Automatic electron beam alignment adjustment system and automatic filament current adjustment system for electron beam welder

Abstract

Recently, the electron beam welders with high acceleration voltage (more than 100 kV) and high electrical power (more than 15 kW) have been reviewed the role of the high-energy electron beam density again, due to space or aircraft development or automobile industry desired high productivity and high accurate welding for saving energy. NEC group have supplied these electron beam welders. This time, the automatic alignment adjustment system of the electron beam orbit and the automatic adjustment system of filament current were developed and put to a practical use. As a result, the great effectiveness for the stability of welding quality was apparent.

Keywords:

• electron beam welder
• electron beam gun
• electron beam alignment
• filament current adjustment
• CCD

Acknowledgements

We would like to express our appreciation and gratitude for the great amount of advice and cooperation on the development of the image processing system, software design, system evaluation, and welding evaluation we received during this study from the staff of the Mechanical Control Systems Department of NEC and of the EBW Department of Kowa Electric Industry Co. Ltd.

Notes

*Presented at the EB Processing Conference in December 2008.