Dissertations / Theses on the topic 'Water jet cutting'
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Sucosky, Philippe. "Water jet cutting of silicon : kerf width prediction." Thesis, Georgia Institute of Technology, 2000. http://hdl.handle.net/1853/17511.
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Arab, Paola Bruno. "Rock cutting by abrasive water jet: an energy approach." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/18/18132/tde-11072017-152834/.
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Abrasive waterjet (AWJ) cutting is a versatile technique which has been effectively applied to rock cutting since the late 1980s. The complexity of the interaction between the waterjet and the rocks complicates the thorough understanding of the phenomena involved in AWJ rock cutting. On one hand, rocks are complex materials which are generated through different processes in an uncontrolled environment without human interference. On the other hand, the AWJ acts with high velocity and turbulence, complicating direct observation and the perception of details. In this respect, the present research aims to contribute to the study of AWJ cutting applied to rocks, including the analysis of qualitative and quantitative information, both of great importance regarding the study of complex materials. Concerning quantitative data, special attention is given to the investigation of the cutting efficiency, which can be analyzed by observing conditions in which the higher cutting rate is associated with the minimum energy provided by the AWJ machine per removed volume of rock. Moreover, the real efficiency can be analyzed through the investigation of the conditions in which the major part of the energy provided by the AWJ machine is used effectively for rock cutting, deducting dissipation losses. The effects of varying traverse velocity and pump pressure on cutting parameters were also investigated, in addition to the influence of rock properties on the effective energy of cutting. The effective energy was calculated based both on the specific energy and specific destruction work of the materials. With respect to the qualitative investigation, petrographic and scanning electron microscopy (SEM) analyses were conducted in order to visualize and better understand the different effects of cutting on the studied rocks. Cutting tests with a traverse velocity of 200 mm/min and a pump pressure of 400 MPa presented the most efficient rock cutting regarding both methods of efficiency analysis. Dry density and tensile strength presented fair correlations with the effective cutting energy, while the modulus ratio presented the best correlations. It was observed that brittleness plays a key role in the understanding of the phenomena involved in AWJ rock cutting.O jato d\'água abrasivo (AWJ) é uma técnica versátil que tem sido efetivamente aplicada ao corte de rochas desde o fim da década de 1980. A complexidade da interação entre o jato e as rochas dificulta a compreensão detalhada dos fenômenos envolvidos no corte de rochas com AWJ. Por um lado, rochas são materiais complexos gerados em ambientes sem interferência humana. Por outro lado, o AWJ age com alta velocidade e turbulência, dificultando a observação direta do procedimento. Assim, a presente tese de doutorado visa a contribuir com o estudo do corte de rochas com AWJ, incluindo análises de dados qualitativos e quantitativos, ambos de grande importância em estudos de materiais complexos. A análise quantitativa possui foco na investigação da eficiência de corte, a qual pode ser analisada por meio da observação das condições em que há a maior taxa de corte associada à mínima energia fornecida pelo AWJ por volume de rocha removido. Além disso, a eficiência real do corte pode ser analisada a partir da investigação das condições em que a maior parte da energia fornecida pelo AWJ é usada para efetivamente cortar a rocha, descontando perdas por dissipação. Os efeitos da variação da velocidade transversal de corte e da pressão da bomba nos parâmetros de corte também foram investigados, além da influência das propriedades das rochas na energia efetiva de corte. A energia efetiva de corte, denominada energia relativa de formação da ranhura (EKR), foi calculada com base na energia específica e no trabalho de destruição específico dos materiais. Análises de microscopia eletrônica de varredura (SEM) e petrografia foram conduzidas para visualizar e compreender melhor os diferentes efeitos do corte nas rochas estudadas. Os testes de corte realizados com velocidade transversal do bocal de 200 mm/min e pressão da bomba de 400 MPa apresentaram as melhores eficiências de corte considerando-se ambos os métodos de análise de eficiência. Dentre as propriedades das rochas investigadas, a massa específica e a resistência à tração por compressão diametral apresentaram correlações razoáveis com EKR, enquanto que o modulus ratio apresentou as melhores correlações. Observou-se que a ruptibilidade possui papel fundamental na compreensão dos fenômenos envolvidos no corte de rochas com AWJ.
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Ohlsson, Lars. "Abrasive water jet cutting : an experimental and theoretical investigation." Licentiate thesis, Luleå tekniska universitet, 1992. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-17801.
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Lamache, Anthony. "Feasibility study of abrasive waterjet silicon cutting." Thesis, Georgia Institute of Technology, 1998. http://hdl.handle.net/1853/15827.
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Goodfellow, Paul R. A. "The influence of microstructural rock properties on water jet assisted cutting." Thesis, University of Exeter, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.259193.
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Abudaka, Mashhour. "Development of a high pressure abrasive water jet for cutting operations." Thesis, Imperial College London, 1989. http://hdl.handle.net/10044/1/47327.
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Abu, Ibrahim Fadi 1980. "Designing a low cost XY stage for abrasive water jet cutting." Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/17930.
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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2004.Includes bibliographical references (p. 67).
This thesis guides the reader through the design of an inexpensive XY stage for abrasive water jet cutting machine starting with a set of functional requirements and ending with a product. Abrasive water jet cutting allows for mass customization of 2D parts, such as inlaid tiles. Most water jet cutters are based on a prismatic-prismatic design (gantry type). In an effort to reduce the number of precision parts in the machine, a rotary-rotary parallel drive design is proposed. The proposed mechanism will be actuated by electric DC windshield wiper motors directly coupled to the links, this eliminates the need for gearing mechanisms that add up to the total cost and complexity of the design. Kinematics of the design is simulated for a working area of 310mm x 310mm. Dynamic analysis is performed and the concepts of decoupled and configuration invariant inertia are derived, simplified to a set of conditions on the kinematic structure/mass properties of the arm linkages and applied to significantly simplify the mechanism's control system. The XY stage was designed to be inexpensive and small enough to be placed in hardware stores, garages and small machine shops. A vision of water jet cutters sold in boxes stacked on shelves in Wal-Mart, available for all machinists, artists, schools, and industries might one day thus become a reality if the pumps could also be made cheaply.
by Fadi Abu Ibrahim.
S.M.
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Grygla, Michael S. "An investigation of methods to homogeneously entrain and suspend abrasive particles in a low pressure dental water jet /." Diss., CLICK HERE for online access, 2007. http://contentdm.lib.byu.edu/ETD/image/etd1693.pdf.
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Lauque, Olivier. "Effects of abrasive waterjet erosion on single crystal silicon." Thesis, Georgia Institute of Technology, 1998. http://hdl.handle.net/1853/16782.
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Roberson, Joshua. "Abrasive waterjet damage of silicon wafers." Thesis, Georgia Institute of Technology, 2000. http://hdl.handle.net/1853/18960.
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Zhao, Xuan Liang. "A fracture mechanics study of unassisted and water jet assisted rock disc cutting." Thesis, University of Newcastle Upon Tyne, 1989. http://hdl.handle.net/10443/823.
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The work presented in the thesis introduces the use of the principles of fracture mechanics on the mechanism of rock breakage by disc cutters with and without water jet assistance. The work may be divided into five major parts: 1. Rock fracture tests; The values of fracture toughness are measured from three different directions of the rock blocks by three different testing methods: radially cracked ring specimens, three point bend specimens and short bar specimens. The effect of moisture on the fracture toughness was also investigated. 2. Indentation tests; A primary study of the use of a disc cutter as a type of indenter has been carried out. These tests provided a parameter, contact pressure, for predicting the disc cutting forces and understanding the fragmentation of the rock during cutting. 3. Water jet assisted disc cutting tests; The factors influenced the performance of water jet assisted disc cutting were investigated, including: a) The pressure of the water jet; b) The position of the water jet nozzle; c) The cutting speed; and d) The spacing distance and penetration depths. 4. Theoretical analysis of disc forces; Based on a widely accepted assumption, a simple mathematical model was developed for the relationships between the cutting forces. The indentation fracture theories were used to predict the performance of disc cutting. A further use of the predictor equations in the water jet assisted cutting was also investigated. 5. The analysis of stress distribution beneath the disc cutter; Boundary element method was used in the investigation of the stress distribution beneath the disc cutter. The effects of geometries of the disc cutters, spacing distance, penetration depth were also considered.
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Ip, Chun Keung. "Laboratory water jet assisted drag tool rock cutting studies at high traverse speeds." Thesis, University of Newcastle Upon Tyne, 1986. http://hdl.handle.net/10443/814.
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Water jet assistance has shown many promising benefits to drag tool rock cutting. However, the basic failure mechanism of hybrid cutting is not well understood. In addition, most previous laboratory investigations have been carried out with cutting speeds of less than 0.25 m/s, whilst typical tool speeds for a production boom-type tunnelling machine cutting hard rock is over 1.0 m/s. Potentially erroneous conclusions may be obtained unless laboratory cutting speeds are comparable with those used in the practical situation. Based on the research work carried out under a three-year contract sponsored jointly by the Science and Engineering Research Council and the European Coal and Steel Community, this thesis examines the cutting mechanisms when a water jet and a drag tool are acting together. Over one thousand cuts have been carried out in five rock types which cover a wide range of strength and abrasivity. A linear cutting rig was modified to enable cutting speeds up to 1.10 m/s to be obtained. Jet pressures up to 70 MPa were provided by a 75-kW water pump. Based on the cutting mechanisms of the drag tool and the effect of the water jet action, a hybrid cutting model is proposed. To obtain significant tool force reductions, the jet power must be greater than either the threshold jet power for slotting, or a critical jet power for hydraulic fracturing. Depending on the jet power, rocks can be separated into two groups, one with significant jet penetration and the other without. For rocks with significant jet penetration, the force reductions with water jet assistance can be estimated from the jet penetration characteristic. An optimum jet penetration was found to exist which provided the maximum force reductions. For rocks without jet penetration, the force reduction is marginal except when the jet power exceeds the critical jet power for hydraulic fracturing. An expression is given which characterises the functional relationship between force reduction and jet penetration. When the jet penetration for the rock is insignificant, an equation is proposed to estimate the critical jet power required.
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Horáček, Lukáš. "Využití nekonvenčních paprskových technologií (LASER/vodní paprsek) ve strojírenství." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2008. http://www.nusl.cz/ntk/nusl-228168.
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This thesis deal with utilization unconventional beam technology (LASER/ water jet) in machine. The aim works is analysis technological possibility method laser and analysis technological possibility method water jet. Further aim of this work is mutual trade-off of the both methods unconventional beam technology and technical economic interpretation.
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Zouhar, Ondřej. "Řezání vodním paprskem." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2011. http://www.nusl.cz/ntk/nusl-229679.
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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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Guo, Zihong. "Experimental and numerical analysis of abrasive waterjet drilling of brittle materials /." Thesis, Connect to this title online; UW restricted, 1998. http://hdl.handle.net/1773/7092.
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Knapp, Andreas. "Water-Jet-Cutting im Schweinehirn Abhängigkeit der Dissektionstiefen und Schneideeigenschaften von Wasserdruck und untersuchter Hirnregion /." [S.l.] : [s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=972332804.
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Martin, John Andrew Peter. "The study of high pressure water jet assisted cutting of coal samples in the laboratory." Thesis, University of Newcastle Upon Tyne, 1991. http://hdl.handle.net/10443/818.
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A series of experiments were conducted to invesdgate high pressure water jet assisted coal cutting. The research was sponsored by British Coal and carried out in the Department of Mining Engineering at the University of Newcastle upon Tyne. Two coals were tested: a black, coherent, anthracite; and a heavily cleated, friable, dull coloured bituminous coal. The tests modelled as closely as possible a vane pick on a two start shearer drum. The experiment was performed on a modified 50 tonne linear cutting rig at a speed of I. Im/s, using jet pressures of 35MPa, 70MPa, and 105MPa at different flow rates. A 75kW double acting intensifier type pump supplied the high pressure water for the jet. A relieved cutting mode was adopted with a line spacing of 70mm, and a 30mm nominal depth of cut. An actual production cutting tool (heavy duty 75mm radial with a HW tip) cut the coal in both the sharp and blunt states. Additional tests were also performed by pre-slotting the coal with a water jet before cutting it and by examining the effect of varying the lead and offset distances on the parameters measured below. Parameters measured were the cutting forces in three orthogonal directions; the breakout patterns; and the coal size distribution. The coal yields and specific energies were calculated from the experimental data. Both coals achieved benefit from jet assistance but at different pressures depending upon the coal type and tool wear. The breakout pattern differed between the two coals but generally fracture occurred along the major cleat planes. Both coals were easier to cut when the major cleat was orientated in the horizontal plane rather than in the vertical plane. Specific energy increased linearly with jet power. In most cases the quantity of fine coal (-0.5mm) produced decreased with jet assistance.
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Prax, Ondřej. "Nekonvenční metoda obrábění vodním paprskem." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2011. http://www.nusl.cz/ntk/nusl-229665.
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The master thesis contains a literature search dealing with the unconventional technology of water jet cutting. The first part is aimed to description of the water jet technology and shows the possibilities of controlling and awarding data for cutting. Follows the chapter about the influences of the input parameters to a surface quality and machining accuracy. The thesis also giving an account of ecological factors of the water jet cutting. The description of the whole technology for production of the sprocket is a part of the thesis. The last part of the thesis is solving the economics of the water jet cutting technology, especially for production of the sprocket with comparing dependency of the cutting conditions.
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Tadic, Dihon Misha. "Investigation of cavitating and pulsed high-pressure water jet devices for process scale removal /." [St. Lucia, Qld.], 2004. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe17660.pdf.
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Midrla, Zdeněk. "Řezání abrazivním vodním paprskem." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2013. http://www.nusl.cz/ntk/nusl-230786.
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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.
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Kocman, Luděk. "Technologie paprskového řezání." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2013. http://www.nusl.cz/ntk/nusl-230769.
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The diploma´s thesis deals with cutting beams technologies. It shows the current knowledge of these cutting methods, their possibilities and applications. The practical part rates benefits of replacement water jet with laser from economic and technological perspective.
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Pederick, Stuart. "Investigation of the effect of waterjet created slots in improving the performance of tricone drill bits in hard rock /." [St. Lucia, Qld.], 2005. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe18616.pdf.
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Llanto, Jennifer M. "Optimisation of process parameters in abrasive waterjet contour cutting of AISI 304L." Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2022. https://ro.ecu.edu.au/theses/2502.
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This research work presents an optimisation of abrasive waterjet contour cutting process parameters with the objectives of maximising material removal rate, whilst minimising taper angle and surface roughness. This thesis contains an in-depth review of the systems behind abrasive waterjet machining and recent progress trends regarding its applications. The impacts of input parameters are investigated including traverse speed, waterjet pressure and abrasive mass flow rate against selected responses in abrasive waterjet contour cutting of austenitic stainless steel 304L. Experimental data is utilised to generate regression models in predicting responses, where the results are statistically evaluated to assess the percentage contribution of each parameter in the performance of contour cutting. Techniques, such as Taguchi and Response Surface Methodology, are employed to perform a single and multi-objective optimisation. Abrasive waterjets demonstrate similar responses in cutting curvature and straight line profiles during contour cutting. The study reveals that an increasing level of waterjet pressure and abrasive mass flow rate results in lower surface roughness, lower kerf taper angle and higher rate of material removal. Similarly, a lower rate of traverse speed achieves minimum surface roughness and kerf taper angle, whereas increasing its rate attains the maximum value of material removal rate.
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Jurka, Pavel. "Racionalizace malosériové výroby výpalků v podmínkách firmy PARS Nova a.s." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2008. http://www.nusl.cz/ntk/nusl-228101.
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Analysis of the technological possibility ray methods of protoplasm, laser and water jet on the part of needs company Pars Nova a.s.. Propsal concrete of unconventional method. Process layout and exigencies of working designed method. Security and ecological diversification of designed method. Technical – economics evaluation contribution designed of unconventional technology.
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Strouhal, Lukáš. "Technologie obrábění laserem." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2020. http://www.nusl.cz/ntk/nusl-417126.
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The master’s thesis deals with laser cutting technology and application in the industry. The first part of the thesis describes principle of laser beam creation, division and application of lasers in industry. The Experimental part is focused on cutting the workpiece using a laser and water jet in company named SMR Plus s.r.o., sample preparation and examining the structure of workpiece. Surface structures are compared with workpieces from water jet at the end of thesis.
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Rašková, Jana. "Design stroje pro řezání vodním paprskem." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2016. http://www.nusl.cz/ntk/nusl-241854.
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The aim of this thesis is an innovative approach to design of machines for waterjet cutting with technical, aesthetic, ergonomic and ecological requirements. The work focuses on the interaction between user and machine in small batch operation.
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Pichler, Rosimeri Franck. "Design, tecnologia e valorização local : estudo de técnicas de beneficiamento em serpentinito para uso como material gemológico aplicado ao design de joias." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2014. http://hdl.handle.net/10183/118900.
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O Design, sendo uma atividade responsável pela criação de bens materiais, vem incorporando características culturais e saberes locais no desenvolvimento de produtos. O interesse por produtos culturais acarreta em desenvolvimento para as regiões produtoras, refletindo em diversos âmbitos da vida em sociedade, impulsionando e aumentando a competitividade do mercado local. Para isso, as tecnologias são fundamentais na promoção de inovações em produtos, facilitando o processo de produção e permitindo novas aplicações. Desta forma, a união destes dois fatores, tecnologias e valorização de produtos culturais, podem acarretar em ganhos, tanto para a região produtora, como para o país, no oferecimento de produtos com maior valor agregado. O serpentinito, considerado uma gema ornamental rara do Rio Grande do Sul, não possui atualmente uso comercial. O principal mineral constituinte dessa rocha são minerais do grupo das serpentinas, que podem ocorrer como agregados maciços e lamelares (antigorita e lizardita) e como cristais fibrosos (crisotilo). Assim, este trabalho tem como objetivo estudar as técnicas de beneficiamento em serpentinito, a fim de valorizar sua utilização como material gemológico para aplicação em joalheria. Para a caracterização mineralógica do serpentinito, utilizou-se lupa binocular, difratometria de raios X e microscópio petrográfico. As técnicas testadas para seu beneficiamento foram: corte por jato d’água, gravação a laser, polimento e resinagem. Para análise das interações das técnicas empregadas com o material, utilizou-se a lupa estereoscópica, microscópio eletrônico de varredura (MEV) e medidor de brilho (Gloss meter). Obteve-se resultados satisfatórios quanto a aplicação das técnicas no serpentinito, mas estes variam, conforme a textura da rocha. Em rochas com predominância de antigorita e lizardita, recomenda-se o uso da técnica de corte por jato d’água e a gravação a laser de preenchimento para obtenção de texturas superficiais. Em rochas com crisotilo, recomenda- se a realização de cortes com serra diamantada de precisão e o uso da gravação a laser de linhas e preenchimentos, para criação de elementos gráficos de média complexidade. Para o polimento, recomenda-se o uso de lixas de carbeto de silício (carborundum), partindo da faixa de grão 180 até 2000, para rochas com predominância da serpentina antigorita, e da faixa de grão 320 até 2000, para rochas com predominância da serpentina crisotilo. O tempo de cada etapa de lixamento é de 2 minutos e velocidade em torno de 300 rpm. Para proteção do material e obtenção de um brilho mais intenso, recomenda-se a aplicação de resina acrílica como etapa final do processo de beneficiamento.Design as an activity for developing material goods, has been adding cultural characteristics and local knowledge in the development of products. The interest in cultural products brings progress for the producing regions, reflecting in different areas of social life, promoting and increasing the competitiveness of the local market. For this reason technologies are very important, to promote innovations in products, to enable the production process and new applications. So, the union of these two factors, technologies and valorization of cultural products, providing products with a bigger added value, may result in improvement for the producing region and also for its Country. Serpentinite, a rock used as a rare ornamental gemstone occurs in Rio Grande do Sul State (Brazil) and currently does not have commercial use. The main mineral of this rocks are of serpentine group, that may occur as massive and lamelar aggregates (antigorite and lizardite) and as fibrous crystals (chrysotile). This research aims to study processing techniques to apply in this serpentinite, in order to increase its use as gemological material for use in jewelry. The mineralogical characterization of serpentinite were done with a stereoscopic loupe, X-ray diffraction and with petrographic microscopy. The processing techniques tested were cut by water jet, laser engraving, polishing and resin coating. To analyze the interactions of this techniques with the serpentinite, it was used a stereoscopic loupe, a Scanning Electron Microscope (SEM) and a gloss meter. The results obtained with the application of the processing techniques in serpentinite are good, but vary according to the texture of the rock. In rocks with predominance of antigorite and lizardite, is recommend the use of cutting by water jet and the use of filled shapes laser engraving to obtain surface textures. In rocks with chrysotile, it is recommended to use precision cut diamond saw and the use of laser engraving lines and fill shapes to create graphics of medium complexity. To obtain a good polishment, the use of silicon carbide (carborundum) sandpaper is recommended, with the grit of 180 until 2000, for rocks with predominance of antigorite, and the grit of 320 until 2000, for rocks with predominance of chrysotile. The sanding time for each step is 2 minutes with a speed around 300 rpm. To protect the material and to obtain a better luster, is recommend the application of an acrylic resin as a final step of the improvemente process.
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Langr, Aleš. "Návrh vhodné technologie výroby pro součást "patka sloupku"." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2014. http://www.nusl.cz/ntk/nusl-231059.
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Master's thesis, elaborated within Master's degree, submits a proposal of suitable technology for manufacturing “column foot“ part, which attaches filtration unit to the ground. Material is 6 mm thick sheet steel in accordance with ČSN 41 1375 norm. Run (/production batch) of the part is 4 000 pieces per year. On the basis of literary study about unconventional technologies for flat sheet metal production 3 technologies were suggested: plasma cutting, water jet cutting and laser cutting. These technologies were technologically and economically analyzed. At the end thesis evaluates whether purchase of respective machine would pay out for the firm or they should continue to buy parts from cooperation company.
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Holík, Radek. "Návrh na zefektivnění opracování desek z kompozitních materiálů." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2016. http://www.nusl.cz/ntk/nusl-241848.
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This master thesis is dealing with the analysis of current technology of machining based on unconventional method of water jet cutting for sheet machining of composite materials. My goal is to analyze and calculate the cost of technologies. There is, in conclusion of the master thesis, the techno-economic evaluation and final decision whether it is appropriate to invest in a new technology or not.
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Brym, Radek. "Trendy vývoje obrábění vodním paprskem." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2008. http://www.nusl.cz/ntk/nusl-228165.
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In diploma thesis there is elaborated the analysis of assumed development of water jet technology and there is analyzed the level of water jet method in production. There are introduced the possibilities of new applications of water jet machining and the possibilities of it’s future development. There is think over the enlargement of this method in next 5 years. Simultaneously there is solved the question of techno economic operation severity of this technology.
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Šimíček, Václav. "Nekonvenční technologie obrábění vodním paprskem." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2010. http://www.nusl.cz/ntk/nusl-229099.
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This diploma thesis deals with the unconventional technology of cutting water jet. The aim of this thesis is analysis of technological possibilities of water jet, possible operating modes (techniques) and entering technological data and influence of technical parameters on quality and accuracy of cutting. The thesis contains several experiment at which was examined achieved quality and accuracy of cuts, and simultaneously there is solved technoeconomic evaluation of this technology.
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Fizek, Šimon. "Návrh zařízení pro řezání vodním paprskem." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-401009.
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The topic of this diploma thesis is defining parameters of a new machine for cutting using water jet with abrasive. There are three solutions designed. By multicriterial evaluation is chosen one solution witch processes production of the one machine.
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Gudimetla, Prasad. "Abrasive waterjet cutting of polycrystalline alumina ceramics-modelling, process optimisation & finite element analysis." Thesis, Queensland University of Technology, 2001.
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Zhong, Yu Mechanical & Manufacturing Engineering Faculty of Engineering UNSW. "A study of the cutting performance in multipass abrasive waterjet machining of alumina ceramics with controlled nozzle oscillation." Publisher:University of New South Wales. Mechanical & Manufacturing Engineering, 2008. http://handle.unsw.edu.au/1959.4/41216.
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An experimental investigation has been undertaken to study the depth of cut in multipass abrasive waterjet (AWJ) cutting of an 87% alumina ceramic with controlled nozzle oscillation. The experimental data have been statistically analysed to study the trends of the depth of cut with respect to the process parameters. It has been found that multipass cutting with controlled nozzle oscillation can significantly increase the depth of cut. Within the same cutting time and using the same cutting parameters other than the jet traverse speed, it has been found that multipass cutting with nozzle oscillation can increase the depth of cut by an average of 74.6% as compared to single pass cutting without nozzle oscillation. Furthermore, a multipass cutting with higher nozzle traverse speeds can achieve a larger depth of cut than a single pass cutting at a low traverse speed within the same cutting time. A recommendation has been made for the selection of appropriate process parameters for multipass cutting with nozzle oscillation. In order to estimate the depth of cut on a mathematical basis, predictive models for the depth of cut in multipass cutting with and without nozzle oscillation have been developed using a dimensional analysis technique. The model development starts with the models for single pass cutting which are then extended to multipass cutting where considerations are given to the change of the actual standoff distance after each pass and the variation of kerf width. These predictive models has been numerically studied for their plausibility by assessing their predicted trends with respect to the various process variables, and verified qualitatively and quantitatively based on the experimental data. The model assessment reveals that the developed models correlate very well with the experimental results and can give adequate predictions of this cutting performance measure in process planning.
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Maříková, Petra. "3D abrazivní vodní paprsek." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2013. http://www.nusl.cz/ntk/nusl-230903.
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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.
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Janás, Milan. "Volba vhodné technologie pro výrobu svařované konstrukce elektrokotle JE 12 a JE 6." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2017. http://www.nusl.cz/ntk/nusl-317189.
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The diploma thesis on the selection of appropriate technology to produce the welded construction of electric boiler JE6 / 12 aims to evaluate available production technologies and choose the most suitable of them. Choosing the technologies focuses primarily on those that are available at Slokov. Due to the connection of the welding robot to the production, it is necessary to consider the overall connection of the production and the high accuracy of the production. The individual methods of production, material separation, welding, bending and surface treatment are first theoretically analyzed and their advantages, disadvantages and parameters are summarized. Subsequently, it is practically tested individual technologies for a representative part and it evaluates the achieved parameters and economics of production. With the results obtained, the most suitable technologies are selected. With the selection of technologies, there is a need for a change in design and production parameters. Changes and modifications to the design describe another point. To achieve maximum efficiency and quality of production, a welding robot is used to make welds. The description of the production, modifications and overall design of the robot describes the next point of this work. The last part summarizes the economics of selected production technologies and details the technological process. The aim of the thesis is to design such technologies that will be advantageous from the point of view of the economy and from the perspective of the available possibilities of the company.
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Hort, Zbyněk. "Parametry laserového paprsku." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2017. http://www.nusl.cz/ntk/nusl-318845.
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The diploma thesis consists of the three main parts. The first part deals with the theoretical description of the laser technology and other unconventional technologies. In the second part, the thesis is focused on testing the parameters of the laser and evaluating the most suitable parameters. In the last part the diploma thesis deals with comparison of unconventional technologies in terms of cut quality
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Barp, Denise Rippel Araújo. "Design e materiais : contribuição ao estudo do processo de corte de ágata por jato d'água em formas complexas." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2009. http://hdl.handle.net/10183/18983.
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No estado do Rio Grande do Sul, estão localizadas importantes regiões de extração e processamento do material gemológico ágata. No Distrito Mineiro do Salto do Jacuí encontram-se as maiores jazidas de ágata do Brasil e do Mundo. No município de Soledade se concentram as principais empresas de beneficiamento e comércio de materiais gemológicos. Apesar da abundância de material, a maioria dos objetos produzidos apresenta baixo grau de inovação, os produtos oferecidos no mercado são muito semelhantes entre si e tem, em comum, a falta de diferencial e de utilização de processos que envolvam tecnologia. A ágata é geralmente exportada em estado bruto ou apresentando baixo grau de aproveitamento. O processamento mais comum, utilizado na maior parte das empresas, é o corte em chapas que posteriormente são lixadas, polidas e tingidas em diversas cores. Entre as empresas pesquisadas no presente estudo apenas uma já utiliza processos envolvendo novas tecnologias. Pode-se afirmar que a pesquisa e estudos que auxiliem em um melhor aproveitamento do material ágata possam representar novas oportunidades de produção de objetos e adornos pessoais (jóias) modificando um cenário onde o design inovador é pouco explorado e apresentado. A metodologia empregada para a realização deste estudo contemplou etapas de conhecimento da realidade dos locais de extração, beneficiamento e comercialização de ágata, avaliação dos processos, ensaio de usinagem convencional CNC, ensaios de usinagem não convencional por jato d’água CNC e desenvolvimento de produtos em formas complexas. Foram realizados vinte e quatro ensaios de usinagem, a análise posterior identifica larguras e espessuras ideais buscando a otimização da matéria-prima. Desta forma foi possível alcançar o objetivo principal nesta pesquisa de realizar o corte de ágata com utilização de tecnologia CNC em peças com formas complexas.Rio Grande do Sul State, Brazil, has important regions of extraction and processing of agate. Salto Jacuí Mining District, in the central region of this State, is one of the largest and more importante agate’s mines region of Brazil and even of the World. In Soledade town, there are the most important gemstone processing and trade companies of this State. Despite the abundance of gem materials, most of the objects produced in the different companies are very similar and have in common that they seldom are manufactured using new technological processes. Agate is usually exported as raw material or as cut polished slabs which can be dyed in various colors. Among several companies studied in this research, only one uses industrial processes involving new technologies. So, scientifical studies to indicate a better use of agate produced in Rio Grande do Sul, can provide new opportunities for the production of objects and personal ornaments (jewelry), modifying the trade where innovative designs are little explored. The methodology used in this study had several steps: identification of the extraction, processing and trade places of agate; evaluation of the industrial benefit processes used in agate; testing of conventional CNC machining on agate slabs; and testing on agate slabs of non-conventional computer controled machining by water jet cutting (WJC), with development of complex forms agate products. Twenty-four machining tests were carried out, with further analysis identifying ideal widths and thicknesses to optimize the use of agate raw material. With these tests, it was possible to achieve the goal of this study, which is to cut agate using water jet technology, in order to produce agate objects with complex forms.
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Silva, Karen Rodrigues da. "Design e tecnologia : fabricação de anéis em ágata por corte de jato d'água." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2013. http://hdl.handle.net/10183/96412.
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O estado do Rio Grande do Sul detém grande parte da produção de ágata no Brasil, sendo que o Distrito Mineiro de Salto do Jacuí possui uma das maiores jazidas desse mineral. No processo de beneficiamento dos geodos de ágata, após realizada a seleção de qualidade, os melhores, são destinados ao comércio exterior, e os demais, vendidos aos comerciantes locais para a produção de adornos para casa e para uso pessoal. Entre estes, encontram-se os anéis, confeccionados artesanalmente por pequenas fábricas. Observou-se que esses anéis, adquiridos no comércio de Soledade, RS, e em uma empresa situada na cidade de Lajeado, RS, apresentam diferença entre as suas espessuras laterais. Por lateral entende-se a porção do anel que pode ficar entre os dedos. Essa diferença tende a causar desconforto ao usuário, conhecido por percepção cinestésica, tornando o anel ergonomicamente impróprio para uso diário. A análise do senso cinestésico é realizada pela interpretação do que ocorre com uma parte do corpo quando determinada tarefa é executada, percebendo as forças e tensões exercidas pelo músculo. A partir disso, o objetivo do trabalho foi propor e investigar uma nova forma de fabricação desses adornos, utilizando softwares adequados para modelagem do anel e do equipamento de corte por jato d’água, que poderão proporcionar precisão do corte dos anéis em ágata, além de acelerar o processo de fabricação. Como conclusão do presente estudo, é possível afirmar que há dificuldades em manter a espessura de parede dos anéis, mas, se forem controladas as condições de pressão (318 MPa a 333 MPa) e velocidade de corte do equipamento (10 mm/s), é possível obter espessuras compatíveis para o aro dos anéis.The state of Rio Grande Do Sul produces most of the agate in Brazil. The Salto do Jacuí mining district has one of the largest deposits of this gemological material. In the processing of agate geodes, the best geodes are intended for foreign trade after the quality selection is performed. The others are sold to local traders for the manufacture of home decoration and personal use items. Rings are among these. They are handmade by local and small factories. We observed that these rings, purchased in stores in the city of Soledade (in the state of Rio Grande do Sul) and in a company located in the city of Lajeado (in the same state), have different side thicknesses. Sides are the part of the ring that may be between the fingers. This difference tends to make the person wearing the ring uncomfortable. It is known as kinaesthetic perception, making the ring ergonomically improper for daily use. The analysis of the kinaesthetic sense is carried out by interpreting what happens with a part of the body when a certain task is performed, perceiving the forces and tensions created by the muscle. Based on this, the objective of this paper was to propose and to investigate a new way to manufacture these adornments, using proper softwares to model the ring and the water jet cutting equipment, which will be able to provide precision of the cut of the agate rings, in addition to speeding up the manufacturing process. The present study concludes that it is possible to state that there are difficulties in keeping the thickness of the walls of the rings. However, if the equipment's pressure conditions (318 MPa to 333 MPa) and cutting speed (10 mm/s) are controlled, it is possible to get compatible thicknesses for the hoop of the rings.
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Kučera, Michal. "3D vodní paprsek." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2014. http://www.nusl.cz/ntk/nusl-231503.
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This master thesis deals with the use and technological capabilities of abrasive water jet in the application of 3D cutting head. One part of this thesis is the description of waterjet technology and its other applications. The experimental comparison of the effect of the parameters was carried out for different materials Mach 4 equipment Flow International Corporation in company AWAC, spol. s.r.o. and subsequently the workpieces were subjected to evaluation of the shape and dimensional accuracy.
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Dvořák, Jiří. "Technologie výroby vymezovací podložky." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2011. http://www.nusl.cz/ntk/nusl-229697.
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This master’s thesis has been elaborated as a part of master’s studies of engineering technology M2I-K, major in M-STM – Engineering technology and industrial management and deals with the problem of a transition to a self-production of previously purchased distance washers. Distance washers were purchased in six different types of similar shape, each type in four different thicknesses. One of these types was chosen as a representative for this master’s thesis. We shall explore the possibilities of self-production with the emphasis on economical validation of the transition. The distance washer is a flat part, the intermediate being sheet metal. Technologies considered for manufacturing the washers correspond to the technical facilities and equipment available at the production hall of the company this project is planned for. The company possesses technology for CO2 laser cutting, cutting by CNC punching machine and cutting in the punching tool. To provide a complex overview we shall also enquire into cooperated technologies such as water jet and plasma cutting, oxy-acetyleny cutting and CNC working. All options are evaluated with regard to the production expenses and lead to a most economically plausible method of manufacturing or, if need be, give reasons for going back to purchasing the part from the current supplier.
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Fairhurst, Charles. "Contribution a l'amelioration de l'abattage mecanique de roches agressives : le pic assiste et le pic vibrant." Paris, ENMP, 1987. http://www.theses.fr/1987ENMP0111.
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Etude bibliographique, theorique et experimentale (experiences du cerchar et du v. S. Bureau of mines, minneapolis) de deux techniques: abattage assiste au jet d'eau, et abattage par vibration forcee (la premiere seule apparait prometteuse)
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Malát, Jan. "Technicko-ekonomické porovnání nekonvenčních technologií AWJ a LBM z hlediska potřeb firmy." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2011. http://www.nusl.cz/ntk/nusl-229944.
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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.
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Kubín, Matěj. "Obrábění těžkoobrobitelných materiálů pomocí vodního paprsku s abrazivem." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-402519.
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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.
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Kohoutek, Petr. "Konstrukce univerzálního zařízení na dělení pneumatik." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2009. http://www.nusl.cz/ntk/nusl-228579.
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The main content of of this thesis is a construction design and analysis of a machine for cutting tires. The resulting solution emerges from the design options and the option that meets the best selection criteria is chosen. Then the thesis stops for a while at the choice of cutting technology and tries to exemine its suitability for cutting tires. In its other part there is an attempt to clarify the relevant parts of the machine, where the benefits of three-dimensional views is used. Basic design and check calculations are done in the selected machine parts.
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Palazzo, Vittorio. "Progettazione e studio tecnologico di un sistema di sterzo per applicazioni sportive." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2022. http://amslaurea.unibo.it/25471/.
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This study has been done in order to design and realize the first version of the steering system for a race car, the Corbellati Missile.
The main objective of this thesis is the development of a repeatable and parameterizable calculation procedure according to the manufacturing costraints. The methods shown were used in order to limit the waste of time and money in the prototyping phase, decreasing the tested number of components and exploiting the potential of FEA based on the experimental know how of the Corbellati company. The designed steering system is a rack and pinion system in a Panhard configuration, enterily realized using CNC machine and Abrasive Water Jet cutting. Contrary to the usual construction of the steering boxes, due to the manufacturing constraint, it was opted for a steering box consisting of several elements connected by threaded joints
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Pecháček, Martin. "Hodnocení kvality povrchu při řezání u technologie AWJ a WJM." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2010. http://www.nusl.cz/ntk/nusl-228934.
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This study deals with technology of abrasive water jet material cutting and influence of cutting head feed rate on surface topography of cut walls with regards to roughness. Eight parameters were chosen based on the CSN EN ISO 4288 standard representing quality of surface after AWJ cutting. When AWJ cutting the chosen material – commercially pure ASTM B265 grade 2 titanium – feed rate was being changed and in order to obtain information about each parameter´s distribution in various depths of the cut, surface composition was evaluated. It was found out that feed rate has significant influence on surface and that the profile elements´ width grows when increasing the feed rate and cut depth. Furthermore, two selected feed rate results were compared to laser beam technology and conclusion for the selected material was made that AWJ cutting is more preferable due to final roughness and no heat affect on the material.
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Chao, Yen-Chang, and 趙晏樟. "Submerged abrasive water jet cutting of pipe." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/67546698712215918898.
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Bartley, Jonathan Thomas. "Applied theoretical studies of water jet penetrations and cutting." 1996. http://hdl.handle.net/1993/19098.
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Fenn, Orrie. "The use of water jets to enhance the performance of free rolling cutters in hard rock." Thesis, 2015. http://hdl.handle.net/10210/13419.
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D.Ing.The research described in this thesis is an investigation into fundamental aspects of the mechanical excavation of hard rock using free rolling cutters, currently being undertaken at the Chamber of Mines of South Africa Research Organization. The motivation for undertaking this study was provided by the need to improve the effectiveness and operational efficiency of this type of tool with regards to its application in the South African gold mining industry. Earlier work has shown that the use of high-pressure water jets enhances the performance of mechanical cutting in hard rock. To assess the potential of this approach for use in conjunction with free rolling cutters, a series of laboratory tests was conducted using both disc and button type cutters, to determine the relative effects, on cutter performance, of variations in the relevant jet and cutting parameters. The parameters investigated were jet pressure, jet configuration, depth and spacing of cuts and cutting speed. Jets of diameter 1,2 mm were used singly and in combination of 2 and 4 jets at pressures in the range of 5 MPa to 40 MPa which gave flow rates of up to 0,3 lis per jet. Cut spacing, cut depth and cutting speed were varied between 15 mm and 90 mm, 2 mm and 6 mm, and 0,1 mls and 1,0 mls respectively. Tests were carried out on a linear rock cutting machine, purpose built according to specifications prepared from measurements made during underground field trials, which gave it the ability to test full-scale cutters under loading conditions representative of those found in the field. All the tests carried out were performed in the constant penetration, multiple pass (groove deepening) cutting mode, using dressed (smooth) and pre-conditioned (pre-roughened) rock surfaces.