Development of Gas Discharge Electron Beam Source of Electron Beam Coaxial Wire and Fuse Additive Manufacturing Applicability

doi:10.3901/JME.2022.07.276

Abstract

Abstract: In order to improve the quality and efficiency of electron beam fuse additive manufacturing, the key technology of gas discharge electron beam source of electron beam coaxial wire has been studied. Based on the analysis of the generation mechanism of the gas discharge electron beam, the structure characteristics of the gas discharge electron beam gun of beam coaxial wire are studied. The inverter power supply for electron beam coaxial wire electron beam gun is developed by adopting three-stage AC-DC topology, inner loop and outer loop closed-loop control circuit of the accelerating power supply, and the beam closed-loop control circuit based on the gas flow regulation. Based on the above technical achievements, the electron beam fuse additive manufacturing equipment of electron beam coaxial wire is developed. The electron beam morphology characteristics, inverter power supply output characteristics and fuse forming process of the gas discharge electron beam source of electron beam coaxial wire are tested and analyzed. The results show that the microstructure of the sample prepared by the technology of electron beam coaxial wire is obviously improved compared with the hot cathode electron beam fuse forming technology, and it has necessary technical reserve for large-scale fuse additive manufacturing.

Key words: electron beam, fuse additive manufacturing, electron beam coaxial wire, electon beam gun, inverter power supply

CLC Number:

XU Haiying, WANG Zhuang, PENG Yong, YANG Guang, SANG Xinghua, YANG Bo. Development of Gas Discharge Electron Beam Source of Electron Beam Coaxial Wire and Fuse Additive Manufacturing Applicability[J]. Journal of Mechanical Engineering, 2022, 58(7): 276-283.

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