DIAGNOSTICS OF ENGINEERING CUTTING SYSTEM USING CUTTING FORCE PARAMETERS

Abstract

The purpose of this work: the engineering process optimization of 09H17N7Yu steel turning at the expense of creating the procedure allowing the diagnostics of an engineering cutting system state on the results of cutting force control, inverse problem solution, that is, cutting force control according to the analysis results of system state diagnostics, the optimization of cutting mode parameters to ensure the required values of a cutting force, on the basis of the analysis results of a cutting force the tool materials and tool geometry should be recommended for cutter wear-resistance increase, the prediction of tool life at the expense of designing new tool materials and tool geometry for new conditions of their operation. There are presented recommendations to ensure a correct choice of carbide cutting inserts quality for the specified conditions of their operation. On the investigation results there are obtained conclusions: the most promising for special stainless steel 09H17N7Yu turning were tool materials: TC8+TiCN(mkm) + (TiAl)N(3mkm) + Al2O3(5mkm) + TiC(5mkm); TC8+Al2O3(2mkm) + (Ti)CN(5mkm) + (TiAl)N(3mkm) + TiN(3mkm); TC8 + (TiAl)N(3mkm) + Al2O3(3mkm) + (TiAl)N(3mkm) + Al2O3(3mkm); it is defined that at cutting mode forcing (cutting speed 60m/min, depth 2.5mm) or at turning titanium alloy TT-22 more complex in machining the mentioned tool materials met the demands made, that is, real insert life varied from the designed one not considerably (in the first case – 7% maximum, in the second one – 14%), that is the most acceptable. Work novelty: there is offered and substantiated a procedure for cutting force constituents use on the basis of simulation for the choice or design of tool material for turning in different conditions of tool operation.