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SMV-2013-09:Electron Beam Welder MEBW-60/2
Zobač, Martin ; Vlček, Ivan ; Dupák, Jan ; Dupák, Libor ; Kapounek, Petr
License fee from production and sales of the electron beam welder MEBW-60/2, which research and development was conducted at ISI in years 2006-2008. The device is significantly upgraded version of the electron beam welder developed at ISI during past 20 years. It features a working chamber with volume of 7 liters, an electron gun with accelerating voltage of 60 kV. The beam power is fluently adjustable up to 2 kW. For movement of the welded pieces it is possible to use 2-axis motorized manipulator. The control of the welder is fully digital and all functions are available to user through movable control panel. The device includes work table with work area large enough for needed preparatory work. Spatial arrangement is variable so it allows customization in place of installation.
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SMV-2013-08: Research and development of electron guns designed for electron beam welding
Zobač, Martin ; Vlček, Ivan
The subject of the project was the research and development of the electron gun for electron beam welding with accelerating voltage 60 kV and maximal power 2 kW. The improvements in functionality and safety in comparison with the previous versions of the gun were reached according to client requirements. The project, characterized by solving problems from different fields (physics, electronics, mechanics, production technologies, measurement), resulted in the realization of several functional prototypes, which were successfully tested in cooperation with the client.
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SMV-2012-02: Research and development of electron guns designed for electron beam welding
Vlček, Ivan ; Zobač, Martin
The subject of the project was the research and development of the electron gun for electron beam welding with accelerating voltage 60 kV and maximal power 2 kW. The improvements in functionality and safety in comparison with the previous versions of the gun were reached according to client requirements. The project, characterized by solving problems from different fields (physics, electronics, mechanics, production technologies, measurement), resulted in the realization of several functional prototypes, which were successfully tested in cooperation with the client.
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Small-Volume Reactive Metal Alloys Prepared by Electron Beam Melting
Zobač, Martin ; Vlček, Ivan ; Zobačová, Jitka ; Rek, Antonín
The paper deals with the preparation of small volumes of reactive metal alloys (particularly titanium), utilizing an electron beam as the heat source. The melting was performed in a vacuum environment in order to prevent the compounds from reacting with atmospheric components. The water-cooled crucible avoids any contamination of the alloy, which would have otherwise arisen during the heating of the materials. The composition of resulting alloys were then investigated by energy-dispersive X-ray spectroscopy
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Institute of Scientific Instruments: An Overview Presenatation
Kolařík, Vladimír ; Zobač, Martin ; Fořt, Tomáš ; Vlček, Ivan ; Dupák, Libor ; Mikmeková, Šárka ; Mikmeková, Eliška ; Mrňa, Libor ; Horáček, Miroslav ; Sobota, Jaroslav
The aim of this contribution is to present the Institute of Scientific Instrument of the Academy of Sciences of the Czech Republic, mainly from the potential of applied research viewpoint. It covers mainly the six application fields including material study of metals and alloys, nano layer residual stress observation methods, 2 kW fibre laser, impact testing of hard coatings, e-beam welding, machining and engraving, and finally e-beam lithography. Recently achieved results as well as the new application potential are presented. Furthermore, each topic is assumed to have a separate presentation prepared in more details within this event. A brief overview follows. Scanning low energy electron microscopy (SLEEM) is increasingly becoming recognized as a valuable analytical tool in the field of materials science. The SLEEM is also used for observation of compressive stress in nano layers that leads to wrinkling and film delamination. Using the fibre laser, we can offer 3D laser welding and cutting of various type of materials and laser surface hardening too. For the hard coatings testing and evaluation of their impact resistance a new method was suggested (Dynamic Impact Wear Test). During testing the specimen is cyclically loaded by tungsten carbide ball that impacts of the coating/substrate surface. In house e-beam welding machine allows for welding, machining, engraving and other utilizations of intense electron beam. The group of micro lithography is able to prepare micro and nano structures in thin layers of metals and other materials; including the characterization of the realized structures
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