DEEP HOLE PROCESSING DEVICE AND DEEP HOLE PROCESSING METHOD

摘要

PROBLEM TO BE SOLVED: To provide a deep hole processing device capable of improving durability of a guide bush.;SOLUTION: A deep hole processing device 1 applies drilling and the like to a workpiece 2 by rotating a blade tool 20 around an axis. A guide bush 30 provided away from an outer periphery of the blade tool 20 on the radial outside of the blade tool 20 has an exhaust nozzle 31 for emitting a jet of oil toward the outer periphery of the blade tool 20. Thus, since an oil film is formed between an inner wall of the guide bush 30 and the blade tool 20, the blade tool 20 is rotated in the state of noncontact with the inner wall of the guide bush 30.;COPYRIGHT: (C)2015,JPO&INPIT