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Possibilities of the Tensile Test
Nevřivý, David ; Harant, Martin (referee) ; Řiháček, Jan (advisor)
The Bachelor’s thesis deals with the possibilities of tensile testing, the parameters of the test specimens, testing machines and the equipment which can be used in this test. Based on the literature review, the thesis explains the test principle, the measurement process and the strain and stress characteristics detected by the test. The thesis then focuses on the test specimens, their geometry, the method of their sampling and gripping into the machine. When describing the machines and equipment used in tensile testing, the thesis explains the functionality of these and their different types. The work also covers special types of tensile tests, namely those using elevated temperature, high-speed deformation, and cyclic or multiaxial stress. The final part of the thesis examines the current trend of evaluating the tensile test using 3D optical measurement systems
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Damascus steel production
Gajdošík, Matej ; Harant, Martin (referee) ; Podaný, Kamil (advisor)
Bachelor thesis deals with production of Damascus steel. Literary pursuit deals with methods of production, with closer elaboration of free forging technology, suitable material properties and work procedures during forging and etched specimen preparation. In the practical part of the work, production of two forged pieces consisting of 15n20, 80CrV2 and 1095 steels was documented. Subsequently an etched specimen was prepared to assess the success of the experiment. Finally, a knife was made from the selected forged piece.
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Production of sunshade's part
Obořil, Filip ; Harant, Martin (referee) ; Císařová, Michaela (advisor)
The work deals with the design of the manufacturing technology for the lateral covering fabrication of the sunshade. The part will be made of aluminium ČSN 42 4004 with thickness of 2mm. A manufacturing series comes to 100 000 per year. Some different manufacturing technologies were analyzed and the most suitable of them - the technology of fine-blanking with pushed edge was chosen. It was chosen the vertical laying of components on a sheet of aluminium roll. For production the servomechanical press XFT 1500 speed from FEINTOOL company was selected. In conclusion, economy of chosen manufacturing technology was evaluated.
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The options of production of holes at the tube wall
Vysloužil, Oldřich ; Harant, Martin (referee) ; Peterková, Eva (advisor)
The topic of the bachelor thesis deals with processing and forming of profiles (tubes). In the thesis, the most well-known methods of making a hole in the wall of the tube such as drilling, cutting and milling are introduced. The work is further supplemented by some of the unconventional methods such as Flowdrill, T-drill, or currently the most required machining today – laser cutting. Basic technology process is described for each method, as well as examples of tools and machines are presented. In the end, complete evaluation is presented in the form of an overview of advantages and disadvantages.
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Manufacturing of clip
Melezinek, František ; Harant, Martin (referee) ; Podaný, Kamil (advisor)
The thesis deals with technology of clip manufacture, used as connecting segment of clip frame. The molding is made out of 0,3 mm metal sheet and includes a number of bends and shaped cuts. Based on analysis of suitable production metods and size of series of 300 000 pieces per year, progressive combined tool was chosen as the best option. The part will be made in eight steps combining cutting and bending. For semi-finished product was used 53,4 mm wide roll of sheet metal. As material was choosen spring low alloy steel 51CrV4. Based on calculated force 43kN and work 15kJ the part will be produced on universal hydraulic press CUPS 6,3 DEU manufactured by HŠV stroje a.s.
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Production and processing of tubes
Rytíř, Martin ; Harant, Martin (referee) ; Podaný, Kamil (advisor)
This thesis presents the analysis of individual methods used in the production of seamless and seam steel pipes. It is a literature review that describes the essence of individual approaches to production, their comparison and use in the domestic market. In particular, it describes seamless tubes produced by centrifugal casting and a forming method which further divides them into rolling, pressing and drawing, and seams, made of sheets and strips, which are formed into a tube shape and welded by an appropriate method falling under the category of fusion or pressure welding.
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Manufacturing of a Component by Using Hydroforming Technology and Its Optimization
Harant, Martin ; Peterková, Eva (referee) ; Řiháček, Jan (advisor)
The project deals with analysis and optimization of the geometry of the stamped part produced by the pillow hydroforming. The blank consists of two sheets of steel DC01, which is welded by laser beam. The forming process can cause excessive thinning and cracking of the part. By evaluation of mechanical tests is created material model, which is the basis for numerical simulation created in software PAM-STAMP. The outputs are analysis which provide information about critical points, failure pressure, limiting deformations and prediction of springback. Validity of the numerical simulation is verified by comparison with the experimentally obtained data. The comparative criterions are the failure pressure and the material thickness at various locations. Based on the results of the numerical simulation, the optimization of the geometry is created. The optimization uses different values of radius at the crack point.
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Possibilities of Implementation of Selected Logistic Technologies and Methods in a Chosen Enterprise
HARANT, Martin
The correct use of modern technology in logistics is an important mean to strengthen the competitiveness on the market and to improve the overall quality of the logistic system. The bachelor thesis provides characteristics and an analysis of possibilities of application of selected logistic technologies and methods with a focus on material and information flows, possibilities of their application in the company Robert Bosch, spol. s.r.o., including an analysis of key factors for their successful implementation. The final evaluation also includes effects that the given method or technology has on the target dimensions. The thesis is based on a previous theoretical preparation and a study of literary sources. The theoretical background of the work is supplemented by a practical analysis and final evaluation of technologies that the author directly followed in the production plant. Furthermore, a structured interview with Robert Bosch's process expert was carried out, along with the suggested recommendation for possible improvements of a current situation.
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Importance of tensile test for numerical simulation
Harant, Martin ; Císařová, Michaela (referee) ; Řiháček, Jan (advisor)
The project deals with evaluation of the data obtained from the tensile test and creation of numerical simulation using the material model. Tensile test is an important tool for detecting mechanical properties of the material. Material properties are further used for structure and component designs, and for moulding processes analysis. Numerical simulation is used for gaining knowledge about these processes and deformation of components. Based on this knowledge, five samples made of steel ČSN 17 240 were tested on the ZD40 test machine. Data obtained by measuring had served as material model which was verified by simulation in ANSYS Workbench 16.
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