| 摘要 |
PROBLEM TO BE SOLVED: To form a deep hole in a workpiece and carry out an operation for chamfering the circumference of an end part of the deep hole, in one process without causing complication of a device nor complexity of processes.SOLUTION: A drilling device includes: a working device body 10 which has a main spindle O and a drill 12 to be mounted along the main spindle and to be used for forming a deep hole, and is capable of rotating and feeding the drill 12; a clamp device 15 for supporting a workpiece 20 along the main spindle O; and a guide bush 16 for guiding a tip of the drill 12. An engaging part 22 is provided on a rear end side of a drill body 21. A connection part 33 with which the engaging part 22 is engaged to establish connection with the drill 12 is provided in a guide bush body 31. At the point of time when the engaging part 22 is engaged with the connection part 33 to connect the guide bush 16 and the drill 12 to each other, the guide bush 16 rotates together with the drill 12, so that an end part of the workpiece 20 is chamfered by a chamfering blade 32 of the guide bush body 31. |
