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Národní úložiště šedé literatury Nalezeno 3 záznamů.  Hledání trvalo 0.00 vteřin. 
Machining of hardened parts
 Heiserová, Sofia ; Sliwková, Petra (oponent) ; Polzer, Aleš (vedoucí práce)
The usage of quenched materials in industrial production leads to the application of hard machining. Higher requirements for machines and cutting tools are needed during hard machining than during conventional machining. Quenched materials carry problem of volume and geometric changes after quenching and after machining as well. It is necessary to think about volumetric compensation in advance, before quenching of the workpiece. An experiment is suggested for optimalisation of longitudinal turning of steels 42CrMo4 and 50CrMo4. Hard turning has notable benefits such as flexibility of cutting tools and elimination of coolants, which provides ecological benefits. However, the disadvantages are higher tool wear and high prices of tools.
Úplný záznam
A Proposal and Optimization of Cutting Conditions for Turning of a Cemented Workpiece
 Heiserová, Sofia ; Sedlák, Josef (oponent) ; Kouřil, Karel (vedoucí práce)
This final thesis is aimed at optimalisation of hard turning process of cemented workpiece. First part is focused on the study of factors of hard turning. In the second part the work deals with the proposal and conduction of experiments of new cutting parameters in chosen factory. The durability of cutting edges is monitored. This monitoring is based on the evolution of roughness of machined workpieces. Based on the data evaluation, the best cutting edge is selected and used for final optimalisation experiments. Production cost of operational section is calculated for each alternative of cutting parameters in the third part of the thesis. Possible savings were calculated based on the number of machined pieces per year for the cutting edge that was found to have the best results.
Úplný záznam
Machining of hardened parts
 Heiserová, Sofia ; Sliwková, Petra (oponent) ; Polzer, Aleš (vedoucí práce)
The usage of quenched materials in industrial production leads to the application of hard machining. Higher requirements for machines and cutting tools are needed during hard machining than during conventional machining. Quenched materials carry problem of volume and geometric changes after quenching and after machining as well. It is necessary to think about volumetric compensation in advance, before quenching of the workpiece. An experiment is suggested for optimalisation of longitudinal turning of steels 42CrMo4 and 50CrMo4. Hard turning has notable benefits such as flexibility of cutting tools and elimination of coolants, which provides ecological benefits. However, the disadvantages are higher tool wear and high prices of tools.
Úplný záznam

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