Patent ID: 7780379
Filing Date: 2010-08-24
Classification: B23C,Y10T

Abstract:
1. A surfacing and contouring cutter, in particular for high-speed machining of parts made of composite material, the cutter comprising a body having at least a portion that is made of ceramic, the body extending along the axis of rotation of the cutter and comprising a cut end portion having teeth regularly spaced around the axis of the cutter and separated from one another by swarf grooves, each tooth comprising a front main cutting edge and a side secondary cutting edge, the main cutting edge being formed by an intersection between a main cutting face and a first main flank, and the secondary cutting edge being formed by an intersection between a secondary cutting face and a first secondary flank, the main cutting edge of each tooth being connected to the secondary cutting edge of the tooth via a corner, the corner being of convex rounded shape with a radius of curvature that is greater than about 1.5 mm, the cutter being characterized in that the secondary cutting angle between the secondary cutting face of each tooth and a first reference plane containing the axis of rotation of the cutter and a point under consideration of the secondary cutting edge of the tooth lies in the range about 5° to 15°, said cutting angle being measured in a first working plane perpendicular to the axis of rotation of the cutter and containing the point under consideration of the secondary cutting edge of the tooth, and in that the swarf grooves are formed by front flutes between the teeth, the bottom of each of these flutes being connected to a main cutting face of the tooth by a line that forms an angle lying in the range about 15° to 25° relative to a working plane perpendicular to the axis of the cutter, said angle being measured in a reference plane containing the axis of the cutter.