Pioneers in Machining Technology
A new, 5-axis, vertical-spindle machining centre with a working volume of 925 x 1,050 x 600 mm, designated MU-6300V, has been introduced by Okuma, Japan. Availability in the UK is through sole agent, NCMT.
The machine is designed to accept large workpieces up to 830 mm diameter, 550 mm in height and weighing 600 kg. It is ideal for multi-sided machining of complex parts in one hit, especially in the energy and aerospace industries. Rapid traverse at 50 m/min in the orthogonal axes minimises non-cutting times and promotes high productivity.
A rigid and accurate double column structure supports a +90 / -120 degree trunnion table which provides two rotary CNC axes. Twin roller gear cam drives on the trunnion (A-axis) and a direct drive motor for the 630 mm diameter rotary table (C-axis) deliver smooth movements for top quality machining at high speed and accuracy.
The centre of gravity of the trunnion table and hence of the workpiece is low, enabling both heavy duty cutting and high speed finishing. An -L variant of the machine can be supplied that includes the ability to turn components on the table at up to 800 rpm.
Built on Okuma’s Thermo-Friendly Concept structure, which minimises heat generation during machining and compensates for thermal deformation, the machine performs consistently from the first part to the last, regardless of warm-up time or ambient temperature.
Either a BT40 (HSK-A63) or a BT50 (HSK-A100) taper can be specified, respective maximum speeds of the 11 kW spindle motor being 10,000 and 6,000 rpm. More powerful and faster spindle options are available: 22 kW / 15,000 rpm or 26 kW / 12,000 rpm. Tool magazine capacity is 32 pockets, or optionally 48.
The OSP-P300M control, which provides fully interpolative 5-axis machining, is easy to use and has built-in collision avoidance. Geometric error measurement and correction with the 5-Axis Auto Tuning System further raises the accuracy of machined components. When the operator instigates the auto tuning cycle, the machine automatically measures geometric error using a touch probe and datum sphere and performs compensation, using the measurement results to tune the movement accuracy.
Footprint of the machine is less than 5 metres by 3 metres. An automatic pallet changer and extra tool storage can be added at the back to enable automation or inclusion in a flexible manufacturing system, without loss of operator access.