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The utilization of elastomers in forming technologies
Knebl, Martin ; Císařová, Michaela (referee) ; Peterková, Eva (advisor)
The project developed within the bachelor study (branch B2339-00 Mechanical engineering) deals with creation of a review of technologies in the field of forming using elastomers to manufacture desired parts. On the basis of studying literature focused on forming problems the review of these special forming methods and their brief description were developed. Further, the project includes examples of forming machines currently using these methods and appropriate products. The data were obtained from internet sources.
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Utilization of Liquid in Forming Processes
Horňák, Matúš ; Podaný, Kamil (referee) ; Řiháček, Jan (advisor)
This diploma paper submits a literature retrieval of forming processes, which use liquid as a main or additional forming medium. These methods are used in practise in mass-produced complex components, mainly in automobile and aeronautic industry. They are perspective due to their variability, geometric accuracy and the ability to form components which cannot be made using conventional methods. The thesis introduces principles, submits specimen of units prepared by methods, such as hydro-mechanical pulling, Flexform or processual hydroforming, and evaluates their advantages and disadvantages.
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Sheet metal forming using liquid
Fries, Petr ; Císařová, Michaela (referee) ; Řiháček, Jan (advisor)
This work is focused on unconventional technology using liquid as forming medium. The thesis presents the principle of forming methods hydroforming and its variations, wheelon, Flexform, hydromechanical drawing and explosive forming with examples of parts produced individual methods. A comparison of their advantages and disadvantages with conventional production methods.
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Problems of critical wall narrowing in high pressure hydroforming
Drška, Jan ; Řiháček, Jan (referee) ; Lidmila, Zdeněk (advisor)
Bachelor's thesis deals with narrowing metal sheet wall by high-pressure-fluid forming technology on a practical example. This thesis is working on an issue from practice while using a non-standard problem solving method. Theoretical part outlines classical methods of hydroforming and the theories of sheet metal forming. Practical part consists of proposed solution and an elaborated simulation. Subsequently is described the ideal machine for hydroforming and technological procedure. Last part is devoted to technical and economical evaluation.
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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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Utilization of Hydroforming Technology to Create a Structured Surface of Solar Panel
Řiháček, Jan ; Mašek, Bohuslav (referee) ; Lidmila, Zdeněk (referee) ; Mrňa, Libor (advisor)
The doctoral thesis deals with utilization of hydroforming technology for manufacturing of a new type of solar absorber, which has directly flow meandering structure and a structured surface consisting of pyramidal elements. Austenitic stainless steel X5CrNi18-10 is used as a material for absorbers production. At the beginning of the thesis, a literary research is performed, which is focused on particular methods of hydroforming technology, their applicability for this problem, forming limits determination and usability of numerical simulation. Based on the literature study, the production technology was developed by using parallel hydroforming technology and it was optimized by using a numerical simulation in the ANSYS software. Hydroforming parameters for two variants of the structured surface with pyramidal cavities with apex angle of 90° and 60° were determined from the calculations and the material tests.
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The modern processes and technology of sheet metal parts forming
Řáda, Aleš ; Císařová, Michaela (referee) ; Dvořák, Milan (advisor)
This bachelor thesis contains the summary of methods for unconventional sheet metal forming and tube forming, especially in flexible tools. There are some technologies such as rubber pad forming, hydroforming, high-speed forming and hot forming presented. In next part of the work there are three hydroforming methods for tube components described: low-pressure, high-pressure and pressure-sequence hydroforming. Finally there is comparison of these technologies according to several aspects by available web sources.
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Part Manufacturing by Using Hydroforming and Its Optimization
Chrz, Jan ; Jopek, Miroslav (referee) ; Řiháček, Jan (advisor)
The thesis presents an analysis and optimization of the manufacturing process of a part using the technology of parallel hydroforming. Two circular blanks made of DC01 steel with a thickness of 1 mm serve as a semi-manufactured part. In one of the blanks, the supply of the forming medium is constructed using Flowdrill technology. Subsequently, the two blanks are laser welded together and then formed. Numerical simulation using PAM-STAMP software was used to analyse the manufacturing process. This analysis provided information on wall thinning, deformation size, critical points on the product and springback. The numerical simulation was verified on the basis of comparison with an experiment. The criterion for verification was the course of the thickness of the part. Based on the results of the simulation, an optimization is performed in the thesis. It consists in determining the minimum required pressure of the forming medium for pressing the part, particularly for different distances between the two formed sheets.
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The use of fluid medium in forming technologies
Tůma, Martin ; Dvořák, Milan (referee) ; Peterková, Eva (advisor)
The aim of this work is recognition manufactoring methods making use liquid like forming media and estimation measurment their usage in present. Making summary of all methods, which make use liquid for manufacturing components. Further are here introduced examples of parts, which are used in practice, method used at their manufacturing and comparing advantages and hadicap in comparasion with conventional methods.
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Hydroforming machine for non-ferrous material tubes
Ocelík, Jakub ; Holub, Michal (referee) ; Knoflíček, Radek (advisor)
Master`s thesis deals with unusual high-pressure-fluid forming technology – hydroforming. There are discussed factors, which are affecting forming process, and there are made conclusion of it for machine design process. There is also made an evaluation of tube hydroforming technology in nowadays. The objective of thesis is to design new forming machine for tube hydroforming and for use in bicycle frames design. The machine is to be determined for manufacturing series up to 1000 pieces. Based on calculations and discussion of hydroforming technology, the best design solution is chosen. Machine is designed as modular conception with pressure multiplication of forming fluid right in die cavity. There is no need to use high pressure pump for forming fluid, used in common machines for tube hydroforming. This leads to cost reduction and so the objective of thesis is accomplished.
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