公开(公告)号：US20230133391A1

公开(公告)日：2023-05-04

申请号：US17519267

申请日：2021-11-04

Applicant: Kennametal Inc.

Inventor： Leonid B. Sharivker ,  Sergei Boulakhov ,  Stephen M. George ,  John Boyea

IPC: B23C5/10

Abstract: A rotary cutting tool includes a shank portion, a cutting portion, and a cutting tip. The cutting portion includes a plurality of blades and a plurality of flutes. Each blade includes a leading face, a trailing face, and a land surface extending between the leading face and the trailing face. The cutting end includes an end cutting edge having a first end face cutting edge portion formed with a positive, neutral or negative radial angle, a positive dish angle and a negative axial rake angle, and second end face cutting edge portion formed with a highly positive radial angle, a positive dish angle and a negative axial rake angle. The highly positive radial angle of the second end face cutting edge portion enables the rotary cutting tool to perform a ramp operation at very large ramp angles of between about 15-45 degrees.

公开(公告)号：US11865629B2

公开(公告)日：2024-01-09

申请号：US17519267

申请日：2021-11-04

Applicant: Kennametal Inc.

Inventor： Leonid B. Sharivker ,  Sergei Boulakhov ,  Stephen M. George ,  John Boyea

IPC: B23C5/10

CPC classification number: B23C5/10 ,  B23C2210/04

Abstract: A rotary cutting tool includes a shank portion, a cutting portion, and a cutting tip. The cutting portion includes a plurality of blades and a plurality of flutes. Each blade includes a leading face, a trailing face, and a land surface extending between the leading face and the trailing face. The cutting end includes an end cutting edge having a first end face cutting edge portion formed with a positive, neutral or negative radial angle, a positive dish angle and a negative axial rake angle, and second end face cutting edge portion formed with a highly positive radial angle, a positive dish angle and a negative axial rake angle. The highly positive radial angle of the second end face cutting edge portion enables the rotary cutting tool to perform a ramp operation at very large ramp angles of between about 15-45 degrees.