6,2000 --- Compumachine demonstrates Ultra High Speed "Hard
Milling" machining center with fifth-axis at IMTS 2000
Illinois, September 6, 2000 --- Compumachine, Inc. exhibited
two of its new ultra high-speed "hard-milling" machines
in Booth #5130 of McCormick Place during the recent International
Manufacturing Technology Show. One of the machines was equipped
with a new fifth-axis table for added versatility, and was demonstrated
machining deep pockets in a plastics blow mold.
Designed specifically for North American tool, die, and mold makers,
the new Vibra-Free Ultra-High-Speed Hard Milling Machining Center (UHSHM),
is a bridge-type vertical and is the result of a collaboration with one
of Japan's leading designers of ultra high-speed machines, FMC.
The machine is manufactured at Compumachine's subsidiary, CKM, in Sanjo
City, Niigata, Japan, where the company currently builds its COMPUMILL
HMC-410 horizontal machining center.
The heart of the machine is a custom Swiss-built, high-frequency 12-hp
spindle capable of more than 40,000 rpm. The spindle is supported by
an extremely rigid and thermally stable cast bridge that virtually eliminates
flexing and distortion. The 27.56" x 17.72" table supports
up to 800 lbs, and traverses the 23.62" x 16.5" workplane at
speeds to 1,180 ipm, accelerating at 1G. Filling out the workcube is
a deep-throated 15.75" Z-axis travel.
cast iron machine bed is FEM analyzed and designed with massive
ribbing to absorb vibration, eliminate deflection, and virtually
shed any heat. The table rides on premium linear guideways,
automatically lubricated with unique K-seal wipers, and driven
by over-sized hardened, ground, and polished ballscrews, delivering
full-stroke positioning within 0.0001", as well as +/-
The SKI-25 tooling is stored in an easily reached 18-tool, random access,
bi-directional carrousel-type magazine, contained completely within the
full-machine guarding as well as totally shielded from the work.
All axis drives are Fanuc AC units with absolute position encoders to
eliminate maintenance-prone limit and proximity switches, while permitting
start-up anywhere within a part program. Machine control is via the most
advanced Fanuc 16i CNC, incorporating advanced NURBS software and high-speed
algorithms, to dramatically increase spindle and tool life, maximized
accuracy, and provide outstanding mirror surfaces.
The new Vibra-Free has proven equally adept cutting graphite or tool
steel, and in operation, has cut dies and molds in the hardest materials
in the same time or less than it would nominally take to machine graphite
Compumachine, Inc., is a major Northeast machine tool distributor. Through
its plant in Japan, it is also a manufacturer and importer of horizontal
machining centers and ultra-high-speed machining centers for hard milling
and graphite machining.