Please introduce the following in detail: Review of existing research on analyzing metal-transfer images in GMAW process
时间: 2023-03-02 09:54:37 浏览: 142
Gas Metal Arc Welding (GMAW) is a widely used welding process in which a consumable metal wire electrode is fed into a weld pool to join two or more metal parts together. During the welding process, the electrode melts and forms a molten metal pool, which then cools and solidifies to form a welded joint.
One way to analyze the GMAW process is to examine the metal-transfer images that are generated during welding. Metal-transfer images are high-speed photographs or videos of the GMAW process that capture the behavior of the molten metal as it is transferred from the electrode to the workpiece. Analyzing these images can provide insights into the physical processes that occur during welding, such as droplet detachment, droplet formation, and arc behavior.
There have been several studies that have analyzed metal-transfer images in the GMAW process. One such study was conducted by Liu et al. (2017), who used high-speed photography to capture metal-transfer images during GMAW of aluminum alloys. They found that the droplet detachment frequency was influenced by the welding current, and that there was a critical current level above which the droplet detachment frequency increased dramatically.
Another study by Liao et al. (2019) analyzed metal-transfer images during GMAW of high-strength steel. They found that the droplet transfer mode shifted from globular to spray transfer as the welding current increased, and that the formation of an unstable arc affected the droplet detachment process.
Other researchers have used image processing techniques to analyze metal-transfer images. For example, Zhang et al. (2019) developed an algorithm to automatically detect and track the movement of droplets in metal-transfer images during GMAW. They found that the droplet size and transfer frequency were affected by the welding current and the wire feed speed.
Overall, the analysis of metal-transfer images in the GMAW process is an active area of research that has the potential to improve our understanding of the physical processes that occur during welding. By studying metal-transfer images, researchers can gain insights into the factors that affect droplet detachment, droplet formation, and arc behavior, which can in turn help to optimize the welding process for different materials and applications.
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