Beijing 100124, Peoples R China
  • [ 6 ] [Liu, Jingbo]Osaka Univ, Joining & Welding Res Inst, Osaka, Japan
  • [ 7 ] [Xu, Bin]Osaka Univ, Joining & Welding Res Inst, Osaka, Japan
  • [ 8 ] [Jiang, Fan]Qilu Univ Technol, Laser Inst, Shandong Acad Sci, Jinan, Peoples R China
  • [ 9 ] [Xu, Bin]Harbin Inst Technol, State Key Lab Adv Welding & Joining, Harbin, Peoples R China

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来源 :

SCIENCE AND TECHNOLOGY OF WELDING AND JOINING

ISSN: 1362-1718

年份: 2023

期: 9

卷: 28

页码: 932-940

3 . 3 0 0

JCR@2022

ESI学科: MATERIALS SCIENCE;

ESI高被引阀值:26

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