Despite the poor global economic situation, Dörries Scharmann Technologie GmbH (DST) has won one of its biggest orders ever against international competition. Korean aircraft constructor KAI Korea Aerospace Industries Ltd., based in Sacheon City, has placed an order for seven Ecospeed F high-performance machining centers, including a rail-guided transport system, in a multimillion dollar deal with the machine-tool specialists from Mönchengladbach, Germany.
The centers will be used to machine the ribs that form the airfoil shape of the wing on the Airbus A350XWB. Ecospeed is the name of an exclusive DST concept that uses the Sprint Z3 parallel kinematic machining head. The technology is the most productive and efficient solution for machining aircraft aluminum structural parts on the market today, according to the company.
All of the machining centers are designed for workpiece sizes up to 2000 x 6000 mm. A C-axis is incorporated for positioning of the angular drilling/milling head. The machine can remove material at any dihedral angle between -130° and +130°. The drilling/milling head uses the tool interface as the main spindle and can be interchanged automatically. Thus, with five-sided machining, the Ecospeed F offers more complex options than a conventional milling machine, DST says, with an interference contour between tool shaft and machining head of only 50 mm.
The drive power at the high-performance spindle is 120 kW (100% dc), maximum torque is 83 N·m, and top speed is 30,000 rpm. Feed rates are higher than conventional machines, according to the company.
Each Ecospeed F has a rack type tool magazine with 125 positions. A vacuum workpiece clamping system, video monitoring, and Siemens' Sinumerik 840 D control system are part of the machining center.
DST will deliver the first unit to Korea in November; the seventh is scheduled for delivery in January 2014. On completion, a rail-guided transport system with three loading and unloading stations and 60 storage stations will link the seven machines.