Fives Group has introduced a new integrated contouring head for its Cincinnati six axis Mega 800 HMC.
The contouring head is part of a sale ofa two-machine cell that includes the first use of the head on this machine size. Purchased by a European machine tool manufacturer, the new cell will replace an existing two-machine cell in 24-hour operation, taking on 30 to 50 per cent more work, including work currently processed on boring mills. The machines’ servo-controlled, U-axis cross-feed spindle can produce circular features up to 540-mm diameter that require turning, boring, co-boring, facing, threading, tapered boring, and helical thread milling.
The new Mega cell eliminates the need to produce these features on other machines, dramatically reducing workpiece transfers, setups and work-in-process inventory, while improving accuracy and manufacturing velocity.
The cell includes a 14-pallet work queue, two vacuum-equipped load/unload stations, storage for 640 tools and floor-mounted mist collection for each machine. Each machine stores 120 tools, while an integrated storage/retrieval system holds an additional 400, which are transferred to the machines via overhead robot.
“The combination of the U axis head and main W axis milling/boring spindle eliminates the need for boring machines and turning centers by combining both capabilities in a single multi-tasking machine,” says Fives Cincinnati product manager Ken Wichman. “The U axis head produces 2,475 Nm torque (S6-60) and has a Sandvik Coromant Capto C8 tool interface, capable of carrying a tool weight of 30 kg (66 lb). The range, power, accuracy and tool-handling capability of this contouring head give the customer a much wider range of processing capabilities than possible with contouring attachments or other options. The integrated head is much more rigid than attachments bolted on or held by the spindle taper, resulting in superior part quality, surface finish and dimensional accuracy. The standard tool interface eliminates the need for special tools, and the integrated head eliminates manual head changing and storage. This extends the successful integration of this head from the larger Giddings & Lewis HMC 1250 platform.”
Both Mega HMCs in this first sale are equipped with a 4,000 rpm, 45 kW (S6-60 hp) W axis live spindle with 130 mm bar diameter and 800 mm travel. The machine accepts parts weighing up to 2,200 kg (4,840 lb), 2,000 mm (79 in.) tall and 1,300 mm (51.2 in.) in diameter. The three-point-leveled, T-design base moves the workpiece in a straight line to and from the spindle for precision boring, with X, Y and Z axes all driven by dual ballscrews using absolute scale feedback. The B axis rotary table with absolute encoder allows infinite contouring, producing 5,100 Nm (3,300 ft lb) torque.
The machines utilize the Siemens 840D Solution Line CNC with Windows 7 OS and operator interface, and the cell complies with all European and US safety/health standards.