Danobat MTG Vertical

The Danobat MTG Vertical combines hard turning and fine grinding on a vertical table for rings up to 1,000 mm (39.4 in) in diameter and 300 mm (11.8 in) in height. It is the vertical counterpart of the MikroTurnGrind horizontal hybrids, and the only vertical hybrid Danobat lists.

How the two processes share one machine is stated in a single table row: positioning is by a RAM in the Z axis by means of a Hirth coupling. The option list adds that the turning RAM and the grinding spindle are changed out, and names a 46-position tool changer. So the tool carrier itself is exchanged between processes and located on a toothed coupling, which is a rigid, repeatable way to index. A dresser unit is listed with the grinding spindle.

Spindle speed is 800 rpm, four times the 200 rpm of the turning-only Mikroturn Vertical 1000V2 at a similar diameter. That fits a machine that must also drive the part for grinding and reach smaller diameters. The table spindle is hydrostatic with guaranteed runout of ≤ 0.1 µm, and the hydrostatic guideways give 1 µm positioning and 0.2 µm repeatability. Danobat's headline for the machine is ≤ 2 µm form and size tolerances.

At 18.3 m² (197 sqft) it needs about half the floor of the Mikroturn Vertical 1000V2, which is listed at 36 m² (387.5 sqft). The control is Siemens Sinumerik One, with 0.01 µm resolution given in the text. Danobat describes the machine as easily and quickly converted to a different type of workpiece, which it presents as the saving in a production environment with small to medium batch sizes.