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Doosan Puma Turn-Mill Centers
PUMA MX TURNS AND MILLS IN A SINGLE SETUP
West Caldwell, NJ — The Puma MX series turn-mill adds true milling capabilities to a powerful Doosan Infracore turning center. The new design provides unmatched flexibility within a complete spectrum of part geometries. From simple turning or milling to complex, simultaneous, multi-axis machining, complex parts can be produced on one machine in a single setup. The dual spindle, multi-tasking Puma MX is built for heavy and interrupted cuts, long-term accuracy, and superior finishes.
The 12 station turning-tool turret is non-lifting to protect the coupling from chips and other contaminants, and indexes from station to station in a quick 0.2 seconds. Live or static tools can be mounted at any station, and oriented toward either the main or sub spindle. Live tools are powered by a 7.5 Hp (15 minute) motor with a maximum speed of 4,000 rpm. Polar coordinate, helical and cylindrical interpolations are standard.
Depending on the Puma MX model selected, the turning spindle is powered by either a 25Hp, 35Hp or 40HP motor and driven at speeds from 3,000 to 5,000 rpm. The motor is built into the headstock casting with the armature on the spindle O.D. This beltless design eliminates backlash, feedback error and vibration, resulting in lower maintenance with superior precision and finish.
A combined B-axis (tilting) and Y-axis milling spindle maximizes the number of geometries that can be machined without the need for custom rotary tool holders. The Puma MX can cut, drill or tap above or below the centerline, or mill flats and key-ways. It can machine angular features, and provide a solid platform for heavy duty machining. A highly rigid, three piece curvic coupling locks at 7.5 deg. increments, while the RGC provides extra rigidity in 0.001o increments. The milling spindle is powered by a heavy-duty 20Hp or 25Hp motor, and generates spindle speeds up to 10,000 rpm.
Standard on the Puma MX is a floating 40-tool ATC, and a fixed 80 station ATC optional. Tool-to-tool change time is 1.5 seconds.
The bed and wrap-around, rectangular guideways are of fine-grain Meehanite casting to absorb vibrations, and inhibit thermal distortion and twisting. Each guideway is induction hardened, precision ground, and, before hand scraping, coated with Rulon 142 fluroplastic resin to reduce friction and eliminate wear. Three linear guideways on the upper carriage Z-axis provide rigidity and alignment during the toughest cuts without lift or torsion that might otherwise compromise accuracy. Consistent with all Puma machine tools, the bed’s torque tube construction prevents twisting and distortion from heavy cuts, and provides a generous, machine-long conduit for fresh air.
Each axis is driven by a large diameter, double-nut Tsubaki ball screw, selected for its combination of accuracy, speed and feed thrust. An electric torque limiter protects the ball screws and minimizes damage in the event of a crash.
Among the standard features of the Puma MX is its automatic tool setter to measure tool offsets. The offsets are automatically computed and fed into the controller, eliminating the risk of data entry errors. Also included is the Doosan Infracore Tool Monitoring System, which monitors spindle and axis load – both overload and underload - while the axis is feeding. Loads exceeding the wear settings either initiate an alarm, or switch automatically to a redundant tool. Exceeding the tool-breakage-load stops the machine and alerts the operator.
Puma mill-turns are available with dual spindles as the Puma MX2000ST, MX2500ST, and the MX3000S for parts as large as 21.7:” diam. with maximum lengths from 40.2” to 60”. A single spindle model with programmable tailstock is available as the Puma MX2500. The controller is a Fanuc 18i-T.
DOOSAN INFRACORE TWIN-TURRET, TWIN-SPINDLE TURNING CENTER PUTS MORE TOOLS IN THE CUT SIMULTANEOUSLY
Summer 2007
West Caldwell, NJ — Doosan Infracore’s new PUMA TT1800SY high-performance turning center features upper and lower turrets, equal-capacity opposing spindles, and high-speed, wraparound rectangular guideways. With twice the tools in the cut, and twice the parts being cut simultaneously, productivity can be almost doubled. Y-axis motion and simultaneous feed control on the upper turret enables complex machining processes, such as circular and cylindrical interpolation, to be cut in a single setup.
With double-tool holders, the Puma TT 1800SY’s twin 12-station turrets can house a total of 48 BMT 55P tools, with live tooling at any station. Their quick-response servo drives reduce station-to-station times to 0.15 seconds. This quick indexing time, combined with a 1,575 ipm Z-axis rapid traverse, shave additional seconds from cycle times. Each axis is driven by a digital AC servo motor. These high torque drive motors link directly to the ball screws, eliminating intermediate gears, resulting in quick, responsive slide movement that’s free of backlash.
The left and right spindles are driven by a 30 Hp (25 Hp continuous) integral motor, at speeds up to 5,000 rpm. The motor is surrounded by an oil jacket cooling system to ensure consistency and precision through the widest range of cutting conditions.
The Puma TT can also be specified as a twin turret, with a programmable tailstock replacing the second spindle. The tailstock has a travel of 27.75” along wide, wraparound, rectangular-type guide ways. An additional 5.9” is available through quill travel.
Puma TT machines are constructed on heavily ribbed, Meehanite castings. Their 45o slant bed design allows easy access to the spindles and turrets, while torque tube construction provides a through-the-machine conduit for fresh air, while preventing twisting and deformation. The maximum turning diameters are 9.05” on both spindles. Maximum turning length is 9.1”. Bar capacity is 2.6” diam.
Standard features include a safety window on the front door, swiveling operator panel, and a belt-type oil skinner to eliminate tramp oil from the coolant. Also included are an absolute positioning coder, air blast for chuck jaw cleaning and the Doosan Infracore tool monitoring system. Control is with a Fanuc 18i-T.
HIGH PERFORMANCE DOOSAN INFRACORE TWIN-TURRET TURNING CENTER
Summer 2006
West Caldwell, NJ — The new Doosan Infracore PUMA TL-series turning centers from Doosan Infracore feature upper and lower turrets, and a programmable tailstock for high production machining. With two turrets cutting simultaneously, cycle times can be significantly reduced. Work capacity is 9.4” dia. x 23.6” long on the model TL2000, and 39.3” long on the TL2500. Bar capacities are 2-5/8” on the TL2000 and 3” on the TL2500L. Both models are designed for heavy and interrupted cutting, high accuracy, and superior surface finishes.
The two turrets house a total of 20 (12 upper + 8 lower) tools. Their quick-response servo drives reduce station-to-station times to 0.2 seconds. This quick indexing time, combined with a 945 ipm Z-axis rapid traverse, shave additional seconds from cycle times.
The spindle is driven by either a 30 Hp or 35 Hp integral motor, generating speeds of 5,000 rpm or 3,500 rpm respectively. An oil jacket cooling system surrounds the motor to ensure consistency and precision through the widest range of cutting conditions.
The tailstock features MT#4 center with spindle bearings built into the 3.94” diameter quill. The heavy-duty tailstock travels along wide, wraparound, rectangular-type guide ways and has a generous 4.7” quill stroke. The body can be positioned by programming body unclamp and drive pin engagement with the upper turret.
Both models are constructed on heavily ribbed, Meehanite castings to help dissipate heat and absorb vibrations. Their 45° slant bed design, a characteristic of Puma turning centers, allows easy access to the spindle and turrets, and improves the flow of chips and coolant. Torque tube construction, another Puma characteristic, eliminates torsional stresses associated with heavy cuts, and provides a through-the-casting conduit for cool air.
Standard features include an automatic tool setter to compute tool offsets without skim cuts, and a tool monitoring system. A belt-type oil skinner to remove tramp oil from the coolant, and electric torque limiter crash protection are also standard.
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