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Equipment for the production of paper pellets
HEJHAL, Lukáš
The introduction and the theoretical part define basic concepts related to briquettes, pellets, crushing, shredding and pressing. Subsequent chapters describe crushing and pressing system in general. The practical part describes the design of crushing and pressing machines. In the experimental part, the methodology of the experiment and the obtained results are presented.
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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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Manufacturing of metal yoke of electrical socket by compound tool
Svozilová, Lucie ; Řiháček, Jan (referee) ; Peterková, Eva (advisor)
The project elaborated design of technology production of the metal yoke of electrical socket made of steel DX51D + Z200 by compound progressive tool. Stock material for series of 200 000 pieces is a strip of coil. Manufacturing is realised in five steps consist of cutting, bending and flanging. For flanging was constructed a special mechanism for whose is necessary to use hydraulic counterholder, which is sold as a special peripheral equipment of manufacturing machine. The machine choice was adapted to this criterium. The servopress DSF-N1-800A was chosen as a manufacturing machine, which is made by AIDA company. The press can produce force of 800 kN and make work of 4000 J. Selling price of a one yoke is 24,5 Kč when the profit is one hundred percent. The break-even point comes with 58 140 made piece.
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Pressure losses in heating systems
Švanda, Martin ; Horká, Lucie (referee) ; Počinková, Marcela (advisor)
This diploma thesis deals with pressure losses in heating systems. The diploma thesis is divided into three sections. The first part is theoretical and deals with the occurrence of pressure losses. It discusses the properties of the fluid that affect pressure losses. It also deals with hydrodynamic phenomena, flow distribution, pressure loss distribution and its calculations. The aim of the second part, which is practical, was to create a heating project for a selected object. The object is a two-floor kindergarten building located in Velké Němčice. For this project, two heating variants were created. For the first variant, radiators and heating benches were designed and for the second variant, underfloor heating was installed in the building. The goal was to use a source which will gain heat mainly from renewable sources, so the air / water heat pump was chosen as the source of heat production. The project ends with a technical report. The third part of the thesis is dedicated to an experiment which purpose was to find out how the pressure losses of the connecting pieces are reacting to the change with the change of the heating water conditions (flow, temperature). Alongside, two pipes were created which differed in the type of connecting pieces so it allowed to compare how their pressure losses differ. Both pipes were connected by radial pressing, but the fittings differed in the quality of the brass, and therefore in the construction. Also, part of the experimental section of the diploma thesis is a description of the course of radial pressing of fittings from the Herz company.
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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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Current use of grain and oil crops for feeding of farm animals
JURA, Dominik
Cereals are an important source of nitrogenous substances and energy in the form of starch. They also contain, to a lesser extent, antinutritional substances such as alkyl resorcinols, non-starch carbohydrates, phytic acid and others. For the feeding of farm animals, they are processed and treated mainly by extrusion, pressing, drying and the like. Legumes are a source of crude protein. They are widely used, both for hard, mature seeds and for harvesting green matter. They can often fully replace oilseeds in compound feed and are an essential component of compound feed. Oilseeds are a valuable component of compound feed. They are mainly characterized by high fat content. Waste from the industrial processing of oil seeds produces pressed pieces or extracted scrap, which are widely used as components of feed mixtures. These components have, in addition to high fat content, high protein content.
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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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Production of a Printing Machine Waste Track
Dolák, Martin ; Žák, Ladislav (referee) ; Řiháček, Jan (advisor)
Řešenou součástí je část kanálu pro odpadové odstřižky tiskařského stroje. Relativně jednoduchá součást vhodná k výrobě tvářením za studena. Diplomová práce navrhuje zhotovení komponenty lisováním. Po shrnutí základních teorií dále navrhuje varianty výroby. Pro vybranou sestavuje technologický postup a navrhuje kroky tváření. Návazně odvozuje návrh konstrukce postupového nástroje. V neposlední řadě se věnuje ekonomickému vyhodnocení výroby, ročnímu výrobnímu množství a vypočítává bod zvratu pro dané řešení.
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