Tool coupling
AssigneeFried. Krupp Gesellschaft mit beschrankter Haftung
InventorRainer von Haas
Life of this patent
Estimating the term…
Abstract
A tool coupling for connecting a tool head to a tool holder to secure the tool head against rotation and provide axial prestress. The tool head, which serves as a cutting tool, includes a shank having at least a portion which is conically configured, a threaded bore, and an annular contact collar. The tool holder includes a sleeve-shaped receiving bore corresponding to the shank, at least a portion of the receiving bore being conically configured, a tightening screw, and an annular contact face. An additional bore in the shank of the tool head ensures a prestress between the shank and the tool carrier including the receiving bore, and such prestress is not entirely relieved even if lateral forces act on the tool head. This keeps the tool head from vibrating in the receiving bore.
Claims20
A tool coupling arrangement, comprising:
- a tool head which serves as a cutting tool and which has a longitudinal center axis, the tool head additionally having a threaded bore and an annular contact collar;
- a tool holder having a sleeve-shaped receiving bore, with at least a portion of the receiving bore being conically configured and having a predetermined cone angle, the tool holder additionally having an annular contact face;
- and
- tool coupling means for connecting the tool head and the tool holder so that the tool head is secured against rotation and is axially prestressed, the tool coupling means including a shank attached to the tool head for insertion into the receiving bore, at least a portion of the shank being conically configured and having a cone angle that is equal to the cone angle of the receiving bore, the shank having a frontal blind bore which extends centrally along the longitudinal axis of the tool head, and a tightening screw mounted on the tool holder at a position to engage the threaded bore of the tool head,
- wherein the blind bore has a frontal face and a bore diameter at the frontal face, wherein the shank has a region of smallest diameter, and wherein the bore diameter at the frontal face ranges from about 70% to about 97% of the smallest diameter of the shank, and
- wherein the blind bore has a depth and the shank has a length, the depth of the blind bore being greater than 1/2 the length of the shank.
A tool coupling arrangement, comprising:
- a tool head which serves as a cutting tool and which has a longitudinal center axis, the tool head additionally having an annular contact collar;
- a tool holder having a sleeve-shaped receiving bore, with at least a portion of the receiving bore being conically configured and having a predetermined cone angle, the tool holder additionally having an annular contact face;
- and
- tool coupling means for connecting the tool head and the tool holder so that the tool head is secured against rotation and is axially prestressed, the tool coupling means including a shank attached to the tool head for insertion into the receiving bore, at least a portion of the shank being conically configured and having a cone angle that is equal to the cone angle of the receiving bore, the shank having a frontal blind bore which extends centrally along the longitudinal axis of the tool head,
- wherein the blind bore has a frontal face and a bore diameter at the frontal face, wherein the shank has a region of smallest diameter, and wherein the bore diameter at the frontal face ranges from about 70% to about 97% of the smallest diameter of the shank, and
- wherein the blind bore has a depth and the shank has a length, the depth of the blind bore being greater than 1/2 the length of the shank.
Dependencies are inferred from the claim text.