Machine tool having a number of multispindle spindle assemblies

A machine tool for machining workpieces, wherein the machine tool comprises:

• a first spindle assembly having a first common spindle housing and at least two working spindles arranged in the first common spindle housing, each working spindle having a machining tool for workpiece machining;
• a second spindle assembly having a second common spindle housing and at least two working spindles arranged in the second common spindle housing, each working spindle having a machining tool for workpiece machining;
• a work holding device for holding workpieces for workpiece machining by means of the machining tools;
• and
• a guide arrangement for the relative positioning of the work holding device holding the workpieces and of the first spindle assembly and the second spindle assembly for workpiece machining,
• wherein the guide arrangement comprises:
• a first spindle assembly guide rail extending in a linear x-direction for supporting and guiding the first spindle assembly, the first spindle assembly being movable on the first spindle assembly guide rail in the x-direction;
• a second spindle assembly guide rail extending in the x-direction and spaced from the first spindle assembly guide rail in a linear y-direction perpendicular to the x-direction for supporting and guiding the second spindle assembly, the second spindle assembly being movable on the second spindle assembly guide rail in the x-direction parallel with the movement of the first spindle assembly, the second spindle assembly guide rail being separate from the first spindle assembly guide rail of the guide arrangement so that the first spindle assembly is not movable on the second spindle assembly guide rail, and so that the spindle assemblies are movable independently of one another into a working region, in which the workpieces are machined, and into a tool changing region, in which machining tools of the working spindles are changed;
• a first work holding device guide rail extending in a linear z-direction perpendicular to the x-direction and perpendicular to the y-direction for supporting and guiding the work holding device in the z-direction toward and away from the first spindle assembly and the second spindle assembly;
• and
• a second work holding device guide rail extending in the y-direction for guiding the work holding device in the y-direction between the first spindle assembly and the second spindle assembly.