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Precise Component Manufacture (PCM) has switched from producing components in separate setups on two-axis lathes and milling/machining centres to using one-hit, seven-axis mill-turn operations on two Miyano BNA-42 DHY fixed-head mill-turn centres supplied by Citizen Machinery.

The ability of the Miyano machines to employ up to 16 tools on each component in the same setup means PCM can meet the demand for complex components in sectors such as life sciences, inkjet printing, medical, semiconductor, analytic equipment and high-technology welding.

The high efficiency level of the Miyano machines is down to an independent two-axis secondary six-station sub-turret that holds three turning tools and three drilling tools. The turret combines with the available tool positions where a half-index mechanism enables two additional fixed tools to also be mounted at each of the eight positions — as a result, up to 16 tools can be applied to a component.

Key benefits of product application

  • The move to one-hit operations has enabled PCM to be more competitive in the production of complex multi-feature parts and to reduce its overall cycle and lead times.
  • Miyano machines require only one man to set up and operate; once the first machine is running, the operator can move across to another machine, rather than requiring dedicated operators for each one.
  • The machines consistently record cycle time savings of 20 per cent compared with a conventional, two-spindle, single-turret turning centre.

Citizen Machinery

Citizen is the world leader in CNC sliding head ‘one-hit’ turn-milling technology. It has a range of machines having a maximum bar capacity between 4 mm on the compact micro-machining capable Citizen R04 to 32 mm on the top of the range Citizen M32-VII which has the added capability of two Y-axis cross-feeds.   

The M32 can carry up to 80 tools, of which 20 can be driven, and can cut with three tools simultaneously giving low cycle times and high levels of productivity.  Also, fully automated unmanned cycles can be utilised through an integrated gantry option and conveyor system that helps ensure damage free parts during uninterrupted batch production.  A high pressure 2,000 psi CoolBlaster coolant system is a further option to optimise swarf control, tool life and machining difficult materials.

Following the acquisition in Japan in 2008 of 65 per cent shares in Miyano, the fixed head turning centre specialist, the two companies are maintaining their separate high profile brand names utilising a single sales operation.  However, turn-milling solutions from bar up to 64 mm diameter can now be provided.  In addition, with the Miyano range of turning and turn-milling machines for chucking operations, cell-type applications can now be accommodated with a wide range of automation options.   

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