PERFORATING DEVICE FOR A CYLINDRICAL WORKPIECE, METHOD FOR PERFORATING A CYLINDRICAL WORKPIECE, METHOD FOR MANUFACTURING A CYLINDRICAL PRODUCT AND METHOD FOR TESTING A CYLINDRICAL WORKPIECE

摘要

A perforating apparatus for a cylindrical workpiece, comprising: a cradle having a groove extending in a direction horizontally from one end to the other end; a barrier provided at one end of the groove; a drill arranged vertically above the groove and movable in at least one vertical direction, with a drill extending in the vertical direction; and a chuck having a pair of opposed grippers movable with respect to each other in a horizontal direction perpendicular to the direction in which the groove extends and symmetrical with respect to an axis of rotation of the drill, each of the grippers further having a pair of vertically symmetrical inclined surfaces, that go up and down.