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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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Design of Kitchen Sink Production
Dvořák, Ondřej ; Císařová, Michaela (referee) ; Řiháček, Jan (advisor)
The work deals with the design of technology to produce a circular kitchen sink with a narrow flange around the perimeter. The semi-finished product is a 0.8 mm thick stainless-steel sheet X5CrNi18-10. The size of the production series is set at 200,000 pieces per year. Based on a literature search, the technology of deep drawing without thinning the wall was chosen for the production. Then was the sink examined in terms of technology and method of production, which included determining the number of draws, calculating forces and work during forming and other calculations necessary to design a drawing tool. The result shows that to produce the final shape is required two drawing operations with a blank holder and production will be carried out on a hydraulic press HARSLE Y27-200T with a nominal drawing force of 2000 kN. For the first and second operation a drawing tool was designed, for which was prepared the relevant technical documentation. The punch, the die and the blank holder are made of tool heat-treated steel 19 436.9 and they are fixed in welded bodies of common structural steel 11 373. Using the simulation of a drawing was subsequently verified the accuracy of technological calculations and the suitability of the selected method of production.
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Design of Kitchen Sink Production
Dvořák, Ondřej ; Císařová, Michaela (referee) ; Řiháček, Jan (advisor)
The work deals with the design of technology to produce a circular kitchen sink with a narrow flange around the perimeter. The semi-finished product is a 0.8 mm thick stainless-steel sheet X5CrNi18-10. The size of the production series is set at 200,000 pieces per year. Based on a literature search, the technology of deep drawing without thinning the wall was chosen for the production. Then was the sink examined in terms of technology and method of production, which included determining the number of draws, calculating forces and work during forming and other calculations necessary to design a drawing tool. The result shows that to produce the final shape is required two drawing operations with a blank holder and production will be carried out on a hydraulic press HARSLE Y27-200T with a nominal drawing force of 2000 kN. For the first and second operation a drawing tool was designed, for which was prepared the relevant technical documentation. The punch, the die and the blank holder are made of tool heat-treated steel 19 436.9 and they are fixed in welded bodies of common structural steel 11 373. Using the simulation of a drawing was subsequently verified the accuracy of technological calculations and the suitability of the selected method of production.
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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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Utilization of hydroforming technology to create a structured surface of solar panel
Řiháček, Jan ; 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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