TVU vertical turning lathe from DS Technology

Manufactured by DS Technology group member, Berthiez, at its factory in St Etienne, France the turning-milling-grinding centre is based on a compact, stiff, cast iron structure of thermo-symmetrical design with integral temperature compensation. The 'high speed' configuration has a 630 to 800 rpm table for workpieces up to 3.5 tonnes, while the 'heavy load' configuration, has a 220 to 500 rpm table capable of supporting 20 tonne components. Drive to the table, which can be up to 2.5 m in diameter, is via a two-stage gearbox and backlash-free chain. The crossrail/carriage assembly has direct motor and ballscrew drive to traverse six roller bearing packs along two linear guideways. Optical linear scales provide absolute ram positioning and feedback. The vertical position of the crossrail is optionally adjustable in 100 mm increments to ensure that the ram is in the most rigid and advantageous position for machining, depending on workpiece height. The vertical movement of the ram itself similarly employs twin guideways, six roller packs and linear scales, the stroke being 1,000 to 1,500 mm, according to machine model with feed rate is up to 20 m/min. Ram section is 250 by 250 mm and through coolant is provided, with a 400 bar high pressure coolant option. The ram can deploy either a CAPTO C6/HSK 63-80 turning tool or can have integrated within it a 40 kW spindle motor for milling at up to 6,000 rpm/500 Nm or a 25 kW, water-cooled electro-spindle for grinding at 8,000 rpm/200 Nm. C-axis positioning of the table is in 360,000 increments. Control is provided by the highly capable Siemens 840D CNC system.