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Design and optimization of a frame for a machine tool
Weigl, František ; Marek, Jiří (referee) ; Hermanský, Dominik (advisor)
This diploma thesis deals with the optimization of the machine tool bed. In the first part of the thesis, individual machine tools and their distribution are briefly described. The following is a description of the influences that affect the static and dynamic properties of the bed, a brief overview of the materials used in the production of machine tools and a short overview of optimization methods. The second part of the work focuses on the creation of a model of the bed, which is used for mathematical optimization using FEM in the ANSYS Workbench. This serves to find the optimal input parameters of the bed, which will improve the static and dynamic properties of the bed. The optimization continues with changing the topology of the bed and using alternative materials. The result of this work is four optimized models, which are compared with the original configuration.
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Design of milling machine spindle
Švarc, Marek ; Pavlík, Jan (referee) ; Blecha, Petr (advisor)
This bachelor's thesis deals with solving design of milling machine spindle. At first, the background research in milling machines and their spindles is processed. Here is adduced distribution of machines, basic description and examples from current manufacturers. In this part, there are described types of spindles and their basic parts. Second part of thesis is focused on technical calculations and design of the spindle based on defined parameters. An attachment includes assembly drawing, three main parts drawings and 3D model of spindle.
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Methods of Machine Tool Thermal Error Compensation
Hanzal, Jiří ; Hermanský, Dominik (referee) ; Minář, Petr (advisor)
Thermal error caused by the thermal deformation is one of the most significant factors influencing the accuracy of the machine tool. This paper presents an overview of the methods of measurement, regulation and compensation of thermal errors. It also deals with the research of research centers and their projects. At the end of the thesis we are dealing with measuring of temperature deviations on machine tools MCV 754 Quick. For the tested machine tool, a methodical proposal of temperature compensation was designed using the grey neural network model with convolution Integral. This paper aims to give a basic introduction of the whole process of the spindle thermal error compensation.
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Design of a rotary table for a machine tool
Axmann, Patrik ; Tůma, Jiří (referee) ; Blecha, Petr (advisor)
This bachelor thesis deals with the construction of a rotary table for a machine tool. The first part deals with the system analysis of the problems, namely the use of drives, gear mechanisms, bearings and measuring systems in the design. Subsequently, manufacturers and the creation of variants of design solutions. The second part of the thesis is focused on calculations and design of the chosen design variant.
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Technical improvements of the machine tool NAKAMURA – TOME
Novák, Tomáš ; Učeň, Oldřich (referee) ; Novotný, Lubomír (advisor)
The subject of this engineer´s thesis is a design proposal for technical upgrade of chosen CNC turning center design groups. The choice of design groups is based on user´s and author´s practical knowledge gained from machine´s workings. For each of these groups, there is a function description, actual state of design solution and problematic behaviour description. The follow up consists of given problems solving with more possible variations taken into consideration, including economic evaluation of chosen solution.
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Design of machine tool turntable
Rygl, Ondřej ; Opl, Miroslav (referee) ; Blecha, Petr (advisor)
This bachelor thesis deals with the design of a rotary table for a machine tool. In the first part are described main types of rotary tables, existing approaches being used in design of drives and options in applicating modern components for rotary tables currently available on the market. The purpose of the second part is to design a rotary table with a torque motor drive for application in a milling machine.
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Development And Verification Of A New Method For Measuring The Stiffness And Damping Properties Of Joints In Parallel Kinematic Structures
Kolouch, Martin ; Tomáš, Jiří (referee) ; Knoflíček, Radek (advisor)
In this dissertation is presented the development of a new measurement method for the stiffness and damping characteristics of a joint in a parallel kinematic machine tool. The main contribution of this method is specially for applications, that demand accurate information about stiffness and damping parameters from assembled parts of machines tool. Methods for compensation of deformations in machines tool, that are carried out by control, belong to these applications. Another contribution of this work is the technical implementation of the proposed principle of the new method. At this point the focus of the work was devoted to signal processing, that differs in a certain degree from other types of signal processing methods, that are used in other dynamic measurements, e.g. modal analysis. One of the main requirements was the possibility to consider the nonlinear behavior of the measured structure. In another chapter the modified signal processing method was used for measuring a joint in a test rig. The results were compared with results from other measurement methods. On account of this comparison the statement was made that the new method can be used for measuring the stiffness and damping parameters of machine parts. Finally the new method was applied to measure the properties of a joint, which was built in a machine tool. Moreover, the problems, that appeared during the measurement, were also described.
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