Search

The goal of the submitted paper is to evaluate the dependence of tool life T = f(vc) in hard rough face milling process of the Armox 500 steel through the PVD coated cemented carbide cutting material with SNHF 1204EN-SR-M1 tool insert geometry. Practical tests of choice material were performed in the milling machine tool with vertical axis. The effect of applied cutting conditions on the surface finish, tool life, wear of cutting tool, such as flank wear and surface structure of applied cutting inserts, was investigated during the performed experiments. The goal of this article is to research the impact of various cutting speeds values during the process of hard face rough milling. Experiments are carried out with an aim to study tool life, surface finish and flank wear prediction on the PVD coated cemented carbide cutting material in hard milling processes. This has been observed through the REM and mathematical method of least squares for this characterization. The presented approach and acquired results will prove themselves helpful in understanding the machinability of Armox 500 steel during the hard milling process.

Članak se bavi problemima nadzora procesa rezanja u stvarnom vremenu. Usmjeren je na trošenje alata pomoću otpornih slojeva primjenjenih na keramičkim pločicama. U eksperimentalnom dijelu postupak rezanja se prati pomoću mjerenja električnog otpora. Rezultati su uspoređeni i verificirani pomoću mjerenja temperature rezanja i trošenja alata. Ispitivanje impedancijskih slojeva je prihvatljivo uglavnom za dijagnostiku rezne oštrice. Širina tog sloja određuje dodatak zbog trošenja (trošenje stražnje površine). Pretjerano trošenje uzrokuje značajno smanjenje tog sloja, a time i značajan porast električnog otpora, što je znak upozorenja na kraj trajnosti rezne oštrice., The article deals with problems of cutting process monitoring in real time. It is focused on tool wear by means of impedance layers applied on ceramic cutting inserts. In the experimental part the cutting process is monitored using electrical resistance measurement. The results are compared and verified using the monitored cutting temperature and tool wear. The testing of impedance layers is reasonable mainly for cutting edge diagnostics. The width of this layer determines the wear allowance of tool wear (flank wear). Excessive wear causes a sharp reduction of this layer and thus a sharp increase in electrical resistance, which is a warning signal of the end of the cutting edge durability.