|
|
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.
|
|
|
Design of an experimental manifold suitable for a 3D print manufacturing
Zeman, Stanislav ; Křivohlavý, Petr (referee) ; Vaverka, Ondřej (advisor)
The target of this thesis was to design a method of mounting pressure sensors on an already designed shape of a flow distribution header. Furthermore, it was necessary to design a method of mounting the header on a laboratory stand and then find a method of surface treatment. This thesis was solved in these three structural nodes. Gradually, three variants were designed for the threaded connection of the distributor and the pressure sensor and then three variants of installation were designed for the selected threaded connection. The possibilities of mounting a header on a laboratory stand were designed in two variants. Finally, possible methods of surface treatment have been proposed to improve the impermeability through the wall of the header. The individual variants in each design node were compared with each other by their strength and the result was the final design of the flow distribution header. It was manufactured according to the given technological procedure and then its functionality was tested.
|
|
|
Design of an experimental manifold suitable for a 3D print manufacturing
Zeman, Stanislav ; Křivohlavý, Petr (referee) ; Vaverka, Ondřej (advisor)
The target of this thesis was to design a method of mounting pressure sensors on an already designed shape of a flow distribution header. Furthermore, it was necessary to design a method of mounting the header on a laboratory stand and then find a method of surface treatment. This thesis was solved in these three structural nodes. Gradually, three variants were designed for the threaded connection of the distributor and the pressure sensor and then three variants of installation were designed for the selected threaded connection. The possibilities of mounting a header on a laboratory stand were designed in two variants. Finally, possible methods of surface treatment have been proposed to improve the impermeability through the wall of the header. The individual variants in each design node were compared with each other by their strength and the result was the final design of the flow distribution header. It was manufactured according to the given technological procedure and then its functionality was tested.
|
|
| |
guest ::
