A Deformation Digital Twin Optimization Method for Welding Manufacturing of Large Crane Box Girder

Abstract

The invention discloses a digital twin optimization method for welding manufacturing deformation of a large crane box girder, which combines actual welding deformation detection with finite element modeling and numerical calculation to realize digital management of welding components, effective control of welding deformation, and efficient formulation of optimization schemes. On the one hand, the measured data is used to improve the numerical model, on the other hand, the numerical model is used to reduce the test cost and realize the digital supervision of the manufacturing process, and then the existing database is used to guide the welding scheme and the database is continuously updated. In this way, the actual welding test can be reduced, the production and management efficiency can be improved, and the digital guidance basis can be provided for controlling the welding deformation of each process and optimizing the welding scheme.

Description

technical field [0001] The invention relates to a method for digital management, control and optimization of welding deformation of various processes in the automatic manufacturing of a large crane connecting beam, and more specifically, to a digital twin optimization method for welding and manufacturing deformation of a large crane box girder. Background technique [0002] The connecting beam of a large crane is a large-scale and complex steel structure composed of various forms of welded joints. Different manufacturing processes have different forms of welded joints, various deformation characteristics, and a large amount of data. It is difficult to manage welding deformation. It is difficult to grasp the law of welding deformation, and there are many manufacturing processes and certain deformation heredity, so it is difficult to control deformation. There are plenty of welding schemes to choose from, but the manufacturing cost is high, the steps are many, and the construc...

AI Technical Summary

Problems solved by technology

Not only more welding parts, welding positions, and sequence combinations are added to the welding of the box partition, but the vertical welding and horizontal welding methods used also have a new impact on the welding deformation, making the box deformation more difficult to control

Since there is an undertaking relationship between each manufacturing process, that is, the deformation of the butt joint of the panel affects the initial state of the corner joint of the plate unit, the welding of the plate unit affects the initial state of the welding of the box partition, and the deformation of each unit of the box affects the overall deformation of the final product. This further provides Welding Control Difficulty

[0005] Because of the large size of the box and the complexity of the manufacturing process, it is difficult to summarize its welding deformation law, and it is necessary to accumulate a large amount of test data to formulate a targeted optimization plan

However, considering the production cost, it is generally impossible to accumulate corresponding data through a large number of experiments, and can only be manufactured and summarized during the production process.

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