Rotary metal cutting tool
OwnerRichard J. Walrathinventor
Life of this patent
Estimating the term…
Abstract
A rotary end-mill is disclosed having a deferential flute construction with all individual flutes being unequally spaced about the circumference of the cylindrical tool body at different helix angles. The cutting edges of these flutes also face in the direction of tool rotation
Claims19
An end-mill metal cutting tool having a cylindrical body with a shank end and a cutting end, said cutting end including a plurality of non-intersecting helical cutting flutes all unequally spaced from each other about the circumference of said cutting end, and said helical cutting flutes each being oriented at a different helix angle with respect to all remaining cutting flutes while further having continuous cutting edges formed in each flute member, said unequal helix angles and unequal spacing for all cutting flutes combining to reduce vibration harmonics during the machining process.
A cylindrical metal cutting end-mill tool having a shank end and a cutting end, said cutting end having three non-intersecting helical cutting flutes unequally spaced about the circumference of said cutting end, the first helical cutting flute being angularly displaced from the zero angle position on said circumference, the second helical cutting flute being angularly displaced from the one hundred twenty degree angle position on said circumference, and the third helical cutting flute being angularly displaced from the two hundred forty degree angle position on said circumference, said helical cutting flutes also each being oriented at a different helix angle with respect to all remaining cutting flutes while further having continuous cutting edges formed in each flute member, said unequal helix angles and unequal spacing for all cutting flutes combining to reduce vibration harmonics during the machining process.
Dependencies are inferred from the claim text.