Process Description
Baffles are located in the stationary nozzle guide vanes and provide accurate impingement cooling on the inside of the hollow airfoils. These parts are made from sheet metal and have a complex shape with a large number of small holes located over the surface within narrow tolerances. Latest computer generated designs often have a 3D shape. These parts are made by cold sheet metal forming and automatic TIG welding. Holes are punched, drilled by laser or drilled with specially designed multi-hole EDM tools.

The larger inserts used in large, industrial gas turbines are fabricated from several sheet metal details that are later assembled together by high temperature vacuum brazing.

The range of products includes:
• Baffles / Vane Inserts
• Cover Plates
• Washers and Shims

Features of Aero Engine Baffles and Vane Inserts
Manufacturing Processes:

• Press forming
• CNC machining
• Punching
• Laser drilling and cutting
• Electro discharge machining (EDM)
• Robot supported welding
• Vacuum heat treatments
• High temperature vacuum brazing
• Flow test on airflow test bench
• Fluorescent penetrant inspection
• CMM, Quick Vision