| 摘要 |
A milling machine comprises a machine bed, two workpiece-gripping heads carried by the machine bed, and at least one cutter carriage, which is carried by the machine bed and is movable along guide rails which are normal to the longitudinal axis of the machine. The cutter carriage carries an internally cutting, annular milling cutter. To permit the milling cutter to be changed quickly and easily, the cutter carriage is movable along the guide rails from a central position over a distance which exceeds the radial positioning and feed movement of the milling cutter to an offset position for a tool change. In that position, at least a major portion of the milling cutter, when viewed in the direction of the longitudinal axis of the machine, is disposed outside the contours of the gripping heads.
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