Method for performing simulated calculation on temperature field in laser processing and welding process based on COMSOL temperature model

A model simulation and laser processing technology, applied in the direction of calculation, design optimization/simulation, special data processing applications, etc., can solve the problems of difficult operation, high cost, large temperature gradient, etc., to achieve simple and convenient operation, reduce experimental time and cost effect

Inactive Publication Date: 2017-10-27
WUHAN BO UNION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, laser welding is a fast and uneven thermal cycle process. The temperature gradient is large during the heating or cooling process near the weld. It is too expensive to determine the process parameters and temperature field of laser welding through experiments, and the operation is difficult. The process is complicated, so it is of great practical significance to accurately understand the distribution law of the laser welding temperature field and guide practice from theory to control welding quality and performance

Method used

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  • Method for performing simulated calculation on temperature field in laser processing and welding process based on COMSOL temperature model
  • Method for performing simulated calculation on temperature field in laser processing and welding process based on COMSOL temperature model
  • Method for performing simulated calculation on temperature field in laser processing and welding process based on COMSOL temperature model

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Effect test

Embodiment 1

[0030] A method for simulating and calculating the temperature field in the laser welding process based on COMSOL, comprising the following steps:

[0031] (1) Establishment of heat source model:

[0032] Enter the main interface of the software, select "Model Wizard", create a new three-dimensional laser heating physical field model, and select "Research" as transient. Add function in "Definition", define Gaussian pulse function and waveform, so as to establish a moving Gaussian circular heat source model. Set the laser power to 3 kW, the spot radius to 2.5 mm, and the laser action period to 0.1 s.

[0033] (2) Model establishment:

[0034] Set the size of the model to 20 mm×20 mm×1 mm (geometry 1) and 20 mm×20 mm×3 mm (geometry 2), and adjust the angular position of the geometry so that the two form a close connection up and down.

[0035] (3) Initial and boundary conditions:

[0036] When the laser is directly irradiated, the entire geometric model is thermally insulate...

Embodiment 2

[0045] A method for simulating and calculating the temperature field in the laser welding process based on COMSOL, comprising the following steps:

[0046] (1) Establishment of heat source model:

[0047] Enter the main interface of the software, select "Model Wizard", create a new three-dimensional laser heating physical field model, and select "Research" as transient. Add function in "Definition", define Gaussian pulse function and waveform, so as to establish a moving Gaussian circular heat source model. Set the laser power to 3 kW, the spot radius to 2.5 mm, and the laser action period to 0.1 s.

[0048] (2) Model establishment:

[0049] Set the size of the model to 20 mm×20 mm×1 mm (geometry 1) and 20 mm×20 mm×3 mm (geometry 2), and adjust the angular position of the geometry so that the two form a close connection up and down.

[0050] (3) Initial and boundary conditions:

[0051] When the laser is directly irradiated, the entire geometric model is thermally insulate...

Embodiment 3

[0060] A method for simulating and calculating the temperature field in the laser welding process based on COMSOL, comprising the following steps:

[0061] (1) Establishment of heat source model:

[0062] Enter the main interface of the software, select "Model Wizard", create a new three-dimensional laser heating physical field model, and select "Research" as transient. Add function in "Definition", define Gaussian pulse function and waveform, so as to establish a moving Gaussian circular heat source model. Set the laser power to 1 kW, the spot radius to 2.5 mm, and the laser action period to 0.1 s.

[0063] (2) Model establishment:

[0064] Set the size of the model to 20 mm×20 mm×1 mm (geometry 1) and 20 mm×20 mm×3 mm (geometry 2), and adjust the angular position of the geometry so that the two form a close connection up and down.

[0065] (3) Initial and boundary conditions:

[0066] When the laser is directly irradiated, the entire geometric model is thermally insulate...

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Abstract

The invention belongs to the field of laser processing and welding and particularly relates to a universal method for performing simulated calculation on a temperature field in a laser processing and welding process based on a COMSOL temperature model. The method is characterized by comprising the steps that (1) COMSOL software is used to establish a transient temperature field model; (2) a laser light source is introduced; (3) a geometric physical model of a processed material is established, and relevant physical and chemical properties are given to the model; (4) initial and boundary heat source conditions of the model are set; and (5) meshing and calculation are performed. According to the method, a self-defined Gaussian heat source model is loaded into the COMSOL finite element software, the COMSOL software is utilized to perform numerical simulation on distribution of the laser welding temperature field of a polymer / metal material to obtain a welding temperature field pattern, temperature at all points of a weldment is predicted, operation is easy and convenient, experiment time is greatly shortened, experiment cost is greatly reduced, and theoretical guidance and technical support are provided for accurately understanding the distribution law of the laser welding temperature field of the polymer / metal material and controlling welding quality and usability.

Description

technical field [0001] The invention belongs to the field of laser welding and processing, and in particular relates to a method for simulating and calculating a temperature field during laser processing and welding based on a COMSOL temperature model. Background technique [0002] With the continuous advancement of science and technology, it also promotes the progress of the material industry, and the requirements for materials are becoming more and more refined, lightweight and multi-functional. Combining two or more different materials has become one of the development trends of new materials. The composite effect produced is very attractive. How to combine materials and give full play to their respective advantages has been discussed subject. [0003] The use of laser for non-contact welding has become one of the most favorable solutions, which can greatly reduce the heat-affected zone of the workpiece; can achieve precise positioning welding; realize welding at complex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/23G06F30/367
Inventor 刘曰利洪习何程娜陈韬
Owner WUHAN BO UNION TECH CO LTD
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