Makino's New T4
Designed for Titanium Machining
Makino's
new T4 five-axis horizontal machining center is built to increase titanium
milling efficiency, combining lean manufacturing methods and increased metal
removal rates for today's aerospace applications. It is specifically designed
for the production of large titanium and titanium alloy aerospace parts such as
edge frames, pylons and bulkheads. "The T4 includes several key elements for
efficient titanium machining, including an Active Dampening System, rigid
construction for enhanced performance, a high torque, high powered spindle, and
a high pressure, high flow coolant system for increased speed and productivity,"
said a company spokesperson.
"We
designed a machine that would be ideal for titanium, top-to-bottom," said Alan
Hollatz of Makino's Aerospace Group. "The unique characteristics of this
material demanded that we start with a rigid, stable platform to overcome
vibration problems associated with titanium milling, and focus on a horizontal
spindle solution with a compact high-torque integral drive spindle for faster
acc/dec and machining productivity."
Parts made
from titanium are critical to the aerospace industry for their high strength and
toughness, lightweight, corrosion resistance and ability to withstand extreme
temperatures. Titanium parts are difficult to cut due to deflection issues and
poor thermal conductivity that concentrates heat at the cutting edge.
The T4
design features Makino's new Active Dampening System, a technology that balances
frictional forces with the cutting force to suppress vibrations. A company
spokesperson stated, "With the Active Dampening System enabled, the T4 can
perform deeper cuts, achieve higher metal removal rates, and reduce tool wear."
The T4 is
built with a rigid structure to reduce cutting vibration associated with
titanium. The machine provides X, Y and Z-axis travels of 165 in, 78 in, and 39
in (4,200 mm, 2,000 mm, and 1,000 mm) respectively, and can hold workpieces up
to 11,022 lbs (5,000 kg) for a large stable cutting area. The machine weighs a
total of 240,000 lbs (110,000 kg), providing increased rigidity.
"The
machine's HSK-A125 spindle is Makino's most powerful spindle to date, providing
higher torque, horse power, and clamping force than all predecessors," said the
spokesperson. "Its compact design combines the latest induction motor technology
with twin inverter drive technology for higher torque (740 ft-lbs, 133 HP
continuous; 1,100 ft-lbs, 200 HP peak). The spindle is supported by roller
bearings to ensure high rigidity, which keeps the energy loss to one-half that
of conventional gear-driven spindles." The spindle delivers a maximum cutting
force of 20,000N and has a maximum speed of 4,000 RPM. The A and C-axes increase
part accessibility with a 110 degree A-axis rotation and a 360 degree
continuous C-axis rotation.
The T4's
high pressure, high flow coolant system delivers 53 gal/min (200 L/min) of
water-soluble coolant at high pressure (7MPa) to the cutting zone for increased
chip evacuation from multi-flute tools. The standard coolant system includes
overhead shower, spindle nozzle, and through-spindle coolant for direct chip
removal from the cutting zone. At high volumes and pressure, the T4's coolant
system provides the sustainable, long-term, dynamic accuracy necessary for large
titanium parts, according to the company.
The T4 can
be equipped with an automatic pallet changer system for continuous operations,
eliminating costly downtime for part changeovers. A standard 60-tool capacity
automatic tool changer (optional 120 and 180-tool capacities are available) is
equipped for unattended machining capabilities.
The T4 can
also be integrated with an automatic pallet transfer and storage system in a
flexible Makino Machining Complex (MMC) for extended periods of unattended
operation. This automation system assigns work and initiates operations
automatically, maximizing spindle utilization for increased productivity.
For more
information contact:
Mark
Rentschler
Makino Inc.
7680
Innovation Way
Mason, OH
45040
800-552-3288
Fax:
513-573-7360
www.makino.com
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