Mori Seiki says its NT Series of integrated mill-turn centers combines the turning ability of a lathe and the cutting ability of a machining center. The machines employ both driven-at-the-center-of-gravity (DCG) technology and the box-in-box construction of the NH Series HMCs along with the turret and built-in milling motor of the NL Series CNC lathes.
To reduce backlash and enable high speed rotation, the machines contain B axes that use direct-drive motors. Indexing specifications for the axis allow input by units of 0.0001 degrees, which is suitable for high-precision machining, the company says. Maximum spindle speed is 5,000 rpm, and maximum tool-spindle speed is 12,000 rpm. The machines' ATCs achieve tool-to-tool change times of 1 second and chip-to-chip times of 3.4 seconds.
The lower turret is located symetrically in relation to the center of the spindle, forming a construction that resists heat, the company says. In addition, ballscrew and motor-jacket cooling can reduce innacuracies caused by heat fluctuations. The machines use the company’s Maps III control system, which is equipped with a collision-prevention function that monitors machine movements in real time. Nine models are available with various options.
Robot-Fed Multitasking Lathe with Conveyor
This machine can run for a long time without any operator intervention, and users can machine finished parts from slug stock or cast blanks while achieving the same high productivity as if they were machining from barstock, the company says.