Aerospace Engine Solutions Package now available from Sandvik Coromant

Citation

(2009), "Aerospace Engine Solutions Package now available from Sandvik Coromant", Aircraft Engineering and Aerospace Technology, Vol. 81 No. 5. https://doi.org/10.1108/aeat.2009.12781ead.007

Aerospace Engine Solutions Package now available from Sandvik Coromant

Article Type: Equipment and software From: Aircraft Engineering and Aerospace Technology: An International Journal, Volume 81, Issue 5

At the Paris Airshow Sandvik Coromant introduced an Aerospace Engine Solutions Package containing a number of new and existing products designed to offer a complete solution and genuine productivity benefits to a number of typical aerospace engine industry applications:

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  Turbine discs are complex turned parts that generally feature profiled pockets with various difficult clearance requirements. New CoroCut angled inserts from Sandvik Coromant are said to provide a complete and stable grooving solution for turbine disc machining. They claim optimum accessibility and the latest aerospace grade GC1115 for machining typical turbine disc materials such as Inconel 718, Waspaloy, and Udimet 720. GC1115 are said to offer increased uptime machining due to a unique PVD coating that maintains sharp edges over a longer time in cut. The modular SL70 tooling system with blades designed to fit typical profiles and pocket features, the exchangeable head CoroMill 316 for scallop milling and CoroCut inserts in grade S05F for high productivity turning complete the Sandvik Coromant package for machining turbine discs.

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  Turbine casings are typically manufactured from Inconel or Waspaloy and present machine shops with a significant number of turn-mill operations to remove large amounts of material. Here, Sandvik Coromant recommends ceramic face milling using RNGN inserts to remove metal from turbine casings up to five times faster – at speeds up to 1,000 m/min. For rough milling around boss features, CoroMill 300 is said to be the solution with round inserts to reduce notch wear and allow high-feed rates. The same cutter can be used for the secure and productive helical ramping of larger diameter holes. Completing the turbine casing programme from Sandvik Coromant is CoroMill Plura with 50° helix in grade GC1620, which is optimised for the finish profile milling of walls and bores.

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  Fan casings require careful selection of insert shape and the application of high-pressure coolant to maximise the productivity of these titanium components. SL70 is a new quick change tooling system that combines with Coromant Capto to provide excellent stability when machining difficult-to-access fan casing parts, particularly when using vertical turning lathes. Different configurations of just a few modular building blocks give this tooling (which incorporates Jetbreak high-pressure coolant technology) the right support at the right clearance for various fan casing features. With regard to inserts, Sandvik Coromant's Xcel range offers a radical and innovative solution for semi-rough turning into casing shoulders.

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  Spools feature deep internal chambers and external blade tulip grooves. Dampened blades in combination with Coromant Capto help overcome the tendency to vibrate. Directional coolant provides effective chip evacuation from the groove. Sandvik Coromant inserts are available to fit every groove shape. The ceramic grade CC6060 is recommended by as its notch wear resistance allows higher depths of cut. RCMX carbide turning inserts for finishing complete the package of products for spool machining.

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  Shafts for aerospace engine applications are manufactured from high-alloy steel or Inconel. The major challenge here is the production of deep internal features on multi-task machine tools. Here, a silent tool dampened boring bar programme from Sandvik Coromant is available in diameters up to 250 mm with 14×diameter length capability. The SL70 modular blade system offers easy access into the shaft flange, while a number of pull boring solutions are available for internal features. CoroMill 316 is the best option for scallop milling on shafts.

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  Blisk/impellor machining takes place on five-axis machining centres with good simultaneous dynamics. CoroMill Plura is a family of conical ballnose end mills that embraces 12 new products with radii and taper options ideal for the machining of blisk and impellor turbo parts. The CoroMill 316 ballnose exchangeable insert offers the optimum for rough machining titanium slots using point milling techniques. Sandvik Coromant hole making solutions on blisks and impellors embrace CoroDrill 846 and chamfering using CoroTurn XS.

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  Fan discs. Solutions from Sandvik Coromant include dampened blades to machine deep internal chambers, CoroCut angled inserts for difficult-to-access grooves, and tailored side and face cutters and profile end mills for tulip slot milling.

All of Sandvik Coromant's solutions for aerospace engine machining are detailed in its new 20-page brochure Aerospace Engine Total Component Solutions.

Contact details for editorial enquiries are available from: Sandvik Coromant, Tel.: +44 (0)121 504 5422, Fax: +44 (0)121 504 5565.