Machine tool system and machining method

A machining liquid supply system for supplying a machining liquid into a machining region in which a tool held on a spindle included in a machine tool engages with a workpiece for machining through a machining liquid spouting nozzle, said machining liquid supply system comprising:

• a machining liquid supply means including the machining liquid spouting nozzle for spouting the machining liquid into the machining region in which the tool engages with the workpiece, and connected through piping to a machining liquid source;
• a nozzle support means disposed in a region surrounding the spindle to support the machining liquid spouting nozzle of the machining liquid supply means to as to be movable;
• the nozzle support means comprising a support rod supporting the machining liquid spouting nozzle of the machining liquid supply means so that the machining liquid spouting nozzle can be linearly moved in radial directions with respect to the tool;
• a cylindrical bracket supporting the machining liquid spouting nozzle supported on the support rod so that the machining liquid spouting nozzle can be moved together with the support rod along a circle about the tool;
• said cylindrical bracket being guided for movement by a guide member disposed in a region around the spindle;
• and
• a first machining liquid spouting nozzle moving means capable of radially moving the machining liquid spouting nozzle of the machining liquid supply means with respect to the tool to position the machining liquid spouting nozzle;
• and
• a second machining liquid spouting nozzle moving means capable of moving the machining liquid spouting nozzle around the tool along a circle to position the machining liquid spouting nozzle.

A machining method of machining a workpiece in a desired shape by moving a tool detachably held on a spindle included in a machine tool relative to each other, said machining method comprising the steps of:

• moving the spindle and the table relatively to each other in linear directions parallel to an X-axis, a Y-axis and a Z-axis;
• turning the workpiece attached to at least one rotary head included in the table when necessary;
• spouting a machining liquid through a machining liquid spouting nozzle included in a machining liquid supply means connected through piping to a machining liquid source toward a machining region in which the tool engages with the workpiece;
• moving the machining liquid spouting nozzle of the machining liquid supply means for positioning in radial directions with respect to the tool according to nozzle moving commands corresponding to dimensions of the tool;
• and moving the machining liquid spouting nozzle of the machining liquid supply means around the tool according to nozzle moving commands corresponding to a position of the machining region in which the tool engages with the workpiece defined by a workpiece machining program.