August 2010 eNews
Super Large, Heavy-Duty Rotary Table Series
Lyndex-Nikken has added a super large, heavy-duty
Rotary Table Series to its high performance rotary
table repertoire. Five models are available, ranging
from the large CNC802 with 800mm (31.50") faceplate
capacity to the gigantic CNC2000 with 2000 mm
(78.74") faceplate capacity. The tables are built
for rigidity. Featuring heavy-duty construction,
these rotary tables integrate the finest casting
material with a unique patented ground carbide worm
screw mechanism. This results in a balanced
environment for unprecedented rigid machining. A
large dual face contact bearing support dampens
aggressive machining vibrations and evenly
distributes extreme loads, thus allowing the rotary
tables to sustain weight loads equivalent to 22
motor vehicles (66,139 lb capacity). With RPMs
ranging from 2.7 to 5.5, an indexing accuracy of 15
arc seconds, and set up and fixturing times reduced
by 90 percent, these Super Large Rotary Tables are
ideal for all high-precision, high-production
aerospace, construction equipment, and energy
applications. Numerous rotary table sizes give
multiple options to help further boost the output
performance of any boring mill or gantry machining
center.
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Lyndex-Nikken Inc
More Sliding Head Users to Benefit from New QS
System
Sandvik Coromant’s innovative QS™ holding system,
already available for users of Citizen and Star
automatic sliding head lathes, is now being
introduced for machine shops with Tornos, Tsugami
and Nexturn sliding head models. Released as part of
CoroPak 10.1 phase of product introductions, the QS
(Quick Start) system is a productive alternative to
conventional tool holders. With the QS system, tools
can be slid in and out quickly, automatically
locking into place on centerline, thus improving
repeatability and accuracy thanks to its highly
secure positioning in the tool post. It consists of
a system of stops, wedges and short toolholders that
replace conventional tool post hardware. The result
is reduced downtime through faster tool changes. The
following new QS components are available: QS wedges
for Nexturn SA20 and SA26 machines; QS wedges and
stops for Tsugami B0, BS, BU, BM, BN, BA and BW
models; and QS wedges and stops for Tornos Delta 12
and 20 machines. Toolholders are available to suit
CoroTurn 107, CoroCut 1, -2, -3, CoroCut XS and
CoroThread 266.
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Sandvik Coromant
High Speed Machining Centers Offer Absolute Z
Reference In Micron Range
GF AgieCharmilles' LP Precision series of high speed machining centers raises the bar for metalworking precision.
GF AgieCharmilles has introduced a
new series of Mikron high speed machining centers
that raises the bar for metalworking precision. The
series currently includes the HSM 400 LP Precision,
HSM 400U LP Precision and HSM 500 LP Precision.
Produced in Switzerland, every machine in the LP
Precision series must prove its unconditional
stability in demanding work conditions before being
shipped. Experienced experts use handpicked machine
components to build each machine in the line.
GF AgieCharmilles is the only European machine
manufacturer to offer a solution for
process-reliable tool measurement on the machine
tool. The company’s Intelligent Tool Measurement
(ITM) provides optical tool measurement at full
spindle speed, enabling high levels of precision. ITM records the tool
tip with image sensors and uses
specialized software to clean up the image,
resulting in the first ever ability to obtain a tool
measurement with an absolute Z-reference in the
micron range. This breakthrough allows for the
development of new and more efficient operating
strategies.
Machines in the LP Precision series possess
excellent thermal control characteristics, with
systems cooling the drive groups in a targeted
manner. Each of the linear axes, as well as the
rotation/tilt unit, has its own cooling circuit. The
Opticool concept, which also includes cooling of the
spindle nose, allows for a previously unobtainable
level of temperature stability. The quick dispersion
of heat results in a geometric stability that
provides extremely high repeat accuracy in axial
movement.
An example of the performance provided by the LP
Precision series consists of an application in CrVMo
steel with a hardness of HRc 60. When removing the
average amount of material in a finishing process
with a residual oversize of less than 10 mm, the
whole workpiece surface could be machined to an
average roughness of 0.02 Ra and 20 μm.
GF AgieCharmilles.
Turning Center Offers Raw Power…Polished
Performance For Large Jobs
With a generous 10.8” through-hole diameter, plus
60 Hp of turning power…3,293 ft-lbs spindle
torque…up to 6,102 lbs Z-axis thrust…and optional
self-centering chucks that can be front and rear
mounted, Doosan’s new Puma 480D is designed
specifically for oil-field applications. But it has
all the power, speed and precision to produce any
parts within its 25.6” diam. x 39” long (80.4”
optional) work envelope.
Widely spaced, wrap-around guideways assure
speed, stability, and accuracy. Each is induction
hardened, precision ground, and bonded with a
low-friction fluroplastic coating to reduce wear,
dampen vibration, and enhance surface finish. A
final hand scraping provides the ideal surface for
lubricant flow.
Massive Meehanite beds further dampen vibration
and help dissipate heat. The 45° slant bed allows
convenient access to tools, chucks, and work pieces,
while enabling easier, more thorough chip removal.
Torque tube design eliminates bending and twisting,
and provides a through-the-bed conduit for cooler,
consistent operating temperatures.
A 5.9” thick turret head that’s mounted on the
same ground surface as the tailstock maintains
perfect alignment and center height. The heavy duty,
cartridge-type spindle is supported by a double row
of cylindrical roller bearings on either side of
duplex angular thrust bearings. Cylindrical roller
bearings with a large contact surface provide the
high rigidity needed for heavy cuts with high
precision. Power is supplied by a two-speed gearbox,
generating spindle speeds up to 1,000 rpm and
powerful low-end torque. The gearbox and motor are
positioned away from the spindle, eliminating the
transfer of heat and vibration.
Double pre-tensioned ball screws, supported on
both ends by precision class P4 angular contact
thrust bearings, are located on the X and Z axes.
Both interface with large diameter ball screws
selected for high accuracy, feed thrust, and rapid
traverses. The ball screws are protected by torque
limiter clutches to minimize damage in the event of
a crash.
The 12-station turret employs a large 12.6”
diameter Curvic coupling, and exerts 23,606 lbs. of
hydraulic clamp force. Indexing repeatability is
+/-0.00008” on the X axis and +/-0.00012” on the Z.
A high-torque index motor controls turret rotation,
deceleration and clamp. Turret indexing is non-stop
bi-directional, with a 0.25 sec. next-station
indexing time. A rotary encoder determines the
turret position, and a proximity switch confirms
clamp.
Standard features on the Puma 480D include a
programmable tail stock; waylube separation system;
high pressure coolant system; automatic forced
lubrication to all guideways, ball screws, and
tailstock quill; and a tool monitoring system. The
controller is the Fanuc 0iTD.
The Puma 480D will be demonstrated at IMTS 2010,
South Hall, Booth 8100.
Doosan Infacore
Heavy-duty HMC Adds New Tilt-spindle for 5-axis
Productivity on Aerospace and Energy Parts
MAG's modular HMC 1250/1600 Series
will be exhibited at IMTS with a new
180,000-position A-axis tilt-spindle for 5-axis
horizontal machining on large aerospace and energy
parts. The HMS1250/1600 Series now includes six
spindle options to suit special-purpose or general
machining requirements. The new 6000 rpm/46-kW
(61.6-hp) tilt-spindle joins an all-around 10,000
rpm/ 56-kW (75-hp) spindle, high-speed 24,000 rpm
spindle, high-torque 2600 Nm/80-kW (1918 ft lb)
spindle and two live spindles (110 or 130 mm
diameter). The high-torque spindle (also exhibited
at IMTS) is especially suited for aerospace titanium
cutting, while the live spindles extend W-axis reach
by up to 800 mm (31.5 in), enabling deep cavity
milling to high precision with shorter, more rigid
tool lengths. Standard on the live spindle, MAG's
exclusive Z-axis thermal compensation software
dynamically offsets spindle growth to maintain tight
tolerances.
The HMC 1250 Series is engineered for
high-precision, high-productivity machining of large
aerospace, power generation, pump, valve, and
off-road equipment parts. Designed for extreme
application flexibility, the machine offers maximum
3000 mm (118 in) work-zone swing, 2050 mm (81 in)
work-height capacity and 7000 kg (15,400 lb) pallet
load capacity. Major machine components, including
the X-bed, Z-bed and column, are cast ductile iron,
with 1250 x 1600 mm pallets, headstock and rotary
table housings of gray cast iron. Modular design
provides a range of machine travels, 60- to 120-tool
magazines and two control choices.
Powerful and agile, the new HMC offers 56 to 80
kW (75 to 107 hp) spindle power, 35 kN (7870 lb)
Z-axis thrust, and super-rigid, full-contouring
hydrostatic rotary table. The 360,000-position
contouring table provides a rigid work platform,
while a rugged worm gear drive with clamp securely
holds axis position. Rotary table positioning
accuracy is 10 arc seconds, repeatable to 5 arc
seconds. Positioning accuracy of the tilt-spindle is
4 arc seconds, repeatable to 2 arc seconds.
Meeting industry needs for tighter part
tolerances and greater machining accuracies, the HMC
Series comes standard with linear scale feedback in
X, Y and Z axes, providing 8 micron (0.0003 in)
positioning accuracy and 5 micron (0.0002 in)
repeatability. Heavy-duty hardened and ground roller
guide ways enable a rapid traverse rate of 40 m/min
(1575 ipm) with high acc/dec rates, double the load
capacity and nearly 10 times the wear life of
ball-type ways. The full work zone enclosure on the
machine is pre-engineered for mist collection and
includes a doorway for operator access with
walkway/platform inside.
MAG
Hardinge Introduces New VMCs
Hardinge Inc. announces the release of two
new Bridgeport 50-taper Vertical Machining Centers
to their growing machine tool product line. These
new machining centers, the Bridgeport GX 1300-50 and
the GX 1600-50 complement the 40-taper models which
were released previously.
The new machines are designed for heavy cutting
of the toughest materials. In addition to a rugged
50 taper spindle they are manufactured with a heavy
duty cast iron base for added stiffness, superior
damping characteristics and increased thermal
stability. The standard Fanuc spindle motor provides
47HP (35Kw). A 24 tool capacity, bi-directional
automatic tool changer is standard. In addition to
the many standard features, a host of options are
also available including 4th and 5th axis drive
packages, rotary tables, tool probe, part probe,
spindle oil chiller and many others.
Hardinge Inc.