EMO 2011 - New Danobat VG series vertical grinding centres display optimum stability and rigidity - Hall 11, stand D39
Last modified 14-09-2011
Indicative of Danobat Group’s innovative approach to design, which sets out to minimise non-productive time such as component, tooling and fixture changeovers, has been a key design consideration from the outset of the new VG series of universal vertical grinding machines.
The VG series is a high capability product for the precision grinding of medium / heavy components such as aircraft engine stators, transmission gears, bearings, etc.
On display at EMO 2011 will be the VG-1000 mid-range model capable of grinding components weighing up to 3000 kg to a maximum ground diameter of 1000 mm. It can also perform hard turning operations, and is available in various configurations. The machine structure is optimised using finite element analysis for optimum stability and rigidity, with all main castings of stabilised pearlitic cast iron. Maximum machining diameter is 1000 mm for the smallest VG-1000 model and 2000 mm for the largest VG-2000 model, with a component height capacity ranging from 500 mm to 1500 mm across the five models.
All models in the VG series are equipped with two independent slides located on heavy duty linear guides. The traversing X axis slide carries a C-axis rotary table while the vertical Z axis slide is fitted with either a grinding spindle or a swiveling B-axis. Movement of the table and vertical slide is driven by a double ball screw with individual servo motors, a design feature that guarantees symmetry and homogeneous movement of the table and vertical axis.
The rotary table is assembled on a hydrostatic bearing with constant pressure, which ensures radial tolerances of less than 2 micron are maintained. Vibration absorption characteristics guarantees a surface finish on the machined component better than 0.3 micron Ra. Options include measuring devices for pre, in and post-process measurements; multi-spindle turret; and a 15/30 tool capacity magazine with tool changing taking place outside of the machining area and performed by robot.