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Utilization liquid in tubes shaping
Vilda, Dalibor ; Císařová, Michaela (referee) ; Podaný, Kamil (advisor)
This publication elaborates on work about technologies, which utilize liquid as forming media in tubes shaping. There is a description of methods like low-pressure, high-pressure and pressure-sequence hydroforming and radial expanding by a liquid. A part of the work is also evaluation of individual methods, their advantages and disadvantages and examples of use in a practice.
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Forming of thin-walled tubes
Baránek, Tomáš ; Peterková, Eva (referee) ; Podaný, Kamil (advisor)
This work brings a synopsis of technologies used in the process of thin-walled tubes forming as well as their evaluation. There are various forming methods applied in order to achieve a required shape e.g. tube bending, radial tube tripping and tube forming. The bending is done by several means e.g. collaring, reeling and pressing. In the pipe bending operation the tube may get deformed. Thus there might occur the following bending defects e.g. wall thinning, excessive flattening, wrinkles in the bend, tube suspension. At the radial tube tripping may occur local tube tapering or tube diameter attenuation. Tube forming is dividend into inlet, outlet and flattening.
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Active sensors for detecting instantaneous stress and strain values
Vychopeň, Petr ; Kandus, Bohumil (referee) ; Podaný, Kamil (advisor)
Sensors used in engineering are divided into different kind of groups. One of them are an active sensors, which include inductive, photoelectric, thermoelectric, pyroelectric and piezoelectric. Based on literary study there are introduced, on the first place, the basic concepts related to the general characteristics of sensors, their inclusion in the measuring process and then describes the basic division, each operating principles, dependence and characteristics, specific examples of the applications in technological process and finally their advantages and disadvantages.
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Production of filter cup
Míka, Tomáš ; Štroner, Marek (referee) ; Podaný, Kamil (advisor)
This work is concerned with the design of producing a filter cup made of material 17 240 (1.4301), 0,5 mm thick and the series 100 000 pcs/year, used in the lever of the espresso machine. The method of conventional deep drawing without wall thinning was chosen as the most suitable technology for the production of body cup. Utilizing calculations, an initial semi-product of circular shape with a diameter of 92 mm was determined. By means of technological and constructional calculations a single operation tool was designed, with the upper blank holder and knockout, which is intended for use with a double-acting press. Its functional parts are made of material 19 436. According to the calculated total force a double acting hydraulic press CTH 250 was chosen.
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Upsetting test and its importance for practice
Zapletalová, Martina ; Řiháček, Jan (referee) ; Podaný, Kamil (advisor)
This thesis was aimed at verifying the accuracy of the evaluation of upsetting test. Experiments were carried out on cylindrical samples of steel 16 231.3 with solid lubricant Delta 144. Comparing the output values that were recorded classical way through the liner recorder and amplifier at press CZR 600. The Results have been processed using measuring module and program made by company Dewesoft. Last trio of samples was tested by upsetting test in a universal machine ZD 40, which was connected to the control unit and the data was processed by M-TEST program. From the plotted working curves and curves deformational resistance can be concluded that a liner recorder and amplifier can be effectively innovated by measuring module and by program.
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Forming of titanium alloys
Bednařík, Josef ; Podaný, Kamil (referee) ; Lidmila, Zdeněk (advisor)
The work was focused on the forming of titanium and its alloys in order to verify the ductile properties of titanium alloy VT 3-1. Using the upsetting test performed on the CZR 600 press and processed in the Dewesoft application, the strengthening curves for compaction at temperatures ranging from 25 °C to 800 °C were compiled. Based on the performed experiments, the titanium alloy VT 3-1 can be recommended for forming only at higher temperatures. It is recommended to select 700 °C as the lowest forging temperature limit. The material when being upset at lower temperatures showed poor formability due to the strengthening of the material. The yield strength during upsetting at room temperature was measured to be 1 100,8 MPa. In contrast, at 800 °C it has a value of 321,7 MPa. Hardness was determined before and after the test as an additional measurement. After the test, the measurement was performed on the front of the sample and in section. At 700 °C and 800 °C, the hardness resulted in dynamic recrystallization, which resulted in a decrease in hardness. The highest hardness was recorded in the middle of the sample at all temperatures. This result confirmed the thesis that there is a band of the most intense deformation in the perpendicular and axial direction of the sample.
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Manufacturing possibilities in cold forming procesess
Trnka, Filip ; Podaný, Kamil (referee) ; Šlais, Miroslav (advisor)
This project is elaborated in the bachelor's degree field of engineering technology. The main objective of this work is the chosen technology for cold forming their valuation and illustrative examples of products manufactured as follows. There are presented examples of unconventional types of technologies and concludes with a brief overview of companies dealing with cold-forming, with examples of their products and their uses.
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A study of upsetting tests
Sedlák, Ondřej ; Šlais, Miroslav (referee) ; Podaný, Kamil (advisor)
SEDLÁK Ondej: A study of upsetting tests and their importance. This bachelor thesis has been written as part of the studies in the field of Mechanical Engineering (2301R016) under the aegis of the Institute of Manufacturing Technology of the Faculty of Mechanical Engineering at the Brno University of Technology. This work deals with the study on the subject of upsetting tests and their importance in the engineering practice. The aim of this literary study is to evaluate upsetting – compression tests, especially in steel materials that are most widely used in the field of engineering. Then the work focuses on the comparison of the various types of upsetting tests, workpieces and machines, and their advantages and disadvantages for the practical use are compared.
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Manufacturing of tubes by rolling
Šimůnek, Petr ; Řiháček, Jan (referee) ; Podaný, Kamil (advisor)
Thesis is focused on the analysis of various rolling methods used for production of seamless tubes. It is a literary study, which describes both methods for the production hollow thick-walled cylindrical billets, as well as methods for their processing into finished tubes. Comparison between them and practical use is also described. In the thesis are analysed the methods of production of hollow semifinished products by push rolling and cross rolling, e.g. Mannesmann and Stiefel methods. For the seamless tubes finishing various rolling methods are described, such as pilger mill, mandrel mill, plug mill, Assel mill, Diescher mill or pushing mill.
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