End-mill tool with multiple cutting edges
OwnerLon J. Wardellinventor
Life of this patent
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Abstract
The present invention provides an end-mill tool which includes a shank, a point, and a main body portion located intermediate the shank and the point. A first flute is formed on the main body portion along a first helix. A second flute is formed on the main body portion along a second helix. The first and second flutes preferably extend helically along the body of the tool. Two distinct helical cutting surfaces are defined by the first flute and the second flute. The point of the tool includes two additional cutting edges formed by ears extending outward from the point of the tool adjacent the first flute and the second flute.
Claims13
An end mill for performing a machining operation on a workpiece, the end mill comprising:
- a shank having a central axis;
- a distal end defining an end plane transverse to the axis;
- a main body portion located intermediate the shank and the distal end;
- a first flute formed on the main body portion along a first helix angle, the first flute defining a first helical cutting surface terminating at a first cutting edge lying in the end plane;
- a second flute formed on the main body portion along a second helix angle, the second flute defining a second helical cutting surface terminating at a second end-teeth cutting edge lying in the end plane;
- and
- at least one ear portion extending outwardly from the main body portion, the ear portion defining a cutting edge also lying in the end plane.
A combined roughing and finishing end-mill tool for forming a workpiece by removing chips from the workpiece, the end-mill tool comprising:
- a shank for engaging the end-mill tool with a rotating device for rotating the end-mill tool about a longitudinal axis;
- a distal end defining a plane transverse to the axis;
- a main body portion located intermediate the shank and the distal end;
- a first flute formed on the main body portion along a first helix angle, the first flute defining a first helical cutting surface terminating at a first end-teeth cutting edge in the plane;
- a second flute formed on the main body portion along a second helix angle, the second flute defining a second helical cutting surface terminating at a second end-teeth cutting edge in the plane, the first and second end-teeth cutting edges of the first and the second flutes, forming a continuous line through the axis;
- and
- a primary ear and a secondary ear, each ear extending from the main body portion and defining respective primary and secondary ear end-teeth cutting edges also lying in the plane at the point, the primary and secondary ear end-teeth cutting edges forming a continuous line.
Dependencies are inferred from the claim text.