Innocenti Santeustacchio S.p.a.

Innocenti Santeustacchio

Jean P Calmes

Teresio Passoni

Filippo Cattaneo

Aurindo Nessi

Edgardo Gnecchi

Alberto Mascheroni

A device for locking and releasing the mandrel-holding carriage of a piercing pressure mill, the device comprising at least one lever having an end pivoted to a horizontal pivot perpendicular to the mandrel axis, the other end of the lever being free and removably engaging an abutment formed in the carriage, and at least one substantially toggle mechanism having one end pivoted to the lever which cooperates with a means for actuating the mechanism to form a double toggle for angularly moving the lever around its pivot axis from a position in which its free end engages the abutment to a position in which its free end is completely released from the abutment.

Device for locking and releasing the mandrel-holding carriage of a

The present invention is directed to a pressure and piercing mill for converting a square bar, coming from a bar rolling mill or directly from a continuous casting plant, into a round, axially pierced blank. The basic machine includes inlet and outlet guide members which are positioned adjacent to a pair of rolling cylinders having round grooves and a mandrel which extends along the rolling axis and from the outlet side of the guide members. In addition, a pushing member is provided for driving the square bar through the inlet and outlet guides, the rolling cylinders and against the piercing bit. The present invention is directed to an improved inlet and outlet guide members which ensure that the blank is accurately centered on the rolling and piercing axis during its travel through the pressure and piercing mill. This improved centering of the square bar is achieved by providing an inlet guide which includes a rectilinear tunnel having a square cross section and made of four linear groups extending parallel to the rolling axis and held independently of one another by a stationary frame. Each linear group comprises a longitudinal, rigid, internal, flat rectilinear wall. At least two consecutive linear groups are movable in a direction perpendicular to the rolling axis when a predetermined pressure is exerted on the flat rectilinear walls of the consecutive linear groups from within the rectilinear tunnel.

Lead-in guideway for a rolling and punching machine

A device for controlling the speed of a mandrel in a continuous retained-mandrel rolling mill, such device comprising a rod having a double rack provided at one end with a means for removably securing an end of a mandrel and a number of pinions engaging the rack on the rod, each pinion being driven in rotation by a corresponding motor-driven shaft which, via respective clutches is connected to a motor and speed-reducing group provided with a brake for each motor-driven shaft. Further, the device includes a second set of pinions engaging the rack on the rod, each pinion being driven in rotation by a corresponding motor and speed-reducing group provided with a brake.

Device for controlling the speed of a mandrel in continuous

The invention relates to a housing for a rolling mill for producing axially bored cylindrical blooms from square bars, the housing being of the kind substantially comprising a pair of cogging rollers having round grooves and associated bearing chocks mounted in the housing, an inlet guide for bearing a square bar to be rolled, an outlet guide for the board, rolled cylindrical bloom, and means for adjustably positioning the inlet guide relative to the rolling axis.

Housing for a rolling mill

In the rolling of seamless tubes using a mandrel which is inserted in a hollow bloom as it is advanced through a rolling mill, the cooling of the mandrel after the tube rolling stage is effected, for example by passing the mandrel through a cooling bath, as the mandrel is returned to a ready position upstream of the mill along a return path which is at one side of the rolling axis, so that while this mandrel is being cooled a further rolling operation can be carried out using another mandrel, the mandrels being moved in a closed cycle of successive rolling and cooling stages.

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Lausanne, Switzerland

Jean P Calmes