End mill
OwnerGuy Calamiainventor
Life of this patent
Estimating the term…
Abstract
An end mill with a peripheral margin which increases in width from the terminal end of the tool to the shank portion of the tool. The end mill also has a tooth face made up of three tooth-face walls The depth of the tool face gradually decreases from the terminal end to the shank portion of the tool. The end mill also has an end cutting face which includes a flat, narrow land at the outmost region of the end cutting end. The end mill has chip breakers with rounded peripheral corners. The end mill can be made up of ultra-fine micro grain tungsten carbide with a cobalt content which varies throughout the length of the tool.
Claims23
An improved helical, fluted single-end end mill having a shank section, which is retained in a rotary driven apparatus, and a helically fluted cutting section, the terminal end of said fluted section at the opposite end of said shank section, one or more helical teeth formed on the outer surface of said fluted section, each tooth comprising a multi-faceted tooth face, a peripheral cutting edge, a margin, a radial relief section and a clearance surface, wherein the improvement comprises:
- a variable margin on said helical cutting teeth such that the margin is most narrow at the terminal end of each of said helical cutting teeth and widest at the upper end of said teeth.
An improved helical, fluted single-end end mill having a shank section, which is retained in a rotary driven apparatus, and a helically fluted cutting section, the terminal end of said fluted section at the opposite end of said shank section, one or more helical teeth formed on the outer surface of said fluted section, each tooth comprising a multi-faceted tooth face, a peripheral cutting edge, a margin, a radial relief section and a clearance surface, wherein the improvement comprises:
- a variable depth multi-faceted tooth face wherein the depth of the tooth face is greatest at terminal end of the cutting section and least at the upper portion of said helical cutting teeth.
An improved helical, fluted single-end end mill having a shank section, which is retained in a rotary driven apparatus, and a helically fluted cutting section, the terminal end of said fluted section at the opposite end of the shank section, one or more helical teeth formed on the outer surface of said fluted section, each tooth compromising a two face, a peripheral cutting edge, a radial relief section, and a clearance surface wherein the improvement comprises:
- an end cutting edge of each of said helical teeth wherein said terminal face is comprised of a flat outer most region which is between 89° and 90° from perpendicular to the axis of the end mill and an inner region with a concaved angle.
An improved helical, fluted single-end end mill having a shank section, which is retained in a rotary drive apparatus, and a helically fluted cutting section, the terminal end of said fluted cutting section at the opposite end of the shank section, one or more helical teeth formed on the outer surface of said fluted section, each tooth comprising a two face, a peripheral cutting edge, a radial relief section and a clearance surface wherein the improvement comprises:
- an end cutting edge of each of said helical teeth wherein said end cutting edge is comprised of an arcuate concave curve which draws an upard angle of between 170 and 178°.
An improved helical, fluted single-end end mill having a shank section, which is retained in a rotary drive apparatus, and a helically fluted cutting section, the terminal end of said fluted cutting section at the opposite end of the shank section, one or more helical teeth formed on the outer surface of said fluted section, each tooth comprising a two face, a peripheral cutting edge, a radial relief section and a clearance surface wherein the improvement comprises:
- one or more grooved chipbreakers wherein the upper corners of said groove are rounded.
Dependencies are inferred from the claim text.