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Super precision high-speed gantry-loaded Miyano GN-3200W fixed-head turning cell

A super precision, high speed gantry-loaded, twin-spindle turning cell with a turning capacity of 40 mm that requires a very compact floor area of just 1.4 m by 1.48 m has been added to the portfolio of fixed-head machine configurations available through Citizen Machinery UK of Bushey, Watford.

Further extending the flexibility of the fixed-head Miyano machines for automated production of single part types or family ranges of components such as required in high precision bearing or fuel injection production, the Miyano GN-3200W has a programmable double-gripper gantry integrated loading system to form a self-contained turning cell. With this arrangement, production can be set for maximum productivity by duplicating the same cycle at each independent spindle or perform first and second successive operational cycles to machine both ends of a completed part.

Each 2.2 kW, 8,000 revs/min spindle is serviced from its own two-axis platen-based tooling platform each able to accommodate up to five tools. Due to its non-turret indexing requirement, this platen arrangement is able to carry additional functions such as ganged or combination tools and high speed driven tools that can be supplied as an option.

Two entry doors at either end of the machining zone provide easy access from the front of the machine where palleted pre- and post-machined components are held and such is the configuration of the double gripper component handling unit that loading time, which typically takes just six seconds, can be effectively overlapped within the production cycle.

The compact design of the Miyano GN-3200W turning cell has focused on ensuring thermal stability and providing long-term production consistency. Its construction helps to eliminate any influence of vibration that could degrade the achievement of a fine surface finish and especially when used for hard turning applications. Tool life, especially on difficult to machine materials, will also benefit from the inbuilt rigidity and help to maintain cost-effective consistent production cycles when processing high tolerance precision parts.

Both spindles are able to accommodate diaphragm chucks or pull-back collet chucks. Control of the machine and loading system is via a fully integrated Fanuc unit and all service items for the machine and automation are easy to access.