Changing system

A cutting machine, comprising:

• a table having a working surface configured to accommodate an object to be cut;
• a crossbeam disposed above the working surface and movably mounted on the table, the crossbeam being movable parallel to a first horizontal axis;
• a module that is movably mounted on the crossbeam, the module being movable parallel to a second horizontal axis, wherein the second horizontal axis extends perpendicularly to the first horizontal axis;
• a tool holder that is movably mounted in the module, the tool holder configured to:
• move parallel to a vertical axis,
• rotate about the vertical axis, and
• accommodate one of a plurality of different interchangeable tools,
• wherein the tool holder comprises:
• a tapered recess and an end surface, an inner space of the tool holder being defined based on the tapered recess and the end surface;
• and
• a connection device disposed on the end surface and configured to engage an accommodated tool during a tool-receiving operation, wherein the connection device includes a fluid feedthrough and one or more electrical contact elements, and wherein the connection device is configured to supply the accommodated tool with electrical energy via the one or more electrical contact elements and a fluid via the fluid feedthrough;
• a rotary joint disposed between the module and the tool holder or at the connection device, wherein the rotary joint is configured to supply the fluid to the connection device;
• a rotary transmitter disposed between the module and the tool holder or at the connection device, wherein the rotary transmitter is configured to supply the electrical energy to the connection device;
• and
• a control unit configured to control the cutting machine to automatically perform a tool change operation,
• wherein:
• the tapered recess is configured to interact with a tapered shape of the accommodated tool to center the accommodated tool with respect to the vertical axis during the tool-receiving operation,
• the connection device is configured to connect to a connection counter-device of the accommodated tool within the inner space of the tool holder during the tool-receiving operation, and
• the connection counter-device is configured to supply the electrical energy and the fluid to the accommodated tool.