Komet Group Gmbh

Komet Praezisionswerkzeuge Robert Breuning Gmbh

Hartmetall-werkzeugfabrik Paul Horn Gmbh

Komet Group Holding Gmbh

Henry Schuett

Jacek Kruszynski

Uwe Kretzschmann

Peter Leuze

Hans Haidinger

Frank Roeser

Andree Fritsch

Helmut Morlok

Matthias Oettle

Matthias Luik

Benno Spors

Erkan Hodza

Hendrik Nitzsche

Konstantin Baxivanelis

Rico Schneider

Alexander Krause

Juergen Heilmann

Miltiadis Theodorou

Helmut Morlock

Steffen Bezner

Rocco Bellantoni

The invention relates to a drilling tool with a base, having a central axis of rotation, and a drill bit, detachably connected to the base. The drill bit has a coupling part, which can be coupled with a coupling receptacle on the face of the base and has at least two convexly curved centring portions, which are arranged such that they are distributed over the circumference and engage with an exact fit in complementary concavely curved centring portions of the coupling receptacle. The coupling part has a complementary driver stop, meshing with a rotary driver of the coupling receptacle. It is claimed as novel that the centring portions of the coupling part and/or of the coupling receptacle have clamping surfaces, which run onto each other in the manner of a rotary wedge until the driver stop and the rotary driver come up against each other counter to a predetermined direction of rotation.

Drilling tool with drill bit

Cutting tool

An indexable insert for solid drills has four identical cutting edges () arranged at a distance above a supporting base () and each extending between two cutting-edge corners ('). The cutting edges are each bounded by a cutting face () and a clearance face (), with the inclusion of a wedge angle (b). Of the cutting edges (), one in each case is in an active operating position during the drilling operation. To permit optimum adaptation to the cutting conditions and drilling characteristics, varying over the length of the cutting edge of the drilling tool, it is proposed according to the invention that the height (h) of the four cutting edges (), measured from the plane of the supporting base (), and/or the clearance angle (a) varies over the length of the respective cutting edges ().

Indexable insert and use of the indexable insert in a solid drill

The invention relates to a rotating cutting tool, in particular a boring tool for use in machine tools. The cutting tool comprises at least one cutting insert, designed as an indexable insert, that has an active main blade located near a corner of the insert, the outer end of said blade defining a circular flight path radius (R) as the blade rotates, said blade penetrating into a work piece at a pre-determined cutting depth (t) near a pre-formed round hole. Also provided is a secondary blade that is disposed opposite to an advancing direction and that aligns with the outermost end of the main blade, the entire length of said blade having a smaller radius than the circular flight path radius (R) of the main blade, wherein a secondary blade free surface aligns with the secondary blade opposite to the direction of rotation. A unique characteristic of the invention is that the secondary blade free surface comprises a support part disposed at a distance from the secondary blade, the peripheral radius of said part being larger than the circular flight path radius R of the active main blade by an overshoot amount (Y).

Rotating cutting tool with support element

The invention relates to a dual-cutting drilling tool. The drilling tool comprises a base body () which is rotatable about a drill axis () and in which two plate seats () are arranged on the front face thereof for receiving identically configured alternating cutting plates (). The alternative cutting plates are respectively provided on a main cutting edge () thereof with an adjacent first face (), forming a cutting wedge, and a free surface (). The main cutting edges () of the alternating cutting plates () complement each other in the region of a central, offset cutting part ('), forming a cross-cutting edge which is interrupted by a center hole (). The aim of the Invention is to reduce the risk of breakage in the center area of the alternating cutting plates and to provide better guidance for the tool. According to the invention, slanting guiding inclinations () are provided on the free surface of the alternating cutting places (), extending from an apex line () to the center corner () of the plates. The free surfaces () are positively inclined in a radially outer region in the direction of advancement and are negatively inclined in the region of the guiding inclinations () thereof.

Drilling tool with alternating cutting plates and alternating cutting plates for said drilling tool

A solid drill bit for machine tools. has a bit body and two movable inserts located a radial distance apart in insert seats of the bit body. The inserts have a rectangular or quadratic contour, project axially over the bit body with their major cutting edges and overlap in their working area. The outer movable insert projects radially beyond the periphery of the bit body with its outer cutting edge corner and with the adjoining minor cutting edge. Starting from the cutting edge corner, the minor cutting edge is inclined in the direction of the bit body at a setting angle of less than 3.2 &#xb0;. The minor cutting edge has a guiding edge that is slidingly supported against the wall of the bore over at least part of its length due to a radially outwardly oriented thrust force.

Solid drill bit for machine tools

A double or multiple-edged drilling tool has a base body rotatable about a drilling axis, and at least two plate seats arranged on the front face for accommodating identical interchangeable cutting plates. The cutting plates each have a machining face, and a clearance face adjoining a principal cutting edge forming a cutting wedge, and a seat face facing away from the clearance face. A guiding land adjoins radially outwardly through each edge the machining face, the clearance face and optically the seat face. The cutting plates each have a hole for a retaining screw which is screwed into a threaded bore at the front face of the base body. The holes are aligned with their axis perpendicular to the clearance face of the associated cutting plates the threaded bores are aligned inclined to the drilling axis and inclined to each other in the base body.

Drilling tool

A cutting insert shapes metallic workpieces by chipping. The cutting insert is especially suited for use in solid drills or double-bit cutters. It has at least one cutting edge which is delimited by a chipping face and a flank extends between two cutting corners. The cutting edge includes two sections which form an obtuse angle and in the area of a roof-shaped tip merge into each other. The chipping face has a raised shaped chipping element which extends from the inside of the chipping face as far as the cutting edge, from where it reaches beyond the roof-shaped tip partially across the two sections of the cutting edge. The cutting edge sections and the adjoining chipping faces include a step delimiting the shaped chipping element, the edges of which step serve as additional cutting edges of the shaped chipping element.

Cutting insert for shaping by chipping

Growing community of inventors

Sachsenheim, Germany

Henry Schuett