| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a machine tool which changes tools more rapidly to improve productivity of machining. <P>SOLUTION: Just after a tool change operation is started, a spindle orientation operation is performed. At the same time a spindle head goes up to a Z-axis original point from a machining position at the Z-axis highest speed (S11). When the spindle orientation operation is completed (S12:YES), the spindle head goes up to an ATC original point where a tool change is made from the Z-axis original point at a Z-axis ATC rising speed (S13). When the spindle head reaches the ATC original point (Z615) (S13), a magazine motor is driven, a tool magazine is turned, and the tool change is made (S14). Next, the spindle head goes down to the Z-axis original point from the ATC original point at the same speed as the Z-axis highest speed (S15). Then the spindle head goes down to a workpiece machining starting position from the Z-axis original point at the Z-axis highest speed (S16), and the workpiece is machined with a tool. <P>COPYRIGHT: (C)2013,JPO&INPIT |
