The new Lynx 220LYS/220LSY Series with Y-axis
Doosan's Lynx 220LSY Series is a range of affordable, compact and high-speed multitasking turning centers featuring a Y-axis, a feature that means milling and drilling capabilities of the Y-axis do away with the need for secondary machining operations that might otherwise be performed on another machine. "The result is consistent part quality, predictable throughput and no operator intervention. Non-lifting turret and roller Type LM guideways provide high-speed performance and superior accuracy. EZ Guide i conversational programming makes the series quick and easy to set-up," said a company spokesperson.
Base and Guideways
The bed is a single piece Meehanite casting with heavy ribbing to prevent deformation and twisting. "The guideways are on a 30° angle to maintain a minimal and constant distance from tool tip to guideway, thus providing rigidity and no deformation under heavy loads. The slant angle also provides good chip flow as chips and coolant slide downward into the chip pan," said the spokesperson.
The linear guideways are roller type for extra load capacity and rigidity. High precision linear motion guideways are used on all axes to allow high rapid traverse rates. The X-axis rapid traverse rate is 1,181 IPM and the Z-axis rapid traverse rate is 1,417 IPM. The LMG has a four-block of each axis and circular-arc contact design. The guideway rails are heavy-duty with a width of 1.2" in X-axis and 1.4" in Z-axis. The guideways are widely spaced for stability; they are fully protected by heavy gauge steel covers.
Specifications of the Lynx 220LYS Series
- Swing over bed: 23.6"
- Swing over carriage: 15.7"
- Maximum turning diameter: 11.8"
- Maximum turning length: 20.0"
- X-axis travel: 8.07"
- Z-axis travel: 22"
- Bar capacity: 2" (Lynx 22LYA), 2.628" (Lynx 22LYC)
- Chuck size: 6.5" (Lynx 22LYA), 8" (Lynx 22LYC)
- AC motor spindle: 20 HP
- Number of turret stations: 12
- Number of index positions: 24
- Toolholder type: BMT 45
- Boring bar diameter: 1.25"
Y Axis
The Y-axis increases the number of workpieces that can be machined complete without using expensive custom rotary toolholders. The Y-axis enables the milling cutter to machine above or below centerline. A few of the operations possible with Y-axis are drilling and tapping of off-center cross holes, milling of flats, and rough and finishing of key-ways. Y-axis travel is 4.13" (+/-2.065") and rapid traverse is 394 IPM.
Spindle, Servo Turret, Ball Screws and Drives
"To maintain perfect alignment and center height regardless of the bed temperature, the robust headstock casting is mounted on the same plane as the tailstock. The headstock is ribbed on the outside of the casting to increase the surface area for heat dissipation. The heavy-duty spindle is supported by a double row of angular ball bearings and cylindrical roller bearings in the front, and a double row of cylindrical roller bearings in the rear. Cylindrical roller bearings have a large contact surface that provides rigidity for high surface finishes. All spindle bearings are precision class P4 (AFBMA-B7) and are permanently grease-lubricated," said the spokesperson.
A high torque servo motor rotates the turret at high speeds and is a non-stop bi-directional, with a fast 0.11 second next station index time. Turret indexing is possible during rapid traverse movement away from the workpiece. The non-lifting design eliminates the possibility of chips reaching the coupling.
The X-axis ball screw is pretensioned for accurate positioning and thermal stability. The thrust bearings are precision class P4 (AFBMA-B7) angular contact type. Ball screws are centered between the guideways and are directly mounted to the A.C. servo motors without intermediate gears or belts to minimize backlash. Each axis has an electric torque limiter to protect the ball screw and minimize damage in case of a crash.
Sub-Spindle
The sub-spindle enables the complete machining of parts in one set-up. The full C-axis design allows milling, drilling and tapping on the back sides of parts. The sub-spindle body is accurately positioned by a ball screw and servo motor. The spindle is supported by angular contact bearings in the front and cylindrical roller bearings in the rear. The sub-spindles can be synchronized with the main spindle at speeds up to 4,500 RPM for "on the fly" part transfer. Parts can be automatically ejected into the standard parts catcher.
Control Operation
EZ Guide I is standard on all Doosan Lynx Series turning centers and enables users to program and run the machine on the shop floor using a conversational programming system. "Conversational" simply means that the user begins a machine process in a friendly dialog box by pushing a selection button. EZ Guide I requests only needed information pertaining to that process in the form of easy-to-understand prompts. The interactive process guides the user through each process needed to machine the part.
Further, the operator's console is mounted on the right side and can swivel for easy viewing. To minimize set-up time, manual controls are provided for turret indexing, spindle and feed functions. All push buttons on the operator's panel are sealed from coolant or dirt. Knobs for adjusting chuck and tailstock pressure are located on the front of the machine.
For more information contact:
Dave Barber
General Manager of Marketing
Doosan Infracore Machine Tools
19A Chapin Road
Pine Brook, NJ 07058
973-618-2500
dbarber@doosan.com
www.doosanmachinetoolsusa.com
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Jack Butts
AmTTech
10010 Houston Oaks Drive
Houston, TX 77064
832-912-2000
sales@amttech.net
www.amttech.net
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AmTTech
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Arlington, TX 76015
832-912-2000
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www.amttech.net
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Jack DeLaughter
Machine Tool Specialties, Inc.
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Machinery Solutions, Inc.
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Technical Machinery
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Mark Gehl
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Technical Equipment Sales Co.
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Technical Equipment
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Hales Machine Tools, Inc.
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Protek CNC Sales Corp.
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Rick Samuelson
Foothills Machinery Sales
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Broomfield, CO 80020
303-466-3777
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www.foothillsmachinery.com
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Dick Short
Adams Machinery
215 S. Rockford Dr. #101
Tempe, AZ 85281
480-968-3711
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www.adamsmachineryaz.com