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Design of portal milling machine
Kejda, Petr ; Tůma, Jiří (referee) ; Blecha, Petr (advisor)
The subject of this thesis is the construction of the portal milling machine. In the first part is the research of currently available gantry milling machines. The second part includes a proposal gantry milling machine and its basic parameters. Then there folllow basic calculations of components designed machines including design drives. The bachelor's thesis contains a 3D model and assembly drawings.
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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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Thermal effects in machine tools
Fikejsl, Ondřej ; Štěpánek, Vojtěch (referee) ; Hermanský, Dominik (advisor)
This bachelor’s thesis is specialized search dealing with thermal effects in machine tools and then their compensation. This work is divided into three main parts. First part explains the basic terms and temperature sensors that can be used to measure thermal errors. Second part deals with the thermal influences acting on machine tool, as well as the methods of their compensation. Last part analyzes the specific part of the machine tool including the examples from the manufacturers and their methods of preventing the above-mentioned thermal effects.
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Machine tools safety
Holczer, Aleš ; Blecha, Radim (referee) ; Blecha, Petr (advisor)
This thesis contains an overview of safety requirements and standarts by European Parliament and Council in field of machine tools. The other chapter is about harmonized standards of machine tools. Safety requirements are shown on chosen machine tool - radial drill.
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Machine tools safety
Böhm, Jakub ; Blecha, Radim (referee) ; Blecha, Petr (advisor)
This thesis contains an overview of safety requirements and standards by the European Par-liament and Council in the field of machine tools. The second chapter concerns harmonisati-on standards in the area of safety, its explanation and integration into the legal system. Safe-ty requirements are shown on EDM system.
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Method for Energy Efficience Simulation of Machine Tools in Design Stage
Tůma, Jiří ; Demeč, Peter (referee) ; Suchánek, Rostislav (referee) ; Blecha, Petr (advisor)
Ph.D. thesis is focused on the design of the method for simulation of energy demands of machine tool in operation at the stage of its development. Proposed method is developer on the basis of literature search in science and in industry. The method itself is composed of five related steps, that must be realised in the proper order in order to create a relevant energy profile of a machine tool. The output from the method are simulated data providing a course of comsumed energy and required power which are time dependent. Output data are obtained on the basis of the drive system simulation of machine tool through G-code, that is interpreted for simulation by the compiler into the matrix. It contains data necessary for controlling of machine tool, such as the required end points of the tool and required feed rates, to which is assigned a time value. G-code is partially time parametrized. It is then followed by full time parametrization through a of mathematical model of drive mechanisms and due the synergy of software for drive mechanisms control (Matlab Simulink) and software for physical simulation (MSC Adams) is processed into output data. As an input parameter figures also coefficient used as multiplier of the normal force of driving mechanisms, which is a function of feed rate. This loss function is obtained experimantally. In the context of Ph.D. thesis were conducted two experiments, used to verify the developed method. For each experiment is proceeded according to estabilished method and it is included a comparsion of simulation and measured data for various operating modes. The proposed method, described in the Ph.D. thesis, allows designers to summarize the energy demand of the proposed machine before its production. When correctly interpreted, the results of the method can serve as a basis for improving the energy profile and thereby increasing the energy efficiency of the machine tool.
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Economic comparison of manufacturing the machine parts on machine tools in the company Frentech Aerospace s.r.o
Novák, Lukáš ; Dvořáček, Jan (referee) ; Sedlák, Josef (advisor)
Bachelor thesis deals with economic assessment of three different methods of production a given part. Two methods of production are given by Frentech Aerospace s.r.o. The third method is designed to lower the final price of the component. Machines are selected from the offer of Mazak machines in the new manufacturing process. Developing of program for manufacturing workpiece on machine tools belongs to this thesis. The goal is to upgrade the existing method of production the specified component. Bachelor thesis is concluded technical-economic evaluation of all three alternates.
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Design of drilling arm for machine-tool
Štancl, Dominik ; Osička, Karel (referee) ; Kalivoda, Milan (advisor)
The thesis deals with the design and deformation analysis of the real construction, which is a complement to the machine tool. The introductory part is devoted to the theory of drilling technology and extension of machine tool possibilities for this method of machining. The next section contains the design of the drill arm and the subsequent analysis in ANSYS to verify that the structure fulfill the requirements. At the end, the effect of changing the dimensions of the arm on the resulting rigidity and its functionality is assessed.
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