| 摘要 |
PROBLEM TO BE SOLVED: To provide a machining datum setting method and machine tool for implementing the same method which can easily and precisely set up a machining datum of a rotary tool and workpiece without additional costs. SOLUTION: The machine tool having a function for setting up a machining datum where the rotary tool 12 and workpiece 20 keep in contact with each other comprises a main spindle 5 for rotating the rotary tool 12, a sensor 6 for sensing rotation of the main spindle 5, a work table 7 for retaining the workpiece 20, a drive source 8 for applying load torque which can not make the rotary tool 12 rotate to the main spindle 5 under the conditions that a tip of a cutting edge of the rotary tool 12 keeps in contact with the outer surface of the workpiece 20, and a machining datum setting section 11 for setting up the coordinates as its machining datum when either of the main spindle 5 or work table 7 is jogged so that the tip of the cutting edge moves to separate from the outer surface of the workpiece 20 while the load torque is applied on the main spindle 5 and the rotation of the main spindle 5 is sensed by the sensor 6. COPYRIGHT: (C)2008,JPO&INPIT |
