Doosan Introduces Compact Multi-Tasking Turning Centers With Y-axis

The Y-axis increases the number of work pieces that can be machined complete without using custom rotary tool holders.

Doosan’s Lynx 220LSY Series is a range of compact and high-speed multi-tasking turning centers featuring a Y-axis for milling and drilling without needing secondary machining operations to be performed on a milling machine. The result is consistent part quality, predictable throughput, and no operator intervention. Non-lifting turret and roller Type LM Guide ways provide high-speed performance and superior accuracy. EZ Guide i, conversational programing makes the series quick and easy to set-up.

The bed is a single piece Meehanite casting with a heavy ribbing to prevent deformation and twisting. The guide ways are on a 30° angle to maintain a minimal and constant distance from tool tip to guide way, thus ensuring maximum rigidity and virtually no deformation under heavy loads. The slant angle also provides good chip flow as chips and coolant slide downward into the chip pan.

The linear guide ways are roller type for extra load capacity and rigidity. Quality high precision linear motion guide ways are used on all axes to allow high rapid traverse rates. The X-axis rapid traverse rate is 1,181ipm and the Z-axis rapid traverse rate is 1,417ipm.

The LMG has a four-block of each axis and circular-arc contact design. The guide way rails are heavy-duty with a width of 1.2" in X-axis and 1.4" in Z-axis. The guide ways are widely spaced to ensure stability, and they are fully protected by heavy gauge steel covers.

• Swing over bed: 23.6"
• Swing over carriage: 15.7"
• Max. turning diameter: 11.8"
• Max. turning length: 20.0."
• X-axis travel: 8.07"
• Z-axis travel: 22"

The Y-axis increases the number of work pieces that can be machined complete without using expensive custom rotary tool holders and 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: 4.13" (±2.065")
• Rapid traverse: 394ipm

The sub spindle enables the complete machining of parts in one setup. 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 and 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 4,500rpm for on-the-fly part transfer. Parts can be automatically ejected into the standard parts catcher.