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Design of a portable machine for machining large diameter pipes
Boháč, Josef ; Pavlík, Jan (referee) ; Tůma, Jiří (advisor)
This diploma thesis deals with the design of a portable machine for machining large diameter pipes. This thesis is divided into research, calculation, design, and construction parts. The introductory part is devoted to research in the field of joining large diameter pipes, with a focus on flanged and welded joints. Based on the findings from the research part, several construction solutions were considered. In the next part, the most suitable design solution was selected using a multicriteria analysis technique and subsequently elaborated on in detail. The following chapter deals with the calculation of maximal cutting forces and the selection of motor. An air motor was chosen as the most suitable option for the proposed machine. This part is followed by the computational part, which includes strength calculations for the critical parts of the machine. The final part of the thesis is devoted to the construction itself and the description of the individual construction nodes of the machine. The thesis also includes a 3D model, drawings of selected parts, and an assembly drawing.
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Construction design of woodworking machinery for preparing sawn timber
Závodný, Tomáš ; Tůma, Jiří (referee) ; Šubrt, Kamil (advisor)
This thesis deals primary with design of a woodworking machine focused on woodworking technology by cutting – rip saw. The introduction to the work is get to acquainted with the material to be processed – wood, and also the search of associated machines with the same technology of workpiece processing. Next part is focused on the safety of machining on woodworking machines and the individual safety features that the machines must contain are also analyzed. From this survey, a saw model with all the necessary features is created. The conclusion of the thesis is devoted to the risk analysis of the proposed machinery and their reduction.
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Design of automatic clamping device for CNC milling machine
Jirásek, Jiří ; Holub, Michal (referee) ; Tůma, Jiří (advisor)
This work is focused on the design and construction of a device for automatic replacement of workpieces for CNC milling machines. The thesis contains research in the field of automatic replacement of workpieces. The design itself can be divided into two parts. The first part is the selection of a universal clamping platform and the design of a technological pallet. The second part is the design and construction of the clamping device. First, different design variants are proposed.. These variants are then evaluated by multi-criteria analysis, based on which the most suitable variant is chosen. This is followed by the selection of suitable components for the assembly of the universal clamping platform and the construction of the technological pallet. The main part of the work is the structural design of the pneumatic wedge vice, including the necessary calculations and design of individual components. The output is technical drawings of chosen components and a technical drawing and CAD model of the assembly.
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Design of NC vise with mechanical force increase
Tejkl, Jan ; Tůma, Zdeněk (referee) ; Tůma, Jiří (advisor)
This thesis deals with NC vise with mechanical force increase. It aims to design NC vise. It provides an overview of clamping of workpieces. Furthermore, the thesis contains necessary calculations to design of NC vise. It finds critical poins of construction, choice of materials for critical components and designs with CAD software.
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Design of small hydraulic press with "C" frame
Gregor, Radek ; Tůma, Jiří (referee) ; Pavlík, Jan (advisor)
The main goal of this bachelor thesis is construction of small hydraulic press with force of 200 kN. With that comes topics like calculations of hydraulic circuit and it‘s compilation and calculation of the frame with it‘s construction. With the help of those two main topics we will be able to assemble whole hydraulic press machine. After completion of calculations and simulations, arises technical documentation of the machine.
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A design of five axis machining chuck
Holec, Štěpán ; Štěpánek, Vojtěch (referee) ; Tůma, Jiří (advisor)
This thesis deals with construction for five-axis machining. Objective was to design self-centering vise for five-axis milling. Thesis then includes overwiew of five-axis clamping and selection of manufacturers these clamping jigs. Furthermore, it contains necessary calculations to design of self-centering vise and design in CAD software.
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Design of direct drive tool turret for CNC lathe
Mrkos, Jan ; Štěpánek, Vojtěch (referee) ; Tůma, Jiří (advisor)
The diploma thesis deals with the design of a direct drive tool turret, which serves as a tool magazine for a CNC lathe. In the introductory part of the work, a research was performed in the field of automatic tool change with a focus on tool turrets and their main structural units. The introductory research is followed by the main part of the work, which begins with the selection of appropriate design solutions, followed by a presentation of the tool turret design created in CAD software Autodesk Inventor 2021 and in the final part of thesis the key elements of the proposed design are verified by calculations.
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Design of sheet bender
Kazda, Tomáš ; Tůma, Jiří (referee) ; Pavlík, Jan (advisor)
This bachelor’s thesis deals with the design of a sheet metal bending machine, which is intended for home workshops, or common craft operations. The first part of the thesis contains a overview of similar machines, that are currently available in the shops. In the second part of the thesis was selected the most optimal design, which arose from the three conceptual designs. Each design was rated and on the basis of a multi-criteria analysis were selected the best one. Final design were processed to the 3D model, which have a technical calculations and technical drawings too. After this were made a economic calculations of a final design, including a comparison with a selected models from the research part of this thesis.
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