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YMT’s TTL-20 high-speed 6" and 8" CNC turning center features a 30-degree true slant bed for increased stability and a lower center of gravity for more efficient chip disposal. The compact turning center is constructed with a one-piece heavily ribbed Meehanite casting and heavy headstock to withstand high-production cutting. Its roller guideways, combined with the 20-hp spindle motor, are said to offer higher cutting capacity and chip removal rates than linear ball guideways.
The high-speed, 10-station servo-driven turret is supported by a reinforced saddle and provides an indexing time of 0.2 sec. The turret can accommodate 1" toolholders and 1.5" boring bar holders. The series also offers 12-station live tools. The axial motors are direct-coupled, and all hardened and ground ballscrews are pre-tensioned to resist thermal deformation and provide higher-accuracy turning. A heavy-duty hydraulic tailstock offers a 2.75" programmable quill diameter. It also is equipped with an “easy position” feature that attaches the tailstock to the turret rather than positioning it by hand.
The turning center also is equipped with a chip conveyor, barfeeder interface, heat exchanger for the electrical cabinet, an automatic power-off function and an automatic lubrication system.
Editor PickRobotic Cell Cuts Cycle Time, Improves Part Quality
Sew-Eurodrive Inc. worked with Okuma America’s authorized systems dealer, Gosiger Automation, to design an automated cell that includes an automatic, magazine bar feeder that loads 6-ft. lengths of barstock into the machine. The shop also switched to an Okuma twin spindle, twin turret turning center so all of the machining operations are completed in one setup, thus eliminating additional fixtures and operator intervention. The resultant system reduces cycle times and requires much less operator involvement. As a result, production time per part was more than cut in half – from about 5 minutes to 2 minutes, 20 seconds.