Maximum setting flexibility through the incorporation of up to 16 tool positions on the eight station, tool turret servicing front and rear spindles accommodating bar up to 42mm diameter, illustrates the level of versatility built into the totally new Miyano BNA-42S fixed head turning centre, the company reports. The machine is to be launched at MACH 2010 and demonstrated on the Citizen Machinery UK stand. It has been specifically developed for single cycle turn/milling tasks by combining front and back machining and supercedes the successful BNC and BND machine series of which more than 300 have been installed in the UK. The BNA-42S is compact, rigid and maintains the tradition of high accuracy turning centres from Miyano, requiring just 2.1m by 1.3m of floor space. It is the first machine from the company stable to be influenced by Citizen with the new generation of programming interfaces and cycle time saving overlapping the functional capabilities of the Fanuc control. Power to the main spindle is 7.5kW giving 5,000rpm and 5.5kW, 5,000rpm for the sub-spindle. Each of the driven tool positions on the turret is powered by 2.8kW, 5,000rpm motors and because of the independent drive system there are no torque losses at the cutting tool enabling tool shank sizes up to 25mm to be accommodated. The strokes in X, Z and B (sub-spindle) axes are 135mm, 235mm and 310mm respectively. Significant in the turret design is the ability to half index which doubles the application interface for tools to 16 positions. However, Miyano engineers have also developed multiple tool holders to carry static and driven tools that can be attached to any turret position without fouling adjacent tools or creating a potential for collision. As part of the joint development between Citizen and Miyano, a focus on idle time reduction should show an immediate saving of some 27% in these elements compared with the previous generation of Miyano machines. The BNA series is a modular design and thus is available with or without sub-spindle, as a chucker or with a tailstock. There is also a smaller bar capacity version of 34mm (BNA-34S) which incorporates the same specification. Options include parts catcher and conveyor, a long part system with part catchment tray, a range of bar feeders, swarf extraction systems and high pressure coolant systems. Miyano
www.miyano.co.uk
Hall 5, Stand 5450
