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A new concept in turning/milling centres allows the machine to accomplish complex machining on difficult materials in half the time that convention turn/mills still require. At this year's IMTS 2010, INDEX Corp. introduced R200/300 turning/milling centres that include two powerful motorised milling spindles and two movable work spindles that permit them to machine equivalent workpieces almost twice as fast as commercially available turning/ milling centres that use only a motorised milling spindle. One motorised milling spindle and one work spindle are assigned to each other in two subsystems, one located above the other, permitting highly productive and flexible machining, including simultaneous and independent 5-axis machining of bar stock to 65mm on both spindles.
The axis arrangement produces directional kinematics, which enables "comprehensive and complete machining," according to the builder. Within the design the main spindle moves in Z, the subspindle in X and Z, milling spindle 1 (top) in X/Y/B, and milling spindle 2 (bottom) in Y/B. As a result the machine offers two independent subsystems, with exceptional stiffness and dynamic response. Workpieces can be machined efficiently and in parallel on the front and reverse sides. The R200 can accomplish full reverse side machining, as well as parallel machining. Both heavy-duty roughing operations and highly accurate fine-turning operations can be performed simultaneously on the main spindle and sub-spindle. To ensure a high degree of thermal stability and vibration dampening to enable machining of difficult-to-cut and highstrength materials, the R200 has a vertical cast machine bed with a heavily ribbed, enclosed modular design. Short chip-to-chip times Two separate shuttle units independently load the two motorised milling spindles with the HSK-A40 tools required in each case from a common chain tool magazine. With 80 or 120 places, the INDEX R200 has an extensive tool stock. Short chip-tochip times of approximately four seconds contribute significantly to minimising secondary processing times. While machining is performed on the main spindle, the lower milling spindle can load a new tool, protected from falling chips and coolant. The results in high productivity and improves process reliability. The two quill-guided motorised milling spindles are located in the centre of the machine bed. This diagonal arrangement allowed the usual cross-slide to be omitted. When combined with the playfree and wear-free hydrostatic circular guide, an overall system with exceptional stiffness is produced. The R200 exhibits high acceleration and rapid traverse rates due to the powerful drives and weight-optimised assemblies. Impressive key data, such as 11 kW power and 18,000 rpm, milling spindles as well as 0.9 s ramp-up time (0 to 5000 rpm) make possible the highperAir Jordan I 1 Shoes