WERKZEUG ZUR KALTDEHNUNG EINER BOHRUNG DURCH EIN WERKSTÜCK

摘要

- Tool for cold expansion of a bore through a workpiece.- The expansion tool comprises a tool body (4) for manipulating the tool, a drive module (23) for driving in rotation a cylindrical needle cage (5) in the bore (2), the cylindrical needle cage (5) having an axis of revolution (6) around which the needle cage (5) is intended to enter rotation in the bore (2), the needle cage (5) having needles (7) configured to move radially (9) away from the axis of revolution (6) in order to harden the bore (2) while the needle cage (5) is rotated by the drive unit (23). The expansion tool (1) also comprises a rod (11) having a burnisher (14) for radially moving the needles (7) of the needle cage (5) when the burnisher (14) passes through the needle cage (5) thanks to the translation of the rod (11). The rotation of the needle cage (5) makes it possible to work the whole internal surface of the bore (2).