A rotary centrifugal machining of replaceable multi-faceted cutting tool inserts

Abstract

Background. The object of the research is replaceable multi-faceted carbide tool inserts with rounded cutting edges to increase their strength. The subject of the research is the operation of centrifugal-rotary processing for rounding the cutting edges of the plates and improving the quality of their working surfaces. The purpose of the research is to increase the productivity of the process and determine the rational modes without chips and chipping on the cutting edges of the plates. Materials and methods. The study of the processing was carried out using mathematical planning of experiments and statistical processing of the results using two-level fractional designs with a logarithmic transformation of the output parameters. Results. Empirical dependences of the influence on the radius of rounding of the cutting edges of the plates and the roughness of their working surfaces of the working chamber diameter of a centrifugal rotary machine, the rotor speed, the angle of sharpening of the cutting wedge of the plates, the duration of processing, the cutting ability of the abrasive filler and the applied process fluid are obtained. Conclusions. The research carried out made it possible to increase the productivity of the rounding process of cutting edges and the quality of the working surfaces of replaceable multi-faceted plates by using centrifugal-rotary machining. Rational processing modes have been determined, which exclude the appearance of defects in the form of chips and chipping of the cutting edges of the plates.

Keywords

• replaceable multifaceted inserts
• rounding of cutting edges
• centrifugal rotary machining
• centrifugal rotary machine
• rounding radius
• roughness of working surfaces
• rational processing modes