BBAT - Wildau
Case Study BBAT Berlin Brandenburg Aerospace Technology - Wildau

Pretty tight...

... these are the manufacturing tolerances for aeronautical parts at BBAT in Wildau/Brandenburg. They manufacture rotor housings for jet engines in small volumes using m&h touch probes and software 3D Form Inspect.

Plus or minus 2 hundredths on diameters from 500mm to 800mm in relatively thin-walled housings made of tough heat-resistant steel – these are the accuracy challenges BBAT faces every day. They manufacture small quantities of housing components for jet engines, inside which air end turbine blades run. These components are used in several turbine engines for business jets and small commercial aircraft.

BBAT, or Berlin Brandenburg Aerospace Technology AG, is a joint venture of several suppliers to the aeronautical industry which, since 2008, has specialised in manufacturing out problems on these highly sophisticated turbine components. At BBAT, the turbine rings are mechanically machined and coated. The components are delivered to the engine manufacturers’ assembly department ready for installation.

Clamping and cutting of the tough materials and relatively unstable components is particularly difficult. Close tolerances must be achieved on the machine with a high degree of reliability as any errors detected later cannot be easily corrected. Reclamping a component on the machine for reworking is almost impossible and not advisable in terms of cost-efficiency and on-schedule manufacturing.

To alleviate these potential problems they have attached particular importance to the selection of tooling and ancillary equipment. In a temperature-controlled workshop they machine on 5-axis Alzmetall machining centres equipped with the Siemens 840D control. High repeatability is as important as troublefree manufacturing for small batch production. Only clamping twice, the turbine housings are completely machined using both milling and turning cycles. BBAT achieves the required close tolerances of only 4 hundredths using a sophisticated manufacturing cycle with integrated measurement on the machine...

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m&h Inprocess Messtechnik GmbH
Am Langholz 11
DE-88289 Waldburg
Germany

Phone: +49 7529 9733-0
Fax:     +49 7529 9733-7

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