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Citizen Machinery has released the fourth generation of its M-Series Citizen CNC sliding-head turn-mill centre, which it claims is not only faster, but also features increased levels of versatility from additional axes and tool positions.

Its Cincom control incorporates higher-speed arithmetic processing and software developments. Combined with its versatility, this results in the ability to include complex component features and overlapped cutting cycles in its single operational capability.

According to the company, when the new 12-axis machine is compared against the third generation, gains to the order of 30 per cent can be made when machining the same component using identical settings and tooling as a result of reductions in non-cutting times.

A wide variety of secondary machining operations can be carried out from the upgraded three-axis, 10-station turret, which has intermediate station positioning with Y2-axis cross feed control. This aids setting and tool adjustment while maximising the choice to use up to 60 tool positions. 

The turret can now be indexed without returning to the back position which shortens further the tool change time by 0.5 seconds per index. Each turret position is able to accommodate multiple tool holders, either driven at fixed giving even greater flexibility and adding to the versatility of application. 

Key product features and benefits

  • The M-Series is launched in a 16mm-capacity M16-Type Vlll version.
  • The ability to include complex component features and overlapped cutting cycles in a single operational capability increases the competitive advantage of reductions in the cost per part produced.
  • Can carry out a wide variety of secondary machining operations.
  • Up to 26 driven tools can now be applied to a component machining sequence.
  • 30 per cent faster than third-generation version.
  • Choice to use up to 60 tool positions.
  • Tools are driven by 1.5kW, 8,000rev/min motor with a maximum drilling capability of 10mm to the main spindle and 8mm to the sub spindle.
  • In order to optimise cutting speeds to accommodate a wide range of material types and sizes up to 16mm diameter, the main spindle is now powered by a 3.7kW drive and the sub spindle by 1.5kW motor.
  • Up to 200mm can be machined in a single stroke and as part of the development to influence reduction in cycle times, rapid traverse rates are now 32m/min.
  • Each turret position is able to accommodate multiple tool holders.

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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