US 12,296,399 B2
Electrical discharge machining assembly including electrode
Luis Humberto Guzman Trevino, Tampico (MX); Cesar Omar Medina Juarez, San Luis Potosi (MX); and John Casari, Manchester, MI (US)
Assigned to Robert Bosch GmbH, Stuttgart (DE)
Filed by Robert Bosch GmbH, Stuttgart (DE)
Filed on Dec. 10, 2021, as Appl. No. 17/547,998.
Claims priority of provisional application 63/125,531, filed on Dec. 15, 2020.
Prior Publication US 2022/0184724 A1, Jun. 16, 2022
Int. Cl. B23H 7/26 (2006.01); B23H 7/10 (2006.01)
CPC B23H 7/26 (2013.01) [B23H 7/10 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An electrical discharge machining (EDM) electrode, comprising:
an electrode first end;
an electrode second end opposed to the electrode first end;
an electrode longitudinal axis that extends between the electrode first end and the electrode second end;
an electrode axial opening that extends between, and opens at, the electrode first end and the electrode second end;
an electrode first portion that includes the electrode first end; and
an electrode second portion that includes the electrode second end, wherein
the electrode is electrically conductive,
the electrode first portion has a first flexibility,
the electrode first portion includes
an axially-extending fluid path corresponding to the axial opening that allows fluid communication between the axial opening and an exterior of the electrode, and
a second fluid path that allows fluid communication between the axial opening and an exterior of the electrode, the second fluid path extending radially with respect to the longitudinal axis,
the electrode second portion has a second flexibility, and
the second flexibility is less than the first flexibility.
 
7. An electrical discharge machining (EDM) assembly comprising a mounting device that is configured to support an electrical discharge machining electrode relative to a work piece, the mounting device including:
a back plate having a back plate first surface, a back plate second surface that is opposed to the back plate first surface, and a side surface that extends between the back plate first surface and the back plate second surface;
an upright portion that protrudes from the back plate first surface; and
a tubular sleeve disposed in a through hole that extends through the back plate and the upright portion, the through hole aligned with an axis that is perpendicular to the back plate first surface, the sleeve including
a sleeve first end,
a sleeve second end, and
a sleeve inner surface that defines a sleeve passageway that extends between the sleeve first end and the sleeve second end,
wherein the sleeve is disposed in the through hole in such a way that the sleeve first end protrudes from an end of the through hole.