UPGRADATION IN GEOMETRY OF GROOVING TOOL INSERT AND DEVELOPMENT OF IMPROVED PROCESS USING SAME UPGRADED TOOL INSERT GEOMETRY RESULTING IN PROCESS TIME REDUCTION

摘要

The invention relates to an improved process on CNC lathe machine with an improved tool insert to reduce the process time for finish machining of bottom diameter of Blade grooves in rotor shaft of steam turbine, the process comprising: producing an liner with improved cutting geometry; selecting cutting parameters on the CNC machine corresponding to improved tool insert, wherein a CNC program is incorporated based on said improved cutting parameter to introduce optimum numbers of turning cuts per groove, the high cutting parameters constitute a cutting speed of 60-80 mm / mins, and a feed rate of 0.15-0.22 mm/revolution.