energy

Synergy at its finest

The Starrag LX 021 is based on a proven and successful product and brings together the expertise of both Starrag and Bumotec in the form of a small, specialised machine for the complete machining of turbine blades.

Turbine blade production to Swiss levels of precision

It is not often that Günter Leitold, Automation Product Manager, will wax lyrical about machines. The new Starrag LX 021 is an exception. “The machine is designed for the complete machining of turbine blades down to 200 mm in a single clamping position”, Leitold explains. Up until now, there have hardly been any machines available on the market to cater for high-precision complete machining tasks. This is because previously demand was for turbine blades with rather more simple geometric shapes, which are usually formed from forged or cast blanks. Nowadays, however, turbine blades with more complex geometries are gaining in popularity. These blades are made from highly sophisticated materials that are difficult to machine, and thus exhibit extremely low rigidity and poor damping properties.

Starrag LX 021

Première: The new Starrag LX 021 machine is designed for the complete machining of turbine blades down to 200 mm in a single clamping position.

30% shorter cycle times due to complete machining in a single clamping position

A five-axis machining centre from Bumotec is now available for precisely this task definition. Starrag has also adapted this machine to meet the high demands of materials that are extremely difficult to machine, such as titanium and nickel-based alloys. The Starrag LX 021 rounds off the LX series, which has been specially designed for the high-precision, efficient, simultaneous five-axis machining of turbine blades. “By using this machine, turbine blade manufacturers can now benefit from solid, high-precision machine technology that Bumotec originally developed for the watch and jewellery industry”, Leitold notes. The machine is generally suitable for machining turbine blades of all kinds up to a finished length of 200 mm. Example products include turbine blades for gas or high-pressure damping turbines.

The option to fit an automatic bar loader unit to the machine is also available. For Günter Leitold, the retaking unit with integrated revolver unit onto which up to three different active clamping elements can be placed is a particular highlight of the machine. He notes that it is this elegant solution that gives users the option of machining from all sides – an essential prerequisite for machining in a single clamping position. What’s more, the Starrag LX 021 not only operates as a stand-alone machine, but can also be integrated into a flexible machining system (FMS) thanks to a positioning station (automatic pallet changer).