APPARATUS FOR ELECTROCHEMICAL TREATMENT OF HELICAL TOOTH PROFILE OF INNER SURFACE IN OPENING OF TUBULAR BILLET Russian patent published in 2019 - IPC B23H3/04 B23H9/00 

FIELD: technological processes.

SUBSTANCE: invention relates to an apparatus for electrochemical treatment of a helical tooth profile of an inner surface in a hole of a tubular billet. Plant comprises a frame, first and second devices for holding a workpiece, an electrode comprising a plurality of helical teeth circumferentially with grooves between them, located between the front and rear edges thereof, and a mandrel for mounting an electrode thereon, a drive bar with a central channel attached to the mandrel and the electrode. From the side of the tubular bilge end far from the drive rotation of the drive rod, it comprises a plurality of input radial supports, made with increased mounting hole for sliding reception of edge of tubular billet in comparison with maximum hole of radial support in said first device for retaining tubular billet. On the side of the tubular billet end nearest to the drive rotation of the drive bar, it comprises a plurality of output radial supports, made with increased mounting hole for sliding reception of edge of tubular billet in comparison with maximum hole of radial support in said second device for retaining tubular billet.

EFFECT: broader technological capabilities.

4 cl, 14 dwg