| 摘要 |
The present invention concerns a milling tool formed for the hobbing of a workpiece having cogs, such as cogwheels, racks, and the like, comprising a cylindrical tool body, which defines a rotation axis (C1, C3) and comprises a plurality of discshaped segments (8). Each one of the segments includes a hub part (11) and a peripheral cam (12) for a plurality of tangentially spaced-apart milling inserts (20), wherein bordering segments (8) are detachably interconnected. Each segment has a through hole situated on the rotation axis (C1, C3), which holes are directed in such a way in relation to each other that a central duct is formed in the cylindrical tool body. Bordering segments (8) are torsionally rigidly interconnected. The milling tool comprises furthermore a first end piece, which on its one side is detachably and torsionally rigidly interconnected with a first one of the segments and which on its other side has coupling members for torsionally rigid coupling to a source of torque in such a way that all torque from the source is supplied to the cylindrical tool body via the first end piece, the central duct being a cooling medium duct. |
