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Aplikace technických materiálů a tvrdokovů u štípacích břitů na přírodní kámen
Hejzlar, Samuel
The diploma thesis is focused an the field of stone splitting and especially the splitting tools of hydraulic splitting machines, a splitting knife, thanks to which the stone is split. The first part describes the base material used for knife splitting production. Both types of steel and cemented carbides are described below. Followed by introduction of stone splitting and methods of stone extraction. This part is closed by an overview of products made of splited stone. The experimental part deals with measurements, which was aimed on demonstraion of the impact on the used materials and on the lifetime of the splitting knife. Also on the influence of the knives edge and the quality of the final product. The characteristics of the stone, used in the measurements, were subjected to tests, which were carried out in the Hořice test facility and the results are ilustrated in the graphs. In the thesis is also described the operation of the Sumrakov quarry from where the measured tools are. Also stone splitting machines ,manufactured by Gestra CZ s.r.o., have been thoroughly analyzed.
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Optimalization of cutting process for machining of aluminium profile on CNC centre
Král, Ondřej ; Fiala, Zdeněk (referee) ; Jaroš, Aleš (advisor)
This master‘s thesis deals with the suggestion of suitable tools for milling aluminum alloys profiles for the construction of aperture fillings and their aplication to a CNC machining center for increasing the efficiency of the cutting process. The first part of the thesis is focused on the description of the company and the workplace of production of aluminum alloys constructions. The following pages contain description of standardized products, which are used to identify the test profile that is part of the experimental verification. Next part of this thesis is characteristic of aluminum alloys and tool materials suitable for their machining. Second part of this work contains an analysis of the current state, suggestion of new cutting tools and their application to the production proces. At the end of this thesis there is the technical-economic evaluation that deals with the time and economic savings of the applied design.
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Turning of main steels
Svoboda, Kryštof ; Slaný, Martin (referee) ; Jaroš, Aleš (advisor)
The main theme of the thesis deals with turning of main steels. The basic quantities, force load during turning and geometry of knife with splinter shape are explained in introduction part. Followed by brief overview of instrumental materials. For main steels there is perform an analysis of mechanical and physical properities, alloying elements and their application. In final part there is selection of several replaceable cutting inserts suitable for main steels.
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Production of gear wheels with using dividing head
Cicha, Tereza ; Slaný, Martin (referee) ; Jaroš, Aleš (advisor)
The aim of this work is to characterize the production of gear wheels with using dividing head and also to produce the gear wheel by this method. The theoretical part of the bachelor thesis contains an overview of the machining methods for the production of gears and their characteristics. Theoretical chapters also contain a detailed description of the the production of gear wheels with using dividing head and materials used for the production of single gear tooth cutters. The aim of the practical part is to design, calculate and produce the gear wheel with using dividing head. The conclusion of the thesis is the overall summary and evaluation of the calculated data.
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Production of gears by hobbing
Ivánek, Radim ; Kalivoda, Milan (referee) ; Jaroš, Aleš (advisor)
The aim of this study is to compare the manufacturing costs and times of a gear hobbing process. The theoretical part of the thesis is aimed to describe the gears hobbing manufacturing process, their characteristics and this way used processing materials. The practical part of the thesis is comparing the manufacturing gear hobbing costs and machining times using high-speed steel tools to sintered carbides tools in line manufacturing. This study evaluates and rationalizes all the found and calculated data.
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Production of gears by hobbing
Ivánek, Radim ; Kalivoda, Milan (referee) ; Jaroš, Aleš (advisor)
The aim of this study is to compare the manufacturing costs and times of a gear hobbing process. The theoretical part of the thesis is aimed to describe the gears hobbing manufacturing process, their characteristics and this way used processing materials. The practical part of the thesis is comparing the manufacturing gear hobbing costs and machining times using high-speed steel tools to sintered carbides tools in line manufacturing. This study evaluates and rationalizes all the found and calculated data.
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Influence of coatings on durability of cutting inserts during longitudinal turning
Balíček, Martin ; Sámelová, Vendula (referee) ; Jaroš, Aleš (advisor)
This thesis deals with the influence of deposited coatings for durability and tool wear during longitudinal turning of steel CSN 41 1600 (E335) and influence of wear and surface quality. The theoretical part is focused on characteristics of turning technology, application, manufacturing and methods of coating cemented carbide and tool wear. The experimental part of the thesis includes the evaluation of the measured values, a description of the material, used tools and machine tool. The values measured in the experiment imply that the most suitable of the tested tool inserts is WNMG 3-1-NF with applied coating TiAlN + TiN. Surface quality decreases with increasing wear of the tool.
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The durability of cutting inserts during face milling
Spáčil, Radek ; Slaný, Martin (referee) ; Jaroš, Aleš (advisor)
The bachelor thesis deals with the wear of cutting tools in the form of cutting inserts during face milling. The thesis is divided into two parts. The first part is a form of search which describes milling technology and also includes progressive milling method HFC. The next chapter describes the types of using cutting materials with greater emphasis on sintered carbides. The third chapter deals with the basic methods of coating. The experimental part of bachelor thesis gives a description of used material, tool, machine, and the experimental progress. The aim of the experiment was to compare the durability and to compile the action of forces for cutting inserts. The experiment has shown that the cutting force increases as wear level increases.
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Coated cemented carbides and their effective use
Pavlovský, Tomáš ; Dvořáček, Jan (referee) ; Humár, Anton (advisor)
This thesis deals with coated cemented carbides, which are used for the manufacture of cutting tools. The introductory section provides an overview of the most common tool materials. The main part focuses on the production of coated SK, coating methods, types and properties of coatings. The final section deals with coated cemented carbide product range in the world's leading producer of tools and tool materials, tools and recommended working conditions for their effective use.
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Cemented carbides and theirs effective use
Dembek, Jiří ; Sedlák, Josef (referee) ; Humár, Anton (advisor)
This diploma thesis is aimed on cutting tools made of cemented carbides. It characterizes marking, production and properties of non-coating and coating cemented carbides and describes the latest trends in coating. Target of this diploma thesis is comparison of assortment of two important world’s producers and one Czech producer in term of used productive technologies, products microstructure, coatings types, coatings methods and possibilities of their usage. Cutting data were evaluated and compared from obtained technical knowledge, which were recommended by chosen producers for effective turning application of their cutting tools. Recommended cutting speeds were found out for specific type of cutting material according to ISO, width depth of cut and for specific values of feeds per revolution.
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