Method, device, equipment and product for judging generation tendency of weld pores

Abstract

The invention provides a method, a device, equipment and a product for judging the generation tendency of weld pores. The method comprises the following steps: acquiring preset welding parameters in a welding process; the preset welding parameters are input into a molten pool mimicry model, air hole generation tendency values corresponding to the preset welding parameters are output, and the molten pool mimicry model is obtained based on molten pool mimicry sample training; when it is determined that the pore generation tendency value meets a preset pore generation threshold value, it is judged that the preset welding parameters meet the welding requirement; and if it is determined that the pore generation tendency value does not meet a preset pore generation threshold value, the preset welding parameters are discarded. According to the method, numerical simulation is conducted on the gas hole generation tendency in the fusion welding process, the welding process is reproduced in a computational fluid mechanics numerical simulation mode, a gas hole generation physical mechanism is fully considered, the cavitation potential model is established to judge the gas hole generation tendency, and then the welding technology is guided.

Description

technical field [0001] The invention relates to the field of welding technology, in particular to a method, device, equipment and product for discriminating the generation tendency of weld porosity. Background technique [0002] Pore ​​defects are one of the common defects in fusion welding, and there are two types of pores in the weld: "metallurgical type" and "technical type". In the current numerical simulation research on porosity, most of the research focuses on process-type porosity of high-energy beam welding such as lasers and electron beams. It is believed that process-type porosity is related to the instability of high-energy beam welding keyholes. Collapse, closed bubbles are formed in the molten pool, and some of the bubbles fail to escape the molten pool when the molten pool solidifies to form process-type pores. However, there is still a lack of research and evaluation on metallurgical pores. Contents of the invention [0003] The invention provides a metho...

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Problems solved by technology

[0003] The invention provides a method for discriminating the occurrence tendency of weld pores, which is used to solve the defects in the prior art that metallurgical pores have a great influence on the service performance of fusion welding joints, measurement and detection are difficult, and there is currently a lack of reliable and effective evaluation methods. Through the numerical simulation of the porosity tendency in the fusion welding process, the numerical simulation of computational fluid dynamics is used to reproduce the welding process, the physical mechanism of porosity is fully considered, and the cavitation potential model is established to determine the porosity tendency, and then the welding process is realized. guide

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