High-power turn-mill centre is extensively modular

A twin-opposed-spindle high power turn-mill centre that incorporates a Y-axis on all four turrets with driven tooling can also use any turret to machine components in either spindle.

New from German lathe manufacturer, Traub, is a twin-opposed-spindle turn-mill centre, designated TNX65, incorporating a Y-axis on all four turrets.

Each has 10 live stations (5.8kW/6,000 rev/min) and patented toolholders that obviate axial adjustment.

Sole UK agent is Geo Kingsbury Machine Tools, Gosport.

Components in either spindle may be machined by any of the turrets, each of which is conical and angled towards the spindles so that the tool is still perpendicular to the component.

This simple expedient allows long boring bars, gun drills or special units such as high frequency spindles to be mounted on the reverse of the turrets.

Normally it is impossible to employ these tools on a lathe as there is insufficient clearance between the back of the turret and the spindle nose.

A further innovation is the ability to replace one of the turrets with a gang tool carrier that can carry a live centre, allowing tailstock support of a shaft-type component in the main spindle so that the remaining three turrets can perform machining tasks on it simultaneously.

An additional option is a vertical tool carrier with high torque gearbox drive and B-axis which allows heavy duty and high speed drilling and milling at any angle.

The eight tool positions all offer live tool drive, four with an ER32 collet chuck and four with an HSK-40 taper.

The guideways for the thermally symmetrical headstock and counter spindle are mounted on a rigid, tubular, cast iron bed, a construction which offers excellent vibration damping and dynamic stiffness.

The 55 degree slant bed assures unrestricted chip flow away from the working area.

Both the main and counter motor-spindles have full C-axis and are based on an identical design with high static and dynamic rigidity, bar capacity being 65mm (optionally 42mm).

Hybrid bearings are lifetime sealed and preloaded to assure maximum turning precision.

The spindles deliver 21.5kW/170Nm at 5,000 maximum rev/min (18.3kW/145Nm at 6,300 rev/min for the 42mm capacity spindle).

Integrated cooling ensures that temperatures remain stable for high precision.

The counter spindle accelerates in Z at 1G to 60m/min and turret movement in X, Y and Z are also fast at 0.5G to 18, 30 and 15m/min respectively.

Digital axis drives are fitted for high contouring accuracy and quality of surface finish.

Absolute measuring on all axes eliminates the need for time consuming referencing at the start of a cycle.

The Traub TX8i control is said to be easy to master and has an added feature whereby, in place of the standard ATC tool measuring system, the TNX offers a patented optical tool measuring system, VATC, based on a video camera.

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