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Analysis of kinematics of a ball screw mechanism
Sladký, Adam ; Marek, Jiří (referee) ; Hermanský, Dominik (advisor)
This thesis describes the process of creating a mathematical model of the kinematics of a ball screw, based upon which a computational model was made, along with an intractive Matlab user interface that serves to provide fast analysis of some of the most important parameters of the mechanism. Functionality of the presented model was verified using specific ball screw parameters. The output of this analysis was presented, analysed, and results describing the influence of operating conditions on the mechanism were derived from it. These results are one of the outputs of this thesis. Both the mathematical and computational models can serve as a tool for ball screw designers and manufacturers, and not only in their current state. They can also provide a starting point for anyone that requires a kinematic analysis for a specific configuration or problem.
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Ball screw testing
Kukliš, Richard ; Jaroš, Aleš (referee) ; Fiala, Zdeněk (advisor)
The main goal was to design a test rig and create a methodology for evaluating the measured data from the life tests of linear motion systems with ball screws. The first part is the research of basic knowledge about ball screws, which are important for understanding the behavior of the entire ball screw motion system and methods created from previous experiments on similar issues. The next part of the thesis is directed at the design and selection of individual parts and sensors for the testing rig. The methodology is based on the evaluation of measured parameters describing the condition of the tested ball screw and it includes verification of the functionality of the test rig from the first measured data.
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Design of CNC Milling Machine for Woodworking
Drda, Ondřej ; Zemčík, Oskar (referee) ; Slaný, Martin (advisor)
The thesis deals with the design of a CNC milling machine. The thesis includes a research of machines available on the market and a research of components suitable for the construction of the milling machine. In the next part, the calculation of motors, ball screws and linear guides was carried out. The work includes a complete 3D model and drawing documentation.
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Design of a two-axis multi-spindle lathe carriage
Sedlář, Jiří ; Štěpánek, Vojtěch (referee) ; Hadraba, Petr (advisor)
This diploma thesis deals with the design of a two-axis multi-spindle lathe carriage. In the first part, there is made a research, and its aim is to find possible variants of design solutions. After the best rated variant was selected, the thesis further continues with the necessary technical calculations of the main design nodes such as a synchronous servomotor, ball screw, linear guide and bearing. The design itself was carried out with regard to calculations and the resulting model was examined in terms of dynamic stability. The subject of examination was to find the natural frequencies of the assembly and to determine the amplitudes of the oscillations which arise from the harmonic excitation force. Finally, Lobe diagrams for grooving and longitudinal turning operations were drawn.
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Machining of hardened parts
Havlík, Daniel ; Osička, Karel (referee) ; Polzer, Aleš (advisor)
This bachelor thesis is focused on the machining of hardened parts. The beginning of the work is devoted to the analysis of specific materials, 42CrMo4, 42CrMoS4 and 50CrMo4. Next described thing is heat treatment. The main part of this work consists of theoretical analysis turning of hardened parts and theoretical analysis of the thread whirling of ball screw, where the principle of ball screws is also described.
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Design of small hobby CNC milling machine with fixed table
Hanzal, Jiří ; Marek, Tomáš (referee) ; Pavlík, Jan (advisor)
The topic of this work is the design of a small model CNC milling machine with a fixed table for machining wood, plastic, or light alloys (Al, Zn, etc.). It also includes a calculation report and drawing documentation of selected nodes. The beginning of this work consists of an introduction to the issue of milling machines, their distribution and subsequent market analysis. Subsequently, the input parameters are designed on the basis of market analysis and in the last part there is a calculation report, the design of the milling machine itself and a short economic evaluation.
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Design of linear axis for heavy machine tool
Kubálek, Petr ; Marek, Jiří (referee) ; Hermanský, Dominik (advisor)
This diploma thesis deals with the design of the linear axis of a heavy machine tool. It describes the basic specifications of these machines, their manufacturers, the parts of which the axis consists and the design itself. The design includes several design variants, calculation of the movement mechanism, drive and linear guide. Follows the selection of the most suitable variant and the drawing documentation of the resulting linear axis.
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