Doosan Releases Single-Table DHF 8000 Variant

Doosan Machine Tools has launched the DHF 8000ST, a single-table version of the DHF 8000 five-axis horizontal machining center. This new model incorporates a turning function and offers a smaller footprint by eliminating the pallet changer. Doosan developed this variant to support heavy equipment manufacturers and other companies who machine large-diameter components that require turning.

The nodding head spindle and direct-drive B-axis rotary table allow the DHF 8000ST to handle a complete range of machining and turning processes from roughing to finishing in a single setup. The company says this ability to work on multiple sides provides increased parts accuracy, and that the configuration makes quick work of multi-face workpieces and five-axis simultaneous machining of complex shapes.

Like the DHF 8000, the nodding head spindle has a stroke of +60 to -100 degrees (up/down) with clamping torque of over 3,600 foot-pounds. The DHF 8000ST includes a 47-horsepower HSK100-T spindle taper with a 6,000 r/min gear head spindle, with optional 15,000 r/min high-speed spindles available.

This scaled-up HMC supports workpieces weighing up to two tons, and its 1,000-mm-diameter (39.4”) pallet offers a large work envelope. Its working area holds parts up to 1,600 mm (62.9”) in diameter and 1,400 mm (55.1”) in height.

The DHF 8000ST includes cross roller linear guideways for extra rigidity. The Y and Z axis are fitted with dual ball screws to ensure greater structural stability and accuracy, while the column is designed with high static and dynamic rigidity to provide optimum machining performance. Linear scales on each axis maintain superior positioning accuracy.

A thermal compensation system turns on if thermal growth is detected, with cooling systems for the spindle and ball screws also assisting with thermal stability. A standard 120-tool magazine is expandable to 376 tools. The DHF 8000ST comes equipped with a Siemens 840D control.