A new control method of the joint position at the working current at electron beam welding

Druzhinina, Anastasia A.; Laptenok, V D; Murygin, A. V.; Petrenko, V. E.

doi:10.1080/09507116.2022.2033443

Cited by 1 publication

(1 citation statement)

References 3 publications

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“…The augmentation of controlling operations is related, for example, to the strict alignment and positioning requirement of the electron beam in relation to the location of the joint/groove to be welded. In references [25][26][27][28][29][30][31][32], it can be found various alternatives introduced in detail for systems where the focal position of the electron beam in relation to the workpiece and the joint to be welded can be controlled in real time. The information for the control system needed for control and adjustment during the welding process is obtained by using suitable sensors that are able to collect, for example, the secondary current in plasma from the weld plume, the intensity of backscattered electrons/X-rays from the welding direction.…”

Section: Recommended For Publication By Commission IV -Power Beam Pro...mentioning

confidence: 99%

Controlling root penetration in electron beam welding by a through-current feedback

Karhu

Kujanpää

2022

Weld World

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Electron beam (EB) welding is a keyhole welding process in which the kinetic energy of focused electrons is converted into the heat required for welding. When a full penetration weld is achieved in keyhole EB welding, a small part of the electrons from the electron beam pass through the workpiece via the open keyhole at the root side of the weld. These electrons provide a charge whose current value can be measured, namely, the through-current. The aim of this study was to develop and build a control system integrated in the EB welding machine that enables the maintenance of complete root penetration in EB welding by means of an adaptive control system. The adaptation was performed with closed-loop feedback equipment that simultaneously measures the electrons passing through the workpiece via the keyhole (transmitted through-current) and adjusts the required beam current parameter relative to the through-current measured during welding. The results of the welding tests demonstrated the functionality of the developed control system and the suitability of the concept itself. For example, in a welding test run in which the thickness of the test piece was linearly increased from 10 to 12 mm, the control system was able to react and regulate the welding power required for complete root penetration along the whole thickness range. In the above case, the test results showed that based on the measured through-current data, the control system instantaneously increased the amount of beam current required during welding linearly with increasing thickness of the plate to be welded.

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Section: Recommended For Publication By Commission IV -Power Beam Pro...mentioning

confidence: 99%

Controlling root penetration in electron beam welding by a through-current feedback

Karhu

Kujanpää

2022

Weld World

View full text Add to dashboard Cite

show abstract

A new control method of the joint position at the working current at electron beam welding

Cited by 1 publication

References 3 publications

Controlling root penetration in electron beam welding by a through-current feedback

Controlling root penetration in electron beam welding by a through-current feedback

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