Příspěvek k obrábění korozivzdorných ocelí

Abstract

The presented thesis deals with the issue of milling stainless steels. The work evaluates the influence of high speed face milling on the quality of the machine surface and the size of the achieved cutting forces. The mail goal is experimental verification of suitably selected cutting parametres for machined samples of stainless steels, evaluation of individual components of cutting forces and surface roughness parametres after face milling application. In the theoretical part of the work is an analysis of the current state of the problematics in the form of research in the field of high-speed machining, milling, cutting forces and surface integrity. Furthermore, the historical development and definition of the terms HSC, chip cross-section analysis in face milling, distribution of stainless steels are described. The theoretical part also solves the cutting forces in the milling process and surface integrity. In the experimental part, there are chapters where the design of experimental activities, description of materials of test specimens, used cutting tools, and machining centers are described. The results from the experiments show the infuence of cutting parametres on the monitored roughness parametres Ra, Rz and individual components of cutting forces Ffn, Ff, Fp. The evaluated measured values of roughness parametres were compared with the theoretical calculated values Rat, Rzt. For the force ratios, structural equations were compiled from the values according to the dependence functions for two variables and the results of the cutting forces Fv were calculated. At the end of the work are summarized and evaluated the results obtained from experimental activities, with benefits for science, practice and other research. The recommended cutting conditions are determined, and the quality of the machined surface after face milling on the mentioned steel samples is evaluated.