COMBINED CUTTING TOOL Russian patent published in 2017 - IPC B23B51/08 

FIELD: machine engineering.

SUBSTANCE: tool comprises a twist drill and connected holder-type counterbore with a body in which slots there are two cutting plates interacting with the supporting walls on the working part of the drill. The drill supporting walls are made in the form of two flats parallel to the drill axis and cross one of the cutting grooves. The body is provided with support platforms, benches and a slit for elastic convergence and separation of support platforms. Each cutting plate has the form of an isosceles right triangle with opposite front and bottom bearing surfaces in a plan view. Cutting edge of each cutting plate is located at the intersection of the front surface with the rear surface inclined toward the side support surface for interacting with the drill flat. Between the front and the lower support surface, there is a fastening hole to fix the cutting plate in the slot of the holder-type counterbore body.

EFFECT: expanded technological possibilities for holes processing.

8 dwg