Device for machining winding slots of generator rotors

Apparatus for finish machining winding slots cut in a generator rotor workpiece comprising, in combination, clamping means for clamping the workpiece in a number of index positions corresponding to the number of winding slots, a tool, including a plate-shaped support having a longitudinal rim, first and second rows of cutting edges mounted on the longitudinal rim of the plate, the cutting edges of each row being disposed linearly one behind the other and displaced with respect to each other by one depth of cut in a direction normal to the cutting direction, the first row of cutting edges protruding in one direction from the plate and the cutting edges of the first row being directed in one direction, the second row of cutting edges protruding in the opposite direction from the plate, and the cutting edges of the second row being directed in the opposite direction to the cutting edges of the first row, at least one tool slide, means for guiding the tool slide in a select rotor slot in the longitudinal direction with respect to the workpiece, the tool slide having means for holding the tool during cutting, and copying means including at least one template for controlling the depth the tool extends into the select rotor slot and the depth the tool penetrates vertically to at least one wall of the select rotor slot, the tool slide further including a first operating element, the tool slide guiding means further including a second operating element at each end, the first and second operating elements cooperating together at a first end of the guiding means to bring the first row of cutting edges into engagement with the workpiece, and at a second end of the guiding means to bring the second row of cutting edges into engagement with the workpiece and to cause the copying device to change the depth of penetration of the tool into the workpiece.