Vliv posuvové rychlosti na povrchová napětí při frézování kalených ocelí

Abstract

Thesis is focused on exploration the distribution stress and changes of these stress in the surface layer of the material, which was before machining hardened in the whole cross – section to a desired hardness. This prepared sample was mapped stress distribution after milling with different cutting conditions. Range of the cutting conditions was chosen in the limit values tool to achieve the effect of high speed machining. High – speed machining could have an affect on the stress distribution. It was also measured the roughness of machined surfaces as one of the factors of surface integrity. The aim of the thessis is to verify the possibility of wider use of HSM in practise with maximum use of power potentials cutting machines and tools. The theoretical part contains summary information about HSM, creation stress in subsurface layer of machined area and about measuring methods of these stress. Futher there are described the method of surface roughness parameters, as other parameter of surface integrity. In experimental part of thesis is explored the influence of different cutting parameters on selected parameters of surface integrity after machining. The subsurface stress and surface roughness of machined surface are evaluated in machined layer. Conclusion describes the results of experimental part of thesis and their benefit for science and practice. Conclusion contains recapitulation of results and recommendation for other research in HSM field.