The invention relates to a machine tool (10) comprising a machine controller (19), a machine frame (11), a work table (13), a tool holder (14), preferably of a standardized design, multiple translational and/or rotational axes (12a, 12b) for adjusting the relative position of the work table (13) and the work holder (14), a tool magazine (16) for one or more material-removing, in particular machining tools (15), a tool-change mechanism for automatically transporting tools between the tool holder (14) and the tool magazine (16), a deposit-welding head (20) that can be inserted into the tool holder (14) and a storage device (25) for storing the deposit-welding head outside the tool holder (14).