Rotary Friction Welding is a “solid-state joint process that produces coalescence of materials under compressive force contact of workpieces rotating or moving relative to one another to produce heat and to plastically displace material from the faying surfaces.”*
Used in the United States and Europe for more than 50 years, friction welding has been a well-kept secret. Sometimes it is referred to as spin weld or spin welding, because one part is rotated in process. As customers learn and understand the process, benefits become clear.
Reduce material consumption and shorten machine cycle time
The ability to create near-net shape blanks offers manufacturers an opportunity to reduce material consumption and shorten machining cycle time. Joining dissimilar metals like stainless steel alloys to other metals provides unique design flexibility.
Friction Welding Methods
Computer controlled Direct-Drive Rotary Friction Welding: provides continuous speed control through the cycle, and stops according to a computer parameter developed specific to the part.
Inertia Friction Welding: this uses part rotation under pressure to heat the faying surfaces.
- This uses a flywheel to generate the rotational momentum in the part-holding chuck.
- The flywheel-driven chuck spins until it stops when the weld zone seizes. This inertia method is also sometimes described by the colloquial term, spin weld.
* The Friction Welding Process was formally defined by the AWS on Oct 15, 2008, in the Recommended Practices AWS C6.1 for the Welding Industry.