The new TRAUB TNL42 automatic lathe will make its North American debut at IMTS 2014. Developed for high production precision turning, the new 42 mm TNL42 fixed headstock automatic lathe adds to the series of CNC fixed/sliding headstock automatic lathes, the TNL18 and TNL32. The new machine is for production of turned parts up to 250 mm in length and of geometrically complex workpieces in large and medium volumes.
With two tool turrets, a main spindle with C-axis and 42 mm bar capacity (7,000 RPM, max. 29 kW and 65 Nm) and a swivel counter spindle with C-axis for extensive rear end machining, the TNK42 offers high production rates with only 5.5 m2
"The vertical design of the machine with a set-up-friendly work area permits unobstructed chip flow and better ergonomics for set-up operations," said a company spokesperson. "The stable, vertical cast machine bed is mounted on a heavy cast iron machine base, providing excellent damping properties for high-precision cutting."
The upper tool turret has 10 stations with slide travels of 140 mm in the X-axis and 300 mm in the Z-axis. All stations in the upper turret can be equipped with live toolholders. Turret indexing is accomplished with an NC rotary axis with a direct measuring system, avoiding the need for any mechanical lock, thereby allowing fast positioning of the turrets at any angle. This way, multiple tools can be assigned to each station, so that the upper tool carrier can be equipped with up to 20 tools.
The standard built-in Y-axis for the two turrets is formed by the interpolated movement of the CNC turret indexing H-axis and simultaneously the C-axis of the work spindle as well as the X-axis of the tool carrier. Through this combined motion, along with the powerful tool drives (with max. 5 kW / 8 Nm / 12,000 RPM), the TNK42 provides a large Y-travel for all turrets, e.g., to mill surfaces and grooves on workpieces or to drill axis-parallel off-center holes.
TRAUB has also reduced idle time with its optional Dual Drive system for the upper turret, where two separate drive trains are used to ramp up the speed for the next tool while still cutting with the current tool. This means the new tool is indexed to the machining position at full speed, reducing secondary processing times and extending the service life of the live tool holders.
Apart from its function as a lower tool turret with nine stations and identical functionality as the upper tool turret, the lower cross-slide serves as a swivel counter-spindle for rear-end machining of workpieces.
The swivel movement of the counter spindle is achieved through the CNC turret indexing axis (H-axis), thereby providing a counter spindle with a C-axis that can be moved in three axes (XHZ), allowing unrestricted counter spindle machining at 7,000 RPM (max. 12 kW and 22.5 Nm) and 42 mm spindle clearance.
The CNC control TRAUB TX8i-s tailored to the TRAUB TNK42 is designed based on the TRAUB TX8i series and combines performance with high reliability, according to the company.
For more information contact:
INDEX Corporation
14700 North Pointe Blvd.
Noblesville, IN 46060
317-770-6300
sales@index-usa.com
www.index-usa.com
IMTS 2014 Booth S-8136