Tool turret for processing workpieces and processing system with this type of tool turret

A tool turret for machining workpieces, the tool turret comprising:

• a housing;
• a drive unit mounted on the housing;
• a rotary part having an axis of rotation and a plurality of tool holders arranged on a circumference of the rotary part for holding tools, which rotary part can be rotated relative to the housing around the axis of rotation into a plurality of rotary positions by means of the drive unit;
• a first feed line for feeding a cryogenic cooling medium to the tools in a direction parallel to the axis of rotation, which parallel feeding occurs at least in sections of the first feed line;
• and,
• a plurality of second feed lines coupled to the tools for feeding the cryogenic cooling medium to the tools in a direction that is perpendicular to the axis of rotation, which perpendicular feeding occurs in at least part of each of the second feed lines,
• wherein at least sections of the first feed line can be moved in a linear manner parallel to the axis of rotation by means of a linear actuator between a first and a second position;
• whereby
• the first feed line in the first position is connected to one of the second feed lines for transferring the cryogenic cooling medium from the first feed line to the one second feed line, and,
• the first feed line in the second position is separated from the second feed lines to allow a change to the rotary position of the rotary part;
• and
• wherein the first feed line includes an inner pipe and an outer pipe surrounding the inner pipe so as to define an insulation chamber between the inner pipe and the outer pipe, and wherein the outer pipe includes a pleated section within the linear actuator so that the outer pipe can change in length.