公开(公告)号：US20220184717A1

公开(公告)日：2022-06-16

申请号：US17439546

申请日：2020-03-13

Applicant: Kennametal Inc.

Inventor： Marcus PAUL ,  Bernhard ECKL ,  Herbert Rudolf KAUPER

IPC: B23B51/10 ,  B23B51/00

Abstract: The combination tool (2), in particular a drilling/chamfering tool, comprises a drill (6) extending in the longitudinal direction (4) with a clamping sleeve (8), which is designed to receive the drill (6) and fasten the drill (6) at a variable length and which has a holding seat (38) for a cutting insert (12). The drill (6) comprises a cutting region (22) provided with grooves (14), wherein the grooves (14) extend helically and are formed between two grooves (14) drill backs (18). At least one of the drill backs (18) is partially flattened to form an adjustment surface (16) for the cutting insert (12), wherein the adjustment surface (16) extends helically. As a result, a length adjustment over a large length range is made possible independently of the twist angle (γ).