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Manufacturing of a Pin
Glatter, Jiří ; Forejt, Milan (referee) ; Řiháček, Jan (advisor)
The work presents a proposal for the technology of production of a pin of gear assambly.The pin is used to position the wheel in a tapered roller bearing. Pin is made of 11 320.3 steel (11 320 5R), which is suitable for cold forming. Based on the study of cold forming and calculations, the methods of upsetting and extrusion were chosen. Most often, several methods are used for fabrication, which are mediated by a combined tool. It can also be made by any of the machining methods.
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Reinforced concrete structure of a department store
Košík, Ondřej ; Požár, Michal (referee) ; Šulák, Pavel (advisor)
The bachelor thesis deals with the design and assessment of main parts of the carried reinforced concrete structure of a department store. The aim of the thesis was to design and evaluate the reinforced concrete structure of the ceiling slab, pillar, staircase and the wall. A graphical documentation of selected elements is also a part of the thesis. The calculation of internal forces was performed in a computational program SCIA Engineer 17, subsequently this calculation was verified by a manual method. The construction is designed according to the ČSN EN standards.
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Forming technology production of window hanger.
Štejnar, Radek ; Šlais, Miroslav (referee) ; Forejt, Milan (advisor)
An objective of the bachelor’s thesis is the solution of forming technology production of window hanger by means of backward extrusion and elaboration of study concerning cold bulk forming. Required component is made of material ČSN 41 1320 5R and rounded chock with dimension of 14,6h9 - 25,3 mm is selected as semifinished product for production. Generally 2 alternatives of technology process were assessed whereas technological and strength calculations are executed utilizing computing support of TVÁŘENÍ and OPTIM97 software. Component is produced within 4 operations including cutting of wire. Multi-stage cold forming press TPZK 25 made by ŠMERAL a.s. Brno producer was chosen for designed technology. Production tools are made of high speed tool steel 19830.
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Technology of extrusion
Cháma, Jakub ; Řiháček, Jan (referee) ; Podaný, Kamil (advisor)
This bachelor thesis is a literary study dealing with extrusion technology and is aimed to be used as a study material. There are described basic principles of technology, the division of methods, used materials, machines, tools and the area of usage. The main focus of this work is to depict advantages and disadvantages of extrusion technology and its application in practice, which is supported by the example of usage in one of the Czech companies called Vítkovice Cylinders.
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Ceiling slab over the corner windows
Tuchyňová, Andrea ; Zich, Miloš (referee) ; Strnad, Jiří (advisor)
This bachelor thesis concerns design of reinforced concrete ceiling slab with girder above the corner windows. The slab has rectangular floor plan with large opening in the middle. The slab is dimensioned to the ultimate limit state and serviceability limit state. The inner forces on the bar model were assessed by force method and were compared with inner forces on spatial model created in Scia Engineering programme.
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Bulk forming technology of carrier pin
Sejkora, Petr ; Samek, Radko (referee) ; Forejt, Milan (advisor)
Diploma thesis focus on the proposal of the carrier pin production from the steel 17 021 by cold bulk forming technology with sight on the upsetting and extrusion. There were suggested two versions of the technological plan from which was one chosen as optimal. There were carried out calculation of deformation, forming and deformation resistances and forming forces for the chosen version. Machine for the part TPM 12 production was chosen on the basis of the global forming force 660 kN. Furthermore there were proposed forming tools for the second operation – feed forward extrusion. Finally there was made technical and economical evaluation.
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Experimental comparison of filament produced from recycled and regular PET
Tomčová, Renata ; Vaverka, Ondřej (referee) ; Koutecký, Tomáš (advisor)
This bachelor thesis deals with the experimental comparison of filament made from recycled and common PET. Filament was made from commercial granulate of PET, PET-G and from recycled PET bottles. Sample pieces were printed using FDM technology from these filaments and then the sample pieces were tested using a tensile test. The sample pieces made from recycled PET filament had one third worse tensile strength than the sample pieces made from common PET and PET-G filaments. Thanks to this bachelor thesis it is possible to decide, if it is worthy producing filament from recycled PET bottles even at the cost of reducing the mechanical properties of final products.
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Evaluation of dimensional and shape accuracy of components made of plastic
Tuza, Marek ; Dobrocký, David (referee) ; Sedlák, Josef (advisor)
The aim of this thesis is to evaluate the dimensional and shape accuracy of components made of plastic. A total of 10 samples, produced by two types of production, extrusion and 3D printing using the FFF method, were used for this purpose. The semi-finished products were milled after production, which resulted in samples of the required dimensions. The samples were milled on one side without cooling emulsion and on the other side with cooling emulsion, which significantly affected the resulting shape accuracy values. Thus, a total of 20 surfaces were evaluated. Two parameters were selected to evaluate the dimensions, namely distance and parallelism. When measuring the shapes, 11 parameters were evaluated using a 2D roughness profile and a 3D surface texture. One of the most used parameters that was evaluated when measuring shapes was the arithmetic mean deviation of the roughness profile, which is denoted as Ra. The research found that the highest accuracies were measured for the material PA produced by 3D printing and milled with a cooling emulsion. At the end of the practical part, the author also makes recommendations regarding the practical use of materials.
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Manufacturing possibilities in cold forming procesess
Trnka, Filip ; Podaný, Kamil (referee) ; Šlais, Miroslav (advisor)
This project is elaborated in the bachelor's degree field of engineering technology. The main objective of this work is the chosen technology for cold forming their valuation and illustrative examples of products manufactured as follows. There are presented examples of unconventional types of technologies and concludes with a brief overview of companies dealing with cold-forming, with examples of their products and their uses.
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