FIELD: metallurgy.
SUBSTANCE: railroad rail consists of head, web and foot. Profile of the rail head is formed with two (right and left) hyperbolic curves, or with three hyperbolic curves outlining correspondingly the right, left an middle part of profile. Each curve has one rectilinear generatrix at angle 
to its imaginary axis. The procedure for treatment of hyperbolic rails requires profile cutters equipped with replaceable multi-facet plates (RMP) with rectilinear cutting edge only. Said profile is formed with a concave generating line. Each line forms specified profile and it is created at rotation of the RMP with a rectilinear cutting edge arranged on a case of the tool along traces of one rectilinear generatrix of generating surface positioned at angle λ to its axis.
EFFECT: upgraded quality of treated surface, reduced vibrations of cutting process, raised degree of versatility of used cutters.
3 cl, 1 dwg
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