Rotary cutting tool
AssigneeNiagara Cutter Inc.
InventorDennis L. Noland
Life of this patent
Estimating the term…
Abstract
A rotary cutting tool that includes an elongated tool body, rotatable along a longitudinal axis of rotation is disclosed. It has a fluted cutting end on one end and a shank end on the opposite end of the tool body. The fluted cutting end includes a nose, a periphery and an end surface that extends from the nose to the periphery. A plurality of axial flutes extends from the end surface to the fluted cutting end and combines with a plurality of cutting edges. The cutting edges are unequally spaced along the circumference of the end surface lying in a plane perpendicular to the longitudinal axis of rotation. In addition, all cutting edges are of a different helix from one another and the cutting edge geometries vary from one another to create a different sound pattern. This reduces resonant harmonic vibrations.
Claims69
A rotary cutting tool, comprising:
- an elongated tool body having a center and rotatable along a longitudinal axis of rotation passing through said center of the tool body;
- a fluted cutting end and a shank end formed integrally opposite to said fluted cutting end, said fluted cutting end having a nose, a periphery and an end surface extending from said nose to said periphery, said shank end having a shank extending along said longitudinal axis of rotation;
- and
- a plurality of flutes, extending generally along said end surface in an axial direction of the tool body and located unsymmetrically with each other around said longitudinal axis of rotation so as to be spaced apart from each other, each said flute having an integral adjacent radial cutting edge running alongside said flute for engaging and cutting a workpiece, each said radial cutting edge being helically curved and having a radial cutting edge geometry whereby each said radial cutting edge lies on the surface of a circumscribing cylinder defined by the rotation of said radial cutting edges about said longitudinal axis of rotation of the tool body and each said radial cutting edge has a circumferencial index;
- and
- each said radial cutting edge having a helix, a radial rake, and a radial relief.
A rotary cutting tool, comprising:
- an elongated tool body having a center and rotatable along a longitudinal axis of rotation passing through said center of the tool body;
- a fluted cutting end and a shank end formed integrally opposite to said fluted cutting end, said fluted cutting end having a nose, a periphery and an end surface extending from said nose to said periphery, said shank end having a shank extending along said longitudinal axis of rotation;
- a plurality of flutes extending generally along said end surface in an axial direction of the tool body and located unsymmetrically with each other around said longitudinal axis of rotation so as to be spaced apart from each other, each said flute having an integral adjacent axial cutting edge running alongside said flute for engaging and cutting a workpiece and forming a circumferencial index with respect to its adjacent flute in a plane perpendicular to said longitudinal axis of rotation, each said axial cutting edge having an axial cutting edge geometry whereby each said axial cutting edge lies on the surface of a plane perpendicular to said longitudinal axis of rotation of the tool body;
- and
- each said axial cutting edge having an axial rake and an axial relief.
A rotary cutting tool, comprising:
- an elongated tool body having a center and rotatable along a longitudinal axis of rotation passing through said center of the tool body;
- a fluted cutting end and a shank end formed integrally opposite to said fluted cutting end, said fluted cutting end having a nose, a periphery and an end surface extending from said nose to said periphery, said shank end having a shank extending along said longitudinal axis of rotation;
- a plurality of flutes extending generally along said end surface in an axial direction of the tool body and located unsymmetrically with each other around said longitudinal axis of rotation so as to be spaced apart from each other, each said flute having a body portion for insertion of a replaceable cutting insert for engaging and cutting a workpiece and forming a circumferencial index with respect to its adjacent flute in a plane perpendicular to said longitudinal axis of rotation, each said cutting insert is secured in said body portion and having a cutting edge that is straight or helically curved and forming a cutting edge geometry whereby each said cutting edge lies on the surface of a circumscribing cylinder defined by the rotation of said cutting edges about said longitudinal axis of rotation of the tool body;
- means for securing each said cutting insert in each said body portion;
- each said flute having a different helix and a different length when compared to each other, thereby said flutes becoming unsynchronous with each other;
- and
- each said flute and said cutting inserts having a rake and a relief.
Dependencies are inferred from the claim text.