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Weldig of the different type of steel by the Yb-YAG laser.
Kopecký, Lukáš ; Kubíček, Jaroslav (referee) ; Mrňa, Libor (advisor)
Diploma theses is focused on welding experiment of maraging steel by use Yb-YAG laser. Experimet is based on testing of combination steel 11321 and maraging steel. Domex420MC, Domex720MC a QSE380. In theoretical part there are described laser technology of welding, weld defect, maraging steel and inspection of welded joints. In experimental part there are porposed test and made mechanical test of weld as transverse tensile test, bend tests, Erichsen cupping test, Vickers hardness test and makroscopic and microscopic examination of welds. In conclusion there are analysis of the experiment results.
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Suitable lubricants for deep drawing of carbon steel plate
Poloch, Milan ; Císařová, Michaela (referee) ; Jopek, Miroslav (advisor)
The task of the diploma thesis is to design and manufacture a testing jig, which will then be used for experimental testing of lubricants for drawing stampings up to 4 mm thick. The drawn material is deep-drawn steel D04. Friction modeling between the traction edge and the retainer was used for a real simulation of the production process. The shaped traction edge was constructed on the basis of a real part. A total of 6 types of lubricants were tested, of which one lubricant in the form of a paste was selected as the reference. The other lubricants were then compared with the reference value of the measured maximum tensile force. The aim was to ensure a lubricant in a consistency other than paste. Of the oil lubricants we received, none of the lubricants approached the optimum values.
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Suitable lubricants for deep drawing of carbon steel plate
Poloch, Milan ; Císařová, Michaela (referee) ; Jopek, Miroslav (advisor)
The task of the diploma thesis is to design and manufacture a testing jig, which will then be used for experimental testing of lubricants for drawing stampings up to 4 mm thick. The drawn material is deep-drawn steel D04. Friction modeling between the traction edge and the retainer was used for a real simulation of the production process. The shaped traction edge was constructed on the basis of a real part. A total of 6 types of lubricants were tested, of which one lubricant in the form of a paste was selected as the reference. The other lubricants were then compared with the reference value of the measured maximum tensile force. The aim was to ensure a lubricant in a consistency other than paste. Of the oil lubricants we received, none of the lubricants approached the optimum values.
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Weldig of the different type of steel by the Yb-YAG laser.
Kopecký, Lukáš ; Kubíček, Jaroslav (referee) ; Mrňa, Libor (advisor)
Diploma theses is focused on welding experiment of maraging steel by use Yb-YAG laser. Experimet is based on testing of combination steel 11321 and maraging steel. Domex420MC, Domex720MC a QSE380. In theoretical part there are described laser technology of welding, weld defect, maraging steel and inspection of welded joints. In experimental part there are porposed test and made mechanical test of weld as transverse tensile test, bend tests, Erichsen cupping test, Vickers hardness test and makroscopic and microscopic examination of welds. In conclusion there are analysis of the experiment results.
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