Tavagnacco, Italy
Tavagnacco, Italy

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Tomba M.,PERT srl | Zuccato M.,PERT srl | Fontanini A.,PERT srl | Tomba N.,PERT srl
SEAISI Quarterly (South East Asia Iron and Steel Institute) | Year: 2013

PERT has developed and patented a new generation of rolling mill stands for long products, called BiSupport (BS) stands. Being a further development of the traditional housingless and cantilever stands, the new BS-type stand is a valid alternative to conventional equipment. The goal of the new stand design is a dramatic increase in rolling load, faster production program changes, fast installation, lower civil works, lower building dimensions, significant productivity improvement, lower operating costs, and lower inventory and thus cost of spares.


Tomba M.,Pert Srl | Tomba N.,Pert Srl | Zuccato M.,Pert Srl | Fontanini A.,Pert Srl
MPT Metallurgical Plant and Technology International | Year: 2014

A wide range of finishing blocks has been designed for the production of both rebar and wire rod - composed of three different blocks, amounting to a total of eight varieties, for different plant capacities and finished product qualities. They can also be tailored to the product mix and the technical know-how of the operators.


Zuccato M.,Pert Srl | Tomba M.,Pert Srl
MPT Metallurgical Plant and Technology International | Year: 2010

The Italian engineering company Pert has now developed a new mill stand type Bi Support Stands to achieve higher yields in new and in revamped rolling mills with low investment costs. The stand features a compact and rigid construction of the body, which is made of fabricated and not of cast components. Due to the new design, the rolling stands are extremely stiff. Adjustment of the ring center distance is by means of simultaneous opening/closing of both shafts by screwing down gears which directly act on eccentric sleeves. Easy access to the stands facilitates ring change, removal of cobbles, maintenance, and regulation of guides. Due to the fact that horizontal and vertical stands are of the same design, the number of operational spare parts is minimized. Bearings and even the spindles are protected against water and scale. Their reduced dimensions make the stands suitable for installations with limited space or for revamping existing mills.


Zuccato M.,Pert srl | Tomba M.,Pert srl
MPT Metallurgical Plant and Technology International | Year: 2011

The new generation finishing block, 2XTechnology®, has been developed with the objectives to achieve higher yields in new and revamped rolling mills while reducing investment efforts. The technical characteristics of the block include round finishing, maximum design speed of 45 m/sper stand, maximum rolling speed of 40 rn/s per strand, and fixed rolling axes. At the rolling stands, ring shafts are installed on the roller bearings for radial loads and spherical roller bearings for axial loads. The ring shafts and bearings are installed on eccentric bushes, which if rotated change the distance between the centres of the rings. Pinion stands with bevel gear reduction units distribute the movement to the two rings shafts. By installation of the new stand type and the new finishing block, production of the plant can be increased and the final product quality is improved.


Zuccato M.,Pert srl | Tomba M.,Pert srl | Fontanini A.,Pert srl | Tomba N.,Pert srl
MPT Metallurgical Plant and Technology International | Year: 2013

Pert has developed a new generation of its Bi-Support rolling stands. The second-generation BiSupport stands provide the possibility of improving the quality of the final product, cutting changeover times and downtimes for maintenance, reducing civil works and spare parts cost. The Bi-Support stands, however, feature higher stiffness and better load distribution into the housing, reducing mechanical yielding. As a consequence, dimensionally stable products can be manufactured reliably within the standard tolerances or even better. The Bi-Support stands are designed to provide a force transmitting surface that is five times bigger than in housingless stands. The Bi-Support stands do not need any operator intervention in the rolling line, as with cantilever stands where the ring changes are to be performed in the working area of the plant. The Bi-Support stand bearings have an increased working life, which is 2.5 times longer than in common housingless stands.


Fontanini A.,Pert srl | Tomba N.,Pert srl | Zuccato M.,Pert srl | Tomba M.,Pert srl
MPT Metallurgical Plant and Technology International | Year: 2013

Pert has developed a new locking system for finishing blocks of bar and wire rod mills. With this system, ring changing can be accomplished in less than one minute. Presently, without the system, four to five minutes are required. Moreover, the effort involved in ring and groove changing is drastically reduced. The new system can be introduced without changing the mill configuration. By installing the system on existing blocks, its advantages can be directly tapped. The system is adaptable to all types of finishing blocks as well as cantilever stands in intermediate or finishing mills.


Tomba N.,Pert srl | Tomba M.,Pert srl
MPT Metallurgical Plant and Technology International | Year: 2015

The Pert Pocket Mill PPM was developed to reduce the overall investment as much as possible, while providing highly cost-effective steel production. The PPM Pert Pocket Mill has been developed for production capacities ranging between 100,000 and 250,000t per year. The main target to be achieved is to reduce the initial costs of a plant. When considering the costs allocated to a plant, the steelmaker must be careful because they may include not only the costs of the equipment, but also the civil works, buildings, auxiliary plants. Pusher-type furnaces are a well-known technology. The use of cast iron or tungsten carbide rolling rings offers a much groove working life compared to common cast iron rolls.


Patent
Pert S.r.l | Date: 2012-02-07

A hot-rolling machine for wire rods includes a number of rolling units arranged one after another along a wire-rod feeding path to plastically deform a high-temperature wire rod moving along the path. Each rolling unit includes a rolling stand arranged on the wire-rod feeding path and two counter-rotating milling rollers are arranged one beside the other, parallel and tangent to one another to form a rolling groove through which the wire rod is forced to pass. A mechanical gear reduction unit is arranged beside the rolling stand to drive simultaneously the two rolls about the respective longitudinal axes. The mechanical gear reduction unit forms, with one rolling stand, a single sectional elementary module structured for being aligned with similar sectional elementary modules, along the wire-rod feeding path and for being mechanically coupled to an immediately adjacent sectional elementary module to form a catenary of rolling units reciprocally connected to transmit torque in cascade from one another.


A wire-rod and the like, hot-rolling machine wherein the two rollers are fitted on respective frustoconical end portions of as many counter-rotating supporting shafts, via interposition of corresponding centering and coupling bushings having a frustoconical internal profile, each of which is fitted on the end portion of a respective supporting shaft, between the supporting shaft and the corresponding roller, and is structured so as to mesh on the supporting shaft so as to be angularly integral to said supporting shaft, and so as to be inserted/wedged between the supporting shaft and the roller thus to center the roller on the supporting shaft and moreover make the roller angularly integral to the body of the supporting shaft. Each centering and coupling bushing is provided with an annular flange having an eccentric lobe-shaped profile and which cantilevered projects from the outer surface of the bushing, at one of the two mouths of the central through hole of the roller, and is designed to engage a corresponding annular groove with eccentric lobe-shaped profile which is formed on the body of the roller at the mouth of the roller central through hole, and has a shape complementary to that of the annular flange.


Patent
Pert S.r.l. | Date: 2012-09-28

Wire-rod hot-rolling machine (1) which comprises a plurality of roller-provided rolling units (2) which are arranged one after the other along the wire-rod feeding paths (p); the roller-provided rolling unit (2) being formed by a plurality of rolling-mills assemblies (3) each of which is provided with a pair of opposite, counter-rotating rolling mill rollers (4), which are arranged parallel and adjacent each other; said rolling-mills assemblies (3) being arranged one beside the other, coplanar to a corresponding reference plane locally perpendicular to the feeding paths (p), each at the feeding path (p) of a respective wire rod (b), and are oriented so that the rotation axes (R) of the rolling mill rollers (4) of the various rolling-mills assemblies (3) are locally parallel to one another while intersecting the lying plane of the feeding paths (p) of the wire rods with an inclination angle (3) greater than 5 and smaller than 85.

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