National Repository of Grey Literature 19 records found  1 - 10next  jump to record: Search took 0.00 seconds. 
Abrasive water jet machining of hard-to-machine materials
Kubín, Matěj ; Polzer, Aleš (referee) ; Píška, Miroslav (advisor)
The diploma thesis deals with unconventional technology of material separation by water jet with abrasive. It describes the influence and specification of technological parameters of the water jet on the quality of the cutting surface. The work contains an experiment, where the aim was to achieve from the theory the influence of tech-nological parameters on surface roughness on composite materials from glass fiber and carbon fiber.
Water Jet 2017 - Research, Development, Applications. Proceedings of the Conference on Water Jetting Technology
Klichová, Dagmar ; Sitek, Libor
Conference Water Jet 2017 – Research, Development, Applications coincides\nwith major changes in key technologies and economy which recently started to\nincrease pace.\nUpcoming electric mobility will strongly influence production technology in\nthe automotive industry leading probably to declining content of water jetting\nprocesses.\nThe continuing trend for automation will have an extreme impact on water jet\nbusiness. Merging robotic and data control systems with smart water jet tools will\nbe a demanding future task.\nThe need for energy saving remains unchanged and directs scientific focus on\nhigh efficient jetting, cutting and cleaning processes as well as tools. This is\nthe only way to gain substantial savings as efficiency of state of the art pump\nsystems is already on a very high level.\nTraditional technologies are moving towards marine applications. Subsea\nexploration becomes more and more important for basic raw material supply. Both\nmaintenance and decommissioning of vessels and offshore structures is already\na growing domain for special water jetting applications. Aquafarming substantially\ncontributes to supply a constantly growing human population with sea food\nwhereat water jet cleaning helps to keep high quality farming standards.\nAll these changes are linked up with associated HSE requirements. High\nefficiency, safe, ergonomic and reliable equipment as well as water treatment are\nkey factors for future developments.\nA strong scientific and engineering effort is required to meet these current and\nfollowing challenges. Water Jet 2017 Conference is organized by the Department of\nMaterial Disintegration of the Institute of Geonics.
Properties and characteristics of recycled garnet abrasives for AWJ
Martinec, Petr ; Hlaváček, Petr ; Ruppenthalová, Lucie ; Sitek, Libor
The use of recycled garnet abrasive from sludge after cutting materials is a current\nproblem. The behavior of individual garnet abrasives in the AWJ process depends\non the geological origin of the garnets, which also affects all the material\ncharacteristics of the garnet recyclate. The parameters of the BARTON HPX80 and\nGMA 80 abrasive inputs and their recycled products were compared: mineralogical\ntype, apparent density, granularity, grain shape and mineralogical purity,\nmicrohardness data and the degree of damage to the garnet grains. All individual\nparameters of abrasives and their recyclates are reflected in the index of cutting\nefficiency of abrasive. The effect of abrasive material properties on cuttability of\nabrasives is synergistic. The new parameters in the evaluation of abrasives are\nmicro-hardness (brittleness criterion), specific surface and pore size distribution\n(internal grain damage criterion).
Evaluation of quality of cut surfaces created by abrasive water jet according to swiss standard SN 214001
Klichová, Dagmar ; Gurková, Lucie
The article focuses on the evaluation of the quality of cut surfaces created by\nan abrasive water jet (AWJ) according to the Swiss standard SN 214001 (2010).\nThe standard presents a quantified description of the texture of the cut. It defines\nnew parameters and methods of parameter measurements used in order to\ncategorize the cut surface in various quality levels Q. They are so far the most\ncommonly applied form of the qualitative description of the quality of the cut\nsurfaces created by the AWJ technology.
Abrasive water jet drilling of cooling holes in aeroengines: preliminary experimental study
Hlaváček, Petr ; Zlámal, T. ; Sitek, Libor ; Georgiovská, Lucie
This paper addresses an experimental investigation on the feasibility of using\nabrasive water jet (AWJ) for the drilling of small-diameter holes in aeroengines\ncomponents. These components are sprayed with ceramic thermal barrier coating\n(TBC). The required holes are typically 0.5 to 1 mm in diameter with a drilling\nangle of 30 to 90 deg. The parameters of the AWJ were varied to study their effects\non both quantitative and qualitative hole drilling parameters.
3D abrasive water jet
Maříková, Petra ; Prokop, Jaroslav (referee) ; Osička, Karel (advisor)
This master's thesis deals with abrasive water jet cutting in the introduction. Another part is focused on deploying technology 3D cutting with abrasive water jet in conditions of a medium-sized company. This technology allows the elimination of bevels, and angel cutting. The following sections deal with technological capabilities of the specific machine and experimental comparison of samples cut by AWJ and DWJ technology. The work also includes a sample layout of machines on existing premises, the proposal for a potential component base and economic evaluation.
Abrasive water jet cutting
Midrla, Zdeněk ; Kubík, Roman (referee) ; Osička, Karel (advisor)
This master thesis is consisted of literature search and practise part with focusing on the theme of abrasive water jet cutting. Introductory chapters deal with various methods and principles water jet cutting. Following chapters deal with quality of cutting surface by abrasive water jet cutting. After these chapters is introduced machine equipment of water jet cutting technology. At the end of this theoretical part are listed advantages and comparison with other unconventional technologies. In the practical part is solved design of machinery with regard to manufacturing technology of component flange in series 630 000 pieces per year. Last chapter describes economic evaluation of production.
Production of replacement part for pump of waterjet cutter
Vrána, Lukáš ; Slaný, Martin (referee) ; Zemčík, Oskar (advisor)
The thesis contains a theoretical part dealing with non-conventional water jet technologies. The first part deals with analysis of water jet technology and possible uses for machining operations. The practical part deals with the issue part of the pump and its possible production process. The conclusion is technical-economically evaluation.
Cost-effect and technical comparison of nonconventional technologies AWJ and LBM with the view of needs of a company
Malát, Jan ; Dvořák, Jaromír (referee) ; Slaný, Martin (advisor)
This study deals with unconventional materials cutting technology with a fo-cus on abrasive water jet cutting and CO2 laser. The thesis is divided into theoretical and experimental section. The theoretical part describes principles and functions of nonconventional technologies, the basic division and practical applications. The practical part is focused on choosing the best technology with the production of samples and their subsequent comparison. The thesis recommends producer and type of the machine which best meets requirements on basis of the test results.
Cutting of Water Jet
Zouhar, Ondřej ; Slaný, Martin (referee) ; Osička, Karel (advisor)
The work developed in the master's program, describes the technology of water jet cutting. The theoretical part deals with the description of this technology and it explains the basic concepts used in this field. The practical part was designed to verify some theoretical knowledge. Therefore, several experiments were performed, while there was studied the influence of abrasives on the final quality of the surface and the level of the generated noise. The practical part was completed by the production of the selected component and its technical and economic evaluation.

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