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 ).

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.