ACCESSORY FOR SHARPENING OF TWIST DRILLS Russian patent published in 2009 - IPC B24B3/24 

FIELD: technological processes, metal working.

SUBSTANCE: invention is related to the field of machine building and may be used in sharpening of twist drills at tool and cutter grinding machines or turning lathes. Drill holder is installed on rod journal with the possibility of rotation around rod axis and displacement along it. On basic plane of drill holder two replaceable clamp prisms are installed for drill location. One of prisms is installed with the possibility of adjusting displacement perpendicular to drill axis, and the other one is functionally connected to the first prism. Eccentric thrust that alternately interacts with side surfaces of slot arranged at the end of drill holder body is installed on rod with the possibility of rotation relative to its own axis. Rod is hingedly connected to stand with the possibility of fixation of specified angle position of rod according to scale arranged on stand.

EFFECT: higher quality of drill sharpening, simplified design of accessory and provision of its universality.

2 cl, 3 dwg