Tool replacement apparatus

A tool replacement apparatus for a machine tool comprising:

• a turning tool magazine capable of attaching or removing a tool to/from a spindle of a machine tool;
• and
• a tool replacement control unit which controls operations of turning the tool magazine and attaching or removing a tool to/from a spindle, wherein the tool replacement control unit includes:
• a data storing unit which stores data about an interference region or a rotatable range of a tool magazine which corresponds to data about a tool length of a tool;
• a unit which calculates and sets a rotatable range of a tool magazine from a tool length of a tool attached to a tool magazine, based on data stored in the data storing unit;
• and
• a unit which stops an operation of replacing a tool when a determining unit determines that a designated rotation angle is out of the rotatable range.