What sets Bond’s RFSSW machine apart?
- Rapid tool changeover
- Higher torque
- Higher RPM
- Faster cycle time
- Lighter weight
The RFSSW machine has been designed with high-volume production in mind but is just as comfortable in a research environment. It is perfectly suited for airplane structures and automotive aluminum sheet metal.
How RFSSW technology works
To address the main concerns with FSSW (a small weld area and remaining exit hole) HZG developed and patented their RFSSW technology, which they have shared with Bond for the creation of production welding systems.
Refill friction stir spot welding is a relatively new solid-state joining process which stands up as an alternative for producing overlap spot joints. The process uses a non-consumable tool consisting of two movable parts – pin and sleeve – mounted coaxially to a clamping ring.
In the first stage, the upper and lower plates are pinched together between the clamping ring and the backing anvil, while both the pin and the sleeve begin rotating. In the second stage, the pin and sleeve move in opposite direction to each other; one is plunged into the material while the other withdraws, creating a temporary reservoir, where the displaced material is held. Finally, axial motion reverses, pushing the plasticized material back where it began. The rotating pin and sleeve generate all of the heat in the process through solid-state plastic deformation, eliminating the need for shielding gas and filler metal.
Bond’s RFSSW machine for industrial uses
More traditional fastening techniques, such as clinching and riveting, are often costly and prone to corrosion issues. These processes are known for high operational costs from tooling and upkeep. Fusion-based spot welding techniques are prone to defects caused by solidification, making porosity and solidification cracking possible.
Implementing RFSSW into your production processes will mean cost savings, quality assurance and higher performance. If you have questions about incorporating RFSSW into your assembly line, contact Bond Technologies to discuss the best solutions for your product and industry needs.