Research on High Power Electron Beam Gun for Fuse Additive Manufacturing

SANG Xinghua; XU Haiying; YANG Bo; PENG Yong

doi:10.7512/j.issn.1001-2303.2024.01.07

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Research on High Power Electron Beam Gun for Fuse Additive Manufacturing
Vol. 54, Issue 1, Pages: 35-43(2024)
DOI： 10.7512/j.issn.1001-2303.2024.01.07

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桑兴华，许海鹰，杨波，等.电子束熔丝增材制造大功率电子枪研制［J］.电焊机，2024，54（1）：35-43.

SANG Xinghua, XU Haiying, YANG Bo, et al.Research on High Power Electron Beam Gun for Fuse Additive Manufacturing[J].Electric Welding Machine, 2024, 54(1): 35-43.
桑兴华，许海鹰，杨波，等.电子束熔丝增材制造大功率电子枪研制［J］.电焊机，2024，54（1）：35-43. DOI： 10.7512/j.issn.1001-2303.2024.01.07.

SANG Xinghua, XU Haiying, YANG Bo, et al.Research on High Power Electron Beam Gun for Fuse Additive Manufacturing[J].Electric Welding Machine, 2024, 54(1): 35-43. DOI： 10.7512/j.issn.1001-2303.2024.01.07.

摘要

根据电子束熔丝增材制造需求，结合理论计算，利用三维造型软件设计了电子枪结构包括阴极组件、栅极、阳极、聚焦线圈、扫描线圈；利用模拟仿真软件对电子枪结构进行优化，最终得到优化后的电子枪栅极球面直径14 mm、阳极孔径3.5 mm、阳极倾角140°、阴阳极距离10 mm、聚焦线圈匝数1 800匝、磁轭间隙30 mm、线圈内径60 mm、外径150 mm；设计了电子枪聚焦及偏转扫描驱动电路，带载测试聚焦电流最大值可达1.49 A，偏转扫描最大电流可达±1.06 A，扫描频率达2 kHz；对电子枪性能进行测试，最高耐压达到-75 kV，功率达到30 kW，TC4的熔丝增材成形效率达到5.16 kg/h。研制的电子枪结构轻便、束流品质好、成形效率高，适合于用作真空室内动枪。

Abstract

In this paper, according to the requirements of electron beam fuse additive manufacturing, combined with theoretical calculation, the structure of the gun is designed by using three-dimensional modeling software, including filament assembly, grid, anode, focusing coil and scanning coil. The simulation software is used to optimize the electron optical system of the electron gun. The results show that the diameter of the grid sphere is 14 mm, the diameter of the anode is 3.5 mm, the inclination angle of the anode is 140°, the distance between the anode and the cathode is 10 mm, the number of turns of the focusing coil is 1 800, the gap between the yoke is 30 mm, the inner diameter of the coil is 60 mm, and the outer diameter is 150 mm. The driving circuit of focusing and deflection scanning of electron gun is designed. The maximum current of focusing and deflection scanning can reach 1.49 A and ± 1.06 A respectively. When the scanning frequency is 2 kHz, the current in the coil can change rapidly. The performance of the electron gun is tested. The maximum withstand voltage reaches -75 kV, the power reaches 30 kW, and the fuse forming efficiency of TC4 reaches 5.16 kg/h. The electron gun developed in this paper has light structure and is suitable for moving gun in vacuum chamber. It also has good beam quality and high forming efficiency, which provides technical reserves for fuse forming of large metal structural parts

关键词

电子束增材制造模拟仿真大功率电子枪成形效率

Keywords

electron beamadditive manufacturingsimulationhighpower EB-gunforming efficiency

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