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What causes deformation during plate welding and how to solve it
2024.04.03
Deformation during the welding process of sheet metal is a common issue that may lead to quality problems such as inaccurate product dimensions and shape distortion. This article will elaborate on the causes of deformation during sheet metal welding and propose corresponding solutions to help readers better address this issue.
Causes of Deformation:
a. Welding Thermal Stress: During the welding process, the welding area is subjected to heat, resulting in temperature gradients and thermal stress, leading to deformation of the sheet metal.
b. Insufficient Plate Stiffness: Some sheet metals have low stiffness, making them prone to bending or warping during the welding process, resulting in deformation.
c. Unbalanced Welding: Non-uniform heating of the weld seam during welding causes localized deformation of the sheet metal.
Solutions:
a. Use Proper Welding Sequences: Adopting appropriate welding sequences during the sheet metal welding process can mitigate the impact of welding thermal stress on the sheet metal and reduce deformation.
b. Employ Preheating and Control Welding Temperature: For materials with low plate stiffness, preheating can be used to raise the plate temperature, reducing thermal deformation during welding. Additionally, controlling welding temperature and speed helps prevent overheating of the sheet metal, which can cause deformation.
c. Implement Compensation Welding: For large-sized sheet metal, compensation welding can be used to offset deformation during welding by setting compensation weld seams on the sheet metal.
d. Use Auxiliary Fixtures and Supports: During the welding process, using auxiliary fixtures and supports can secure the sheet metal and reduce the occurrence of deformation.
Conclusion:
Deformation is a common issue during the welding process of sheet metal, which may affect the quality and dimensional accuracy of the product. To minimize deformation, a series of effective measures should be taken, such as using proper welding sequences, preheating and controlling welding temperature, employing compensation welding, and using auxiliary fixtures. These methods ensure the quality and dimensional accuracy of the welded products.