| US 7,500,810 B2 | ||
| Insert with replaceable cutting edge and corner milling cutter with replaceable cutting edge | ||
| Atsuhiko Maeta, Itami (Japan); and Shigenori Emoto, Itami (Japan) | ||
| Assigned to Sumitomo Electric Hardmetal, Corp., Hyogo (Japan) | ||
| Filed on Nov. 07, 2006, as Appl. No. 11/557,157. | ||
| Claims priority of application No. 2005-322115 (JP), filed on Nov. 07, 2005. | ||
| Prior Publication US 2007/0104546 A1, May 10, 2007 | ||
| Int. Cl. B23B 27/16 (2006.01); B23B 27/00 (2006.01) | ||
| U.S. Cl. 407—113 [407/114; 407/115; 407/116] | 9 Claims |
| 1. A replaceable-blade cutting insert for corner milling cutters comprising:
a first surface and a second surface facing opposite directions;
a third surface and a fourth surface intersecting with and connecting to said first surface and said second surface; and
a fifth surface and a sixth surface intersecting with said first surface and said second surface and said third surface and
said fourth surface,
wherein said first surface is used as a rake face, said third surface is used as an outer perimeter flank face, and said fifth
surface is used as a front flank face,
wherein four sections of said third surface are twisted towards said fourth surface to form four twisted surfaces that slope
towards said fourth surface at substantially 3 to 15 deg, two of said four twisted surfaces of said third surface intersect
with said first surface and create with said first surface a ridge line that serves as a main cutting section, and two of
said four twisted surfaces of said third surface intersect with said second surface,
wherein four sections of said fourth surface are twisted towards said third surface to form four twisted surfaces that slope
towards said third surface at substantially 3 to 15 degrees, two of said four twisted surfaces of said fourth surface intersect
with said first surface, and two of said four twisted surfaces of said fourth surface intersect with said second surface,
wherein said four twisted surfaces of said third surface and said four twisted surfaces of said fourth surface are each formed
with a width that gradually decreases.
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