In the aerospace industry, where reliability, precision, and weight reduction are paramount, manufacturing processes must meet exacting standards. Among the various metal forming techniques used to fabricate flight-critical components, swaging stands out as a cost-effective and highly versatile cold working process. Swaging enables the formation of complex geometries with tight tolerances and excellent mechanical properties—characteristics that are essential in aerospace applications.
What Is Swaging?
Swaging is a mechanical forming process that reshapes the cross-section of a workpiece—typically a metal rod, tube, or wire—by applying radial compressive forces through a set of dies. Unlike machining, swaging is a scrap-less process, meaning it does not remove material but instead redistributes it, making it beneficial for minimizing waste and reducing costs. The final product is strong and of high quality, particularly when swaging is being used to join metal components.
There are two primary types of swaging:
Radial and Axial External Swaging: A mechanical process used to join fittings to tubing by permanently deforming the fitting to create a secure, leak-resistant connection. Specialized tools and dies are used to apply controlled compressive forces to the fitting. Both approaches produce a strong, structurally sound joint with a metal-to-metal seal—or, in some designs, a metal–Teflon–metal seal—for reliable, long-term performance.
- Hydraulic (or Stationary) Swaging: In this variation, the dies are stationary, and a hydraulic ram forces the workpiece into the dies. This method is often used for attaching fittings or connectors to cables or tubes.
Key Benefits of Swaging
Superior Mechanical Properties
Swaging enhances the material’s mechanical strength through strain hardening. The cold working process refines the grain structure and improves fatigue resistance—critical factors in aerospace environments subject to cyclical loading.
Material Efficiency
Since swaging does not remove material, it reduces waste and maximizes raw material use. This is especially valuable when working with expensive aerospace-grade metals such as titanium or Inconel.
Precision and Repeatability
Swaging achieves tight dimensional tolerances, often without secondary machining. The process can produce concentric, tapered, or stepped geometries with high repeatability, making it ideal for manufacturing components in large volumes.
Cost-Effective Assembly
Swaging can be used to securely attach fittings, connectors, or couplings to tubes and cables. This eliminates the need for welding, threading, or adhesives, reducing assembly time and cost while improving joint integrity.
Reliable and Secure Connections
The tight connection formed in the swaging process results in strong, leak-proof attachments that withstand various pressures and vibrations.
Applications of Swaging
- Joining metal parts: Swaging can be used to attach fittings to cables, pipes, and other components, creating secure connections.
- Landing Gear Components: Swaging is employed to form solid or hollow struts and actuators, helping to meet stringent mechanical requirements and minimize mass.
- Hydraulic and Fuel Lines: Tubes are swaged to connect with fittings or flared ends, ensuring leak-proof, high-pressure joints in fluid transfer systems.
Contact Lafarge & Egge for your swaging needs
Swaging is a critical forming process that offers numerous advantages for aerospace manufacturers, including enhanced material performance, reduced waste, and lightweight design. At L&E, we pride ourselves in our consistent quality and ability to handle complex swaging jobs. As the aerospace and other mechanical industries continue moving towards prioritizing low cost, low waste, and efficient constructions, swaging remains a key technology. As a company that also performs tool and die repair, we can help in a variety of ways to benefit your projects. Contact us today to see how we can help you.
