The Starrag S1250 HD five-axis machining centre with hydrostatic guides, which is suitable for machiningtitanium thanks to its rigidity and damping attributes, achieved astonishing results in performancetestsperformed by Starrag at its main plant in Rorschacherberg. Using a carbide cylindrical endmill (40 mm diameter, 18 teeth), the machiningspecialist achieved a metal removal rate (MRR) of 1516 cm3/min. Starrag estimates this MRR is potentially a world record in titanium machining.
Even the prototype of the Starrag S1250 HD proved to be a highly efficient machine for cutting titanium structural components. Two years ago, in roughing tests, the machining centre with hydrostatic guides achieved up to three times the MRR of the Starrag STC 1250 version featuring roller bearings. The improved damping and dynamic performance also ensured high precision and surface quality during finishing.
For the series-produced machine, Starrag engineers imparted a few additional modifications to increaseMRR further and reduce tool wear. As the most critical factors in this context are rigidity and damping, Starrag made the machine and column structure even more sturdy.
Another revision concerned the rotary table, which is now designed as a gearbox version. With a high torque of 25,000Nm and a clamping torque of 32,000Nm, it fully meets the requirements of titanium machining. In addition, the compact swivel milling head was enlarged on one side, creating space for a 50% stronger Aaxis with 12,000Nm of torque and 20,000Nm of clamping torque while retaining accessibility.
In terms of the work spindle, a new feature is the HSK-B160 interface, which ensures high tool rigidity when cutting large depths.
Airbus has already ordered five Starrag S1250 HD machines for its Varel site in Germany.
More information www.starrag.com
