Simulation method for dynamic simulation of intermediate frequency heat treatment process of longitudinal seam welded pipe

Abstract

The invention discloses a method for dynamically simulating intermediate-frequency heat treatment process of longitudinal welded pipes. According to the method, the movement of welded pipes in practical production is replaced by the movement of induction coils, an ANSYS APDL language-based macro document library, and the macro document library comprises a control library, a parameter library, an environment library and a computation library, wherein the control library is used for controlling the execution sequences of macro documents in the parameter library; the parameter library comprises modeling parameters and load parameters when the coils are at different positions; the environment library is used for establishing geometric models, meshing, load application and solving types required by two physical environments: electromagnetic analysis and heat analysis; and the computation library is used for carrying out electromagnetic-thermal coupling computation on the induction heating process by adopting DO circulation and storing the solving result into a database. Compared with the prior art, the method is capable of dynamically simulating the intermediate-frequency heat treatment process of the longitudinal welded pipes, and the simulation is closer to the reality; through modifying the parameters, various production processes of the factories can be simulated; and the whole simulation process takes ANSYS software as a platform, so that the operation is automatic, the operation is simple and the factory technicians can grasp and use the method conveniently.

Description

technical field [0001] The invention belongs to the field of induction heat treatment research and relates to a simulation method for dynamic simulation of the intermediate frequency heat treatment process of straight seam welded pipes. Background technique [0002] Induction heat treatment technology uses the thermal effect of induction eddy current to heat the workpiece to the required temperature in a short time. Due to its advantages of energy saving, rapid heating and partial quenching of workpieces, this technology is widely used in industrial fields such as metallurgical machinery, oil drilling rigs and automobile manufacturing. The metallurgical quality and service performance of welded steel pipes depend on three factors: the metallurgical quality of the pipe body steel, the technology of pipe welding and the heat treatment of the weld seam. With the wide application of high-strength and high-toughness welded pipes, the metallurgical quality requirements for welds ...

AI Technical Summary

Problems solved by technology

However, there is no relative movement between the induction coil and the welded pipe in the whole simulation process, and the heat conduction in the axial direction of the weld is not fully considered, so this simulation method has certain errors

The second simulation method simplifies the coupling process of electromagnetic field and temperature field, and it will bring great errors when using this method when the material permeability or conductance changes greatly with temperature

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