A Modeling Method of Laser Deep Penetration Welding Heat Source Model

Abstract

The invention discloses a modeling method of a laser deep penetration welding heat source model, which establishes a T-shaped joint entity model, considers the material properties of the weld area and the grid order division problem comprehensively when modeling, and builds the weld area into three bodies, Cover plate weld area, air film weld area, and core plate weld area; based on ANSYS, divide the grid sequentially, and divide the weld area first; establish a three-dimensional laser deep penetration welding heat source model, and solve the unit calorific value and heat source based on APDL The control equation of the model is: where x, y, z are Cartesian coordinates, QM is the peak value of the heat source, r1 is the effective radius r2 of the laser on the surface of the material, H1 is the shape parameter of the heat source, H0 is the height of the upper part of the heat source, and H is the actual welding seam. For penetration, heat value is solved according to the heat source model, and stored in an array. Based on ANSYS software, the calculated heat value is loaded to the corresponding unit of the finite element model, boundary conditions are set, and the solution is calculated to complete the modeling process.

Description

technical field [0001] The invention belongs to the technical field of laser welding, in particular to a modeling method for a heat source model of deep penetration welding in laser welding. Background technique [0002] Laser welding has the advantages of energy concentration, large aspect ratio, small heat-affected zone, small deformation, strong adaptability, and high welding quality. Therefore, it is widely used in the industrial field, especially in the lightweight process of automobiles, ships, and aerospace, and has irreplaceable advantages. Laser welding can obtain a large depth-to-width ratio, so that deep penetration welding of T-joints can be realized. Laser welding involves multi-variable and multi-coupling phenomena such as the interaction between laser and material, pinhole effect, plasma effect, material thermophysical properties, heat transfer and mass transfer of welding pool, and systematic experimental research is time-consuming and laborious. In reality...

AI Technical Summary

Problems solved by technology

Laser welding involves multi-variable and multi-coupling phenomena such as the interaction between the laser and the material, the pinhole effect, the plasma effect, the thermophysical properties of the material, the heat transfer and mass transfer of the welding pool, and the systematic experimental research is time-consuming and laborious.

In reality, due to the local heating of the laser, the laser interacts with the material in and around the molten pool, and the data cannot be measured

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