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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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Suggestion of convenient technologies of production for submitted flat sheet metal part
Chaloupková, Lucie ; Podaný, Kamil (referee) ; Špaček, Jindřich (advisor)
The project is elaborated in frame of engineering studies branch 2303T002. The project is submitting suggestion of convenient technologies of production for submitted flat sheet metal part 11 375. There are proposed a number of variants of production method, namely: production on sequence shearing tool, production by means of plasma machine, laser machines and machines for watejets cutting. Particular part is designed for the production quantity of 380 000 pieces per year. Based on the literary study of the shear and calculations, there were designed shearing tool for given part. For this tool the press CDCH 3000 P was selected (producer HESSE+CO Maschinenfabrik GmbH), with nominal force 3 000 kN. In the work there are included necessary calculations for all variants including technological and economical evaluation.
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Unconventional Technology of Laser Cutting
Indra, Jaroslav ; Kalivoda, Milan (referee) ; Osička, Karel (advisor)
The thesis deals with the technology of laser cutting. The beginning is concerned with a general description of laser technology and laser division into basic groups. Next part refers to possible industrial use of laser beam, especially for cutting. Other chapters deal with the components suitable for the manufacture of this technology, technical preparation of production and the proposal to increase manufacturing flexibility when changing products. The last part is devoted to technical and economic evaluation.
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Laser cutting with air pressure assistance
Kramoliš, Lukáš ; Hála, Michal (referee) ; Mrňa, Libor (advisor)
This project, elaborated within the engineering studies (code of field of study: N2301), deal with air supported laser cutting and its practical usage in industry. The project is divided into theoretical and experimental sections, consisting of detailed description of several successive steps of the experiment. The theoretical section describes the principle and function of laser, individual types of lasers and their classification, laser beam properties, laser cutting, etc. The practical part is focused on finding of a set of optimal cutting parameters, assessment of results of air supported laser cutting in terms of quality and accuracy of cutting surface. This part is followed by comparison of cutting surfaces with a conventional technology of laser cutting that uses oxygen and nitrogen. Final part of the project evaluates applicability of this unconventional technology from the economic point of view.
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Trends of development LASER technology
Zlesák, Jakub ; Kalivoda, Milan (referee) ; Osička, Karel (advisor)
The basic acquaintance with laser technology principles. The consideration and evaluation of this technology present state in engineering. The possibilities of applying new knowledge and discoveries in this field for using in engineering. The estimation of laser technology development within further 5 years and consideration of this technology economical demands.
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Unstability cut of laser beam at dividing limiting gauge thickness
Kadlec, Zdeněk ; Kalivoda, Milan (referee) ; Osička, Karel (advisor)
This thesis deals with the possibilities of cutting strong steel metal sheets by means of laser and problems rising from the incision, their technological investigation. The basic philosophy consists on the research of the interaction between laser bunch and material, depending on the position of focal poin and sequential results in spec. heat. It determines the main parametres of the incision (from the total quantities and matematical description) which have the biggest effect on the occurence of wide cut and perhaps even on the quality of products and consequential optimalization of these quantities.
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Machines for unconventional methods of machining
Zelený, Radek ; Osička, Karel (referee) ; Kalivoda, Milan (advisor)
This thesis is based on machines for unconventional machining, focusing on laser machining. The beginning of this work is summarized by what are unconventional machining methods that fall into this category and are then described along with their advantages and disadvantages The next section is focusing on laser machining. This chapter deals with machines used for laser machining parts that are convenient for a laser machine, but there is described a process itself that brings a lot of problems, advantages and disadvantages compared to other methods of machining. Finally, various technologies are compared for their suitability and use.
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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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