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US 5,779,399 AGranted
Rotary cutting apparatus
AssigneeMcDonnell Douglas Corporation
InventorLawrence Francis Kuberski
Life of this patent
Estimating the term…
Abstract
An end mill (10) has a cylindrical shank (12) with a longitudinal axis (22). Attached to the cylindrical shank (12) is a center flute (14) having a cutting edge (18) extending beyond the longitudinal axis (22). A non-center flute (16) is also attached to the cylindrical shank (12). The center flute (14) has a first rake angle (32) and the non-center flute (16) has a second rake angle (32) not equal to the first axial rake.
Claims17
An end mill apparatus, comprising:
- a cylindrical shank having a longitudinal axis;
- a center flute formed on the cylindrical shank, the center flute having a first axial rake;
- a non-center flute formed on the cylindrical shank, the non-center flute having a second axial rake not equal to the first axial rake;
- and
- a tip having an approximately planar surface on which the center flute terminates in a cutting edge, the cutting edge extending radially from an exterior perimeter through and beyond the longitudinal axis.
2 more elements
A rotary cutting apparatus, comprising:
- a cylindrical shank;
- a first flute formed on the cylindrical shank, having a first characteristic frequency and a cutting edge extending radially from an exterior perimeter through and beyond a longitudinal axis;
- and
- a second flute formed on the cylindrical shank, the second flute having a second characteristic frequency not equal to the first characteristic frequency.
1 more element
A rotary cutting apparatus, comprising:
- a cylindrical shank;
- a first flute formed on the cylindrical shank, having a first axial geometry and a cutting edge extending radially from an exterior perimeter through and beyond a longitudinal axis;
- and
- a second flute formed on the cylindrical shank, the second flute having a second axial geometry not equal to the first axial geometry.
1 more element
Dependencies are inferred from the claim text.