TPT November 2020

T E CHNOLOG Y

T E CHNOLOG Y

High-tech tube and bar straightening system for cold and hot metal profiles

VIOLI SRL, a company that specialises in the design and production of industrial machinery dedicated to the manufacture of tubes and wires – typically used in the processes of drawing, winding, straight- ening and cutting – was founded in the 1992 by Mr Giorgio Violi. Violi Srl now boasts an established presence on the main international markets offering a range of reliable and cutting edge straightening machines able to process cold and hot metal profiles. The full line includes equipment for straightening tubes or bars made of steel or other metals having a circular, cross or complex profile and ensuring excellent results and high productivity. The MRT Series for tubes and bars is equipped with straightening groups consisting of hyperbolic pairs of rollers obliquely mounted and having an inclination opposed to each pair. The orientation of the axes, combined with the hyperbolic geometry of the rollers, allows the profile to forward rotate.

All the rollers are mounted on mo- torised and independent supports flow - ing within bushings that allow the opera- tor to modify the height and the angle of the system. Acting on the vertical axis it is possible to adapt the straightening machine to different diameters and to correct the line of the advancement of the profile in order to create a process of metal stressing and to get products per- fectly straight. Two motors with inverter and switch to reverse the direction of the motion allow the operator to control and adjust the speed of advancement of the profiles under process. The line MRT includes three models with different capacities: MRT5 for tubes and bars with diameter from 3 to 11mm, MRT5M for tubes and bars with dia- meter from 10 to 30mm and MRT5M50 for tubes and bars with diameter from 25 to 50mm. The wire-straightening machine with fly cutting systemmodel VM/MRTVS-C is designed to straighten and cut to length

– through a cutting system with circular saw blade or shears – metal wires with diameter from 1 to 8mm without stopping the advancement during the cutting operation. The machine is composed of a coil holding system, a central dragging group, a rotating straightening group and a cutting group. The range of the Violi straightening machine is completed by the RPD Series, a family of products for square or rectangular profiles to process hot or cold drawn bars of different thicknesses and widths. The devices consist of motorised rollers adjustable in height with decimal display system; acting on the vertical axis is possible to correct the line of the advancement of the profile in order to get perfectly straight products. Simply replacing the traction rollers is possible to process almost all the profiles included into the working range. Violi Srl www.violimacchine.it

The MRT series from Violi Srl

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NOVEMBER 2020