Danieli & C. Officine Meccaniche S.p.a.

Ivan Paiaro

Andrea De Luca

Alfredo Poloni

Giuseppe Bordignon

Miroslav Zerajic

Rolando Paolone

Gianni Zomero

Dario Lestani

Compact plant for making steel bars and profiles with which, starting from the scrap, it is possible to obtain the finished product, for example bars with commercial length from 6 to 18 meters, pre-packed, packaged and ready for sale, with all the stations placed in line and operating continuously. All the stations are arranged in reduced spaces, thereby reducing both investment costs and plant management costs, and decreasing production times. Advantageously, the plant of the invention incorporates an extremely compact bar packaging apparatus which, through an innovative arrangement and innovative operating method of the components thereof, allows a further reduction in length.

Compact plant for continuous production of bars and/or profiles

A laying head for forming coils using continuous and substantially rectilinear rolled products such as rods or wire, having vibration damping means integrated in one of two rotor supports (), preferably the one on the rolled product outlet side. Said means comprise a plurality of coils (&#x2033;) arranged around the rotor (), rotating about its axis (X), which generate a magnetic field actively controlled by a computer, the resultant force of which is perpendicular to the axis (X) and of a predetermined intensity so as to eliminate the inertial forces generated by the mass imbalances. Alternatively, the damping means incorporated in one of the supports are comprised of oil film bearings.

Laying head with a vibration damping device

Coiling device ('R') and relative method for a windable long, metal product (). The device ('R') comprises a mandrel () having a substantially circular transverse section and rotating around a horizontal, vertical or inclined axis, a containing element () to contain the metal product () arranged in correspondence with the mandrel () and substantially orthogonal to the axis, and at least a guide and containing device () able to be driven between a first working position wherein it cooperates with the mandrel (), and a second inactive position wherein it is arranged distant from the mandrel (). The containing element () comprises an annular channel () made in proximity with an outer surface of the mandrel (). The guide and containing device () comprises a groove () which defines an accompanying guide for the metal product () along an outer circumference of the mandrel () towards the annular channel (), when the guide and containing device () is in the first working position.

Device and method for forming coils of rolled or drawn long products

Coiling method and device ('R') for a long product (). The device ('R') comprises a mandrel () with a substantially cylindrical shape and rotating around its own axis, and a containing element () coaxial with the mandrel (), rotating together therewith and defining a front wall () to contain the coil of product () to be formed. The containing element () comprises an annular channel () to clamp the leading end of the product () around the mandrel (). The containing element () is mobile axially with respect to the mandrel () between a first position wherein the leading end of the product () is inserted, and a second position wherein the coil of product () is completed.

Coiling method and device for rolled or drawn long products

A bar speed changing device () comprising a pair of upper rollers () and a pair of lower rollers (). Said device receives a bar section with the rollers () in the open position and rotating at a given speed. Upon leaving the device () said sections are fed into axially arranged peripheral seats () of rotating drum channels. Control devices calculate the speed at which the bar section must be released, upon completion of the braking action, according to the position that said section must occupy in one of said seats and on the basis of the bar-seat friction coefficient. When the rollers () receive the bar, they turn at the calculated release speed. At a predefined moment, such to enable braking in the correct space and time, the four rollers close on the section and exert the braking action, exploiting the dynamic friction between the roller-section.

Bar speed changing device

Plant for packing bars after the rolling cycle comprising a feeding unit, a shear () for cutting the bar to size, a pair of deflector devices (), () and a bar braking device. The bar segment deflector devices send the bar segments into seats () arranged along the perimeters of pairs of rotating cylinders (), (), (), () and parallel to the axis of the cylinder, after making them pass through a bar braking device () to slow the bars down to the predefined speeds. The bars are unloaded from the seats onto conveyors (), (), (), () and transported to a station where they are packed into bundles.

Bar packing plant and relative process

Support bearing for a roll () for immersion in liquid metal, comprising an internal rotating bush () fitted coaxially on a pin () at the end of the roll (), and rotating inside an external bush () fixed to a supporting arm () of the roll (). The first bush () is provided with an axial helical groove () on its outer surface and the second bush () is provided with a toroidal-shaped convex outer surface to allow rotation without friction inside the cylindrical ring of the supporting arm ().

Support bearing for a roll

Coiling device () and relative coiling method for rolled or drawn long products, comprising a mandrel (), arranged cantilevered and rotatable with respect to a central longitudinal axis (X), and on which the long products are wound in adjacent and superimposed spirals (), in order to form a compact coil () having the geometric shape of a circular ring with lateral flanks substantially orthogonal, or very angled, with respect to the central longitudinal axis (X). The mandrel () comprises a flange () substantially orthogonal, or very angled, with respect to the central longitudinal axis (X) which defines a first lateral flank of the coil (). The mandrel () also comprises first arm elements () which define the cylindrical surface of the core that forms the coil (), and second arm elements (), opposite the flange (), which define a second flank of the coil. The first and the second arm elements () are mobile between a first coil-forming position and a second coil-removal position.

Growing community of inventors

Ronchi dei Legionari, Italy

Ivan Paiaro