Thermal growth control for accurate milling

The sensors enable enhancements in accuracy by giving up to 35% improvement in the minimisation of Z-axis thermal displacement against previously used machine tool technologies.

Able to produce 5-axis cycles on workpieces within an envelope of 750mm diameter by 525mm high, the Mitsui Seiki Vertex 55X III, now available through 2D CNC Machinery incorporates rapid traverse rates of 48m/minute to positioning accuracies of ±1µm over the 550mm in X by 600mm in Y and 500mm in Z-axis travels. Meanwhile, small point-to-point surface movements are also realised due to the advantage gained by greater rigidity of the machine design.

Workpieces are held upon a 360°, 50rpm C-axis table of 400mm diameter able to support loads of 350kg. The A-axis is +15 to -105° while being able to work to a positioning accuracy of ±2 minutes and with a repeatability of ±1.5 minutes.

Weighing in at 9.5 tonnes, rigidity in the bed and castings is paramount in maintaining consistent three-dimensional component accuracy. The 40 taper spindle power is 18.5kW giving 25,000rpm with 28.6Nm of torque available. Tool storage capacity is 40 positions for tools up to 90mm diameter (125mm with adjacent pockets left empty) by 300mm in length.

2D CNC www.2DCNC.co.uk