To carry in and out a part to a machining center by using a holder for holding the part installed on a main spindle.
The holder 1A for holding the part is installed in a tool installing part 21a of the main spindle 21 moved to and positioned on the mutually orthogonal X axis, Y axis and Z axis. A part taking-out position 27 of a carrying-in passage 14 for carrying the part in the machining center 20 and a part carrying-out position 28 of a carrying-out passage 16 for carrying out the part are arranged in a movable range of the holder 1A. Thus, the part can be carried in a machining jig 17 from the part taking-out position 27 by using the holder 1A, and the part can be automatically carried out to the part carrying-out position 28 from the machining jig 17.
Tetsuro Maki
Maki Reiko