The entry-level segment of Tornos comprises two product lines, namely the CT20 machine, the second version of the machine recently introduced, and the Swiss DT model. Both model variants are subject to constant evolution. Against this backdrop, the Swiss DT13 and Swiss DT26 models have undergone significant modifications that are aimed at improving their rigidity and axis feed rates. Moreover, the TISIS programming software has been enhanced to optimise performance and productivity.
Tornos’ CT20 is a small and sturdy machine that is easy to use with its five linear axes and two C axes. In its basic configuration, the CT20 comes equipped with driven tools for main and back machining operations. Next to the counter-spindle, the machine can accommodate two driven tools for work in main operations and be equipped with 11 driven tools – a total of 27 tools across the two machining areas. All the more, the machine can be optionally fitted with a thread-whirling cutter, a polygon cutter, a triple drilling/milling unit, as well as a slotting device for back machining.
The CT20's power is more limited in comparison with the Swiss DT13 and Swiss DT26. Tornos’ Swiss DT13 has been conceived for bar capacities of 13 mm (10 mm without bar preparation). In addition, the machine is provided with five linear axes and two C axes, while its kinematic system has been developed for high-productivity applications.
Thanks to maximum feed rates that can reach 35 mm/min and L-type kinematics, the Swiss DT13 is said to be extremely fast, with ultra-short chip-to-chip times. Maximum spindle speed is 15,000 rpm.
The machine is equipped with a motorised synchronous guide bush that is designed to improve the machining accuracy and surface finish of workpieces. However, the machine can also be converted for guide-bush-less operation and adapted to specific workpiece requirements.
Tornos’ Swiss DT13 can be equipped with 21 tools, including seven driven tools. Three driven tools are located in the main gang tool post, from where they are able to reach maximum speeds of 10,000 rpm. As an option, the Swiss DT13 can be provided with a modular position, so that a gear-hobbing unit can be mounted. This function has been deployed for many years on SwissNano and EvoDeco models.
The Swiss DT26 features five linear axes. Given the bar capacity and performance of the machine, Tornos engineers have prioritised high chip removal by arranging the gang tool post above the guide bush and spindle. With its spindles offering power of more than 10.5 kW for both main and counter operations, in combination with a bar capacity of 25.4 mm, the Swiss DT26 enables large cutting depths. Against this backdrop, high chip removal is required to tap into the full potential of the machine. Just like the Swiss DT13 model, the machine is equipped with a motorised guide bush and, in less than 15 minutes, can be converted to enable collet operation.
Tornos’ Swiss DT26 comes equipped with four radial drills for front machining operations. In addition, the machine can be provided with a thread-whirling cutter or a polygon cutter. As a result, the company says it is easy for the Swiss DT26 to produce medical screws or perform face-milling tasks.
The thread-whirling cutter can be inclined by ±15° and rotate with a maximum speed of 5,000 rpm to machine diameters of up to 10 mm. What’s more, the 80 mm diameter polygon cutter can also reach a maximum speed of 5,000 rpm. The back machining positions can be equipped with both stationary tools and driven tools. These positions are also able to accommodate advanced tooling, such as a high-frequency spindles specifically designed to machine Torx patterns, or even a slotting device.
Like any Tornos machine, the Swiss DT and CT20 machines can be equipped with many options, such as an ejection system for long workpiece up to 600 mm, and high-pressure coolant.
All Tornos machines can be programmed with TISIS programming software and this also applies to the Swiss DT and CT20 models. Moreover, they can be equipped with the company’s ‘Connectivity Pack’, which enables remote monitoring of machine status. TISIS has a database that contains the data of all tool carriers, from simple tool-holder plates to polygon cutters, milling units and thread whirling cutters. Each of these devices has its own features that are taken into account by TISIS. So, when a device is selected, only the positions that can accommodate will be enabled. Furthermore, TISIS manages any incompatibilities between various devices, and provides intuitive user guidance through the operation of the machine.