Doosan PUMA400 Turning center

Doosan PUMA400 Turning center 

Massive yet responsive Turning Centers without compromise. The most powerful machines in their class.

The PUMA 400 series turning centers are without a doubt the most powerful machines in their class. High metal removal rates, along with rapid positioning and fast bi-directional turret indexing, guarantee unmatched cycle times when real cutting is essential.

PUMA 400C/MC/LC/LMC/XLC/XLMC

Main spindle power-torque diagram

The headstock casting is made of Meehanite and ribbed on the outside to increase the surface area for better heat dissipation. The headstock and main spindle are manufactured in a temperature-controlled environment, then assembled and tested in our clean room. Double row of cylindrical roller bearings and duplex angular contact bearings provide high rigidity and efficiency to transmit motor power to the spindle.

The high-torque spindle motor provides power for heavy stock removal, greatly reducing the number of roughing passes required. For 3-axis milling models, the motor is a spindle servo type controlling the spindle in 2-axis mode and full C-axis mode. Switching between the two modes is nearly instantaneous.

Power is delivered to the spindle through a two-speed gearbox allowing high spindle speeds as well as powerful low-end torque. The gearbox and spindle motor are isolated from the 45-degree spindle, eliminating vibration.

The large 12-station heavy-duty turret features a large Curvic coupling diameter. This heavy-duty design provides unsurpassed rigidity for heavy stock removal, fine surface finishes, and extended tool life. Indexing repeatability is ±0.0005 degrees. Turret indexing is non-stop bi-directional. An extremely reliable high-torque hydraulic motor provides for quick turret indexing. 32mm square tool holders are mounted directly to the turret. The boring bar capacity is 6" (152mm). The turret features a flexible design, allowing for left or right-handed, ID or OD tool placement.

The exceptionally stable turret has a wide turret plate to ensure long bearing bar overhang ratios. The thickness of the turret plate is 126mm. The large 12 and 10-station heavy-duty turret features a large diameter Curvic coupling and hydraulic clamp force. The heavy-duty design provides unsurpassed rigidity for heavy stock removal, fine surface finishes, long bearing bar overhang ratios, and extended tool life. Turret rotation, deceleration, and clamp are all controlled by a reliable high-torque hydraulic index motor. The clamp and rotation are virtually simultaneous. Turret indexing is non-stop bi-directional, with a 1.5-second next station index time. Turning tools are securely attached to the turret by wedge clamps.

The operator control panel is on a pendant for easy viewing and accessibility during set-up and operation. The layout and location of the panel are designed to be efficient and convenient for the operator. Comprehensive alarm diagnostics are provided for the machine, Preci-Flex adapter control, and programming errors.

Preci-Flex ready rotary tool holders are available on the milling versions. Preci-Flex is a tooling system that utilizes the existing ER collet taper in the rotary holders. The spindle face is precision ground relative to the taper, and there are four drilled and tapped holders in this face. The Preci-Flex adapters locate on both the taper and the spindle face for maximum rigidity. A variety of Preci-Flex adapters are available for special applications.

Straight Milling Head

Base mounting tool holder BMT 75P
More rigid clamp by 4 screws
Higher accuracy by 4 keys guide
12 rotary tool stations

Angular Milling Head

The programmable toolstock body is mounted on the same guideway surface as the headstock. The heavy casting, large 12mm diameter quill, and precision Morse Taper live center provide outstanding rigidity. The 120mm quill stroke is activated by either the program or foot switch. Both the X and Z axes feature double pretensioned ball screws, supported on each end by precision class 7 angular contact thrust bearings. Both axes are driven by large diameter, high precision ball screws. Each ball screw has been carefully selected to achieve a combination of high accuracy, high rapid traverse rates, and high feed thrust. All screws are fully supported on both ends.

Spindle Power-Torque Diagram
The 37 kW spindle is directly coupled to a 2-speed electronic transmission, which provides maximum torque. The 2-speed gear with its precision ground gears provides quiet operation at high speed, then transfers its power to the spindle for vibration-free operation, resulting in excellent surface finishes. The PUMA 400A/B/C and MA/MB are available as optional specifications.

The PUMA 400 series has true 45-degree damping characteristics. This ensures high guideway rigidity with no deformation during heavy cutting. The bed is a one-piece casting with both the saddle and tailstock precision ground. A fluoroplastic resin, such as Kulon, is bonded to the mating way surfaces for its wear and friction characteristics and thermal distortion. The heavily ribbed torque guideways are wide wrap-around rectangular types for unsurpassed long-term rigidity and height. Optional long beds enable extra-long shaft machining.

Outstanding Rigidity for High Feedrates
Automatic lubrication is provided to all guideways, ball screws, and tailstock quill. The automatic tool setter reduces set-up time by minimizing the need for skim cuts, measurements, and entering tool offsets.

High-Pressure Flushing
The high-pressure flushing system removes chips from drilled holes, reduces the need for peck drill cycles, meets the requirements of most insert drill manufacturers, and significantly increases tool life.

Coolant System
The coolant is kept clean, and its life is extended with bed casting channels from the Z-axis to a separate reservoir. A belt oil skimmer separates waste oil from the coolant tank for easy removal. The system has a large 286L coolant tank and chip pan, which can be drained for easy cleaning.

PUMA 400/400L/400XL PUMA 400