MODULAR DRILLING TOOL AND METHOD OF ITS PRODUCTION Russian patent published in 2012 - IPC B23B51/00 

FIELD: process engineering.

SUBSTANCE: proposed tool comprise structural body with drilling module secured thereon. Note here that said structural body extends along its lengthwise axis, represents, in fact, a bow cylinder and has chip flute with outlet edge 8 extending there along. To improve chip removal, flute groove extends to outlet edge while flute groove wall section opposite the outlet edge extends along straight line so that, if seen from section perpendicular to body lengthwise axis, said flute groove is constricted by J-like wall and fillet is formed so that acute front angle results between tangential line to outlet edge flute groove and radial line tangent to groove bottom in fillet area. Proposed method comprises using milling cutter for making chip flute.

EFFECT: higher efficiency.

13 cl, 5 dwg