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Design apparatus for measuring geometric accuracy of machine tools
Holcman, David ; Marek, Tomáš (referee) ; Holub, Michal (advisor)
This bachelor’s work deals with modern methods of geometric accuracy measurement of machine tools, modal analysis and definition of demands on used agents during the measurement process. A part of this work is dedicated to description of numerical finite element method, which is the cornerstone of ascertaining the natural frequencies by a software program. In the closing part the appropriate adjustments of minimisation of influence on measurement are suggested.
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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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Prediction of Selected Parameters of Rotational Kinematics Pairs of Machine Tools
Marek, Tomáš ; Šooš, Ĺubomír (referee) ; Kolář, Petr (referee) ; Blecha, Petr (advisor)
The dissertation thesis is used as a methodology for prediction of selected parameters of rotational kinematic pairs of machine tools. The motivation for its writing has been continually increasing requirements for parameters (performance, accuracy, static and dynamic stiffness) of machine tools. The methodology takes into account the availability of suitable measuring devices and description of the design of rotary kinematic pairs. It will be useable for predicting the behavior of rotational kinematic pairs, even at the design stage by applying results to the machine design. The work is processed so that first is used a system approach to suggest methodology for prediction of the behavior of rotary kinematic pair in CNC machine tools, planning measurement strategy and verifying the results, including applications for specific kinematic chain of the selected machine. Based on this system approach and the resulting methodology, the measurement of the rotary kinematic pair was performed. The results of the system approach and measurement are generalized in the form of recommendations for designers of machining centers, allowing to increase the accuracy of the rotational kinematic pair.
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Root cause analysis of scrap during production of bearing rings in a roller bearing company
Studýnka, Pavel ; Marek, Tomáš (referee) ; Marek, Jiří (advisor)
This diploma thesis concerns about measuring of rings of bearings from the input material, throughout machining processes, such as turning, heat treatment, grinding, till finishing operations as honing. Purpose of this thesis is to map all the processes in a roller/needle bearing company, measuring of rings of bearings, evaluating data, propose actions leading to decrease the number of scrap product and technical-economical evaluation of changed processes.
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Software support of teaching of cryptography protocols
Marek, Tomáš ; Lambertová, Petra (referee) ; Burda, Karel (advisor)
Document contains informations about authentication, encryption, data integrity and data authenticity. Next part includes description of well know cryptography protocols, their functions and also their weaknesses. All of these acquired informations were used in concept and final software support for teaching of cryptography protocols, which is able to run on clasic web-browser. Thats why the application was designed as web PHP pages using JavaScript and AJAX, which ensures plaform and OS architecture independency. Besides the descripted and ilustrated part of application there are also interactive parts and animations. The last period contains description of education software and its functions. Source code can be found on the appended CD.
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Utilisation of innovative materials at design of bohring machines
Tobolka, Ondřej ; Marek, Tomáš (referee) ; Marek, Jiří (advisor)
Thesis solves an issue of application unconventional materials used in horizontal boring machine design. Chosen problem is solved step by step from general selection of suitable material for supporting structure. The selected material is applicated on WFT 13 CNC machine design from production of Fermat and it is created 9 conceptual options of machine’s frame. Finite element method is used for analysis of conceptual options. Based on data from analyses, the best option is selected for constructional part with use of multi-criteria PATTERN method. Constructional part of thesis elaborates on the design of selected conceptual option and gives recommendation for essential processes used in development and production of sandwich structures. The master’s thesis comes with new construction solution for supporting structure of selected machine and especially insight in development and production of new unconventional materials in horizontal boring machines design.
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Rotary drive system for living tool
Matyáš, Ondřej ; Marek, Jiří (referee) ; Marek, Tomáš (advisor)
The work shows us the basic division of the rotary náhonové system of CNC machines. The first part of the work of this thesis refers to the fundamental distribution of the Rotational náhonové system, i.e. tool and workpiece. Another part is the distribution according to the method of drive, the rotary actuator and directly driven.
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The new concept of maintenance and operation of manufacturing technologies
Klus, Jakub ; Marek, Tomáš (referee) ; Marek, Jiří (advisor)
This diploma thesis deals with a new concept of maintenance and operation of production technologies, where spare parts are manufactured using rapid prototyping methods. The options are compared with currently used methods. Furthermore, methodological recommendations are written on how to proceed with the application. The aim of the work is to evaluate the concept and confirm the theoretical assumptions on a case study.
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Positioning of the tilting head of a milling multi-purpose machining center with a horizontal spindle axis
Grepl, Martin ; Marek, Tomáš (referee) ; Marek, Jiří (advisor)
The thesis deals with the positioning of the tilting head of the multifunctional milling centre in three axis. The aim of the thesis is to design a multifunctional milling machine centre with a horizontal axis of the spindle in cooperation with Bc. Ľubomír Vazovan, Bc. Ján Rapčan a Bc. Tomáš Hynšt, who are working on the issues of the headstock, automatic tool change and palletization. The thesis also contains proposals of certain options and their subsequent evaluation by the multicriterial method PATTERN. The resulting construction is complemented by calculations of the main construction nodes.
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