Durma HD-TC 120350 MEGA

Twelve-metre structural sections go through the Durma HD-TC 120350 MEGA in one piece. This tube and profile laser takes material up to 12,500 mm (492.1 in) long and unloads finished parts up to 12,000 mm (472.4 in), in round tube to Ø350 mm (13.8 in) and square or rectangular profile to 350 x 350 mm (13.8 x 13.8 in).

Steel construction is the obvious use. Columns, beams and truss members arrive from the mill in 12 m lengths, and a machine that accepts them uncut removes a sawing step and the handling around it. A single workpiece may weigh up to 1,500 kg (3,307 lb) at up to 125 kg/m. The HD-TC 60350 MEGA, with the same chucks, stops at 800 kg (1,764 lb).

Both ends of the line are chain-driven and standard: a chain loader that works as a semi automatic loading unit for material 4,500-12,500 mm long, and a chain unloader. Durma lists the minimum remaining material as 0 mm, so the full bar can become parts.

The moving mass shows in the dynamics. The A axis rotates at 320 °/s, the X axis travels at 80 m/min and the Y and Z axes at 30 m/min. Accuracy is stated as on the smaller machines, ±0.2 mm positioning accuracy and ±0.05 mm positioning variation, with Durma's caveat that warped profiles affect the cut tolerance and that laser centring is recommended. Open L, U and H profiles up to 350 x 350 mm (13.8 x 13.8 in) can be cut. The chuck centre is 1,400 mm (55.1 in) high.