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On The Analyse of High Productive Reaming Technology
Gashkova, Irina ; Slaný, Martin (referee) ; Píška, Miroslav (advisor)
Diplomová práce se zabývá analýzou technologie vysoceproduktivního vystružování. V rámci práce byly provedeny testy vystružování za různých technologických podmínek (vc=40, 60, 80, 100 m/min; f=0.2, 0.4, 0.6, 0.8 mm) na materiálu austenitické oceli DIN 1.4404 při použití vystružovací hlavicí MT3. Jednotlivé operace vystružování byly porovnány z hlediska parametrů jako tlačná síla, krouticí moment, výsledná drsnost obrobeného povrchu a dále z hlediska tvaru třísky. Následně byly vypočítány průměrné hodnoty a směrodatná odchylka naměřených parametrů. Dále bylo provedeno porovnání pomocí diagramů. Výsledky ukazují lepší kvalitu, nižší drsnost povrchu (Ra 0,37 µm) a méně zdeformovanou třísku při pomalejších řezných rychlostech (40 m/min) a menším posuvu na otáčku (0,2 mm). Výsledky také ukazují nárůst tlačné síly a krouticího momentu za uvedených technologických podmínek. Při zvyšující se řezné rychlosti vystružování tyto silové účinky klesají.
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Proposal of production technology for a machine part using a drilling jig
Havránek, Pavel ; Kalivoda, Milan (referee) ; Chladil, Josef (advisor)
The aim of this bachelor thesis is to characterize the selected component, to evaluate the technological design. Further the drilling jig is designed and economical assessment is done. The first part of the thesis deals with the technological assessment of the production of drilling parts and structures. This is followed by familiarization with the technologies used in drilling and component manufacturing. Next sections summarize the rules for the construction of the products and their division. Conclusion of the thesis is devoted to the economic assessment.
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New methods for inner rotary surfaces finishing
Kazdera, Tomáš ; Zemčík, Oskar (referee) ; Zemčík, Oskar (advisor)
Content of the text deals with the methods of finalizing the internal surfaces of revolution. The paper discussed the theory most widely used machining methods that are commonly used in engineering practice. For each methods, are given the tools achieved surface roughness and geometric tolerances. The instruments are assigned to the machine on which the finishing operations are undertaken.
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Effect of size impact on surface integrity while reaming with modern reaming head MT3
Rybařík, Jaroslav ; Kouřil, Karel (referee) ; Slaný, Martin (advisor)
The aim of this thesis is to design, implement and evaluate an experiment that verifies the influence the size effect on selected parameters of the surface integrity. For the experiment were used highly productive reaming head MT3 made by HAM-FINAL. Evaluation of the surface integrity was done in terms of the characteristics of the surface roughness, geometric tolerances and changes in microstructure. Furthermore, the influence of the depth of chips evaluated for changes in the feed force, cutting torque and changes in specific cutting energy. The theoretical part deals with the description of the size effect, characteristic reaming, surface integrity, preparation of material and identification of highly productive MT3 reaming head.
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Concept of reaming technology
Štěpánek, Martin ; Sedlák, Josef (referee) ; Kouřil, Karel (advisor)
The diploma thesis deals with the design of the hole-making technology for hydraulic components that are specific for its high requirements on size and shape accuracy. The aim of diploma thesis is to compare the productivity, efficiency and accuracy of reaming with two different reamers – the solid carbide reamer and the newly designed reamer that combines two cermets on cutting part of the tool. In the practical part, the data analyses and calculations were made. It was discovered that the newly designed tool brings economic benefits while the qualities of final hole are improving or remaining at the same level.
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DEVELOPMENT OF TOOLS WITH PCD, CVD LAYER AND CVD COATING FOR BORE FINISHING
Ćmiel, Milan ; Humár, Anton (referee) ; Kouřil, Karel (advisor)
The aim of the thesis is to design, conduct and assess an experiment seeking to look into the utility properties of recent tools manufactured by HAM-FINAL. The tools include polycrystalline diamond (PCD) and CVD diamond cutting edges. In the theoretical part, the attention is devoted to cutting materials with an emphasis on diamond materials, as well as to issues associated with the wearing of the cutting tools, requirements specified for precision of bores and tools used in the manufacture of precision bores. The paper further provides an overview of a selection of world’s leading manufacturers of PCD blanks, CVD diamond coatings, CVD diamond layers and reamers with PCD cutting edges.
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A new production of the shaped shaft "Hohlwelle".
Kundrát, Vladimír ; Kouřil, Karel (referee) ; Píška, Miroslav (advisor)
Diplomová práca je zameraná na riešenie aktuálneho a akutného problému výroby tvarovej hriadele “Hohlwelle” vo firme Vekastool. Tri návrhy riešenia boli sústredené na dokončovaciu operáciu diery 30 H7, z ktorých dva boli priamo odtestované vo firme. Jedna z nich bola návrh a realizácia nového vyvrtávacieho nástroja firmou Ham-Final , ktorá priniesla zníženie nákladov o dve tretiny.
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An Experimental Study of the Impact of Passive Forces of Cutting on a Machined Surface
Slaný, Martin ; Janáč, Alexander (referee) ; Bumbálek, Bohumil (referee) ; Píška, Miroslav (advisor)
This dissertation thesis focuses on the evaluation of modern machine tools, especially tools for finishing operations, with which the effect of the passive force components on the machining process is evaluated. The thesis will examine the analysis of creating chips and circumstances that accompany this process and substantially involve the formation of a new surface. The analysis of the process of the recording of the power load of the MT3 tool takes place in the experimental part of the thesis. MT3 is a reaming head intended for finishing holes at high cutting speeds (100-200 m.min-1) with removal of small cross section AD (0.024 mm2) chips. Particular attention is paid to the newly created profile from the surface after machining and evaluation of changes in geometry and loading of the cutting edge, which is significantly reflected in the establishment and the development of passive forces.
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Technological, economical and ecological aspects of mist lubrication
Tlapák, Michal ; Sedlák, Josef (referee) ; Píška, Miroslav (advisor)
The assessment of MQL technology application in reaming process was elaborated in this diploma work. The evaluation of energy intensity was carried out in terms of specific cutting force during reaming of austenitic stainless steel work piece by using HSS reamers. The comparison of economic costs in the case of the application of MQL technology in production was made. Confrontation of oil mist removal principles. At the conclusion the evaluation of ecological benefits for the environment and the positive influence on the working environment cleanness was defined.
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Integrity surface at reaming with modern reaming head MT3
Havlík, Luboš ; Plíšek, Jiří (referee) ; Kouřil, Karel (advisor)
The Masters thesis is focused on surface integrity at reaming with high productive reaming head MT3 made by HAM-FINAL. Theoretical part of thesis aims at analyse of the most frequently evalueted surface integrity parametrs and its possible influence on functional performance of machined components. Next theoretical parts are aimed at reaming process, reaming tools characteristics, detailed reaming head MT3 characteristics and its aplication in company Sauer Danfoss. The aim of experimetal part of thesis is surface integrity of holes reamed MT3 during its tool life evalation.
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