Multi-pass welding angle distortion prediction for QTT antenna track considering the bending moment of gravity

XU Qian; HU Guangxu; DONG Zhibo; XU Hongxiang; FANG Hongyuan

doi:10.12073/j.hjxb.20200316002

TRANSACTIONS OF THE CHINA WELDING INSTITUTION > 2020 > 41(8): 10-13. > DOI: 10.12073/j.hjxb.20200316002

XU Qian, HU Guangxu, DONG Zhibo, XU Hongxiang, FANG Hongyuan. Multi-pass welding angle distortion prediction for QTT antenna track considering the bending moment of gravity[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2020, 41(8): 10-13. DOI: 10.12073/j.hjxb.20200316002

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Multi-pass welding angle distortion prediction for QTT antenna track considering the bending moment of gravity

1.
Xinjiang Astronomical Observation, Chinese Academy of Sciences, Urumqi, 830001, China
2.
Key Laboratory of Radio Astronomy, Chinese Academy of Sciences, Urumqi, 830011, China
3.
Harbin University of Commerce, Harbin, 150028, China
4.
State Key Laboratory of Advancd Welding and Joining, Harbin Institute of Technology, Harbin, 150001, China

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Received Date: March 15, 2020
Available Online: November 11, 2020

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Abstract

Abstract

Each block for assembling QTT antenna track is about 4 000 mm × 600 mm × 200 mm. To fabricate the track with multi-pass welding technology, it needs large groove dimension and a great amount of deposited metals, resulting large welding angle distortions. To validly predict and control the deformation, a thermal-elastic-plastic finite element model was used to simulating a scaling experiment plate considering gravity boundary condition at first. Then, another welding simulation for the actual track block structure was computed to compare with the modified formula for the welding angle distortion adding the bending moment of Gravity. The result shows that the effecting of gravity for QTT multi-pass welding was ineligible, which make the formula more accuracy.
- QTT antenna track,
- thick plate,
- multi-pass welding,
- welding angle distortion

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