Patent ID: 6616387
Filing Date: 2003-09-09
Classification: B23B,B23C,Y10S,Y10T

Abstract:
A slot-drilling cutter (1) comprising:a tool body (2) having at least one first plate seat (5) and at least one second plate seat (6), said plate seats being substantially similar to each other and arranged symmetrically in respect to an axis of rotation (25) of the tool body (2), a first cutting plate (3) and second cutting plate (4), said cutting plates (3, 4) being substantially identical with each other, each having a base, lateral side faces, and a top surface (3a, 4a), which define a substantially straight end cutting edge (7, 8), a corner cutting edge (9, 11), and a substantially straight peripheral cutting edge (12, 14), said end cutting edges (7, 8), the corner cutting edges (9, 11) and peripheral cutting edges (12, 14) being similarly positioned in an axial direction (a) and radial direction (r), said top surfaces (3a, 4a) of the cutting plates (3, 4) being offset with respect to each other, said peripheral cutting edges (12, 14) of the cutting plates (3, 4) being arranged on a cylindrical surface (Z) which is concentric with the axis of rotation (25) and being effective for removing material at a bottom of a slot being drilled by the slot drilling cutter as an incident to lateral movement of the cutter in a direction perpendicular to the axis of rotation (25), said end cutting edges (7, 8) being arranged on a conical surface (K) recessed axially inwardly into an end of the cutter and being effective for removing material from an end of the slot being drilled by said slot-drilling cutter as an incident to movement of the cutter in a direction along the axis of rotation (25).