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Analysis of the surface after laser cutting
Narovec, David ; Sedlák, Josef (referee) ; Osička, Karel (advisor)
This diploma thesis discusses laser cutting and the consecutive surface treatment of cut parts. The theory of laser cutting is described in the first part of this thesis, including laser history and the laser emergence principle. Cut parameters and the influence of the laser cutting on the material are described later on. The next part describes the laser cutting technological possibilities and other laser technology utilization options are outlined. In the last theory part, metal surface treatment used in the experiment is covered. Coating thickness is evaluated in the practical part of this thesis, as well as roughness, microhardness, chemical microanalysis and metalography. The evaluation of the results achieved, and optimal surface treatment execution suggestions are addressed in the last part of this thesis.
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Measurement of cutting edge roughness in the process of laser metal cutting using the Yb-YAG laser
Maňas, Petr ; Hála, Michal (referee) ; Mrňa, Libor (advisor)
The project elaborated in frame of bachelor´s degree program B-STG (“Mechanical Engineering Technology”, 2303R002), evaluates the roughness of samples of cutting edge laser cutting. Cutting performed the fiber Yb:YAG laser. The samples consisted of structural steel J235JR and DC01, stainless steel X5CrNi18-10 and aluminium alloys AIMg3. They were evaluated according to the ČSN EN ISO 9013 standard. The classification of samples into classes according to the standards of accuracy. The theoretical part is consists of a description of the methods of cutting, a basic principle of the laser and its types. It includes cutting parameters and their influence on the quality of subsequent defects. It is described roughness measurement and standard ČSN EN ISO 9013.
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Use of laser machines for metal cutting technology
Novák, Petr ; Osička, Karel (referee) ; Kalivoda, Milan (advisor)
This bachelor thesis deals with laser cutting technology and its use in industry. A large part of the work consists of theoretical research, dealing with the characteristics of individual types of laser machines and their use for industrial applications, especially for metal cutting. Furthermore, the work is focused on the theory of this technology and suitable materials. The work also deals with two companies, which represent typical use of a laser machine. In the experimental part of this thesis the manufacturing process of component is created based on a survey of the use of laser machines.
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New trends of material cutting
Uttendorfská, Magdalena ; Špaček, Jindřich (referee) ; Peterková, Eva (advisor)
The thesis is focused on formation of a survey of modern methods of semi-product division in the area of forming technology. The first part of the thesis deals with material division conventional methods as cutting-off, clipping, refracting, cutting and sawing. These methods have already reached their utilization maximum. Their perfection is possible to be made e.g. by means of modern cutting materials. The next part is concentrated on material division special methods (oxygen cutting, laser, plasma and cutting by water jet) with presentation of their brief description. These methods have recorded the technology move ahead.
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Analisys of the material for laser cutting
Tonkovič, Miroslav ; Kolář, Ladislav (referee) ; Osička, Karel (advisor)
This thesis deals with laser cutting of metal sheets from selected steel producers. The basics of laser technologies, especially in industrial use, are described in the introductory part. There the material requirements are described from the point of view of laser cutting. The comparison of materials from different steel producers is made from different angles in the practical part. The conclusion is dedicated to the evaluation of achieved results.
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A laser beam in engineering
Šustr, Michal ; Kalivoda, Milan (referee) ; Osička, Karel (advisor)
The bachelor thesis focuses on the use of laser beam in the conditions of contemporary engineering, especially in cutting. Emphasis is put on the current technological possibilities of laser in industry, which are described in more detail. Cutting, welding, marking, surface cleaning and hardening, 3D metal printing and surfacing, all using laser beam, is mentioned in the bachelor thesis. The conclusion of the thesis is devoted to the productivity of work with the capacity of the laser together with the balance of operating and maintenance costs.
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Optimization of laser fusion cutting of coated aluminum sheets
Pokorák, Milan ; Hála, Michal (referee) ; Mrňa, Libor (advisor)
The thesis primarily deals with the optimization of laser cutting center for coated aluminium sheet cutting and with the subsequent comparison of measured results and a sample made using waterjet cutting. The thesis is divided in two parts, the theoretical part followed by the practical one. The theoretical section is concerned with the unconventional technologies used, with their general analysis, design, history and utilization for industrial appliances. Main parts of this thesis deals with classification of particular cutting principles and their specific description. The theoretical part contains also classificaton of aluminium alloy, description of surface texture measurement and explanation of basics terms used for roughness measurement. The practical section is concerned with the particular task solution and with all knowledge used for optimization and evaluation of laser cutting. This part contains the measurement results, the measured material, the machines and devices used and also the technical and economical evaluation of this thesis content. The overall evaluation of the laser cutting optimization of specific component is mentioned in the experiment outcome evaluation article.
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Measurement of roughness of the laser cutting edge
Vaculka, Jakub ; Hála, Michal (referee) ; Mrňa, Libor (advisor)
This bachelor thesis elaborated as a part of branch 2307 engineering studies describes metal laser cutting and its industrial use. The thesis consists of theoretical part and experimental part. The theoretical part describes physical and constructive principle of industrial lasers, its individual types, advantages and use. The experimental part goes into results of common quality steel oxidizing cutting. The CO2 laser from TRUMPF company was used in this experiment. Cut defect appearance and final roughness of cutting edge were the subject of evaluation. The conclusion summarizes effect of material chemical composition and cutting proces parameters on cutting results.
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Connection of mistakes cut with cutting characteristics at laser cutting
Šťastný, Jan ; Mouralová, Kateřina (referee) ; Osička, Karel (advisor)
The project in first part deals with theoretical analysis of technological possibilities of method of dividing materials with laser, principal and function of laser, division of different types of lasers, properties of laser ray, laser cutting, cut defects etc. Experimental part is focused on analysis of used machines and equipment, finding of optimal cutting parameters during laser cutting, evaluation of samples and then analysis of problem with generation of step changes and analysis of other possibilities for optimizing of the cut.
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