The document discusses the manufacturing process for flash butt welded engine rings from aluminum extrusions. It describes how extruding the aluminum into near-net ring profiles reduces material usage and fabrication time compared to traditional machining. The process involves extruding the aluminum, forming it into rings, butt welding the ends together, finish machining and trimming to produce the final rings.

1. Extruded Shapes for Flash
Butt Welded Engine Rings
Photos Courtesy of:
The Defontaine Group
Nantes, France

2. Extruded Shapes for Engine
Rings
Profilés

3. Forming of Ring from Extrusion

4. CroquageRing Forming (continued)

5. SoudageRing Forming(continued)

6. Soudage
Butt Welding of Extrusion
(courtesy of Defontaine Group)

7. Flash Material after Welding

8. TournageFinish Machine and Trim

9. FLASH BUTT WELDED ENGINE RINGS

10. Manufacturing Flash Butt
Welded Rings from Extrusions
• Reduced material usage
• Near-net profiles = Reduced fabrication time
• Design changes are easily made