Analysis and preparation of carbide cutting edges with drag finishing process

V diplomski nalogi smo analizirali pripravo karbidnih rezalnih robov s strojnim planetnim poliranjem oziroma s tako imenovanim procesom »drag finishing«. Podrobneje smo preučili mikrogeometrijo orodja in raziskali, kako posamezni parametri procesa »drag finishing« vplivajo na velikost zaokrožitve rezalnega robu. V praktičnem delu naloge smo izdelana rezilna orodja izpostavili različnim kombinacijam vplivnih parametrov, ki pri strojnem planetnem poliranju vplivajo na velikost radija rezalnega robu. S pomočjo opravljenih meritev smo ovrednotili rezultate in popisali vplive posameznih parametrov procesa. Ugotovili smo, da se s podaljševanjem časa poliranja velikost zaokrožitve povečuje, bolj intenzivno pa le do pete minute poliranja. Prav tako se zaokrožitev močneje povečuje pri uporabi grobega polirnega medija. S pomočjo raziskave smo tako, ob ustrezni izbiri vplivnih parametrov procesa priprave rezalnih robov, povečali produktivnost izdelave in obstojnost orodij.As part of the diploma thesis, we analyzed the preparation of carbide cutting edges with machine planetary polishing or the so-called "drag finishing" process. We studied the microgeometry of the tool in more detail and investigated how individual parameters of the "drag finishing" process affect the size of the rounding of the cutting edge. In the practical part of the task, we exposed the manufactured cutting tools to various combinations of influential parameters that affect the size of the cutting edge radius in machine planetary polishing. With the help of the performed measurements, we evaluated the results and described the influence of individual process parameters. We found that by increasing the polishing time, the size of the rounding increases, but it is more intense only up to the fifth minute of polishing. Also, the rounding increases more strongly when using a coarse polishing medium. With the help of research, we thus increased the productivity of production and the durability of the tools with the appropriate selection of the influencing parameters of the cutting edge preparation process