Machine tool

Abstract

A machine tool for machining workpieces (22), comprising three NC-controlled linear axes orthogonal to each other, namely a horizontal X-axis, a horizontal Y-axis and a vertical Z-axis, with a machine base (10), which comprises two vertically upwardly directed side beds (12) that are spaced from each other in the X-axis, with a bridge (28) displaceably guided in the Y-axis on top of the side beds (12), with a Z-slide disposed at the &enter of the bridge (28) in relation to the side beds (12), which slide can be displaced in the Z-axis and carries a tool spindle (46), with an X-guide element (14) disposed on the machine base (10), with a wbrkpiece holder element (16, 18, 20) displaceable on the X-guide unit, and with a tool holder disposed on the tool spindle (46).

Description

The invention will be explained in more detail hereinafter with reference to an exemplary embodiment illustrated in the drawing, wherein:

FIG. 1 is a front view of the machine tool, and

FIG. 2 is a vertically cut side view.

Claims

1. A machine tool for machining workpieces (22), comprising three NC-controlled linear axes orthogonal to each other, namely a horizontal X-axis, a horizontal Y-axis and a vertical Z-axis, with a machine base (10), which comprises two vertically upwardly directed side beds (12) that are spaced from each other in the X-axis, with a bridge (28) displaceably guided in the Y-axis on top of the side beds (12), with a Z-slide disposed at the center of the bridge (28) in relation to the side beds (12), which slide can be displaced in the Z-axis and carries a tool spindle (46), with an X-guide element (14) disposed on the machine base (10), with a workpiece holder element (16, 18, 20) displaceable on the X-guide unit, and with a tool holder disposed on the tool spindle (46), characterized in that the axis of the tool spindle (46) intersects the Z-axis and that the tool spindle (46) can be rotated by NC-control about an axis (C-axis) coinciding with the Z-axis, for which purpose the Z-slide (36) is mounted in the bridge (28) rotatably about this C-axis.

2. The machine tool according to claim 1, characterized in that the side beds (12) each comprise an aperture (24), through which the X-guide element (14) is guided.

3. The machine tool according to claim 1, characterized in that the Z-slide is disposed in the center of the bridge (28) also in relation to the Y-axis.

4. A machine tool according to claim 1, characterized in that the workpiece (22) can be rotated about an A-axis coinciding with the X-axis by NC-control in the workpiece holder device (16, 18, 20).

5. A machine tool according to claim 1, characterized in that the tool spindle (46) is mounted pivotably about a horizontal B-axis, which is located in a plane orthogonal to the Z-axis.

6. A machine tool according to claim 1, characterized in that a tool (52) chucked in the tool holder of the tool spindle (46) is located substantially in the Z-axis.

7. The machine tool according to claim 6, characterized in that the clearance of the side beds (12) in the X-direction allows a rotation of the tool spindle about the C-axis by 360°.

8. A machine tool according to claim 1, characterized in that a machine base (10) and the side beds (12) form a single-piece mineral cast component.

9. A machine tool according to claim 1, characterized in that the machine tool is configured as a grinding machine.