公开(公告)号：EP3736072A1

公开(公告)日：2020-11-11

申请号：EP19172899.7

申请日：2019-05-07

申请人： AB Sandvik Coromant

发明人： PITTALA, Gaetano

IPC分类号： B23C5/28 ,  B23C5/10

摘要： The invention relates to a milling tool (1, 10) comprising an elongate cutting head (2) having a front end (3), a rear end (4), and a longitudinal axis (L) extending therebetween, wherein the cutting head (2) comprises a plurality of flutes (5) separated from each other by a corresponding number of intermediate portions (6), wherein the flutes (5) extend axially along the cutting head (2). The cutting head comprises a coolant distributing through-hole (7) extending between two adjacent flutes (5) through the intermediate portion (6) located therebetween, for influencing the distribution of coolant provided to the milling tool (1).

公开(公告)号：EP3965988A1

公开(公告)日：2022-03-16

申请号：EP20718698.2

申请日：2020-04-21

申请人： AB Sandvik Coromant

发明人： PITTALA, Gaetano

IPC分类号： B23C5/28 ,  B23C5/10

公开(公告)号：EP3819056A1

公开(公告)日：2021-05-12

申请号：EP19207415.1

申请日：2019-11-06

申请人： AB Sandvik Coromant

发明人： PITTALA, Gaetano ,  LILJEREHN, Anders

IPC分类号： B23C5/10

摘要： The invention relates to a milling tool (1) having a front end (2), a rear end (3), and a longitudinal axis (C) extending therebetween, wherein the milling tool comprises a shank portion (4) and a cutting portion (5). The cutting portion extends along the longitudinal axis from the front end towards the shank portion, and comprises a plurality of teeth (6) separated from each other by a corresponding number of flutes (7), wherein the teeth (6) extend axially along the cutting portion (5) following a curved helical path around the longitudinal axis. Each tooth (6) extends at a first helix angle (α) from the front end (2) to a helix transition (8), and at a second helix angle (β) from the helix transition towards the shank portion. The second helix angle (β) is greater than the first helix angle (α) by at least 2° and at most 15°. The first helix angle (α) fulfills 33° ≤ α ≤ 50°, whereas the second helix angle (β) fulfills 40° ≤ β ≤ 55°, and the helix transition (8) is axially located within a distance, from the front end (2), of 0.2 to 0.7 of the longitudinal length of the cutting portion (5).