The CNC high-speed machining centre C 22 U dynamic developed by Hermle in 2010 can now also be fully automated
The pallet changer PW 150 was specially designed for the workpiece dimensions of the C 22 and can convey transport weights up to 250 kg including pallet. The system consists of an NC controlled drive unit and a turning unit with double gripper. Both units are positioned compactly on the left next to the machine and allow completely free access to the working area of the machine. The pallet changer does not have to be dismounted for transportation, it does not require a floor mounting and is adapted quickly and easily to the machine at the customer's. The key feature of the pallet changer is the double gripper which can be used to simultaneously move two pallets in or out with 150 kg transport weight each or, for a one-sided application, one pallet with up to 250 kg transport weight. The maximum workpiece cube has a diameter of Ø 400 mm with a maximum workpiece height of 370 mm. This corresponds approximately to the workpiece dimensions of the C 22 to be machined. The standard design can handle up to 6 pallets, with the additional storage up to 11 pallets. The side setup station (optionally rotatable) offers ideal conditions for setup in parallel to production time. Pallet change procedure: The spindle moves to the park position into the tool magazine. The top and the expansion bellows of the left side wall are opened together and therefore provide access to the drive unit/turning unit with adapted double gripper. Meanwhile the double gripper docks with a pallet and moves it through the side access of the machining centre into the working area. The free side of the double gripper docks with and lifts the finished part pallet on the NC swivelling rotary table. Rotated through 180°, both pallets are replaced and the blank pallet is placed on the table. The drive unit/turning unit conveys the finished part pallet into the storage or into the setup station.