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AssigneeKennametal Inc.
InventorsMarcus PAUL, Bernhard ECKL, Herbert Rudolf KAUPER
Estimating the term…
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).
A combination tool comprising a drill extending in a longitudinal direction along a rotational axis (R) and with a clamping sleeve, which is designed to receive the drill and fasten the drill with variable length and which has a holding seat for a cutting insert, wherein the drill has a cutting region provided with grooves and the grooves extend helically at a twist angle γ, wherein drill backs extending helically with a curved peripheral surface are formed between two grooves, wherein at least one of the drill backs is partially flattened to form an adjustment surface,
A drill for a combination tool, which drill comprises a cutting insert provided with grooves, wherein the grooves extend helically at a twist angle (γ) and drill backs extending helically with a curved peripheral surface are formed between two grooves, wherein at least one of the drill backs is partially flattened to form an adjustment surface,
Dependencies are inferred from the claim text.