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Modern Machine Shop
The CNC C 22 U dynamic high speed machining center from Hermle can be fully automated with the addition of the PW 150 pallet changer, which is specially designed for the workpiece dimensions of the center. The maximum workpiece cube has a diameter measuring 400 mm with a maximum workpiece height of 370 mm.
The automated system consists of an NC-controlled drive unit and a turning unit with double gripper. Both units are said to be positioned compactly next to the machine to enable free access to the working area. The double gripper can be used to simultaneously move two pallets with 150-kg transport weight each, in or out, or one pallet with as much as 250 kg transport weight.
During the pallet-change procedure, the spindle moves to the park position in the tool magazine. The top and expansion bellows of the left side wall are opened to provide access to the drive/turning unit with adapted double gripper. The gripper docks with a pallet and moves it through the side access of the machining center and into the working area. The free side of the gripper docks with and lifts the finished part pallet on the NC swiveling rotary table. Rotating 180 degrees, both pallets are positioned and the blank pallet is placed on the table. The drive/turning unit conveys the finished part pallet into the storage or setup station.
According to the company, the pallet changer does not have to be dismantled for transportation, does not require a floor mounting and can be quickly adapted to the user’s facility. The standard design can handle as many as six pallets, with additional storage for 11 pallets. The side setup station (optional rotation) enables setup concurrent with production time. Optionally, several machining centers can be interlinked and combined into an automated manufacturing center with an extended pallet changer.