CHUCK FOR A COLD-PILGERING MILL

摘要

The present invention concerns a clamping chuck for a cold pilger rolling mill, comprising clamping a sleeve and at least two clamping jaw carriers. The chucks known from the state of the art have a hollow-cylindrical guide sleeve, into which are inserted from the end clamping jaws which are pressed against the tube shell by means of a clamping sleeve which is also to be introduced from the end of the guide sleeve. In comparison with that state of the art the object of the present invention is to provide a clamping chuck for a cold pilger rolling mill, which permits easy changing of the clamping jaw carriers and thus quick and inexpensive adaptation of the cold pilger rolling mill to tubes of differing diameters and wall thicknesses. To attain that object there is proposed a clamping chuck for a cold pilger rolling mill comprising a substantially hollow-cylindrical clamping sleeve having an inner peripheral surface and a cylinder axis, wherein the inner peripheral surface has at least one clamping portion whose surface includes an angle with the cylinder axis in the axial direction, and with at least a first and a second clamping jaw carrier, wherein at a first end the clamping sleeve has at least one first slot-shaped opening so that a clamping jaw carrier can be introduced into the clamping sleeve in the radial direction through the opening, wherein each clamping jaw carrier has an outside surface extending substantially parallel to the cylinder axis and a clamp surface which is arranged opposite the outside surface and which extends substantially parallel to the cylinder axis, wherein the outside surface and the clamp surface define a wedge, and wherein the clamping sleeve is displaceable parallel to the cylinder axis and relative to the clamping jaw carriers in such a way that the clamping portion of the clamping sleeve engages with the outside surface of the clamping jaw carriers.