Drilling tool
AssigneeKomet Praezisionswerkzeuge Robert Breuning GmbH
InventorGerhard Scheer
Life of this patent
Estimating the term…
Abstract
A drilling tool comprises a drill tip, a chip removal part which axially adjoins the drill tip, and a drill shank which is positioned at the end of the chip removal part. Two chip flutes extend in a helical manner over the chip removal part starting at the main cutting edges of the drill tip. The drilling tool is separated into two parts in the region of the chip removal part and consists of a base body which is connected to the drill shank as one part and an exchangeable tip made of a harder material which is connected to the drill tip as another part. The exchangeable tip is connectable to the base body in a form-fitting and/or frictional-fitting manner at an axial separation point.
Claims58
A drilling tool, comprising a drill tip having two main cutting edges positioned at approximately equal circumferential distances from each other, and two cutting faces and front rakes adjoining the main cutting edges, a chip removal part axially adjoining the drill tip and formed as a cutting part, a drill shank positioned at an end of the chip removal part opposing the drill tip, and two chip flutes which extend in a helical manner over the chip removal part starting at the main cutting edges of the drill tip, the chip removal part comprising a base body connected to the drill shank as one part and an exchangeable tip connected to the drill tip as another part, which are connectable to each other in a form-fitting or frictional-fitting manner at an axial separation point, the exchangeable tip as a whole comprising a material harder than the base body, the exchangeable tip connecting in one piece to a coupling piece protruding over the side opposing the front rake, the coupling piece having a driver for meshing with a complementary driving part of the base body, the coupling piece having an anchoring pin protruding centrally over the exchangeable tip and insertable into the base body for anchoring therein in a form-fitting or frictional-fitting manner, the coupling piece having at least two partially cylindrical, convex centering sections positioned about the circumference and which fit into a bushing at the base body having partially cylindrical, concave centering sections complementary to the convex centering sections.
A drilling tool, comprising a drill tip having two main cutting edges positioned at approximately equal circumferential distances from each other, and two cutting faces and front rakes adjoining the main cutting edges, a chip removal part axially adjoining the drill tip and formed as a cutting part, a drill shank positioned at an end of the chip removal part opposing the drill tip, and two chip flutes which extend in a helical manner over the chip removal part starting at the main cutting edges of the drill tip, the chip removal part comprising a base body connected to the drill shank as one part and an exchangeable tip connected to the drill tip as another part, which are connectable to each other in a form-fitting or frictional-fitting manner at an axial separation point, the exchangeable tip as a whole comprising a material harder than the base body, the exchangeable tip connecting in one piece to a coupling piece protruding over the side opposing the front rake, and the coupling piece having at least two partially cylindrical, convex centering sections positioned about the circumference and which fit into a bushing at the base body having partially cylindrical, concave centering sections complementary to the convex centering sections.
A drilling tool, comprising a drill tip having two main cutting edges positioned at approximately equal circumferential distances from each other, and two cutting faces and front rakes adjoining the main cutting edges, a chip removal part axially adjoining the drill tip and formed as a cutting part, a drill shank positioned at an end of the chip removal part opposing the drill tip, and two chip flutes which extend in a helical manner over the chip removal part starting at the main cutting edges of the drill tip, the chip removal part comprising a base body connected to the drill shank as one part and an exchangeable tip connected to the drill tip as another part, which are connectable to each other in a form-fitting or frictional-fitting manner at an axial separation point, the exchangeable tip as a whole comprising a material harder than the base body, the exchangeable tip connecting in one piece to a coupling piece protruding over the side opposing the front rake, the coupling piece having a driver for meshing with a complementary driving part of the base body, the coupling piece having an anchoring pin protruding centrally over the exchangeable tip and insertable into the base body for anchoring therein in a form-fitting or frictional-fitting manner, the exchangeable tip including a plane shoulder protruding generally radially over the coupling piece, and the shoulder being pressable against a plane face of the base body by means of a clamping mechanism.
A drilling tool, comprising a drill tip having two main cutting edges positioned at approximately equal circumferential distances from each other, and two cutting faces and front rakes adjoining the main cutting edges, a chip removal part axially adjoining the drill tip and formed as a cutting part, a drill shank positioned at an end of the chip removal part opposing the drill tip, and two chip flutes which extend in a helical manner over the chip removal part starting at the main cutting edges of the drill tip, the chip removal part comprising a base body connected to the drill shank as one part and an exchangeable tip connected to the drill tip as another part, which are connectable to each other in a form-fitting or frictional-fitting manner at an axial separation point, the exchangeable tip as a whole comprising a material harder than the base body, the exchangeable tip connecting in one piece to a coupling piece protruding over the side opposing the front rake, the coupling piece having a driver for meshing with a complementary driving part of the base body, the coupling piece having an anchoring pin protruding centrally over the exchangeable tip and insertable into the base body for anchoring therein in a form-fitting or frictional-fitting manner, wherein the coupling piece has an end face protruding generally radially over the anchoring pin, and the end face being pressable against a bottom face delimiting a bushing.
Dependencies are inferred from the claim text.