Ott Maschinentechnik Gmbh

Franz Friedl

Helmut Heel

Peter Mohr

Hans Kettel

Manfred Fauter

A clamping device for gripping a tool in a carrier. The clamping device has a hollow centering extension or spigot and an abutment surface surrounding it are provided on the tool. A tool receptacle provided in the carrier has a receiving bore matched to the centering extension and an end face surrounding the bore and against which the abutment surface can be pressed by a clamping arrangement. The clamping arrangement comprises a clamping sleeve movable coaxially with respect to the central axis and a clamping ring or collet movable in the opposite direction to the clamping sleeve, both of which are provided with clamping cones facing towards one another. The collet is movable axially on the clamping sleeve by means of a clamping nut screwable on the sleeve. A plurality of clamping jaws surround the clamping sleeve and the collet concentrically and are supported in each case by one end against their clamping cones. The clamping jaws have at their two ends clamping surfaces which cooperate with a conical surface of the tool receptacle and with a conical surface oppositely directed with respect to that conical surface in the centering extension.

Clamping device for gripping a tool in a tool carrier

In a chuck for axially clamping two machine parts which are releasable from each other, on the first machine part (1) are provided a hollow centring attachment (3), a contact face (6) surrounding the attachment, and an annular groove (8) formed on the inside of the attachment (3) and comprising a groove flank (9) tapering conically towards the free end of the attachment. The second machine part (2) comprises a holding bore (4) which is adapted to the attachment (3) and which is surrounded by an end face (7) against which the contact face (6) can be pressed. In the second machine part are provided several clamping jaws (10) which are each supported by a first end (10a) against a groove flank (12) in the second machine part (2). Arranged radially within the clamping jaws (10) and axially movably is a clamping sleeve (15) which comprises in the region of each end (10a, 10b) of the clamping jaws ( 10) a clamping cone (17, 18) by means of which the clamping jaws (10) are movable radially outwards parallel to themselves and their ends (10a, 10b) can be pressed against the associated groove flanks (9, 12). The clamping jaws (10) comprise at both their ends (10a10b) clamping surfaces (11, 14) whose angular position relative to the central axis (A) is adapted to the groove flanks (9, 12), so that during the whole clamping process there is surface contact between the clamping surfaces (b 11,14) and the groove flanks (9, 12).

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Marktoberdorf, Germany

Franz Friedl