Innse Innocenti Santeustacchio S.p.a.

Innse Innocente Santeustacchio S.p.a.

Innocenti Santeustacchio

Edgardo Gnecchi

Filippo Cattaneo

Jean P Calmes

Giacinto Dal Pan

Apparatus is provided for supporting the mandrel back-up bar of a press-piercing rolling mill. The apparatus comprises a plurality of constraining elements supported by a base in two lines disposed parallel to and symmetrically with respect to the rolling and piercing axis of the rolling mill. All the constraining elements of each line are mounted on a single beam which is supported on horizontal guides perpendicular to the rolling axis and adjustable in position on the guides. This arrangement facilitates the simultaneous adjustment of all the constraining elements making up a line.

Apparatus for supporting the piercing mandrel back-up bar of a

A billet centering and control guide for an entry guide for a PPM, which is of the rectilinear-tunnel type and is formed by two L-shaped portions which are hinged together about an axis parallel to the axis of the guide. The control guide can be opened essentially like a valve to allow the removal of a billet which may be trapped therein.

Billet centering and control guide for the entry guide 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.

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Sesto S. Giovanni, Italy

Edgardo Gnecchi