Patent ID: 9616539
Date: 2017-04-11
CPC Classifications: B23Q,B65G,Y10T

Claim:
1. A machine tool for 5-axis processing of workpieces, the machine tool comprising: a machine frame having a horizontal machine bed and a vertical stand, a processing chamber formed on the machine frame, at least one rotary-driven tool spindle which is mounted in the vertical stand, and is movable in the processing chamber in X, Y, and Z axes that are perpendicular to one another, a pivot bridge mounted in the processing chamber, wherein the pivot bridge is supported on the machine bed, and is pivotable about an A axis, which extends parallel to the X axis, at least one round table arranged on the pivot bridge for releasably mounting a first workpiece pallet, the at least one round table being rotatable about a B axis, a loading and unloading chamber, which is formed next to the processing chamber, and at least one pallet changer arranged in the loading and unloading chamber, wherein the at least one pallet changer is linearly displaceable only in a vertical direction, and is pivotable about a vertical axis, wherein the at least one pallet changer comprises first and second holding means for releasably mounting at least the first workpiece pallet and a second workpiece pallet, wherein the at least one pallet changer is movable in the vertical direction along a vertical displacement path from a first loading and unloading position with the second workpiece pallet mounted in the second holding means to a second position, thereby forming a connection between the first holding means and the first workpiece pallet, which is disposed upon the at least one round table of the pivot bridge, wherein the at least one pallet changer is movable in the vertical direction from the second position into a third position, in which the first workpiece pallet connected to the first holding means is lifted upwards from the at least one round table of the pivot bridge, wherein the at least one pallet changer in the third position is rotated about the vertical axis, thereby pivoting the first workpiece pallet lifted from the pivot bridge into the loading and unloading chamber and pivoting the second workpiece pallet from the loading and unloading chamber into the processing chamber, wherein the at least one pallet changer is lowerable via the second position back into the first position, wherein at least one work holder is provided, which work holder is arranged in the loading and unloading chamber underneath of the pivot bridge for releasably mounting a given one of the first and second workpiece pallets.