北京航空航天大学学报 ›› 2011, Vol. 37 ›› Issue (8): 1044-1048.

• 论文 • 上一篇    

高压脉冲电子束的控制及其对焊缝形貌影响

许海鹰, 余伟, 左从进   

  1. 北京航空制造工程研究所 高能束流加工技术重点实验室, 北京 100024
  • 收稿日期:2010-03-23 出版日期:2011-08-30 发布日期:2011-09-03
  • 作者简介:许海鹰(1973-),男,山西临猗人,工程师,xhyxhy@126.com.

High voltage pulse electron beam control strategy and influence on weld bead shape

Xu Haiying, Yu Wei, Zuo Congjin   

  1. Science and Technology on Power Beam Processes Laboratory, Beijing Aeronautical Manufacturing Research Institute, Beijing 100024, China
  • Received:2010-03-23 Online:2011-08-30 Published:2011-09-03

摘要: 研制出一台150 kV/30 kW高压脉冲电子束焊机,介绍了控制脉冲束流产生的偏压脉冲电源拓扑电路结构及脉冲束流频率、占空比、束流基值、束流峰值的调节控制技术.在0~1 kHz频率范围内,该电源可输出最大幅值200 mA的脉冲电子束束流,且工艺参数调节方便.分别采用脉冲束流与连续束流电子束工艺焊接了1Cr18Ni9Ti奥氏体不锈钢,对不同工艺的焊缝形貌进行了对比分析.与连续束流电子束焊接工艺相比,采用脉冲电子束焊接工艺的焊缝熔深增加,深宽比增大;对于脉冲电子束焊接工艺,占空比给定时,随着束流频率增加,焊接缺陷减少.试验结果表明:脉冲束流频率、占空比是影响焊缝成形的关键工艺参数;脉冲调制方式控制偏压是获得高压脉冲电子束的理想控制技术之一.

Abstract: A 150 kV/30 kW high voltage pulse electron beam welding power source was developed. The bias pulse power source topology and control technique about base beam current, peak beam current, pulse beam duty, pulse beam frequency were introduced. Not only the biggest peak beam current up to 200 mA has been exported by this power source at 0-1 kHz, but also weld technology parameters are expediently adjusted. The 1Cr18Ni9Ti stainless steel work pieces had been welded by electron beam welding and pulse electron beam welding. These weld bead shapes had been studied and analyzed. In contrast with electron beam welding, weld penetration will be increased by pulse electron beam welding introduced. At the immovable pulse beam duty, the weld faults will be reduced with the pulse beam frequency being increased. Through these weld tests, besides beam frequency and duty are substantiated key technique parameters for weld shapes, it also shows that pulse modulated bias power source technique is an applicable technology to achieve high voltage pulse electron beam.

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