Available from Index, Traub's TNL32P and TNL32 automatic lathes have several features designed to improve sliding/fixed headstock machining, including a larger workspace, 10-station turrets, higher performance data and the dual drive—a turret with two integrated drivetrains that reduces secondary processing times. Simultaneous machining on two spindles with as many as three tools ensures high productivity levels with the TNL32. The TNL32P differs from the TNL32 variant in that the Y-axis motion of the upper turret is affected by interpolation of the X, C and H axes. According to the company, the lathes are best suited for machining small parts with a maximum bar clearance of 32 mm for such industries as medical, hydraulics and automotive.
The lathes can convert from a sliding headstock to a fixed headstock turning mode and back again in just a few steps, the company says. The long Z travel of the headstock ensures proper positioning of the main spindle, either for sliding headstock turning or fixed headstock turning. The dual drive reduces auxiliary processing times and also keeps the cycle times to a minimum. While one tool is in use, the tool for the next work step can be accelerated up to the desired speed during main time and is immediately available at full speed after the turret indexing operation. This feature also eliminates jerky accelerations when reducing auxiliary processing times and cuts down on toolholder wear. A swiveling counter spindle is fitted onto an XYZ cross-slide that simultaneously also carries the lower tool turret.
Other features include the company's backworking attachment, which accommodates seven toolholders; four stations with an internal coolant supply; high-speed, high-torque drive schemes for the toolholders; integrated workpiece removal; and turret indexing on an NC rotary axis that can move to any position without a mechanical locking mechanism, enabling multiple tool assignments on each station.