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US 9,539,633 B2Granted
Machine tool drive system
AssigneeTRUMPF Werkzeugmaschinen GmbH + Co. KG
InventorsDennis Traenklein, Joerg Neupert, Kai Etzel
Life of this patent
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Abstract
A drive system for a machine tool comprises two, at least equally long drive spindles, extending parallel to each other and being structurally identical with regard to their torsional rigidity and their axial rigidity, which are each supported to rotate about a spindle axis, and which can be driven about the spindle axis concerned. Each of the drive spindles has a fixed bearing at one end, acting in its longitudinal direction. Spindle nuts, which are seated on the drive spindles can be moved simultaneously with longitudinal movements in the longitudinal direction of the drive spindles.
Claims20
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).
5 more elements
A machine tool drive system comprising:
- a spindle arrangement that has at least one drive spindle;
- 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;
- and
- two drive motors, each drive motor engaging a respective one of the two drive spindles, and two drivetrains, each drivetrain connecting a respective one of the drive spindle to a respective one of the drive motors, wherein the drivetrains are of equivalent torsional rigidity,
- 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, and
- wherein at least one of the drivetrains comprises a spindle extension, extending in the longitudinal direction of the respective drive spindle, which spindle extension is non-rotationally connected with the respective drive spindle.
5 more elements
A sheet metal processing machine comprising:
- (a) a machining tool configured to process sheet metal;
- (b) 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;
- and
- 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;
- and
- (c) a wedge gear positioned between the drive system and the machining tool, the wedge gear comprising two drive side wedge gear elements and two tool side wedge gear elements, wherein each drive side wedge gear element is associated with a respective tool side gear element, together forming a wedge gear element pair,
- wherein the wedge gear elements of each wedge gear element pair lie opposite each other on at least one wedge surface, and the wedge surfaces of both wedge gear element pairs are inclined in opposite directions relative to the spindle axes of the drive spindles of the drive system,
- wherein each of the drive side wedge gear elements is connected with one of the spindle nuts of the drive system and each of the tool side wedge gear elements is connected with the machining tool,
- wherein the drive side wedge gear elements are configured to be moved jointly with the spindle nuts by the drive spindles, simultaneously with longitudinal movements in the longitudinal direction of the drive spindles, and, thereby, a movement of the machining tool being able to be generated via the tool side wedge gear elements wherein at the start of their simultaneous longitudinal movements, the spindle nuts are not distanced from each other in the longitudinal direction of the drive spindles, and
- wherein during opposing longitudinal movements a first spindle nut of the spindle nuts, together with a projection, supporting it in rotation, of the drive side gear wedge connected with the first spindle nut, enters a recess at the drive side gear wedge connected with a second spindle nut of the spindle nuts and the second spindle nut, together with a projection, supporting it in rotation, of the drive side gear wedge connected with the second spindle nut, enters a recess at the drive side gear wedge connected with the first spindle nut.
10 more elements
Dependencies are inferred from the claim text.