Piercing device and cheek aspect taking device null

摘要

PURPOSE: To prevent a lower die holder from being damaged even when the variation of the width of sheets is present, and execute the punching or chamfering in the center of the sheets. ;CONSTITUTION: A slider mechanism 64 in a punching device of a sheet 8 consists of a slide plate 52 provided with an inclined surface 52A on each side of the sheet 8, an inclined part 5 1B which is provided with the side surface opposite in parallel to the inclined surface 52A of this slide plate 52, and provided in a projecting manner on each side of the upper surface of a punching die 51, and a knocking part 57 to knock the upper surface of the slide plate 52 when a punching press starts the pressing operation.;COPYRIGHT: (C)1995,JPO