Nonvacuum electron beam cutting and welding—two partnering processes for fast and highly efficient metal working

Hassel, Thomas; Murray, N.; Konya, R.; Beniyash, A.; Bach, Fr.‐W.

doi:10.1007/s40194-013-0032-8

Cited by 3 publications

(4 citation statements)

References 1 publication

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“…It is important to remark that this method requires no change to the beam generator or pressure stage system of the original NVEB welder. This means that the machine can be immediately used for both processes-cutting and welding [7]. This claim will be supported further down within this publication for a chosen example from industrial practice.…”

Section: Thermal Cuttingmentioning

confidence: 71%

“…This is usually realized by a gas jet that is concentric to an energy source; for other variations it can be either trailing, leading, or from the side. In previous work, we were able to show that such a cutting process can be realized for NVEB by adapting a trailing gas jet to existing technology [6] [7]. Adapting a gas nozzle from a standard oxy-cutter to our NVEB welder, we were able to realize a melt cutting process using nitrogen or argon as well as a NVEB-oxy-cutting process using oxygen.…”

Section: Thermal Cuttingmentioning

confidence: 99%

“…Thermal cutting with an electron beam as energy source has been shown by our group [6] [7], indicating a high potential to establish the non-vacuum electron beam for a novel cutting process. The NVEB cutting process developed at Leibniz Universität Hannover is considerably different from standard thermal melt cutting processes.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Cutting and Welding of High-Strength Steels Using Non-Vacuum Electron Beam as a Universal Tool for Material Processing

Hassel¹,

Murray²,

Klimov³

et al. 2016

WJET

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Using a non-vacuum electron beam, a two-step process chain for plate materials is a feasible possibility. Cutting and welding can be performed in subsequent steps on the same machine for a highly productive process chain. The electron beam is a tool with high energy conversion efficiency, which is largely independent of the type of metal. Its high power density qualifies the non-vacuum electron beam as an outstanding energy source for the well-known NVEB welding as well as for high-speed cutting. Welding is possible with or without filler wire or shielding gas, depending on the application. The NVEB-cutting process employs a co-moving cutting head with a sliding seal for extremely high cutting speeds producing high quality edges. Due to direct removal of fumes and dust, NVEBC with local suction is an exceptionally clean and fast process. The NVEB welding process is possible directly after cutting, without further edge preparation. The potential directions of development of non-vacuum electron beam technologies are discussed. An exemplary two-step process chain using high-strength steel is presented to highlight possible application in industries such as general steel construction, automotive, shipbuilding, railway vehicle or crane construction. An analysis of the mechanical properties of the resulting weld seam is presented.

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Section: Thermal Cuttingmentioning

confidence: 71%

Section: Thermal Cuttingmentioning

confidence: 99%

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Cutting and Welding of High-Strength Steels Using Non-Vacuum Electron Beam as a Universal Tool for Material Processing

Hassel¹,

Murray²,

Klimov³

et al. 2016

WJET

View full text Add to dashboard Cite

show abstract

“…In additional, usually such beams are formed by the cathodes with large emission surface, therefore the convergence angle of beam is generally large and its focal diameter is not so small, range of few millimeters. Just today HVGD electron guns widely used in various branches of industry, in particular in the electronic industry, instrument building, mechanical engineering, metallurgy, automobile and aerospace industry [5][6][7][8][9]. The main advantages of these types of guns, regarding the possibility of their industrial application, are operation in a soft vacuum in the medium of various technological gases, including noble and active gases, high stability and reliability of operation of the HVGD electron, the relative simplicity of the design and the cheap of HVGD electron guns, as well as stability and reliability of its operation [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

Basic algorithm for approximation of the boundary trajectory of short-focus electron beam using the root-polynomial functions of the fourth and fifth order

Melnyk,

Pochynok

2023

SRIT

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The new iterative method of approximating the boundary trajectory of a short-focus electron beam propagating in a free drift mode in a low-pressure ionized gas under the condition of compensation of the space charge of electrons is considered and discussed in the article. To solve the given approximation task, the root-polynomial functions of the fourth and fifth order were applied, the main features of which are the ravine character and the presence of one global minimum. As an initial approach to solving the approximation problem, the values of the polynomial coefficients are calculated by solving the interpolation problem. After this, the approximation task is solved iteratively. All necessary polynomial coefficients are calculated multiple times, taking into account the values of the function and its derivative at the reference points. The final values of polynomial coefficients of high-order root-polynomial functions are calculated using the dichotomy method. The article also provides examples of the applying fourth-order and fifth-order root-polynomial functions to approximate sets of numerical data that correspond to the description of ravine functions. The obtained theoretical results are interesting and important for the experts who study the physics of electron beams and design modern industrial electron beam technological equipment.

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Modelling of heat transfer process in non-vacuum electron beam additive manufacturing with CuSi3 alloy wire

Mukin

Valdaytseva

Hassel³

et al. 2020

Materials Today: Proceedings

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Nonvacuum electron beam cutting and welding—two partnering processes for fast and highly efficient metal working

Cited by 3 publications

References 1 publication

Cutting and Welding of High-Strength Steels Using Non-Vacuum Electron Beam as a Universal Tool for Material Processing

Cutting and Welding of High-Strength Steels Using Non-Vacuum Electron Beam as a Universal Tool for Material Processing

Basic algorithm for approximation of the boundary trajectory of short-focus electron beam using the root-polynomial functions of the fourth and fifth order

Modelling of heat transfer process in non-vacuum electron beam additive manufacturing with CuSi3 alloy wire

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