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Annular nugget resistance spot welding numerical simulation method

A resistance spot welding and numerical simulation technology, applied in 3D modeling, image data processing, special data processing applications, etc., can solve the problems of contact surface microscopic model and unreasonable contact resistance, avoid a large number of repeated experiments, reduce Errors, effects of reliable technical means

Active Publication Date: 2021-02-05
JILIN UNIV
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  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a numerical simulation method for annular nugget resistance spot welding, which solves the technical problems of unreasonable contact surface micromodel and contact resistance existing in the prior art

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  • Annular nugget resistance spot welding numerical simulation method
  • Annular nugget resistance spot welding numerical simulation method
  • Annular nugget resistance spot welding numerical simulation method

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Embodiment Construction

[0040] The detailed content of the present invention and its specific implementation will be further described below in conjunction with the accompanying drawings.

[0041] The implementation process includes establishing geometric models, assigning material properties, component assembly, setting analysis steps, setting contact properties, specifying boundary conditions and loads, dividing meshes, submitting job solutions and post-processing steps. Figure 1 It is the operation logic of the above numerical simulation. In the pre-pressurization and pressurization stages, the CAE model only performs structural simulation to calculate the initial contact area. Then, in the electrification stage, the initial contact area is the first conduction position between the electrode part and the workpiece part, and becomes the heat source. - The initial environment of electrical-structural three-phase coupling calculation. At this stage, the contact pressure, current density, node tempera...

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Abstract

The invention relates to an annular nugget resistance spot welding numerical simulation method, and belongs to the technical field of welding numerical simulation. According to the actual electrode and workpiece sizes of the annular nugget resistance spot welding process, a CAE model is established in a three-dimensional space by using a solid grid, welding parameters are converted into loads andboundary conditions, an interface is converted into contact attributes, a reliable basis is provided for predicting the nugget size and shape of the annular nugget resistance spot welding process, therefore, reasonable specifications are made for parameters such as the electrode size, the workpiece plate thickness, the welding current, the welding pressure and the welding time in the annular nugget resistance spot welding process. The method has the advantages that a large number of repeated experiments are avoided, errors possibly generated by manual experiments are reduced, the welding stateof the workpiece at different moments can be visually displayed, and a reliable technical means is provided for deeply researching the spot welding mechanism of the annular nugget resistance.

Description

technical field [0001] The present invention relates to the technical field of welding numerical simulation, in particular to a numerical simulation method for ring-shaped nugget resistance spot welding, which is a three-dimensional modeling of a non-conductive electrode with a film insulation core and forming a ring for the electrode during resistance spot welding. Numerical simulation method of shaped nugget. Background technique [0002] The stainless steel car body of rail cars has the characteristics of long service life, simple process and easy repair, so it gradually replaces the ordinary carbon steel car body and shows broad development prospects. The stainless steel car body is composed of underframe, side wall, roof and end wall, and its main form is fully welded steel and beam-slab structure. The resistance spot welding process is a process in which the workpieces are brought into close contact by electrode pressure, and then an electric current is applied to use...

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Application Information

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IPC IPC(8): G06F30/23G06T17/20
CPCG06F30/23G06T17/20
Inventor 徐国成谢俊林董娟谷晓鹏陶维承
Owner JILIN UNIV
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