Automatic Joint Guidance and Beam Focusing Device for electron-beam welding
Автор: Braverman V.Ya., Bogdanov V.V., Platonov O.A.
Журнал: Siberian Aerospace Journal @vestnik-sibsau-en
Рубрика: Technological processes and material science
Статья в выпуске: 3 vol.22, 2021 года.
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Physical, technological and power characteristics of the Electron Beam Welding (EBW) support its application in those circumstances that require greater focus on features and quality of the welding joints and improved weight and robustness aspects for individual joints of an object and products as a whole. At the same time, those characteristics of the EBW establish it as a complicated process that results from multiple factors interacting with one another. The quality of a welding joint depends on the precision of the beam alignment with the joint plane and the positioning of the minimum section (focus) of the electron beam in the penetration channel. These factors have a significant impact on the welding depth, the shape of the seam and presence of defects in it. The challenge of providing precise positioning of the beam along the joint of the welded parts is especially critical during the welding of long joints of large construction parts. This level of precision requires reliance on equipment for automatic beam alignment with the seam. Dispersion and re-reflection of the electrons in the beam leads to the loss of focus for the beam at a stable current of the focusing system. To obtain the data for the beam’s position at the seam and the position of the beam’s focus at the welding surface, we use phenomena closely associated with the EBW, such as the secondary electron emission and the X-ray radiation in the welding area. We are presenting a functional diagram of a device for the automatic positioning and focusing of the electron beam.
Electron beam welding, secondary electron emission, X-rays, the deflection of the beam from the joint, defocusing, the frequency selection of the sensor’s signal
Короткий адрес: https://sciup.org/148329584
IDR: 148329584 | DOI: 10.31772/2712-8970-2021-22-3-517-525
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