IMTS 2002 Demonstration
collaboration with IBAG, Compumachine now offers a new spindle
option for its Vibra-Free Ultra-High-Speed-Hard-Milling center.
The new spindle runs at 42,000 RPM with HSK E40 tooling, its
continuous power achieves 14HP (18HP S6) with higher toque in
lower speed range. The newly developed spindle features a groundbreaking
design on its lubrication system. Through EDM drilled holes on
the spindle-bearing race, a thin film of oil-air mist is injected
directly on the ceramic balls. Consequently, the thermal fluctuations
are better controlled and the use of larger size bearings is
made possible while maintaining the top RPM.
Vibra-Free also reduces the need for typical high speed spindle related
warm up procedures by taking advantage of IBAG's built-in spindle shaft
monitoring option. With this feature, sensors ahead of the front spindle
bearings detect position changes of the spindle nose - and thus of the
tool holder. Using the signals generated by the detector, CNC calculates
the offset for the Z-axis. Vibra-Free can then compensate the axial elongation
cause by the thermal effects & high-speed centrifugal force in real time.
Therefore, high thermal accuracies are easily maintainable in continuous
operation regardless how long & what RPM the spindle is running.
enhancement comes on the tooling side, Compumachine will offer
an optional shrink fit package with this version Vibra-Free.
Shrink fit tooling is so far proven to be the best choice for
the High-Speed-Marching process. Shrink fit tooling is light,
rigid, well balanced and with excellent run out which is a
perfect match for HSM process; it enables the use of long reach
end mill, improves the spindle/tool life and surface finish.
In addition to the new spindle option, Compumachine has had
numerous successful Vibra-Free installations since 1999. Along
the way, the popular Vibra-Free is able to improve almost every
aspects of its performance: power, rigidity, and accuracy.
The new Vibra-Free will be demonstrated at booth #D4184
during IMTS2002 show.