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The Filling of the Tubes
Pažítková, Monika ; Štroner, Marek (oponent) ; Peterková, Eva (vedoucí práce)
The thesis presents a research for the removal of defects in bending tubes. In the first part, it deals with the approximation of defects resulting from bending and their further description. In the second part, the individual defects for manual and machine bending are described. The largest part is focused on the most used method in machine-bending. These are the use of mandrels, which have the highest position in the modern technology and the best results of the bent parts.
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Friction in forming proceses
Pažítková, Monika ; Dvořák, Milan (oponent) ; Lidmila, Zdeněk (vedoucí práce)
This thesis deals with tests of forming operations, which are used to determine coefficient of friction. In the theoretical part of thesis, the individual tests are described in details, with the greatest emphasis on the upsetting test. In the experimental part of thesis was perform upsetting test on the cylindrical and ring samples. Coefficient of friction of the cylindrical samples was determined by a calculation method and ring samples were evaluated using diagram of calibration. The thesis includes comparison of the result received on lubricant and unlubricated samples and method for determined coefficient of friction. Graphite Delta 144 was used as a lubricant. This result show that the lubricant has a positive effect on forming process.
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Friction in forming proceses
Pažítková, Monika ; Dvořák, Milan (oponent) ; Lidmila, Zdeněk (vedoucí práce)
This thesis deals with tests of forming operations, which are used to determine coefficient of friction. In the theoretical part of thesis, the individual tests are described in details, with the greatest emphasis on the upsetting test. In the experimental part of thesis was perform upsetting test on the cylindrical and ring samples. Coefficient of friction of the cylindrical samples was determined by a calculation method and ring samples were evaluated using diagram of calibration. The thesis includes comparison of the result received on lubricant and unlubricated samples and method for determined coefficient of friction. Graphite Delta 144 was used as a lubricant. This result show that the lubricant has a positive effect on forming process.
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|
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The Filling of the Tubes
Pažítková, Monika ; Štroner, Marek (oponent) ; Peterková, Eva (vedoucí práce)
The thesis presents a research for the removal of defects in bending tubes. In the first part, it deals with the approximation of defects resulting from bending and their further description. In the second part, the individual defects for manual and machine bending are described. The largest part is focused on the most used method in machine-bending. These are the use of mandrels, which have the highest position in the modern technology and the best results of the bent parts.
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