Shrouds

Shroud grinding involves a precision oriented, state-of-the-art machining system. Typical ground features are rub surfaces, radial surfaces, straight surfaces, grooves/hooks, mate faces and seal slots. As an example, Huffman grinding systems ground 24 surfaces in a single cycle, with 5 grinding wheels on a single wheel arbor, using 3 part fixtures. Multiple fixtures were placed in the machine so that one part was completed with each grinding cycle.

Process

Superabrasive grinding technology, in conjunction with a multi-axis grinding system enables the maximum number of surfaces to be ground with the minimum number of setups.

Proper application of superabrasives with a precise, reliable motion and control system, plus modular machine design enable single part flow, replacing batch flow on large rotary grindings.

Material

Cobalt and nickel based alloys.

Cycle Times

Cycle times for grinding shrouds depend on component size and amount of material removed. A typical cycle time for an aero-engine shroud is 15 to 30 minutes.

Machine Features and Benefits

• Available on the Huffman HS-195, HS-155S, HS-225 grinding systems.
• Up to 50 HP (37 kW) yields fast material removal rates.
• Optional scale feedback is available for increased accuracy.
• Quick change wheel arbors, coolant nozzle manifolds and fixtures offer fast changeover between part sizes.