Humping Formation and Suppression in High-Speed Laser Welding
Increasing welding speed can promote the productivity of laser welding. However, humping defects often occur, which limits the application of this strategy. The existing explanations for the humping formation remain vague, and mitigation and suppression methods are limited. In this research, high-sp...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-03-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/15/7/2420 |
| _version_ | 1797438685174562816 |
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| author | Boce Xue Baohua Chang Shenghua Wang Runshi Hou Peng Wen Dong Du |
| author_facet | Boce Xue Baohua Chang Shenghua Wang Runshi Hou Peng Wen Dong Du |
| author_sort | Boce Xue |
| collection | DOAJ |
| description | Increasing welding speed can promote the productivity of laser welding. However, humping defects often occur, which limits the application of this strategy. The existing explanations for the humping formation remain vague, and mitigation and suppression methods are limited. In this research, high-speed imaging experiments and numerical simulation of the high-speed laser welding process are performed. Through careful examination, the humping phenomenon is explained. At high welding speed, the high-speed melt flow caused by recoil pressure is hindered by the solidified region in the melt pool, leading to the occurrence of a swelling. The swelling then grows, forming a valley in front of the swelling under the effect of surface tension. The solidification of the valley results in the occurrence of a second swelling. This process repeats and humping defect forms. Marangoni force and viscous force also have influence on this process. In addition, it is found that adding a Tungsten Inert Gas arc behind the laser beam can effectively suppress the humping. |
| first_indexed | 2024-03-09T11:41:49Z |
| format | Article |
| id | doaj.art-c2f6dea35f8c4757ad29807c88380676 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-09T11:41:49Z |
| publishDate | 2022-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-c2f6dea35f8c4757ad29807c883806762023-11-30T23:31:55ZengMDPI AGMaterials1996-19442022-03-01157242010.3390/ma15072420Humping Formation and Suppression in High-Speed Laser WeldingBoce Xue0Baohua Chang1Shenghua Wang2Runshi Hou3Peng Wen4Dong Du5Department of Mechanical Engineering, Tsinghua University, Beijing 100084, ChinaDepartment of Mechanical Engineering, Tsinghua University, Beijing 100084, ChinaHangzhou Kaierda Robot Technology Co., Ltd., Hangzhou 311232, ChinaHangzhou Kaierda Robot Technology Co., Ltd., Hangzhou 311232, ChinaDepartment of Mechanical Engineering, Tsinghua University, Beijing 100084, ChinaDepartment of Mechanical Engineering, Tsinghua University, Beijing 100084, ChinaIncreasing welding speed can promote the productivity of laser welding. However, humping defects often occur, which limits the application of this strategy. The existing explanations for the humping formation remain vague, and mitigation and suppression methods are limited. In this research, high-speed imaging experiments and numerical simulation of the high-speed laser welding process are performed. Through careful examination, the humping phenomenon is explained. At high welding speed, the high-speed melt flow caused by recoil pressure is hindered by the solidified region in the melt pool, leading to the occurrence of a swelling. The swelling then grows, forming a valley in front of the swelling under the effect of surface tension. The solidification of the valley results in the occurrence of a second swelling. This process repeats and humping defect forms. Marangoni force and viscous force also have influence on this process. In addition, it is found that adding a Tungsten Inert Gas arc behind the laser beam can effectively suppress the humping.https://www.mdpi.com/1996-1944/15/7/2420high-speed laser weldinghumpingnumerical simulationhigh-speed imagingTIG arc |
| spellingShingle | Boce Xue Baohua Chang Shenghua Wang Runshi Hou Peng Wen Dong Du Humping Formation and Suppression in High-Speed Laser Welding Materials high-speed laser welding humping numerical simulation high-speed imaging TIG arc |
| title | Humping Formation and Suppression in High-Speed Laser Welding |
| title_full | Humping Formation and Suppression in High-Speed Laser Welding |
| title_fullStr | Humping Formation and Suppression in High-Speed Laser Welding |
| title_full_unstemmed | Humping Formation and Suppression in High-Speed Laser Welding |
| title_short | Humping Formation and Suppression in High-Speed Laser Welding |
| title_sort | humping formation and suppression in high speed laser welding |
| topic | high-speed laser welding humping numerical simulation high-speed imaging TIG arc |
| url | https://www.mdpi.com/1996-1944/15/7/2420 |
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