Two-dimensional axisymmetric simulation model suitable for electromagnetic forming of pipe fitting with magnetic collector and modeling method

Abstract

The invention discloses a two-dimensional axisymmetric simulation model suitable for electromagnetic forming of a pipe fitting with a magnetic collector and a modeling method. The two-dimensional axisymmetric simulation model adopts three conductor rings, namely a conductor ring close to one side of a driving coil, a conductor ring close to one side of a to-be-machined workpiece and an intermediate conductor ring, to replace the magnetic collector. The conductor ring close to one side of the driving coil and the conductor ring close to one side of the workpiece to be processed are set as magnetic materials of the magnetic collector, and the middle conductor ring is set as an ideal insulating material; and the total current in the conductor ring close to one side of the driving coil and thetotal current in the conductor ring close to one side of the workpiece to be machined are equal in size and opposite in direction. According to the two-dimensional axisymmetric simulation model suitable for electromagnetic forming of the pipe fitting with the magnetic collector and the modeling method, compared with an existing three-dimensional model, the simulation model and the modeling methodhave the advantages that the calculation speed is higher. Compared with an existing two-dimensional axisymmetric model, the simulation model and method provided by the invention are more suitable forphysical reality, and the calculation precision is higher.

Description

technical field [0001] The invention belongs to the technical field of metal material processing, in particular to a two-dimensional axisymmetric simulation model and a modeling method suitable for electromagnetic forming of a pipe fitting with a magnet collector. Background technique [0002] As a green and flexible high-speed forming technology, electromagnetic forming technology perfectly meets the needs of the times and has significant advantages. In the electromagnetic forming process, when the resistivity of the workpiece to be processed is too high, the electromagnetic forming technology with a magnet collector is usually used; that is, a magnet collector is added between the driving coil and the workpiece to be processed to achieve the purpose of enhancing the electromagnetic force of the workpiece to be processed. At this time, because the model does not have axial symmetry, it is very difficult to simulate this process. [0003] The Chinese patent "A new type of m...

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Problems solved by technology

[0003] The Chinese patent "A Novel Magnet Concentrator for Electromagnetic Pulse Welding (CN 105965184B)" discloses a new magnetic concentrator structure with cooling channels, good heat dissipation performance, and long service life of the magnetic concentrator and coil; however, the patent does not involve how to simulate it

The magnetic collector is a ring-shaped conductor with a small gap. Because it does not have axial symmetry as a whole, the current simulation calculation of electromagnetic forming with a magnetic collector can only use a three-dimensional model; when building a three-dimensional model, because there is a small gap in the magnetic collector, resulting in It is extremely difficult to divide the grid, the calculation is very difficult, and the calculation accuracy cannot be guaranteed

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