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 fill...

A sealing system which is provided with a pumping means (11) for pumping a fluid to the inside of a workpiece (1), a seal material (12) which is inserted into an opening hole (1a) of the workpiece (1) and which suppresses leakage of the fluid from the open...