Ballnose end mill and insert therefor

Details Ballnose end mill and insert therefor Ballnose end mill and insert therefor

B - Operations, Transporting

23

C

29/43

B23C 5/02 (2006.01) B23C 5/10 (2006.01) B23C 5/22 (2006.01)

Patent

CA 1222369

ABSTRACT OF THE DISCLOSURE A ballnose end mill with identical on-edge convex inserts is capable of drilling and milling, and apportioning the major milling load between the inserts. Each insert is a block of cutting material having a first major face which is cylindrically convex and an opposite major face which is plane, rhomboidal in outline, with its opposite major edges in chordal relation to the cylindrical major face, and upon which the block is adapted to be seated in a recess in a tool holder. The block also has a pair of opposed, plane, minor boundary surfaces which intersect the plane rhomboidal face on the two major edges and diverge therefrom at equal angles to intersect the convex major face at an acute included angle to form therewith two substantially circular cutting edges on the boundary faces and a second pair of opposed, plane, minor boundary surfaces which intersect the plane rhomboidal face perpendicularly on its two minor edges.

447613

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