TY JOUR TI SOME PROBLEMS OF CUTTING TOOL OPTIMIZATION APPLIED TO CNC THERMAL CUTTING MACHINES KW CNC thermal cutting machines KW CNC laser cutting machines KW cutting tool optimization KW cutting time KW cutting speed JO Bulletin of Belgorod State Technological University named after. V. G. Shukhov AU Tavaeva, A.F. AU Petunin, A.A. PY 2017 IS 2 PB Belgorod State Technological University named after V.G. Shukhov