Komet Group Gmbh

Hartmetall-werkzeugfabrik Paul Horn Gmbh

Komet Praezisionswerkzeuge Robert Breuning Gmbh

Uwe Kretzschmann

Benno Spors

Henry Schuett

Jacek Kruszynski

Erkan Hodza

Matthias Oettle

Matthias Luik

Wolfgang Bierl

Hendrik Nitzsche

Rico Schneider

Henry Schütt

Andree Fritsch

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

A rotating machine tool has a base with a rotating axis, at least one pocket formed in the base and at least one blade support holding a cutting plate. Two side surfaces of the blade support sit against a side support surface, respectively, the blade support side surfaces making an angle between them, and the base of the blade support sits against a base support surface of the pocket, the blade support being clamped in the pocket removably by way of a clamp element. The cutting plate protrudes over the blade support with an effective blade and over the base outward.

Machine tool with adjustable cutting insert

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

A junction between two components of a tool system, that rotates about an axis of rotation, includes a conical seat, on the first component, coaxial to the axis of rotation and which is defined by an annular front face. The second component carries a coupling having a conical surface complementary to the conical seat and an annular end face resting against the front face. A tie bolt axially projects beyond the free end of the coupling pin and engages, in a cavity adjacent to the seat. The junction also has tensioning elements that are actuated from the exterior for mutually bracing the components, which are radially guided in the first component, and which act upon the tie bolt and are functionally linked with joint actuating means for adjustment between detached and tensioned positions. The tensioning elements include ejection portions that can be fitted with a rotatably received rolling element.

Junction between two components of a rotating tool system

The tool has a tool shank (which may be hollow) ( ), whilst the machine spindle has a connecting sleeve ( ) containing a recess ( ) to accommodate the tool shank. A clamping mechanism ( ) is located in the area between the tool shank ( ) and the connecting sleeve ( ). This mechanism has at least one clamping element ( &Prime;), with radial movement, which acts as a wedge drive, providing axial clamping movement between the tool shank ( ) and connecting sleeve ( ). The clamping mechanism comprises an actuating nut ( ), which screws onto an exterior thread ( ) on the connecting sleeve ( ) and is coaxial in relation to the spindle axis. During the clamping procedure, the axial movement of the actuating nut can be converted into the radial movement of the clamping element ( &Prime;), with the help of at least one connecting link ( &Prime;).

Growing community of inventors

Besigheim, Germany

Uwe Kretzschmann