The machine is configured with only one turret and a rear unit. Simplified alternatives are used for other components. The result: a flexible, cost-effective, and efficient turning automaton that is suitable for simple, high-precision parts, such as those required in medical technology.
With the TRAUB TNL12 lean, customers receive a very flexible machine that, like all other TNL machines, can be quickly converted from long to short turning. Like the 'normal' TNL12, the lean variant is compactly built, with a control cabinet completely integrated into the machine. The cast iron bed and the thermosymmetric design ensure high accuracy, combined with a short warm-up time. Externally, only the working area door makes a difference, as it has received a simplified design.
High-dynamic drives
The two liquid-cooled 4.4 kW motor spindles allow speeds of up to 12,000 rpm and ensure high dynamics. This property is supported by lightweight clamping cylinders and a guide bushing made of carbon, which is driven and adjustable but not programmable in the lean variant of the TNL12.
The tool turret has a servo motor and thus an interpolated Y-axis, contributing to short chip-to-chip times of only 0.3 s. The six tool stations provide space for double holders. For internal machining (Z-direction), they can also be equipped with angled tool holders – effectively as a substitute for the missing front unit. As an option, INDEX offers a swirling unit that can be integrated into the turret, suitable for high-speed swirling with a swivel angle of ±30° – with a swirl length of 75 mm. The tool drive is realized without belts and intermediate shafts – with only one tooth engagement in the crown wheel, contributing to quiet operation and high dynamics.
The rear unit includes six tool stations, four of which are driven, and a discharge unit for the finished workpieces. These can be directed into a container, for which the TNL12 lean is prepared. Optionally, this can be replaced with a double container or an eight-fold selector.
Simplified coolant supply
The coolant (KSS) is supplied by a low-pressure pump with 5 bar in the TNL12 lean, rather than a high-pressure pump. This results in such a low heat input into the cutting oil that INDEX, as standard, does not rely on cutting oil cooling. A 1.7 kW water/air spindle cooler is provided, which can optionally be replaced by a spindle and cutting oil cooler water/air or water/water, each with 3.3 kW. An internal coolant supply (IKZ) for the tools is not provided, and the external KSS supply at the upper turret is also omitted. The cutting oil tank holds 280 liters. The chip tray is equipped with chip hooks and a removable inner tray, as well as a sieve basket with 200 µm mesh.
The current TRAUB TX8i-s control ensures easy operation, prepared for the direct integration of the TNL12 into the digital iXworld. The foldable and swivelable control panel contains a 19” touch monitor – ideally suited for iXpanel functionalities, which open easy access to a connected production.
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