The fixed head main spindle and 2-axis secondary spindle Miyano BNE-51MSY also has the advantage of synchronised/superimposed control which is applied to both 12-station all-driven turrets, one with three axes of travel, the other with two axes available. Not only does this configuration effectively reduce cycle times, but it also increases the levels of flexibility to maximise utilisation of tooling and its performance when setting single operational sequences.
The eight tonne Miyano BNE-51MSY fixed head turn-mill centre has been developed to maximise heavy cutting cycles and the potential for creating a fine machined finish while providing a basis for extended tool life especially on difficult to machine materials. This is achieved through the benefit of a single heavy slant bed casting with high precision hand scraped square guideways.
The fixed main spindle is 15kW and the 2-axis secondary spindle is powered by a 7.5kW drive with 150mm stroke in X3, and 450mm stroke in Z3. Both spindle arrangements have a 51mm capacity and deliver up to 5,000rpm.
The ability to carry multiple tools in both highly rigid and hydraulically clamped, large curvic coupling 12-station all-driven turrets enable simultaneous service to either or both spindles which considerably increases operational flexibility. Overlapped tooling applications further reduce non-cutting time which means both 12-station turrets have ample torque to position and maximise milling performance. For instance, the 2.2kW drives have 6,000rpm available while developing up to 25Nm of torque.
The configuration of turret axes enables the upper turret HD1 to provide X1, Z1 and Y1 travels of 190mm, 380mm and ±40mm while the lower turret HD2, has X2 travels of 190mm and Z2 of 175mm.
CITIZEN www.citizenmachinery.co.uk
