Puma 2600 SY II Y-Axis Horizontal Turning Center Built for Accuracy
Doosan Machine Tools welcomes the Puma 2600 SY II to its lineup of high productivity turning centers. The turning center is a high performance, 10-inch class, subspindle Y-axis horizontal turning center designed to craft high precision parts from a range of tough-to-machine materials. A study was conducted to improve upon every aspect of the previous model, and the result is a machine that’s well equipped to handle the toughest tasks, the company says.
The Puma 2600 SY II’s bed is designed for excellent rigidity and accuracy. A standard active thermal compensation system features six sensors that collect the temperature at each location and feeds into the machine control to compensate for structural changes caused by heat growth, decreasing the effects of thermal deformation by 60-70 percent compared with the previous model. NTN sliding bearings have been applied to all axis box guideways on the carriage, improving fine movement by more than 40 percent and wear resistance by more than 30 percent. The feed box and X-axis bearing mount have been reinforced for high rigidity.
“Shops that routinely handle complex jobs are going to want to look at the Puma 2600 SY II,” says Jim Shiner, director of sales and marketing at Doosan Machine Tools America. “It was designed from the ground up to be supremely accurate and reliable without breaking the bank. Complex parts are machined in a single setup, which ultimately saves time and brings a healthier bottom line.”
The built-in spindle minimizes vibration and provides better acceleration and a smooth, fast ramp-up. It generates a maximum 22 kW (30 hp) and 599 Nm (442.1 foot-pounds) of torque. Improved spindle run out (6 microns) has been achieved by changing the structure of the spindle bearings from four angular ball bearings to two angular contact ball plus two taper roller bearings. In addition to improved accuracy, this design update delivers increased radial load capacity for heavy cutting performance.
The 12-station milling turret has also been redesigned for improved durability, increased clamping force and reduced tool runout. The 10-hp rotary tool drive motor features a maximum 70 foot-pounds of torque and can continuously maintain 25 foot-pounds of torque from 425 to 5,000 rpm. BMT tooling is said to provide excellent rigidity for heavy chip removal, fine surface finishes, long boring bar overhang ratios and extended tool life. Turret indexing time has been reduced as well: 1.2 seconds for a full turret index and 0.15 second for a single-station swivel.
The Doosan FANUC i series operation panel has an updated Easy Operation Package (EOP) with improved setup, operation and maintenance programing, the company says.
Introduced to the turn-mill machine tool design in about 1996, the Y axis was first used on a single-spindle, mill-turn lathe with a subspindle. The idea of a Y axis on a CNC originated from the quality limitation of polar interpolation and the difficulty in programming, not from electronic advances in controls or servomotor technology as one might commonly think.
Workholding for turning is usually fairly basic: The selection comes down to chucks or collets. This article looks at when to consider the collet chuck and what kind might be best for a given application.
CNC Swiss-Type machines have more capability built in than ever before. Many of these capabilites can be accessed using attachments that increase the throughput of the machine tool, improve the quality of the work coming off the machine and reduce or eliminate the need for secondary operations even for very complex workpieces.