Corner radius end mill
AssigneeIscar, Ltd.
InventorsEliyahu Budda, Alexander Khina
Life of this patent
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Abstract
A corner radius end mill includes a blended gash extending along a cutting edge. The blended gash is formed in a corner sector of the end mill. The corner sector has a first half-sector and a second half-sector defined on opposite sides of an imaginary bisection line of the corner sector, the first and second half-sectors subtending equal angles about the imaginary bisection line. The blended gash extends from a first extremity located in the second half-sector in a direction away from the first half-sector. The blended gash blends an end gash surface and flute rake surface of the corner radius end mill.
Claims20
A corner radius end mill configured for rotating about a rotation axis (AR), comprising:
- a shank portion;
- and
- a cutting portion extending from the shank portion and having a diameter (D);
- the cutting portion comprising:
- a helical flute having a helix angle H which fulfills the condition 20°<H<60° and comprising a flute rake surface;
- a cutting tooth comprising a cutting edge which extends adjacent to the flute rake surface, and comprising a corner sector with a corner radius R which fulfills the condition R>0.15 D, a first half-sector of the corner sector extending from an imaginary bisection line of the corner sector to a radial tangent point and a second half-sector of the corner sector extending from the imaginary bisection line to an axial tangent point, the first and second half-sectors subtending equal angles about the imaginary bisection line;
- an end gash surface extending adjacent the cutting edge and the flute rake surface;
- and
- a blended gash extending along the cutting edge from a first extremity located in the second half-sector in a direction away from the first half-sector, and blending the end gash surface and the flute rake surface.
Dependencies are inferred from the claim text.