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Preheating of the base plate during WAAM production of magnesium alloy AZ61
Zeman, Stanislav ; Hutař, Pavel (referee) ; Slavíček, Jakub (advisor)
The aim of this thesis was to design and construct a heated table, which was subsequently used to verify the effect of preheating on parts made by WAAM technology using AZ61 magnesium alloy as filler wire. The effect of preheating in the range of 50°C-350°C on the basic geometry of the single-track weld was successively investigated. It has been shown that the effect of preheating reduces hight and widens the geometry of the single-track weld, while deepening the penetration. Based on this knowledge, an ideal preheating temperature of 200 °C was determined for the production of thin-walled specimens. Preheating stabilized the width of the layers in the thin-walled specimen and significantly increased its quality. Furthermore, preheating was used to reduce residual stress. Strain measurements showed up to 50% residual stress reduction within the thin-walled specimen. Finally, a suitable temperature range of 200°C - 250°C was determined for WAAM fabrication of AZ61 magnesium alloy.
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Robotic 3D printing simulation in SW PowerMill
Melich, Michal ; Vetiška, Jan (referee) ; Szabari, Mikuláš (advisor)
This thesis deals with the issue of simulating metal 3D printing using the WAAM technology with the use of an industrial robot. At the beginning of the thesis, elements and technologies currently implemented in robotic welding workplaces are introduced. The following section describes the creation of a simulation model of the robotic welding workplace in Powermill software and subsequent toolpath generation based on the selected part for manufacturing. The final part of the thesis is dedicated to the simulation of the created paths and subsequent analysis of the simulation results.
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Development of WAAM process parameters for thin-walled components made of magnesium alloy AZ61
Šváb, Čeněk ; Němeček, Stanislav (referee) ; Slavíček, Jakub (advisor)
The thesis deals with the development of WAAM (Wire Arc Additive Manufacturing) process parameters for thin-walled parts made of magnesium alloy AZ61. The aim of the thesis is to find suitable process parameters and describe their influences on the welding process. To achieve this goal, these parameters were experimentally tested. It was found that the parameter of boost phase current and the duration of its application have the highest influence on the weld geometry. The stability of the welding process was then influenced by the electrode feed rate during the boost and burn phases. Based on these results, a final set of parameters was created, which successfully welded a thin-walled part composed of 50 layers and reaching a height of 130 mm.
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3D metal printing
Vrána, Pavel ; Herčík, Tomáš (referee) ; Řiháček, Jan (advisor)
The work presents a literature search of current technologies for 3D metal printing. In the introduction, the individual methods are divided according to the forms of material into powder, wire, and string. The methods using metal powder are SLS, EBM, and DED. Other methods are ADAM, PMD, and WAAM. For each technology are described the principle, printable materials, usage, and example of the product. For methods using electric arc are described possible metal transfers and their limitations.
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Workability study 3D metal printing as technology for prototype plastic parts manufacturing
Kovář, Tomáš ; Herčík, Tomáš (referee) ; Sigmund, Marian (advisor)
This bachelor thesis is focused on the feasibility of metallic 3D printing. The 90MnCrV8 tool steel die is time consuming and expensive to manufacture by conventional methods. When considering the use of a die for a maximum of 50 pieces of moldings, it is possible to choose a material other than tool steel. From the offered possibilities of metal 3D printing, 2 suitable methods were selected, namely SLM and WAAM, where the WAAM method appears to be cheaper. Available materials for steel replacement 90MnCrV8 are metal wire G4Si1 for WAAM method and stainless steel X2CrNiMo17-12-2 for the SLM method. After listing all the options and evaluations, it can be seen that the feasibility of metallic 3D printing as a replacement for conventional tool production is possible.
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Development of WAAM process parameters for thin-walled components made of magnesium alloy AZ61
Šváb, Čeněk ; Němeček, Stanislav (referee) ; Slavíček, Jakub (advisor)
The thesis deals with the development of WAAM (Wire Arc Additive Manufacturing) process parameters for thin-walled parts made of magnesium alloy AZ61. The aim of the thesis is to find suitable process parameters and describe their influences on the welding process. To achieve this goal, these parameters were experimentally tested. It was found that the parameter of boost phase current and the duration of its application have the highest influence on the weld geometry. The stability of the welding process was then influenced by the electrode feed rate during the boost and burn phases. Based on these results, a final set of parameters was created, which successfully welded a thin-walled part composed of 50 layers and reaching a height of 130 mm.
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Workability study 3D metal printing as technology for prototype plastic parts manufacturing
Kovář, Tomáš ; Herčík, Tomáš (referee) ; Sigmund, Marian (advisor)
This bachelor thesis is focused on the feasibility of metallic 3D printing. The 90MnCrV8 tool steel die is time consuming and expensive to manufacture by conventional methods. When considering the use of a die for a maximum of 50 pieces of moldings, it is possible to choose a material other than tool steel. From the offered possibilities of metal 3D printing, 2 suitable methods were selected, namely SLM and WAAM, where the WAAM method appears to be cheaper. Available materials for steel replacement 90MnCrV8 are metal wire G4Si1 for WAAM method and stainless steel X2CrNiMo17-12-2 for the SLM method. After listing all the options and evaluations, it can be seen that the feasibility of metallic 3D printing as a replacement for conventional tool production is possible.
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3D metal printing
Vrána, Pavel ; Herčík, Tomáš (referee) ; Řiháček, Jan (advisor)
The work presents a literature search of current technologies for 3D metal printing. In the introduction, the individual methods are divided according to the forms of material into powder, wire, and string. The methods using metal powder are SLS, EBM, and DED. Other methods are ADAM, PMD, and WAAM. For each technology are described the principle, printable materials, usage, and example of the product. For methods using electric arc are described possible metal transfers and their limitations.
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