Patent ID: 9539633
Date: 2017-01-10
CPC Classifications: B21D,B21J,B30B

Claim:
1. A machine tool drive system comprising: a spindle arrangement that has at least one drive spindle; and two spindle nuts, the spindle arrangement comprising two drive spindles extending parallel to each other along a longitudinal direction, each drive spindle supported for rotation about a respective spindle axis and configured to be driven about the respective spindle axis, the two drive spindles being of identical torsional and axial rigidity and each having a fixed bearing at one end, acting in the longitudinal direction of the respective drive spindle; wherein the two spindle nuts are configured to be moved by the spindle arrangement simultaneously with longitudinal movements in the longitudinal direction of the drive spindles, each of the spindle nuts seated on an associated one of the two drive spindles; wherein the spindle nuts are moveable by the spindle arrangement, in the longitudinal direction of the drive spindles, by each of the spindle nuts being movable by the associated drive spindle; wherein at the start of their simultaneous longitudinal movements, the spindle nuts are distanced from each other by a distance value (d), different from zero, in the longitudinal direction of the drive spindles, and wherein the drive spindles are offset relative to each other, in the longitudinal direction, by the distance value (d).