EOW May 2014

News Technology

Catering for a range of diameters Violi specialises in the design and production of industrial machinery dedicated to the manufacturing of tubes and wires, typically used in the processes of drawing, winding, straightening and cutting. 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 rotate forward. All the rollers are mounted on motorised and independent supports flowing within bushings that allow the operator to modify the height and the angle of the system. Acting on the vertical axis 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 perfectly straight. The MRT line includes three models with different capacities: MRT5 for tubes and bars with diameters from 3 to 11mm, MRT5M for tubes and bars with diameters from 10 to 30mm; and MRT5M50 for tubes and bars with diameters from 25 to 50mm. The mechanical fixtures comprise adjustable support, fast field connector and air purge system for the front cleaning. Sitel Control Srl – Italy Website : www.sitelcontrol.it In control with Sitel In Sitel Control’s treatment lines, the material is first heated to a temperature between about 850 and 950°C, followed by a sharp cooling in water (hardening section) and further heating to a temperature between 450 and 700°C (tempering section). The combination of the two operations constitutes the hard- ening and tempering operation: the hard- ened and tempered material acquires a structure with a very fine grain with a considerable increase in the limit of elasticity, flow limit and resistance to tensile stress. For a correct thermal treatment of material, a fibre optic infrared thermometer is used, the model Fibratemp, that is extremely compact with a measurement spot of 1.6mm at 300mm distance, and provides a high efficiency laser pointing system. The optical measuring head and the optical fibre can stand ambient temperatures up to 315°C without cooling. These thermometers have a range of temperature from 250 to 600°C and from 600 to 1,200°C, with response time of 20ms and a precision of 0.25 per cent. The output signal is analogue 4 to 20 mA or digital RS485 to be easily interfaced with thermal regulation systems. ▲ ▲ The Fibratemp from Sitel Control

Violi Srl – Italy Website : www.violinmacchine.it

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May 2014