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Design and optimization of a headstock for machine tools
Lekeš, Petr ; Marek, Jiří (referee) ; Hermanský, Dominik (advisor)
This diploma thesis deals with the design and optimization of a headstock for machine tool. Thesis was focused to comparison of several types of slide-ways and linear guides of headstock, considering their static and dynamic rigidity. An overview in the field of machine tools, their static and dynamic properties, use materials and design of headstocks, considering types of guideways, types of guideways drives and types of drives of spindle was made. Among the other main goals is included design of several types of guideway of headstock for horizontal machine tool, elaboration of computational models and evaluation of results.
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Evaluation of the rail pad stiffness
Šardická, Klára ; Pazdera, Luboš (referee) ; Smutný, Jaroslav (advisor)
Rail pads are part of baseplate and baseplateless fastening system. It is a flexible element that is used primarily to reduce the negative effects of dynamic stress, reduce noise and vibration. This thesis deals with laboratory measurement of low-frequency dynamic stiffness at 5 Hz, static stiffness according to ČSN and static stiffness according to OTP of rail pads. The aim is to carry out and evaluate the measurements of samples supplied by different manufacturers and to compare them according to the variance of the resulting stiffnesses. Evaluate the stiffness of used rubber pads and compare with the results of new samples. Further, this thesis deals with the factors that the measurement itself and its results could influence.
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Comparison of machine tool structures from traditional and non-traditional materials
Tichý, Antonín ; Hermanský, Dominik (referee) ; Merenus, Ondřej (advisor)
The topic of this diploma thesis is compare materials in machine tool structures. The introduction part is about literature retrieval in field of constructional components in machine frames. There are discribe the indiviual parts of machine structures their properties and influence, witch affect their static toughness, stabilty and accuracy of the whole milling machine. The most important part is focused to the materials witch constructions of machine are made from. The main of this thesis is a practical part, where is designed the own model of milling machine solved on the basis of experiences gain. The important choose was appropriate topology and materials witch the machine frame was made.
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Description of machine tool frames.
Míčka, Martin ; Matějka, Petr (referee) ; Blecha, Petr (advisor)
This work describes the machine tool frames via background research. There are basic requirements for the frames included in this work. It is focusing especially on static and dynamic rigidity. Thereinafter you can find in my work all the ways of making the frames and also the materials which are used during their production. Last but not least I am presenting some examples of constructions single parts of the frame and all the ways of their attachment to the ground.
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Evaluation of static stiffness measurements of rail pads
Toman, Radim ; Dubský, Vladimír (referee) ; Hruzíková, Miroslava (advisor)
Rail pads are a part of rail fastening and have an important role for track strain. The main observed characteristics are a static stiffness and a dynamic stiffness of rail pad. At the moment there are two standards for determining static stiffness - the national document General technical conditions (Obecné technické podmínky - OTP) and the european norm ČSN EN 13 146-9. However, the metodology of static stiffness measuring is different. It means different values of rail pads static stiffness. In the OTP there are required values of static stiffneses for baseplate and baseplateless rail fastening. These requirements can't be applied on the static stiffness set by ČSN EN due to different measurement methodology. The aim of this thesis is to measure static stiffness of rail pads according to both methodologies and to check relation between the methodologies. The thesis proceeds from requirements of Správa železniční dopravní cesty - the national organization.
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Design and optimization of a headstock for machine tools
Lekeš, Petr ; Marek, Jiří (referee) ; Hermanský, Dominik (advisor)
This diploma thesis deals with the design and optimization of a headstock for machine tool. Thesis was focused to comparison of several types of slide-ways and linear guides of headstock, considering their static and dynamic rigidity. An overview in the field of machine tools, their static and dynamic properties, use materials and design of headstocks, considering types of guideways, types of guideways drives and types of drives of spindle was made. Among the other main goals is included design of several types of guideway of headstock for horizontal machine tool, elaboration of computational models and evaluation of results.
|
|
|
Comparison of machine tool structures from traditional and non-traditional materials
Tichý, Antonín ; Hermanský, Dominik (referee) ; Merenus, Ondřej (advisor)
The topic of this diploma thesis is compare materials in machine tool structures. The introduction part is about literature retrieval in field of constructional components in machine frames. There are discribe the indiviual parts of machine structures their properties and influence, witch affect their static toughness, stabilty and accuracy of the whole milling machine. The most important part is focused to the materials witch constructions of machine are made from. The main of this thesis is a practical part, where is designed the own model of milling machine solved on the basis of experiences gain. The important choose was appropriate topology and materials witch the machine frame was made.
|
|
|
Evaluation of the rail pad stiffness
Šardická, Klára ; Pazdera, Luboš (referee) ; Smutný, Jaroslav (advisor)
Rail pads are part of baseplate and baseplateless fastening system. It is a flexible element that is used primarily to reduce the negative effects of dynamic stress, reduce noise and vibration. This thesis deals with laboratory measurement of low-frequency dynamic stiffness at 5 Hz, static stiffness according to ČSN and static stiffness according to OTP of rail pads. The aim is to carry out and evaluate the measurements of samples supplied by different manufacturers and to compare them according to the variance of the resulting stiffnesses. Evaluate the stiffness of used rubber pads and compare with the results of new samples. Further, this thesis deals with the factors that the measurement itself and its results could influence.
|
|
|
Evaluation of static stiffness measurements of rail pads
Toman, Radim ; Dubský, Vladimír (referee) ; Hruzíková, Miroslava (advisor)
Rail pads are a part of rail fastening and have an important role for track strain. The main observed characteristics are a static stiffness and a dynamic stiffness of rail pad. At the moment there are two standards for determining static stiffness - the national document General technical conditions (Obecné technické podmínky - OTP) and the european norm ČSN EN 13 146-9. However, the metodology of static stiffness measuring is different. It means different values of rail pads static stiffness. In the OTP there are required values of static stiffneses for baseplate and baseplateless rail fastening. These requirements can't be applied on the static stiffness set by ČSN EN due to different measurement methodology. The aim of this thesis is to measure static stiffness of rail pads according to both methodologies and to check relation between the methodologies. The thesis proceeds from requirements of Správa železniční dopravní cesty - the national organization.
|
|
|
Description of machine tool frames.
Míčka, Martin ; Matějka, Petr (referee) ; Blecha, Petr (advisor)
This work describes the machine tool frames via background research. There are basic requirements for the frames included in this work. It is focusing especially on static and dynamic rigidity. Thereinafter you can find in my work all the ways of making the frames and also the materials which are used during their production. Last but not least I am presenting some examples of constructions single parts of the frame and all the ways of their attachment to the ground.
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