Machining installation for workpieces
A machining installation for workpieces comprises a workpiece positioning device comprising a workpiece holder pivot unit as well as a tool positioning device comprising a tool holder pivot unit. The workpiece holder pivot unit is designed such that a workpiece holder is pivotable about at least three and no more than four workpiece holder pivot axes. Moreover, the tool holder pivot unit is designed such that a tool holder is pivotable about no more than two tool holder pivot axes. The machining installation has a simple design and ensures flexible and accurate machining of workpieces.
1. A machining installation for workpieces, the machining installation comprising
a workpiece positioning device for positioning workpieces to be machined, the workpiece positioning device comprising
a first base frame;
a workpiece holder; and
a workpiece holder pivot unit
which is arranged between the first base frame and the workpiece holder; and
which is designed such that the workpiece holder is pivotable about at least three and no more than four workpiece holder pivot axes;
a tool positioning device for positioning tools provided for machining the workpieces, the tool positioning device comprising
a second base frame;
a tool holder, the tool holder being a work spindle unit comprising a work spindle which is drivable for rotation about a spindle axis; and
a tool holder pivot unit
which is arranged between the second base frame and the tool holder; and
which is designed such that the tool holder is pivotable about no more than two tool holder pivot axes; and
a position measuring unit provided for measuring an absolute position of the workpiece holder.
2. A machining installation according to claim 1 , wherein the workpiece holder pivot unit is designed such that
a first workpiece holder pivot member is arranged on the first base frame for pivoting movement about a first vertical workpiece holder pivot axis;
a second workpiece holder pivot member is mounted to the first workpiece holder pivot member for pivoting movement about a second horizontal workpiece holder pivot axis;
a third workpiece holder pivot member is mounted to the second workpiece holder pivot member for pivoting movement about a third horizontal workpiece holder pivot axis; and
the workpiece holder is mounted to the third workpiece holder pivot member.
3. A machining installation according to claim 1 , wherein the workpiece holder pivot unit comprises exactly three workpiece holder pivot axes.
4. A machining installation according to claim 3 , wherein the workpiece holder is rigidly mounted to the third workpiece holder pivot member.
5. A machining installation according to claim 1 , wherein the workpiece holder pivot unit comprises exactly four workpiece holder pivot axes.
6. A machining installation according to claim 5 , wherein the workpiece holder is mounted to the third workpiece holder pivot member for pivoting movement about a fourth workpiece holder pivot axis, with the fourth workpiece holder pivot axis being a central longitudinal axis of the third workpiece holder pivot member.
7. A machining installation according to claim 1 , wherein the tool holder pivot unit is designed such that
a first tool holder pivot member is arranged on the second base frame for pivoting movement about a first horizontal tool holder pivot axis;
a second tool holder pivot member is mounted to the first tool holder pivot member for pivoting movement about a second vertical tool holder pivot axis; and
the tool holder is mounted to the second tool holder pivot member.
8. A machining installation according to claim 1 , wherein the tool holder pivot unit is designed such that
a tool holder pivot member is arranged on the second base frame for pivoting movement about a tool holder pivot axis extending vertically relative to the second base frame; and
the tool holder is mounted to the tool holder pivot member for pivoting movement about a second horizontal tool holder pivot axis.
9. A machining installation according to claim 1 , wherein the tool holder pivot unit comprises exactly two tool holder pivot axes.
10. A machining installation according to claim 1 , wherein a position measuring unit is designed as mechanical measuring kinematics.
11. A machining installation according to claim 10 , wherein the mechanical measuring kinematics is detachably mounted to the workpiece positioning device.
12. A machining installation according to claim 10 , wherein the mechanical measuring kinematics is arranged on a support frame which is mounted on a common sub-frame together with the workpiece holder positioning device and the tool holder positioning device.
13. A machining installation according to claim 1 , wherein a tool magazine and a tool changer interacting with said tool magazine and the tool holder are provided which are arranged on a common sub-frame together with the workpiece holder positioning device and the tool holder positioning device.
14. A machining installation according to claim 1 , wherein the spindle axis of the work spindle is displaceable relative to the spindle housing.
15. A machining installation according to claim 1 , wherein computing unit is provided
which is coupled with the position measuring unit and the work spindle unit; and
which is designed such that positioning errors of the workpiece holder are compensable.
16. A machining installation according to claim 1 , wherein a computing unit comprising a computed model of the workpiece positioning device is provided, with positioning errors of the workpiece holder being detectable and compensable by means of the computed model.