Method for improving welding deviation of electron beam welding

Abstract

The invention discloses a method for improving welding deviation of electron beam welding. The method comprises the steps that main welding parameters of welding equipment are obtained; main parameters of a main electron beam welding model are obtained; the distance of electrons deviating from a weld joint through a magnetic field generated by a magnetized welding part is obtained, and experiment preparation is carried out; reasonable assuming is carried out, conditions are simplified, size and direction components of the magnetic field generated by the magnetized welding part are obtained, and constraint equation derivation is carried out; a welding model is established by using CST software, main welding parameters are set, and grid division is carried out; electric and magnetic field loading is carried out on the model, a post-processing result is checked, and the number of turns and a bidirectional current are set through a deflection coil to carry out simulation for improving a focus point; and the deflection coil is manufactured, and actual welding work is conducted according to simulation parameters. According to the method for improving welding deviation of electron beam welding, the offset of electron beams is effectively improved, and the defects that the surface performance of a material is influenced by high temperature generated by a traditional demagnetization method, the demagnetization effect on a large and thick plate is not obvious, the experiment cost is relatively high, and professional experienced personnel are needed for operation are avoided.

Description

technical field [0001] The invention relates to the technical field of electron beam welding, in particular to a method for improving welding deviation of electron beam welding. Background technique [0002] Electron beam welding technology relies on high-energy electron beams as a heat source to melt the welding material, thereby producing a unique welding layer on the surface of the parts, so as to achieve the bonding of the welded metals together. Electron beam welding plays a unique role in important fields such as aerospace, nuclear industry, and ocean engineering because of its advantages of concentrated energy, good thermophysical properties of welds, and high purity of welds. [0003] Large and thick sheet metal parts are easily magnetized in a magnetic field, and the trajectory of electrons will deviate under the condition of magnetization of the weldment. Welding deviation will not only cause weld misalignment, pores, undercuts, collapse, cracks and other phenomena...

AI Technical Summary

Problems solved by technology

[0003] Large and thick sheet metal parts are easily magnetized in a magnetic field, and the trajectory of electrons will deviate under the condition of magnetization of the weldment. Welding deviation will not only cause weld misalignment, pores, undercuts, collapse, cracks and other phenomena, In severe cases, it will cause welding defects such as lack of fusion

Demagnetizing large and thick parts is not only technically complicated but also expensive

And it will damage the welded metal surface material

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