AUTOFRETTAGE MACHINING DEVICE

摘要

Provided is a solution to various limitations caused by product shape and the like. An autofrettage machining device characterized in comprising: a workpiece that is sealed off except for the workpiece end opening and in which a pressurized chamber is filled with a hydraulic oil via the workpiece end opening; a jig capable of being attached and detached from the workpiece, having an internal direct flow channel, and in which the direct flow channel is in communication without leakage with the workpiece end opening via a seal part; a piston for forming a gap having a predetermined average gap size with the inner wall of the direct flow channel provided inside the jig; and a pressurizing unit for driving the piston.