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Influence of anchor stamping process on the function of pressure control valve
Koumar, František ; Jopek, Miroslav (referee) ; Peterková, Eva (advisor)
The project elaborated a possible simplification of the tool which is used for stamping of the anchor of pressure control valve (PCV). PCV is manufactured at Bosch Diesel s.r.o. Jihlava. The resulting change will reduce the cost of tool production. Current tool can be manufactured only in one company in order to achieve precise dimensions. Based on the comparison of internal stamping, it obtains the dispersion of depths for further tests. Optimal a force is obtained from these tests, followed by limit sample tests. The tests show that modified tool is not suitable for stamping on the force for anchors with limited hardness. It is necessary to use a more suitable variant. A more suitable variant is stamping on the track. With this method, there will be less effect of the hardness of the anchor. The test on stamping on the track will be performed in the second half of 2020 and, if successfully validated, will be introduced into the series.
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Design of single-purpose machine for pressing bearings in pulleys
Roupec, Michal ; Továrek, David (referee) ; Bradáč, František (advisor)
Purpose of this thesis is to make constructional modification of single-purpose pressing machine for Huisman Konstrukce, s.r.o. company. Present machine is non-operational and not enough powerful for present requests of workshop. Intended modifications are to describe present condition of machine, find present requirements and design simple modifications. All modifications are checked by calculations and sketched in shop drawings. There were also made alternative options of modification to show machine more versatile and automatic.
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Materials Used for Cutting Tools for Metal Machining
Tomek, Lukáš ; Fiala, Zdeněk (referee) ; Kalivoda, Milan (advisor)
This thesis deals with cutting materials used for the production of inserts and tools for ma-chining. The aim of this thesis is to describe the various materials used in machining, their basic characteristics, composition and production. The work also includes a description of profiles of leading world producers of cutting tools. On the example of the designed shaft is made application of turning tools needed for its machining and short description of its production with a graphic demonstration. The final part is devoted to the evaluation of the turning in terms of used resources depending on the cost,productiontime and subsequent recycling of end-of-life instruments.
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Assessing the influence of tool warming on the mass production process
Chrz, Jan ; Císařová, Michaela (referee) ; Lidmila, Zdeněk (advisor)
The work introduces literary study, which is devoted to sheet forming. Particularly to technologies connected with problem of pressing – blanking, bending and drawing. Further it is aimed at mass production of mouldings complicated in shape, which is nowadays supported by computer technologies (simmulation of sheet forming process, kinematics of the line, burden of the tool) and on warming of the tool. Warming of sheet formoning tools is redominatly caused by friction between the tool and semiproduct. It decreases lifetime (longevity, operable life, usable life) and quality of the moulding. Warming could not be elimitated, but could be moderated by use of lubricant for friction decrease and tool cooling, slower production or use of tempered tool.
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Factors influencing the quality of red wine
Zechmeisterová, Lucie ; Vránová, Dana (referee) ; Omelková, Jiřina (advisor)
In my thesis, I focused on monitoring of microorganisms in the sample of red grape juice and on the interactions between yeasts, bacteria and filamentous fungi. Three different media were applied for the cultivation of microorganisms; firstly for monitoring of total volume of microorganisms, secondly for yeasts and third time for lactic acid bacteria. The indirect method was used for the determination of the amount of viable cells. This method consists in enumerating of visible macroscopic colonies grown up on agar plates. When the cells grew up, the forms of colonies were analyzed visually and the morphology of microorganisms was detected microscopically. The operating time of enzymes in grape juice in the production of red wine was monitored after application of commercial enzymatic preparation. The enzym action in grape juice was observed on the basis of the process of degradation of high – molecular substrate by enzymes through the use of Ubbelohd´s viscometer. The research findings provided a lot of knowledge about the occurance of microflora in the process of production of red wine. The commercial preparations added to grape juice played a significant role.
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Proposal to Reduce the Non-conformance Rate in the Manufacturing Process
Hamr, Zdeněk ; Lapeš, Ondřej (referee) ; Videcká, Zdeňka (advisor)
This bachelor´s thesis deals with a proposal to reduce the non-conformance rate in the manufacturing process. It contains three process optimization proposals to minimize scrap. The work is divided into three main parts. The first part is theoretical dealing with theoretical concepts. The second part contains a global and detailed analysis of production with identification of the main problems. The third part includes a design solution based on the analytical part.
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Lubricants for forming technologies
Tollrian, Zdeněk ; Císařová, Michaela (referee) ; Šlais, Miroslav (advisor)
This thesis deals with the lubricants used in metal forming technology. Requirements for lubricant, grease and selection process of forming the necessary information to determine the desired properties of the lubricant. The thesis presents an overview of lubricants that are used in various forming processes, their distribution and use. In each chapter the types of lubricants that are used in engineering practice.
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Production of wing rib
Ivančo, Radek ; Peterková, Eva (referee) ; Císařová, Michaela (advisor)
The thesis presents a proposal of production of a molded part from the aluminum alloy of group 2024 (dural). Based on the theoretical study and the requirements of the company was designed a cutting tool with a rounded edge for cutting the unfolded shape of the part on the eccentric press LEN 40 C. A new forming tool from textite material for fluid press Quintus QFC was designed. The parts of the cutting tool were designed primarily from normalized (purchased) parts. Manufactured punch and shearing die are made of commonly available tool steels and processed on the attached drawings. The result of the thesis is a recommendation to invest in a specialized workplace for the production of a unfolded shape and reduction of laboriousness adjusting after forming.
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Optimization of the process of pressing balls into the injector body
Kadlecová, Petra ; Frýza, Josef (referee) ; Brandejs, Jan (advisor)
This thesis is focused on a pressing station as a part of the assembly line in the Bosch Diesel plant in Jihlava. The station provides sealing of a hole in the injector body by ball pressing in. By using several tests the thesis finds out a reason of large amount of waste pieces, checks how can pressing-speed change or lubricant change infuence the pressing process itself and compares capabilities of hydrolic vs. electric pressing machine.
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Design of pressing machines for manifold assembly of condensers in car air-conditioning unit
Juriga, Jakub ; Pavlík, Jan (referee) ; Knoflíček, Radek (advisor)
The diploma thesis deals with the design of pressing machines for manifold assembly of condensers in the car air-conditioning unit. The problem of the current assembling process is its inefficiency. Semi-automated assembly using pneumatic pressing machines eliminates this problem. In the theoretical part the air-conditioning components, current state of assembly and calculating base of pressing are described. In the practical part the test of pressing force was conducted. Based on this test, the design of four pneumatic pressing machines was accomplished. In the final part of the work, evaluation of the whole project is provided.
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