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Automatic detection and storage method for welding droplet data based on Fluent UDF

A technology of automatic detection and storage method, applied in the field of analog computing, to achieve the effect of improving welding heat input, reducing spatter rate and improving labor productivity

Active Publication Date: 2021-08-24
FUZHOU UNIV
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Problems solved by technology

[0003] In view of this, the object of the present invention is to provide a method for automatic detection and storage of welding droplet data based on Fluent UDF, which solves the limitation of droplet data detection and storage in the multiphase flow VOF model of numerical simulation calculation of welding droplet transition

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  • Automatic detection and storage method for welding droplet data based on Fluent UDF
  • Automatic detection and storage method for welding droplet data based on Fluent UDF
  • Automatic detection and storage method for welding droplet data based on Fluent UDF

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Embodiment Construction

[0070] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0071] In this embodiment, the schematic diagram of the numerical model of molten inert gas shielded welding droplet transition is as follows Figure 4 As shown, the automatic detection and storage method of welding droplet data based on Fluent UDF is used to study the influence law and mechanism of welding parameters on each parameter of droplet. The welding parameters are shown in Table 1.

[0072] Table 1 welding parameters

[0073]

[0074] The model adopts a two-dimensional axisymmetric model, the shielding gas is pure argon, the welding wire is 304 stainless steel wire, the diameter of the welding wire is 1.2mm, AF is the symmetrical axis, the welding wire is fed from AB, CD is the shielding gas inlet, and DE and EF are the outlets. The first phase is set to argon, the second phase is set to molten steel, the fluid flow model is laminar flow,...

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Abstract

The invention relates to an automatic detection and storage method for welding droplet data based on Fluent UDF, and the method comprises the following steps: S1, building a droplet transition geometric model, and dividing a grid; S2, importing Fluent software, checking whether the grid volume has an error or not, and checking the grid proportion and quality; S3, adopting a multiphase flow VOF model as a simulation model; s4, acquiring material parameters of a gas phase and a liquid phase, and presetting boundary conditions; s5, based on a PISO solver, obtaining a control equation of each physical field; s6, according to program parameters such as the operation cycle and the detection precision of the droplet data automatic detection storage program, mounting the droplet data automatic detection storage program; s7, initializing the model, then starting calculation, and carrying out automatic detection and storage of molten drop data by utilizing a droplet data automatic detection and storage UDF (User Defined Function) program; and S8, finishing the calculation and carrying out convergence, and exporting all droplet data by using a DEFINE_ON_DEMAND macro function pre-packaged by software. According to the invention, droplet data can be effectively and accurately detected.

Description

technical field [0001] The invention relates to the technical field of analog computing, in particular to a method for automatic detection and storage of welding droplet data based on Fluent UDF. Background technique [0002] When conducting research on the welding droplet transfer process, more and more scholars choose to use Numerical simulation method to study welding droplet transfer process. However, the mainstream fluid calculation software Fluent in the numerical simulation of welding droplet transfer has two problems when using the multiphase flow VOF model for numerical simulation calculation of welding droplet transfer. First, it is impossible to directly detect and identify the fluid volume function in the calculation domain. The droplet area in the grid area greater than the critical value, because the system can only judge whether the grid is filled with liquid metal fluid according to the fluid volume function, and track the free surface of the liquid metal fl...

Claims

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Application Information

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IPC IPC(8): G06F30/28G06F30/17G06F111/10G06F113/08G06F119/14G06F119/08
CPCG06F30/28G06F30/17G06F2111/10G06F2113/08G06F2119/14G06F2119/08
Inventor 顾天奇黄泽涵林宏鑫高翔
Owner FUZHOU UNIV
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